java AST 抽象语法树-JavaParser 实际使用

老马啸西风2020年5月29日小于 1 分钟

简单使用

maven 引入


    com.github.javaparser
    javaparser-symbol-solver-core
    3.15.21



    com.github.javaparser
    javaparser-core
    3.15.21

ps: 需要设置 jdk 级别为 1.8

测试代码

测试类

package com.github.houbb;

public class Main {

    public static void main(String[] args) {
        System.out.println("main");
    }

}

输出方法名称

package com.github.houbb;

import com.github.javaparser.JavaParser;
import com.github.javaparser.StaticJavaParser;
import com.github.javaparser.ast.CompilationUnit;
import com.github.javaparser.ast.body.MethodDeclaration;
import com.github.javaparser.ast.visitor.VoidVisitorAdapter;
import jdk.internal.org.objectweb.asm.MethodVisitor;

import java.io.FileInputStream;
import java.io.FileNotFoundException;

public class MainMethodAccess {

    public static void main(String[] args) throws FileNotFoundException {
        // creates an input stream for the file to be parsed
        FileInputStream in = new FileInputStream("D:\\github_other\\javaparser-maven-sample\\src\\main\\java\\com\\github\\houbb\\Main.java");

        CompilationUnit cu = StaticJavaParser.parse(in);

        // visit and print the methods names
        new MethodVisitor().visit(cu, null);
    }

    /**
     * Simple visitor implementation for visiting MethodDeclaration nodes.
     */
    private static class MethodVisitor extends VoidVisitorAdapter {
        @Override
        public void visit(MethodDeclaration n, Object arg) {
            // here you can access the attributes of the method.
            // this method will be called for all methods in this
            // CompilationUnit, including inner class methods
            System.out.println(n.getName());
        }
    }

}