【qdox】Java 代码解析利器 QDox

        // 创建 java 项目 builder 对象
        JavaProjectBuilder javaProjectBuilder = new JavaProjectBuilder();

        // 添加 java 源文件
        javaProjectBuilder.addSource(new File("/Users/kiwi/study/code/study-example/study-qdox-example/src/main/java/cn/coder4j/study/example/qdox/Demo.java"));

        // 获得解析后的类
        Collection<JavaClass> classes = javaProjectBuilder.getClasses();
        for (JavaClass javaClass : classes) {
            
        }

package com.thoughtworks.qdox.model;

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.
 */

import java.util.List;

import com.thoughtworks.qdox.library.ClassLibrary;

/**
 * Equivalent of {@link java.lang.Class}, providing the most important methods.
 * Where the original Class is using an Array, this model is using a List.
 * 
 * @author Robert Scholte
 */
public interface JavaClass extends JavaModel, JavaType, JavaAnnotatedElement, JavaGenericDeclaration
{
    /**
     * The compilation unit, which includes the imports, the public and anonymous classes
     * 
     * @return the {@link JavaSource} of this element
     */
    JavaSource getSource();

    /**
     * (API description of {@link java.lang.Class#isInterface()})
     * <p>
     * Determines if the specified <code>Class</code> object represents an interface type.
     * </p>
     * 
     * @return <code>true</code> if this object represents an interface, otherwise <code>false</code>
     */
    boolean isInterface();

    /**
     * (API description of {@link java.lang.Class#isEnum()})
     * <p>
     * Returns <code>true</code> if and only if this class was declared as an enum in the source code.
     * </p>
     * 
     * @return <code>true</code> if this object represents an enum, otherwise <code>false</code>

     */
    boolean isEnum();

    /**
     * (API description of {@link java.lang.Class#isAnnotation()})
     * <p>Returns true if this <code>Class</code> object represents an annotation type. 
     *    Note that if this method returns true, {@link #isInterface()} would also return true, as all annotation types are also interfaces.
     * </p>
     * 
     * @return <code>true</code> if this object represents an annotation, otherwise <code>false</code>
     * @since 2.0 
     */
    boolean isAnnotation();
    
    JavaClass getDeclaringClass();

    JavaType getSuperClass();

    /**
     * Shorthand for getSuperClass().getJavaClass() with null checking.
     * @return the super class as {@link JavaClass}
     */
    JavaClass getSuperJavaClass();

    List<JavaType> getImplements();

    /**
     * Equivalent of {@link java.lang.Class#getInterfaces()}
     *  Determines the interfaces implemented by the class or interface represented by this object. 
     * 
     * @return a list of interfaces, never <code>null</code>
     * @since 2.0
     */
    List<JavaClass> getInterfaces();

    String getCodeBlock();

    JavaSource getParentSource();

    /**
     * Equivalent of {@link java.lang.Class#getPackage()}
     * @return the package
     */
    JavaPackage getPackage();

    /**
     * If this class has a package, the packagename will be returned.
     * Otherwise an empty String.
     * 
     * @return the name of the package, otherwise an empty String
     */
    String getPackageName();

    /**
     * @since 1.3
     * @return <code>true</code> if this class is an inner class, otherwise <code>false</code>
     */
    boolean isInner();

    /**
     * Equivalent of {@link java.lang.Class#getMethods()}
     * 
     * @return the methods declared or overridden in this class
     */
    List<JavaMethod> getMethods();
    
    /**
     * Equivalent of {@link java.lang.Class#getConstructors()}
     * 
     * @return the list of constructors
     * @since 2.0
     */
    List<JavaConstructor> getConstructors();
    
    
    /**
     * 
     * @param parameterTypes the parameter types of the constructor, can be <code>null</code>
     * @return the matching constructor, otherwise <code>null</code>
     * @since 2.0
     */
    JavaConstructor getConstructor(List<JavaType> parameterTypes);
    
    /**
     * 
     * @param parameterTypes the parameter types of the constructor, can be <code>null</code>
     * @param varArg define is the constructor has varArgs
     * @return the matching constructor, otherwise <code>null</code>
     * @since 2.0
     */
    JavaConstructor getConstructor(List<JavaType> parameterTypes, boolean varArg);
    

    /**
     * Return declared methods and optionally the inherited methods
     *
     * @param superclasses {@code true} if inherited methods should be returned as well 
     * @return all methods
     * @since 1.3
     */
    List<JavaMethod> getMethods( boolean superclasses );

    /**
     * 
     * @param name the name of the method
     * @param parameterTypes the parameter types of the method, can be <code>null</code>.
     * @return the matching method, otherwise <code>null</code>
     */
    JavaMethod getMethodBySignature( String name, List<JavaType> parameterTypes );

    /**
     * This should be the signature for getMethodBySignature.
     * 
     * @param name the name of the method
     * @param parameterTypes the parameter types of the method, can be {@code null}
     * @param varArgs define if the method has varArgs
     * @return the matching method, otherwise  {@code null}
     */
    JavaMethod getMethod( String name, List<JavaType> parameterTypes, boolean varArgs );

    /**
     * 
     * @param name the name of the method
     * @param parameterTypes the parameter types of the method, can be  {@code null}
     * @param superclasses to define if superclasses should be included as well
     * @return the matching method, otherwise  {@code null}
     */
    JavaMethod getMethodBySignature( String name, List<JavaType> parameterTypes, boolean superclasses );

    /**
     * 
     * @param name the name of the method
     * @param parameterTypes the parameter types of the method, can be  {@code null}
     * @param superclasses {@code true} if inherited methods should be matched as well
     * @param varArg define if the method has varArgs
     * @return the matching method, otherwise  {@code null}
     */
    JavaMethod getMethodBySignature( String name, List<JavaType> parameterTypes, boolean superclasses, boolean varArg );

    /**
     * 
     * @param name the name of the method
     * @param parameterTypes the parameter types of the method, can be  {@code null}
     * @param superclasses {@code true} if inherited methods should be matched as well
     * @return the matching methods, otherwise  {@code null}
     */
    List<JavaMethod> getMethodsBySignature( String name, List<JavaType> parameterTypes, boolean superclasses );

    /**
     * 
     * @param name the name of the method
     * @param parameterTypes the parameter types of the method, can be  {@code null}
     * @param superclasses {@code true} if inherited methods should be matched as well
     * @param varArg define if the method has varArgs
     * @return the matching methods, otherwise  {@code null}
     */
    List<JavaMethod> getMethodsBySignature( String name, List<JavaType> parameterTypes, boolean superclasses,
                                                   boolean varArg );

    /**
     * Equivalent of {@link java.lang.Class#getFields()}
     * 
     * @return a list of fiels, never  {@code null}
     */
    List<JavaField> getFields();

    /**
     * Equivalent of {@link java.lang.Class#getField(String)}, where this method can resolve every field
     * 
     * @param name the name of the field
     * @return the field
     */
    JavaField getFieldByName( String name );
    
    /**
     * Based on {@link java.lang.Class#getEnumConstants()}.
     *  
     * 
     * @return a List of enum constants if this class is an <code>enum</code>, otherwise  {@code null}
     */
    List<JavaField> getEnumConstants();

    /**
     * 
     * @param name the name of the enum constant
     * @return the enumConstant matching the {@code name}, otherwise <code>null</code>
     */
    JavaField getEnumConstantByName( String name );

    /**
     * Equivalent of {@link Class#getDeclaredClasses()}
     * 
     * @return a list of declared classes, never <code>null</code>
     * @since 1.3
     */
    List<JavaClass> getNestedClasses();

    JavaClass getNestedClassByName( String name );

    /**
     * @param fullyQualifiedName the FQN to match with
     * @return {@code true} if this is of type FQN, otherwise {@code false}
     * @since 1.3
     */
    boolean isA( String fullyQualifiedName );

    /**
     * @param javaClass the JavaClass to match with
     * @return {@code true} if this is of type {@literal javaClass}, otherwise {@code false}
     * @since 1.3
     */
    boolean isA( JavaClass javaClass );

    /**
     * Returns the depth of this array, 0 if it's not an array
     * 
     * @return The depth of this array, at least <code>0</code>
     * @since 2.0
     */
    int getDimensions();
    
    /**
     * 
     * @return <code>true</code> if this JavaClass is an array, otherwise <code>false</code>
     * @since 2.0
     */
    boolean isArray();
    
    /**
     * 
     * @return <code>true</code> if this JavaClass is a void, otherwise <code>false</code>
     * @since 2.0 (was part of Type since 1.6)
     */
    boolean isVoid();
    
    /**
     * Equivalent of {@link Class#getComponentType()}
     * If this type is an array, return its component type
     * 
     * @return the type of array if it's one, otherwise <code>null</code>
     */
    JavaClass getComponentType();

    /**
     * Gets bean properties without looking in superclasses or interfaces.
     *
     * @return the bean properties
     * @since 1.3
     */
    List<BeanProperty> getBeanProperties();

    /**
     * 
     * @param superclasses to define if superclasses should be included as well
     * @return the bean properties
     * @since 1.3
     */
    List<BeanProperty> getBeanProperties( boolean superclasses );

    /**
     * Gets bean property without looking in superclasses or interfaces.
     *
     * @param propertyName the name of the property
     * @return the bean property
     * @since 1.3
     */
    BeanProperty getBeanProperty( String propertyName );

    /**
     * @param propertyName the name of the property
     * @param superclasses to define if superclasses should be included as well
     * @return the bean property
     * @since 1.3
     */
    BeanProperty getBeanProperty( String propertyName, boolean superclasses );

    /**
     * Equivalent of {@link Class#getClasses()}
     * Gets the known derived classes. That is, subclasses or implementing classes.
     * @return the derived classes
     */
    List<JavaClass> getDerivedClasses();

    List<DocletTag> getTagsByName( String name, boolean superclasses );

    ClassLibrary getJavaClassLibrary();
    
    /**
     * A list if {@link JavaInitializer}, either static or instance initializers.  
     * 
     * @return a List of initializers
     */
    List<JavaInitializer> getInitializers();

    /**
     * Equivalent of {@link java.lang.Class#getName()}.
     * 
     * @return the name of the entity (class, interface, array class, primitive type, or void) represented by this Class object, as a String.
     */
    String getName();
    
    /**
     * Equivalent of {@link java.lang.Class#getSimpleName()}.
     * 
     * @return the simple name of the underlying class as given in the source code.
     * @since 2.0
     */
    String getSimpleName();
    
    /**
     * Equivalent of {@link Class#getModifiers()}
     * 
     * <strong>This does not follow the java-api</strong>
     * The Class.getModifiers() returns an <code>int</code>, which should be decoded with the {@link java.lang.reflect.Modifier}.
     * This method will return a list of strings representing the modifiers.
     * If this member was extracted from a source, it will keep its order. 
     * Otherwise if will be in the preferred order of the java-api.
     * 
     * @return all modifiers is this member
     */
    List<String> getModifiers();
    
    /**
     * (API description of {@link java.lang.reflect.Modifier#isPublic(int)})
     * <p>
     * Return <code>true</code> if the class includes the public modifier, <code>false</code> otherwise.
     * <p>
     * 
     * @return <code>true</code> if class has the public modifier, otherwise <code>false</code>
     */
    boolean isPublic();
    
    /**
     * (API description of {@link java.lang.reflect.Modifier#isProtected(int)})
     * <p>
     * Return <code>true</code> if the class includes the protected modifier, <code>false</code> otherwise.
     * </p>
     * 
     * @return <code>true</code> if class has the protected modifier, otherwise <code>false</code>
     */
    boolean isProtected();
    
    /**
     * (API description of {@link java.lang.reflect.Modifier#isPrivate(int)})
     * <p>
     * Return <code>true</code> if the class includes the private modifier, <code>false</code> otherwise.
     * </p>
     * 
     * @return <code>true</code> if class has the private modifier, otherwise <code>false</code>
     */
    boolean isPrivate();
    
    /**
     * (API description of {@link java.lang.reflect.Modifier#isFinal(int)})
     * <p>
     * Return <code>true</code> if the class includes the final modifier, <code>false</code> otherwise.
     * </p>
     * 
     * @return <code>true</code> if class has the final modifier, otherwise <code>false</code>
     */
    boolean isFinal();
    
    /**
     * (API description of {@link java.lang.reflect.Modifier#isStatic(int)})
     * <p>
     * Return <code>true</code> if the class includes the static modifier, <code>false</code> otherwise.
     * </p>
     * 
     * @return <code>true</code> if class the static modifier, otherwise <code>false</code>
     */
    boolean isStatic();
    
    /**
     * (API description of {@link java.lang.reflect.Modifier#isAbstract(int)})
     * 
     * Return <code>true</code> if the class includes the abstract modifier, <code>false</code> otherwise.
     * 
     * @return <code>true</code> if class has the abstract modifier, otherwise <code>false</code>
     */
    boolean isAbstract();
    
    /**
     *  Equivalent of  {@link java.lang.Class#isPrimitive()}
     *  
     * @return <code>true</code> if this class represents a primitive, otherwise <code>false</code>
     */
    boolean isPrimitive();
    
    /**
     * (API description of {@link java.lang.Class#toString()})
     * 
     * Converts the object to a string. 
     * The string representation is the string "class" or "interface", followed by a space, and then by the fully qualified name of the class in the format returned by <code>getName</code>. 
     * If this <code>Class</code> object represents a primitive type, this method returns the name of the primitive type. 
     * If this <code>Class</code> object represents void this method returns "void".
     *  
     * @return a string representation of this class object.
     */
    @Override
    String toString();
}

// 这些方法名，其实也是用 QDox 打印出来的
getBeanProperties
getBeanProperty
getCodeBlock
getComponentType
getConstructor
getConstructors
getDeclaringClass
getDerivedClasses
getDimensions
getEnumConstantByName
getEnumConstants
getFieldByName
getFields
getImplements
getInitializers
getInterfaces
getJavaClassLibrary
getMethod
getMethodBySignature
getMethods
getMethodsBySignature
getModifiers
getName
getNestedClassByName
getNestedClasses
getPackage
getPackageName
getParentSource
getSimpleName
getSource
getSuperClass
getSuperJavaClass
getTagsByName
isA
isAbstract
isAnnotation
isArray
isEnum
isFinal
isInner
isInterface
isPrimitive
isPrivate
isProtected
isPublic
isStatic
isVoid

/*
 *
 *  * *
 *  *  * blog.coder4j.cn
 *  *  * Copyright (C) 2016-2020 All Rights Reserved.
 *  *
 *
 */
package cn.coder4j.study.example.qdox;

import com.thoughtworks.qdox.JavaProjectBuilder;
import com.thoughtworks.qdox.model.JavaClass;
import com.thoughtworks.qdox.model.JavaMethod;

import java.io.File;
import java.io.IOException;
import java.util.Collection;
import java.util.List;
import java.util.stream.Collectors;

/**
 * @author buhao
 * @version DemoParser.java, v 0.1 2020-03-22 19:03 buhao
 */
public class DemoParser {
    public static void main(String[] args) throws IOException {
        // 创建 java 项目 builder 对象
        JavaProjectBuilder javaProjectBuilder = new JavaProjectBuilder();
        // 添加 java 源文件
        javaProjectBuilder.addSource(new File("/Users/kiwi/study/code/study-example/study-qdox-example/src/main/java/cn/coder4j/study/example/qdox/Demo.java"));
        // 获得解析后的类
        Collection<JavaClass> classes = javaProjectBuilder.getClasses();
        for (JavaClass javaClass : classes) {
            // 打印类相关信息
            System.out.println("类名:" + javaClass.getName());
            System.out.println("实现了哪些类：" + javaClass.getImplements());
            System.out.println("继承哪个类：" + javaClass.getSuperJavaClass());
            System.out.println("注释：" + javaClass.getComment());
            // 获得方法列表
            List<JavaMethod> methods = javaClass.getMethods();
            for (JavaMethod method : methods) {
                System.out.println("方法名是：" + method.getName());
                System.out.println("方法的 Tags 有哪些：" + method.getTags().stream().map(it -> it.getName() + "->"+ it.getValue()).collect(Collectors.joining("\n")));
                System.out.println("方法的参数有哪些：" + method.getParameters());
                System.out.println("方法的返回值有哪些：" + method.getReturns());
            }
        }
    }
}

类名:Demo
实现了哪些类：[java.io.Serializable]
继承哪个类：class java.lang.Object
注释：这是一个 demo 类
方法名是：hello
方法的 Tags 有哪些：param->name 姓名
return->hello {name}
方法的参数有哪些：[String name]
方法的返回值有哪些：java.lang.String