修改第三方jar包里的类的方法

原创

花落花相惜

修改于 2021-11-23 13:03:57

2.5K0

<?xml version="1.0" encoding="UTF-8"?>

<beans xmlns="http://www.springframework.org/schema/beans"

    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context"

    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd

        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd

">

    <import resource="classpath:ureport-core-context.xml"/>

    <import resource="classpath:ureport-font-context.xml"/>

    <bean id="ureport.datasourceServletAction" class="com.bstek.ureport.console.designer.DatasourceServletAction"></bean>

    <bean id="ureport.resourceLoaderServletAction" class="com.bstek.ureport.console.res.ResourceLoaderServletAction"></bean>

    <bean id="ureport.designerServletAction" class="com.bstek.ureport.console.designer.DesignerServletAction">

        <property name="reportRender" ref="ureport.reportRender"></property>

        <property name="reportParser" ref="ureport.reportParser"></property>

    </bean>

    <bean id="ureport.searchFormDesignerAction" class="com.bstek.ureport.console.designer.SearchFormDesignerAction"></bean>

    <bean id="ureport.htmlPreviewServletAction" class="com.bstek.ureport.console.html.HtmlPreviewServletAction">

        <property name="exportManager" ref="ureport.exportManager"></property>

        <property name="reportBuilder" ref="ureport.reportBuilder"></property>

        <property name="reportRender" ref="ureport.reportRender"></property>

    </bean>

    <bean id="ureport.exportWordServletAction" class="com.bstek.ureport.console.word.ExportWordServletAction">

        <property name="exportManager" ref="ureport.exportManager"></property>

        <property name="reportBuilder" ref="ureport.reportBuilder"></property>

    </bean>

    <bean id="ureport.exportPdfServletAction" class="com.bstek.ureport.console.pdf.ExportPdfServletAction">

        <property name="exportManager" ref="ureport.exportManager"></property>

        <property name="reportBuilder" ref="ureport.reportBuilder"></property>

        <property name="reportRender" ref="ureport.reportRender"></property>

    </bean>

    <bean id="ureport.exportExcelServletAction" class="com.bstek.ureport.console.excel.ExportExcelServletAction">

        <property name="exportManager" ref="ureport.exportManager"></property>

        <property name="reportBuilder" ref="ureport.reportBuilder"></property>

    </bean>

    <bean id="ureport.exportExcel97ServletAction" class="com.bstek.ureport.console.excel.ExportExcel97ServletAction">

        <property name="exportManager" ref="ureport.exportManager"></property>

        <property name="reportBuilder" ref="ureport.reportBuilder"></property>

    </bean>

    <bean id="ureport.imageServletAction" class="com.bstek.ureport.console.image.ImageServletAction"></bean>

    <bean id="ureport.importExcelServletAction" class="com.bstek.ureport.console.importexcel.ImportExcelServletAction"></bean>

    <bean id="ureport.chartServletAction" class="com.bstek.ureport.console.chart.ChartServletAction"></bean>

    <bean id="ureport.httpSessionReportCache" class="com.bstek.ureport.console.cache.HttpSessionReportCache">

        <property name="disabled" value="${ureport.disableHttpSessionReportCache}"></property>

    </bean>

</beans>

可以看到我想修改的类被加入到了spring中管理

我们先来看看这个类的方法：

/*******************************************************************************

 * Copyright 2017 Bstek
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License.  You may obtain a copy
 * of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
 * License for the specific language governing permissions and limitations under
 * the License.
 ******************************************************************************/
package com.bstek.ureport.console.designer;

import java.io.IOException;

import java.io.InputStream;

import java.io.PrintWriter;

import java.util.ArrayList;

import java.util.Collection;

import java.util.HashMap;

import java.util.List;

import java.util.Map;

import javax.servlet.ServletException;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import org.antlr.v4.runtime.ANTLRInputStream;

import org.antlr.v4.runtime.CommonTokenStream;

import org.apache.commons.io.IOUtils;

import org.apache.velocity.Template;

import org.apache.velocity.VelocityContext;

import org.springframework.beans.BeansException;

import org.springframework.context.ApplicationContext;

import com.bstek.ureport.cache.CacheUtils;

import com.bstek.ureport.console.RenderPageServletAction;

import com.bstek.ureport.console.cache.TempObjectCache;

import com.bstek.ureport.console.exception.ReportDesignException;

import com.bstek.ureport.definition.ReportDefinition;

import com.bstek.ureport.dsl.ReportParserLexer;

import com.bstek.ureport.dsl.ReportParserParser;

import com.bstek.ureport.dsl.ReportParserParser.DatasetContext;

import com.bstek.ureport.export.ReportRender;

import com.bstek.ureport.expression.ErrorInfo;

import com.bstek.ureport.expression.ScriptErrorListener;

import com.bstek.ureport.parser.ReportParser;

import com.bstek.ureport.provider.report.ReportProvider;

/**

 * @author Jacky.gao
 * @since 2017年1月25日
 */
public class DesignerServletAction extends RenderPageServletAction {
    private ReportRender reportRender;
    private ReportParser reportParser;
    private List<ReportProvider> reportProviders=new ArrayList<ReportProvider>();
    @Override
    public void execute(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        String method=retriveMethod(req);
        if(method!=null){
            invokeMethod(method, req, resp);
        }else{
            VelocityContext context = new VelocityContext();
            context.put("contextPath", req.getContextPath());
            resp.setContentType("text/html");
            resp.setCharacterEncoding("utf-8");
            Template template=ve.getTemplate("ureport-html/designer.html","utf-8");
            PrintWriter writer=resp.getWriter();
            template.merge(context, writer);
            writer.close();
        }
    }
    public void scriptValidation(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        String content=req.getParameter("content");
        ANTLRInputStream antlrInputStream=new ANTLRInputStream(content);
        ReportParserLexer lexer=new ReportParserLexer(antlrInputStream);
        CommonTokenStream tokenStream=new CommonTokenStream(lexer);
        ReportParserParser parser=new ReportParserParser(tokenStream);
        ScriptErrorListener errorListener=new ScriptErrorListener();
        parser.removeErrorListeners();
        parser.addErrorListener(errorListener);
        parser.expression();
        List<ErrorInfo> infos=errorListener.getInfos();
        writeObjectToJson(resp, infos);
    }

    public void conditionScriptValidation(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {

        String content=req.getParameter("content");

        ANTLRInputStream antlrInputStream=new ANTLRInputStream(content);

        ReportParserLexer lexer=new ReportParserLexer(antlrInputStream);

        CommonTokenStream tokenStream=new CommonTokenStream(lexer);

        ReportParserParser parser=new ReportParserParser(tokenStream);

        ScriptErrorListener errorListener=new ScriptErrorListener();

        parser.removeErrorListeners();

        parser.addErrorListener(errorListener);

        parser.expr();

        List<ErrorInfo> infos=errorListener.getInfos();

        writeObjectToJson(resp, infos);

    public void parseDatasetName(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {

        String expr=req.getParameter("expr");

        ANTLRInputStream antlrInputStream=new ANTLRInputStream(expr);

        ReportParserLexer lexer=new ReportParserLexer(antlrInputStream);

        CommonTokenStream tokenStream=new CommonTokenStream(lexer);

        ReportParserParser parser=new ReportParserParser(tokenStream);

        parser.removeErrorListeners();

        DatasetContext ctx=parser.dataset();

        String datasetName=ctx.Identifier().getText();

        Map<String,String> result=new HashMap<String,String>();

        result.put("datasetName", datasetName);

        writeObjectToJson(resp, result);

    public void savePreviewData(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {

        String content=req.getParameter("content");

        content=decodeContent(content);

        InputStream inputStream=IOUtils.toInputStream(content,"utf-8");

        ReportDefinition reportDef=reportParser.parse(inputStream,"p");

        reportRender.rebuildReportDefinition(reportDef);

        IOUtils.closeQuietly(inputStream);

        TempObjectCache.putObject(PREVIEW_KEY, reportDef);

    public void loadReport(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {

        String file=req.getParameter("file");

        if(file==null){

            throw new ReportDesignException("Report file can not be null.");

        file=ReportUtils.decodeFileName(file);

        Object obj=TempObjectCache.getObject(file);

        if(obj!=null && obj instanceof ReportDefinition){

            ReportDefinition reportDef=(ReportDefinition)obj;

            TempObjectCache.removeObject(file);

            writeObjectToJson(resp, new ReportDefinitionWrapper(reportDef));

        }else{

            ReportDefinition reportDef=reportRender.parseReport(file);

            writeObjectToJson(resp, new ReportDefinitionWrapper(reportDef));

    public void deleteReportFile(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {

        String file=req.getParameter("file");

        if(file==null){

            throw new ReportDesignException("Report file can not be null.");

        ReportProvider targetReportProvider=null;

        for(ReportProvider provider:reportProviders){

            if(file.startsWith(provider.getPrefix())){

                targetReportProvider=provider;

                break;

        if(targetReportProvider==null){

            throw new ReportDesignException("File ["+file+"] not found available report provider.");

        targetReportProvider.deleteReport(file);

    public void saveReportFile(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {

        String file=req.getParameter("file");

        file=ReportUtils.decodeFileName(file);

        String content=req.getParameter("content");

        content=decodeContent(content);

        ReportProvider targetReportProvider=null;

        for(ReportProvider provider:reportProviders){

            if(file.startsWith(provider.getPrefix())){

                targetReportProvider=provider;

                break;

        if(targetReportProvider==null){

            throw new ReportDesignException("File ["+file+"] not found available report provider.");

        targetReportProvider.saveReport(file, content);

        InputStream inputStream=IOUtils.toInputStream(content,"utf-8");

        ReportDefinition reportDef=reportParser.parse(inputStream, file);

        reportRender.rebuildReportDefinition(reportDef);

        CacheUtils.cacheReportDefinition(file, reportDef);

        IOUtils.closeQuietly(inputStream);

    public void loadReportProviders(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {

        writeObjectToJson(resp, reportProviders);

    public void setReportRender(ReportRender reportRender) {

        this.reportRender = reportRender;

    public void setReportParser(ReportParser reportParser) {

        this.reportParser = reportParser;

    @Override

    public void setApplicationContext(ApplicationContext applicationContext)throws BeansException {

        super.setApplicationContext(applicationContext);

        Collection<ReportProvider> providers=applicationContext.getBeansOfType(ReportProvider.class).values();

        for(ReportProvider provider:providers){

            if(provider.disabled() || provider.getName()==null){

                continue;

            reportProviders.add(provider);

    @Override

    public String url() {

        return "/designer";

没错，作者我本人想修改ureport2的loadReport方法，因为框架中的下载文件名一直是ureport-p.xlsx，所以我想修改。

作者在这里提供2种方法，有一种方法是我工作的老大给的建议

1：我的思路

image.png

新建一个类和jar包类的方法一模一样，因为自己的代码的优先级高于maven依赖的版本

参考网址：https://blog.csdn.net/yw_1207/article/details/80828236

代码如下：

package com.sf.energy.nplatform.report.adapter;

import com.bstek.ureport.cache.CacheUtils;

import com.bstek.ureport.console.RenderPageServletAction;

import com.bstek.ureport.console.cache.TempObjectCache;

import com.bstek.ureport.console.designer.ReportDefinitionWrapper;

import com.bstek.ureport.console.designer.ReportUtils;

import com.bstek.ureport.console.exception.ReportDesignException;

import com.bstek.ureport.definition.ReportDefinition;

import com.bstek.ureport.dsl.ReportParserLexer;

import com.bstek.ureport.dsl.ReportParserParser;

import com.bstek.ureport.export.ReportRender;

import com.bstek.ureport.expression.ErrorInfo;

import com.bstek.ureport.expression.ScriptErrorListener;

import com.bstek.ureport.parser.ReportParser;

import com.bstek.ureport.provider.report.ReportProvider;

import org.antlr.v4.runtime.ANTLRInputStream;

import org.antlr.v4.runtime.CommonTokenStream;

import org.apache.commons.io.IOUtils;

import org.apache.velocity.Template;

import org.apache.velocity.VelocityContext;

import org.springframework.beans.BeansException;

import org.springframework.context.ApplicationContext;

import javax.servlet.ServletException;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import java.io.IOException;

import java.io.InputStream;

import java.io.PrintWriter;

import java.util.*;

/**

 * @Author bi xuan
 * @Date 1/27/2021 2:52 PM
 * @Version 1.0
 */
public class DesignerServletAction  extends RenderPageServletAction {
    private ReportRender reportRender;
    private ReportParser reportParser;
    private List<ReportProvider> reportProviders=new ArrayList<ReportProvider>();
    private String fileName;
    public String getFileName() {
        return fileName;
    }

    @Override

    public void execute(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {

        String method=retriveMethod(req);

        if(method!=null){

            invokeMethod(method, req, resp);

        }else{

            VelocityContext context = new VelocityContext();

            context.put("contextPath", req.getContextPath());

            resp.setContentType("text/html");

            resp.setCharacterEncoding("utf-8");

            Template template=ve.getTemplate("ureport-html/designer.html","utf-8");

            PrintWriter writer=resp.getWriter();

            template.merge(context, writer);

            writer.close();

    public void scriptValidation(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {

        String content=req.getParameter("content");

        ANTLRInputStream antlrInputStream=new ANTLRInputStream(content);

        ReportParserLexer lexer=new ReportParserLexer(antlrInputStream);

        CommonTokenStream tokenStream=new CommonTokenStream(lexer);

        ReportParserParser parser=new ReportParserParser(tokenStream);

        ScriptErrorListener errorListener=new ScriptErrorListener();

        parser.removeErrorListeners();

        parser.addErrorListener(errorListener);

        parser.expression();

        List<ErrorInfo> infos=errorListener.getInfos();

        writeObjectToJson(resp, infos);

    public void conditionScriptValidation(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {

        String content=req.getParameter("content");

        ANTLRInputStream antlrInputStream=new ANTLRInputStream(content);

        ReportParserLexer lexer=new ReportParserLexer(antlrInputStream);

        CommonTokenStream tokenStream=new CommonTokenStream(lexer);

        ReportParserParser parser=new ReportParserParser(tokenStream);

        ScriptErrorListener errorListener=new ScriptErrorListener();

        parser.removeErrorListeners();

        parser.addErrorListener(errorListener);

        parser.expr();

        List<ErrorInfo> infos=errorListener.getInfos();

        writeObjectToJson(resp, infos);

    public void parseDatasetName(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {

        String expr=req.getParameter("expr");

        ANTLRInputStream antlrInputStream=new ANTLRInputStream(expr);

        ReportParserLexer lexer=new ReportParserLexer(antlrInputStream);

        CommonTokenStream tokenStream=new CommonTokenStream(lexer);

        ReportParserParser parser=new ReportParserParser(tokenStream);

        parser.removeErrorListeners();

        ReportParserParser.DatasetContext ctx=parser.dataset();

        String datasetName=ctx.Identifier().getText();

        Map<String,String> result=new HashMap<String,String>();

        result.put("datasetName", datasetName);

        writeObjectToJson(resp, result);

    public void savePreviewData(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {

        String content=req.getParameter("content");

        content=decodeContent(content);

        InputStream inputStream= IOUtils.toInputStream(content,"utf-8");

        ReportDefinition reportDef=reportParser.parse(inputStream,"p");

        reportRender.rebuildReportDefinition(reportDef);

        IOUtils.closeQuietly(inputStream);

        TempObjectCache.putObject(PREVIEW_KEY, reportDef);

    public void loadReport(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {

        String file=req.getParameter("file");

        if(file==null){

            throw new ReportDesignException("Report file can not be null.");

        //备注file不能修改，调试源码时发现这个loadReport被调用了两次，第一次是加载整个报表界面使用，第二次是加载报表列表使用,改了就会报错

        file= ReportUtils.decodeFileName(file);

        this.fileName = file;

//        this.fileName = this.fileName.replace("file:","").split(".")[0];

        this.fileName = this.fileName.replace("file:","").split("\\.")[0];

        Object obj=TempObjectCache.getObject(file);

        if(obj!=null && obj instanceof ReportDefinition){

            ReportDefinition reportDef=(ReportDefinition)obj;

            TempObjectCache.removeObject(file);

            writeObjectToJson(resp, new ReportDefinitionWrapper(reportDef));

        }else{

            ReportDefinition reportDef=reportRender.parseReport(file);

            writeObjectToJson(resp, new ReportDefinitionWrapper(reportDef));

    public void deleteReportFile(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {

        String file=req.getParameter("file");

        if(file==null){

            throw new ReportDesignException("Report file can not be null.");

        ReportProvider targetReportProvider=null;

        for(ReportProvider provider:reportProviders){

            if(file.startsWith(provider.getPrefix())){

                targetReportProvider=provider;

                break;

        if(targetReportProvider==null){

            throw new ReportDesignException("File ["+file+"] not found available report provider.");

        targetReportProvider.deleteReport(file);

    public void saveReportFile(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {

        String file=req.getParameter("file");

        file=ReportUtils.decodeFileName(file);

        String content=req.getParameter("content");

        content=decodeContent(content);

        ReportProvider targetReportProvider=null;

        for(ReportProvider provider:reportProviders){

            if(file.startsWith(provider.getPrefix())){

                targetReportProvider=provider;

                break;

        if(targetReportProvider==null){

            throw new ReportDesignException("File ["+file+"] not found available report provider.");

        targetReportProvider.saveReport(file, content);

        InputStream inputStream=IOUtils.toInputStream(content,"utf-8");

        ReportDefinition reportDef=reportParser.parse(inputStream, file);

        reportRender.rebuildReportDefinition(reportDef);

        CacheUtils.cacheReportDefinition(file, reportDef);

        IOUtils.closeQuietly(inputStream);

    public void loadReportProviders(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {

        writeObjectToJson(resp, reportProviders);

    public void setReportRender(ReportRender reportRender) {

        this.reportRender = reportRender;

    public void setReportParser(ReportParser reportParser) {

        this.reportParser = reportParser;

    @Override

    public void setApplicationContext(ApplicationContext applicationContext)throws BeansException {

        super.setApplicationContext(applicationContext);

        Collection<ReportProvider> providers=applicationContext.getBeansOfType(ReportProvider.class).values();

        for(ReportProvider provider:providers){

            if(provider.disabled() || provider.getName()==null){

                continue;

            reportProviders.add(provider);

    @Override

    public String url() {

        return "/designer";

然后将其加入到spring管理中，我这里使用的和框架一样的方式，使用xml的bean标签加入到xml中

<?xml version="1.0" encoding="UTF-8"?>

<beans xmlns="http://www.springframework.org/schema/beans"

    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context"

    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd

        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd

">

    <import resource="classpath:ureport-core-context.xml"/>

    <import resource="classpath:ureport-font-context.xml"/>

    <bean id="ureport.datasourceServletAction" class="com.bstek.ureport.console.designer.DatasourceServletAction"></bean>

    <bean id="ureport.resourceLoaderServletAction" class="com.bstek.ureport.console.res.ResourceLoaderServletAction"></bean>

    <bean id="ureport.DesignerServletAction" class="com.sf.energy.nplatform.report.adapter.DesignerServletAction">

        <property name="reportRender" ref="ureport.reportRender"></property>

        <property name="reportParser" ref="ureport.reportParser"></property>

    </bean>

    <bean id="ureport.searchFormDesignerAction" class="com.bstek.ureport.console.designer.SearchFormDesignerAction"></bean>

    <bean id="ureport.htmlPreviewServletAction" class="com.bstek.ureport.console.html.HtmlPreviewServletAction">

        <property name="exportManager" ref="ureport.exportManager"></property>

        <property name="reportBuilder" ref="ureport.reportBuilder"></property>

        <property name="reportRender" ref="ureport.reportRender"></property>

    </bean>

    <bean id="ureport.exportWordServletAction" class="com.bstek.ureport.console.word.ExportWordServletAction">

        <property name="exportManager" ref="ureport.exportManager"></property>

        <property name="reportBuilder" ref="ureport.reportBuilder"></property>

    </bean>

    <bean id="ureport.exportPdfServletAction" class="com.bstek.ureport.console.pdf.ExportPdfServletAction">

        <property name="exportManager" ref="ureport.exportManager"></property>

        <property name="reportBuilder" ref="ureport.reportBuilder"></property>

        <property name="reportRender" ref="ureport.reportRender"></property>

    </bean>

    <bean id="ureport.exportExcelServletAction" class="com.sf.energy.nplatform.report.adapter.ExportExcelServletActionAdapter">

        <property name="exportManager" ref="ureport.exportManager"></property>

        <property name="reportBuilder" ref="ureport.reportBuilder"></property>

    </bean>

    <bean id="ureport.exportExcel97ServletAction" class="com.bstek.ureport.console.excel.ExportExcel97ServletAction">

        <property name="exportManager" ref="ureport.exportManager"></property>

        <property name="reportBuilder" ref="ureport.reportBuilder"></property>

    </bean>

    <bean id="ureport.imageServletAction" class="com.bstek.ureport.console.image.ImageServletAction"></bean>

    <bean id="ureport.importExcelServletAction" class="com.bstek.ureport.console.importexcel.ImportExcelServletAction"></bean>

    <bean id="ureport.chartServletAction" class="com.bstek.ureport.console.chart.ChartServletAction"></bean>

    <bean id="ureport.httpSessionReportCache" class="com.bstek.ureport.console.cache.HttpSessionReportCache">

        <property name="disabled" value="${ureport.disableHttpSessionReportCache}"></property>

    </bean>

</beans>

修改的代码：

 <bean id="ureport.DesignerServletAction" class="com.sf.energy.nplatform.report.adapter.DesignerServletAction">

        <property name="reportRender" ref="ureport.reportRender"></property>

        <property name="reportParser" ref="ureport.reportParser"></property>

    </bean>

之前的calss为jar包里类的reference。

由于jvm的加载优先级问题，就会找bean的id找到我们的类进行实例化加到bean，替代了框架里的类。

到此我们思路结束了。

2：我工作老大的思路

image.png

新建一个adapter类

代码如下：

package com.sf.energy.nplatform.report.adapter;

import com.bstek.ureport.cache.CacheUtils;

import com.bstek.ureport.console.RenderPageServletAction;

import com.bstek.ureport.console.cache.TempObjectCache;

import com.bstek.ureport.console.designer.DesignerServletAction;

import com.bstek.ureport.console.designer.ReportDefinitionWrapper;

import com.bstek.ureport.console.designer.ReportUtils;

import com.bstek.ureport.console.exception.ReportDesignException;

import com.bstek.ureport.definition.ReportDefinition;

import com.bstek.ureport.dsl.ReportParserLexer;

import com.bstek.ureport.dsl.ReportParserParser;

import com.bstek.ureport.export.ReportRender;

import com.bstek.ureport.expression.ErrorInfo;

import com.bstek.ureport.expression.ScriptErrorListener;

import com.bstek.ureport.parser.ReportParser;

import com.bstek.ureport.provider.report.ReportProvider;

import org.antlr.v4.runtime.ANTLRInputStream;

import org.antlr.v4.runtime.CommonTokenStream;

import org.apache.commons.io.IOUtils;

import org.apache.velocity.Template;

import org.apache.velocity.VelocityContext;

import org.springframework.beans.BeansException;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.context.ApplicationContext;

import org.springframework.context.annotation.Bean;

import org.springframework.stereotype.Component;

import javax.servlet.ServletException;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import java.io.IOException;

import java.io.InputStream;

import java.io.PrintWriter;

import java.util.*;

/**

 * @Author bi xuan
 * @Date 2021/1/13 18:19
 * @Version 1.0
 */
//@Component
public class DesignerServletActionAdapter extends RenderPageServletAction {
//    @Autowired
    private ReportRender reportRender;
//    @Autowired
    private ReportParser reportParser;
    private List<ReportProvider> reportProviders=new ArrayList<ReportProvider>();
    private String fileName;
    public String getFileName() {
        return fileName;
    }

    @Override

    public void execute(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {

        String method=retriveMethod(req);

        if(method!=null){

            invokeMethod(method, req, resp);

        }else{

            VelocityContext context = new VelocityContext();

            context.put("contextPath", req.getContextPath());

            resp.setContentType("text/html");

            resp.setCharacterEncoding("utf-8");

            Template template=ve.getTemplate("ureport-html/designer.html","utf-8");

            PrintWriter writer=resp.getWriter();

            template.merge(context, writer);

            writer.close();

    public void scriptValidation(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {

        String content=req.getParameter("content");

        ANTLRInputStream antlrInputStream=new ANTLRInputStream(content);

        ReportParserLexer lexer=new ReportParserLexer(antlrInputStream);

        CommonTokenStream tokenStream=new CommonTokenStream(lexer);

        ReportParserParser parser=new ReportParserParser(tokenStream);

        ScriptErrorListener errorListener=new ScriptErrorListener();

        parser.removeErrorListeners();

        parser.addErrorListener(errorListener);

        parser.expression();

        List<ErrorInfo> infos=errorListener.getInfos();

        writeObjectToJson(resp, infos);

    public void conditionScriptValidation(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {

        String content=req.getParameter("content");

        ANTLRInputStream antlrInputStream=new ANTLRInputStream(content);

        ReportParserLexer lexer=new ReportParserLexer(antlrInputStream);

        CommonTokenStream tokenStream=new CommonTokenStream(lexer);

        ReportParserParser parser=new ReportParserParser(tokenStream);

        ScriptErrorListener errorListener=new ScriptErrorListener();

        parser.removeErrorListeners();

        parser.addErrorListener(errorListener);

        parser.expr();

        List<ErrorInfo> infos=errorListener.getInfos();

        writeObjectToJson(resp, infos);

    public void parseDatasetName(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {

        String expr=req.getParameter("expr");

        ANTLRInputStream antlrInputStream=new ANTLRInputStream(expr);

        ReportParserLexer lexer=new ReportParserLexer(antlrInputStream);

        CommonTokenStream tokenStream=new CommonTokenStream(lexer);

        ReportParserParser parser=new ReportParserParser(tokenStream);

        parser.removeErrorListeners();

        ReportParserParser.DatasetContext ctx=parser.dataset();

        String datasetName=ctx.Identifier().getText();

        Map<String,String> result=new HashMap<String,String>();

        result.put("datasetName", datasetName);

        writeObjectToJson(resp, result);

    public void savePreviewData(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {

        String content=req.getParameter("content");

        content=decodeContent(content);

        InputStream inputStream= IOUtils.toInputStream(content,"utf-8");

        ReportDefinition reportDef=reportParser.parse(inputStream,"p");

        reportRender.rebuildReportDefinition(reportDef);

        IOUtils.closeQuietly(inputStream);

        TempObjectCache.putObject(PREVIEW_KEY, reportDef);

    public void loadReport(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {

        String file=req.getParameter("file");

        if(file==null){

            throw new ReportDesignException("Report file can not be null.");

        //备注file不能修改，调试源码时发现这个loadReport被调用了两次，第一次是加载整个报表界面使用，第二次是加载报表列表使用,改了就会报错

        file= ReportUtils.decodeFileName(file);

        this.fileName = file;

//        this.fileName = this.fileName.replace("file:","").split(".")[0];

        this.fileName = this.fileName.replace("file:","").split("\\.")[0];

        Object obj=TempObjectCache.getObject(file);

        if(obj!=null && obj instanceof ReportDefinition){

            ReportDefinition reportDef=(ReportDefinition)obj;

            TempObjectCache.removeObject(file);

            writeObjectToJson(resp, new ReportDefinitionWrapper(reportDef));

        }else{

            ReportDefinition reportDef=reportRender.parseReport(file);

            writeObjectToJson(resp, new ReportDefinitionWrapper(reportDef));

    public void deleteReportFile(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {

        String file=req.getParameter("file");

        if(file==null){

            throw new ReportDesignException("Report file can not be null.");

        ReportProvider targetReportProvider=null;

        for(ReportProvider provider:reportProviders){

            if(file.startsWith(provider.getPrefix())){

                targetReportProvider=provider;

                break;

        if(targetReportProvider==null){

            throw new ReportDesignException("File ["+file+"] not found available report provider.");

        targetReportProvider.deleteReport(file);

    public void saveReportFile(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {

        String file=req.getParameter("file");

        file=ReportUtils.decodeFileName(file);

        String content=req.getParameter("content");

        content=decodeContent(content);

        ReportProvider targetReportProvider=null;

        for(ReportProvider provider:reportProviders){

            if(file.startsWith(provider.getPrefix())){

                targetReportProvider=provider;

                break;

        if(targetReportProvider==null){

            throw new ReportDesignException("File ["+file+"] not found available report provider.");

        targetReportProvider.saveReport(file, content);

        InputStream inputStream=IOUtils.toInputStream(content,"utf-8");

        ReportDefinition reportDef=reportParser.parse(inputStream, file);

        reportRender.rebuildReportDefinition(reportDef);

        CacheUtils.cacheReportDefinition(file, reportDef);

        IOUtils.closeQuietly(inputStream);

    public void loadReportProviders(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {

        writeObjectToJson(resp, reportProviders);

    public void setReportRender(ReportRender reportRender) {

        this.reportRender = reportRender;

    public void setReportParser(ReportParser reportParser) {

        this.reportParser = reportParser;

    @Override

    public void setApplicationContext(ApplicationContext applicationContext)throws BeansException {

        super.setApplicationContext(applicationContext);

        Collection<ReportProvider> providers=applicationContext.getBeansOfType(ReportProvider.class).values();

        for(ReportProvider provider:providers){

            if(provider.disabled() || provider.getName()==null){

                continue;

            reportProviders.add(provider);

    @Override

    public String url() {

        return "/designer";

然后修改自己的xml

    <bean id="ureport.DesignerServletAction" class="com.sf.energy.nplatform.report.adapter.DesignerServletActionAdapter">

        <property name="reportRender" ref="ureport.reportRender"></property>

        <property name="reportParser" ref="ureport.reportParser"></property>

    </bean>

哈哈，你可能发现这不是一模一样吗？

其实我厚着脸皮承认其实都是我工作老大给的思路，

接下来是前方高能：作者自己的思路

因为我才毕业半年，在我接触到Java时就是springboot了，我不喜欢xml文件，所以我要用注解

image.png

xml注释掉

image.png

抱着好奇的心态run了一下，可以，这时开始头脑一片问号

@Autowired注解是根据byType进行加载的

这明显我的type是DesignerServletActionAdapter，jar包的是DesignServletAction，这类型都不同，是怎么替换的啊！

我决定查看调用栈一探究竟

image.png

没错。他是根据url这个方法来获取类的！(其实这里还是有一个疑惑，因为我重写的类的方法返回的还是/desinger,难到是因为我写的优先级方法高吗？)

image.png

判断url的源码为：

/*******************************************************************************

 * Copyright 2017 Bstek
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License.  You may obtain a copy
 * of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
 * License for the specific language governing permissions and limitations under
 * the License.
 ******************************************************************************/
package com.bstek.ureport.console;

import java.io.IOException;

import java.io.PrintWriter;

import java.util.Collection;

import java.util.HashMap;

import java.util.Map;

import javax.servlet.ServletConfig;

import javax.servlet.ServletException;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import org.apache.commons.lang.StringUtils;

import org.springframework.web.context.WebApplicationContext;

import org.springframework.web.context.support.WebApplicationContextUtils;

/**

 * @author Jacky.gao
 * @since 2017年1月25日
 */
public class UReportServlet extends HttpServlet {
    private static final long serialVersionUID = 533049461276487971L;
    public static final String URL = "/ureport";
    private Map<String, ServletAction> actionMap = new HashMap<String, ServletAction>();

    @Override

    public void init(ServletConfig config) throws ServletException {

        super.init(config);

        WebApplicationContext applicationContext = getWebApplicationContext(config);

        Collection<ServletAction> handlers = applicationContext.getBeansOfType(ServletAction.class).values();

        for (ServletAction handler : handlers) {

            String url = handler.url();

            if (actionMap.containsKey(url)) {

                throw new RuntimeException("Handler [" + url + "] already exist.");

            actionMap.put(url, handler);

    protected WebApplicationContext getWebApplicationContext(ServletConfig config){

        return WebApplicationContextUtils.getWebApplicationContext(config.getServletContext());

    @Override

    protected void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {

        String path = req.getContextPath() + URL;

        String uri = req.getRequestURI();

        String targetUrl = uri.substring(path.length());

        if (targetUrl.length() < 1) {

            outContent(resp, "Welcome to use ureport,please specify target url.");

            return;

        int slashPos = targetUrl.indexOf("/", 1);

        if (slashPos > -1) {

            targetUrl = targetUrl.substring(0, slashPos);

        ServletAction targetHandler = actionMap.get(targetUrl);

        if (targetHandler == null) {

            outContent(resp, "Handler [" + targetUrl + "] not exist.");

            return;

        RequestHolder.setRequest(req);

        try{

            targetHandler.execute(req, resp);

        }catch(Exception ex){

            resp.setCharacterEncoding("UTF-8");

            PrintWriter pw=resp.getWriter();

            Throwable e=buildRootException(ex);

            resp.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);

            String errorMsg = e.getMessage();

            if(StringUtils.isBlank(errorMsg)){

                errorMsg=e.getClass().getName();

            pw.write(errorMsg);

            pw.close();

            throw new ServletException(ex);

        }finally{

            RequestHolder.clean();

    private Throwable buildRootException(Throwable throwable){

        if(throwable.getCause()==null){

            return throwable;

        return buildRootException(throwable.getCause());

    private void outContent(HttpServletResponse resp, String msg) throws IOException {

        resp.setContentType("text/html");

        PrintWriter pw = resp.getWriter();

        pw.write("<html>");

        pw.write("<header><title>UReport Console</title></header>");

        pw.write("<body>");

        pw.write(msg);

        pw.write("</body>");

        pw.write("</html>");

        pw.flush();

        pw.close();

原创声明：本文系作者授权腾讯云开发者社区发表，未经许可，不得转载。

如有侵权，请联系 cloudcommunity@tencent.com 删除。

xml

原创声明：本文系作者授权腾讯云开发者社区发表，未经许可，不得转载。

如有侵权，请联系 cloudcommunity@tencent.com 删除。