java中获取项目路径

package com.demo;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration;
import org.springframework.boot.autoconfigure.orm.jpa.HibernateJpaAutoConfiguration;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

import java.io.File;


@SpringBootApplication(exclude = {DataSourceAutoConfiguration.class, HibernateJpaAutoConfiguration.class})
@RestController
public class Application {
    
    public static void main(String[] args) {
        SpringApplication.run(Application.class,args);
    }
    
    @GetMapping("/lujing")
    public void getLujing() throws Exception{
        //当前项目下路径
        File file = new File("");
        String filePath = file.getCanonicalPath();
        System.out.println(filePath);

        //当前项目下xml文件夹
        File file1 = new File("");
        String filePath1 = file1.getCanonicalPath()+File.separator+"xml\\";
        System.out.println(filePath1);

        //获取类加载的根路径
        File file3 = new File(this.getClass().getResource("/").getPath());
        System.out.println(file3);

        //获取当前类的所在工程路径
        File file4 = new File(this.getClass().getResource("").getPath());
        System.out.println(file4);

        //获取所有的类路径 包括jar包的路径
        System.out.println(System.getProperty("java.class.path"));
    }
}

　　项目结构：

　　输出结果：

1.当前项目下路径E:\Work\example

2.当前项目下xml文件夹E:\Work\example\xml

3.获取类加载的根路径E:\Work\example\out\production\classes

4.获取当前类的所在工程路径E:\Work\example\out\production\classes\com\demo

5.获取所有的类路径 包括jar包的路径D:\Java\jdk1.8.0_65\jre\lib\charsets.jar;D:\Java\jdk1.8.0_65\jre\lib\deploy.jar;D:\Java\jdk1.8.0_65\jre\lib\ext\access-bridge-64.jar;D:\Java\jdk1.8.0_65\jre\lib\ext\cldrdata.jar;D:\Java\jdk1.8.0_65\jre\lib\ext\dnsns.jar;D:\Java\jdk1.8.0_65\jre\lib\ext\jaccess.jar;D:\Java\jdk1.8.0_65\jre\lib\ext\jfxrt.jar;D:\Java\jdk1.8.0_65\jre\lib\ext\localedata.jar;D:\Java\jdk1.8.0_65\jre\lib\ext\nashorn.jar;D:\Java\jdk1.8.0_65\jre\lib\ext\sunec.jar;D:\Java\jdk1.8.0_65\jre\lib\ext\sunjce_provider.jar;D:\Java\jdk1.8.0_65\jre\lib\ext\sunmscapi.jar;D:\Java\jdk1.8.0_65\jre\lib\ext\sunpkcs11.jar;D:\Java\jdk1.8.0_65\jre\lib\ext\zipfs.jar;D:\Java\jdk1.8.0_65\jre\lib\javaws.jar;D:\Java\jdk1.8.0_65\jre\lib\jce.jar;D:\Java\jdk1.8.0_65\jre\lib\jfr.jar;D:\Java\jdk1.8.0_65\jre\lib\jfxswt.jar;D:\Java\jdk1.8.0_65\jre\lib\jsse.jar;D:\Java\jdk1.8.0_65\jre\lib\management-agent.jar;D:\Java\jdk1.8.0_65\jre\lib\plugin.jar;D:\Java\jdk1.8.0_65\jre\lib\resources.jar;D:\Java\jdk1.8.0_65\jre\lib\rt.jar;E:\Work\example\out\production\classes;C:\Users\LIX\.gradle\caches\modules-2\files-2.1\org.springframework.boot\spring-boot-starter-actuator\1.5.8.RELEASE\927c40a1af518dc240dfdf7aaf0a9673c3a127c5\spring-boot-starter-actuator-1.5.8.RELEASE.jar;C:\Users\LIX\.gradle\caches\modules-2\files-2.1\org.springframework.boot\spring-boot-starter-thymeleaf\1.5.9.RELEASE\f1a07e590d7742b7c57367ba23a3c0eecb491d48\spring-boot-starter-thymeleaf-1.5.9.RELEASE.jar;C:\Users\LIX\.gradle\caches\modules-2\files-2.1\org.springframework.boot\spring-boot-starter-web\1.5.9.RELEASE\bda9733d5e6ba6d1a97deead1738713dc0631b3e\spring-boot-starter-web-1.5.9.RELEASE.jar;C:\Users\LIX\.gradle\caches\modules-2\files-2.1\org.springframework.boot\spring-boot-starter-data-jpa\1.5.9.RELEASE\8628320876aa12cc406216523effe954fbd354c0\spring-boot-starter-data-jpa-1.5.9.RELEASE.jar;C:\Users\LIX\.gradle\caches\modules-2\files-2.1\org.springframework.boot\spring-boot-starter-test\1.5.9.RELEASE\b5adf6fbf53be00b7ae52f657d564122edbe5156\spring-boot-starter-test-1.5.9.RELEASE.jar;C:\Users\LIX\.gradle\caches\modules-2\files-2.1\org.springframework.boot\spring-boot-actuator\1.5.8.RELEASE\aac530fe877ed91c92831019755c49f29b08e6\spring-boot-actuator-1.5.8.RELEASE.jar;C:\Users\LIX\.gradle\caches\modules-2\files-2.1\org.springframework\spring-webmvc\4.3.13.RELEASE\87a095c7a1d13fe433ae6712787238c1dbaa6919\spring-webmvc-4.3.13.RELEASE.jar;C:\Users\LIX\.gradle\caches\modules-2\files-2.1\org.springframework\spring-web\4.3.13.RELEASE\7cd084992d546165ede3e99bc31ee49c937f0ce7\spring-web-4.3.13.RELEASE.jar;C:\Users\LIX\.gradle\caches\modules-2\files-2.1\org.springframework.data\spring-data-jpa\1.11.9.RELEASE\64c80f12361d5b74cf98a3433b59a5c961d78d38\spring-data-jpa-1.11.9.RELEASE.jar;C:\Users\LIX\.gradle\caches\modules-2\files-2.1\org.springframework\spring-test\4.3.13.RELEASE\f4ff71b0d628d37f334d4f1f197c1b8cea364d01\spring-test-4.3.13.RELEASE.jar;C:\Users\LIX\.gradle\caches\modules-2\files-2.1\org.springframework.boot\spring-boot-starter-aop\1.5.9.RELEASE\fab419df8d7a13968a51ebfcbcad7ef320d66184\spring-boot-starter-aop-1.5.9.RELEASE.jar;C:\Users\LIX\.gradle\caches\modules-2\files-2.1\org.springframework.boot\spring-boot-test-autoconfigure\1.5.9.RELEASE\b428495e25b0531b2a977f51c5d29011c817b8ee\spring-boot-test-autoconfigure-1.5.9.RELEASE.jar;C:\Users\LIX\.gradle\caches\modules-2\files-2.1\org.springframework.boot\spring-boot-test\1.5.9.RELEASE\7e604d56325f04a8b89a280e647746fc69e5a21f\spring-boot-test-1.5.9.RELEASE.jar;C:\Users\LIX\.gradle\caches\modules-2\files-2.1\org.springframework.boot\spring-boot-starter-jdbc\1.5.9.RELEASE\6769ecea55e952afb64f17975638c5afd1e59ef3\spring-boot-starter-jdbc-1.5.9.RELEASE.jar;C:\Users\LIX\.gradle\caches\modules-2\files-2.1\org.springframework.boot\spring-boot-starter\1.5.9.RELEASE\6bfb34db2715ee86c6e2337fa145650588b4b1b3\spring-boot-starter-1.5.9.RELEASE.jar;C:\Users\LIX\.gradle\caches\modules-2\files-2.1\org.springframework.boot\spring-boot-autoconfigure\1.5.9.RELEASE\88dd18bdaf317ae40971573a051fd47265f2ed39\spring-boot-autoconfigure-1.5.9.RELEASE.jar;C:\Users\LIX\.gradle\caches\modules-2\files-2.1\org.springframework.boot\spring-boot\1.5.9.RELEASE\f472cdf948288796fb31e0bb03f6e7b022b763a0\spring-boot-1.5.9.RELEASE.jar;C:\Users\LIX\.gradle\caches\modules-2\files-2.1\org.springframework\spring-context\4.3.13.RELEASE\6ab1c189a13182fa3256f6bbc68fafdaf8f5a19e\spring-context-4.3.13.RELEASE.jar;C:\Users\LIX\.gradle\caches\modules-2\files-2.1\org.springframework\spring-aop\4.3.13.RELEASE\61f427b55951f59b50f3c2bd0de3c48960e2a342\spring-aop-4.3.13.RELEASE.jar;C:\Users\LIX\.gradle\caches\modules-2\files-2.1\org.springframework\spring-orm\4.3.13.RELEASE\382d3ce044204947f8f2b3fa67a665d4e2bd346f\spring-orm-4.3.13.RELEASE.jar;C:\Users\LIX\.gradle\caches\modules-2\files-2.1\org.springframework\spring-jdbc\4.3.13.RELEASE\68e95c2a065641559c7dab7b605bc5847ab026ad\spring-jdbc-4.3.13.RELEASE.jar;C:\Users\LIX\.gradle\caches\modules-2\files-2.1\org.springframework.data\spring-data-commons\1.13.9.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