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参考视频:https://www.bilibili.com/video/BV1WX4y1K7Lf?p=42&vd_source=8a97a93caad7a94090d3afb6a8de7574

sfa

OOP:Object Oriented Programming
面向对象编程

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package com.lianxin.test;

/**

• Description:
• 记一次java.lang.NoSuchMethodError（Jar包冲突）问题解决的方法
• https://blog.csdn.net/wzw114/article/details/117423495
• @author: N
• @Date: 2021/12/21 17:19
  */

import java.io.IOException;
import java.security.CodeSource;
import java.security.ProtectionDomain;
import java.util.Enumeration;
import java.util.jar.JarEntry;
import java.util.jar.JarFile;

public class JarFind {

public static void main(String[] args) {
    String PakageString = "org.openxmlformats.schemas.wordprocessingml.x2006.main.CTTblWidth";
    GetFilePathByPackage(PakageString);
    System.out.println("\r\n");
    // 获取Class路径
    String alljar = System.getProperty("java.class.path");
    String[] alljarpath = alljar.split(";");
    // 根据路径遍历，该路径下的Jar包是否有该包,有就打印
    for (String jarpath : alljarpath) {
        if (jarpath.contains("jar")) {
            String[] jar = new String[2];
            jar[0] = jarpath;
            jar[1] = PakageString;
            getClassNameByJarAndPackage(jar);
        }
    }
}

/**
 * 根据类名打印JVM加载的类对应的Jar包路径，如GetFilePathByPackage("java.util")。
 *
 * @param PakageString 类名
 */
public static void GetFilePathByPackage(String PakageString) {
    System.out.println("查找的类：" + PakageString);

    try {
        Class<?> c = Class.forName(PakageString);
        ProtectionDomain pd = c.getProtectionDomain();
        CodeSource cs = pd.getCodeSource();
        System.out.println("加载的类对应的路径：" + cs.getLocation().toString());
    } catch (ClassNotFoundException e) {
        e.printStackTrace();
    }

}

/**
 * 根据jar包路径和包名来查询jar包中是否含有有关类
 *
 * @param jar jar[0] jar路径 jar[1] 包名
 */
@SuppressWarnings("resource")
public static void getClassNameByJarAndPackage(String[] jar) {
    String jarFilePath = jar[0];
    String packagePath = jar[1].replace(".", "/");
    try {
        JarFile jarFile = new JarFile(jarFilePath);
        Enumeration<JarEntry> entrys = jarFile.entries();
        while (entrys.hasMoreElements()) {
            JarEntry jarEntry = entrys.nextElement();
            String entryName = jarEntry.getName();
            if (entryName.equals(packagePath + ".class")) {
                System.out.println("类路径：" + entryName + "\r\n" + "jar包的路径：" + jarFilePath);
            }
        }
    } catch (IOException e) {
        e.printStackTrace();
    }
}

}

https://blog.csdn.net/wzw114/article/details/117423495

java类

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