java 路径

获取java路径的方法，类路径，工程路径，和创建文件

 

package com.pingan.ff.gw;


import org.junit.Test;

import java.io.File;
import java.io.IOException;

public class PathTest {

    @Test
    public void pathTest() throws IOException {
        System.out.println("user.dir:" + System.getProperty("user.dir"));
        File directory = new File(".");
        System.out.println("directory.getCanonicalPath():" + directory.getCanonicalPath());
        System.out.println("directory.getAbsolutePath():"+ directory.getAbsolutePath());

        System.out.println("this.getClass().getResource(\"/\").getPath():"+ this.getClass().getResource("/").getPath()+"../../pathtest");
        String mockDir = this.getClass().getResource("/").getPath()+"../../pathtest/";
        File testFile = new File(mockDir+"testfile.txt");
        if(!testFile.exists()){
            if(!testFile.getParentFile().exists()){
                testFile.getParentFile().mkdirs();
            }
            testFile.createNewFile();
        }

        System.out.println("this.getClass().getResource(\"\").getPath():"+ this.getClass().getResource("").getPath());
        System.out.println("this.getClass().getClassLoader().getResource(\"\"):"+ this.getClass().getClassLoader().getResource(""));
        System.out.println("System.getProperty(\"java.class.path\"):" + System.getProperty("java.class.path"));
    }
}