我转载了CSDN一篇5万+访问量的文章

import java.io.File;
import java.io.FileOutputStream;
import java.lang.reflect.Field;
import java.util.ArrayList;
import java.util.List;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;


/**
 * sql自动生成
 * @author 
 * @date 2018年4月11日
 */
public class SqlGenerator {
  private static final Logger logger = LoggerFactory.getLogger(SqlGenerator.class);
  
  public static void main(String[] args) {
    //实体类所在的package在磁盘上的绝对路径
    String packageName = "E:/report";
    //生成sql的文件夹
    String filePath = "E:/create/";
    //项目中实体类的路径
    String prefix = "com.example.entity.";
    String className = "";

    StringBuffer sqls = new StringBuffer();
    //获取包下的所有类名称
    List<String> list = getAllClasses(packageName);
    for (String str : list) {
      className = prefix + str.substring(0, str.lastIndexOf("."));
      String sql = generateSql(className, filePath);
      sqls.append(sql);
    }
    System.out.println(sqls.toString());
    StringToSql(sqls.toString(), filePath + "report.sql");

  }
  /**
   * 根据实体类生成建表语句
   * @author  
   * @date  2018年4月11日
   * @param className 全类名  
   * @param filePath 磁盘路径  如 : d:/workspace/
   */
  public static String generateSql(String className,String filePath){
    try {
      Class<?> clz = Class.forName(className);
      className = clz.getSimpleName();
      Field[] fields = clz.getDeclaredFields();
      StringBuffer column = new StringBuffer();
      String varchar = " varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci DEFAULT NULL,";
      for (Field f : fields) {
        column.append(" \n `"+f.getName()+"`").append(varchar);
      }
      StringBuffer sql = new StringBuffer();
      sql.append("\n DROP TABLE IF EXISTS `"+className+"`; ")
        .append(" \n CREATE TABLE `"+className+"`  (")
        .append(" \n `id` int(11) NOT NULL AUTO_INCREMENT,")
        .append(" \n "+column)
        .append(" \n PRIMARY KEY (`id`) USING BTREE,")
        .append("\n INDEX `id`(`id`) USING BTREE")
        .append(" \n ) ENGINE = InnoDB AUTO_INCREMENT = 1 CHARACTER SET = utf8 COLLATE = utf8_general_ci;");
      return sql.toString();
    } catch (ClassNotFoundException e) {
      logger.debug("该类未找到！");
      return null;
    }
    
  }
  
  /**
   * 获取包下的所有类名称,获取的结果类似于 XXX.java
   * @author  
   * @date  2018年4月11日
   * @param packageName
   * @return
   */
  public static List<String> getAllClasses(String packageName){
    List<String> classList = new ArrayList<String>();
    String className="";
    File f = new File(packageName);
    if(f.exists() && f.isDirectory()){
      File[] files = f.listFiles();
      for (File file : files) {
         className = file.getName();
         classList.add(className);
      }
      return classList;
    }else{
      logger.debug("包路径未找到！");
      return null;
    }
  }
  /**
   * 将string 写入sql文件
   * @author  
   * @date  2018年4月11日
   * @param str
   * @param path
   */
  public static void StringToSql(String str,String path){
    byte[] sourceByte = str.getBytes();  
    if(null != sourceByte){  
        try {  
            File file = new File(path);     //文件路径（路径+文件名）  
            if (!file.exists()) {   //文件不存在则创建文件，先创建目录  
                File dir = new File(file.getParent());  
                dir.mkdirs();  
                file.createNewFile();  
            }  
            FileOutputStream outStream = new FileOutputStream(file);    //文件输出流用于将数据写入文件  
            outStream.write(sourceByte);  
            outStream.flush();
            outStream.close();  //关闭文件输出流  
            System.out.println("生成成功");
        } catch (Exception e) {  
          e.printStackTrace();
        }  
    }  
  }
}

//实体类所在的package在磁盘上的绝对路径
//绝对路径一定要书写到根目录否则读取不到String packageName = "F:\\Subversion\\main\\java\\com\\project\\system\\dept\\domain";
//生成sql的文件夹
String filePath = "F:\\upload";
//项目中实体类的路径，以点结尾String prefix = "com.system.dept.domain.";
String className = "Dept.java";

<label class="checkbox-inline i-checks"  th:each="data : ${list}">  
    <input th:attr="checked=${methodService.contains(data.id,proofsList)?true:false}" type="checkbox" name="proofs[]"  th:value="${data.id}" id="inlineCheckbox1" />
</lable>

public class MethodService {
 
    public boolean contains(String id,List<Proof> proofs){
        System.out.println(proofs);
        List<String> ids = new ArrayList<>();
        for(Proof p: proofs){
           ids.add(p.getId());
        }
        return (ids.contains(id));
    }
}

MethodService md = new MethodService();
 mmap.put("methodService",md);
 mmap.put("proofsList",proofsList);