@Test

public void classPath() {
　　 // 通过获取当前类的编译后所在的路径

    URL classPath = getClass().getResource("");

    System.out.println("classPath = " + classPath);

}

// 输出：classPath = file:/F:/etom/pmms/target/test-classes/test/

@Test

public void classRootPath() {

    URL classRootPath= getClass().getResource("/");

    System.out.println("classRootPath= " + classRootPath);

}

// classRootPath= file:/F:/etom/pmms/target/test-classes/

@Test

public void rootPath() throws IOException {

    File file = new File("");

    if (!file.exists()) {

        file.mkdirs();

    }

    String rootPath = file.getCanonicalPath();

    System.out.println("rootPath = " + rootPath);

}

// rootPath = F:\etom\pmms

@Test

public void threadPath() {
　　 // 通过线程的加载类所在的路径

    URL threadPath = Thread.currentThread().getContextClassLoader().getResource("");

    System.out.println("threadPath = " + threadPath);

}

// 输出：threadPath = file:/F:/etom/pmms/target/test-classes/

public void webPath(HttpServletRequest request) {
　　 // 通过获取web上下文来获取web的相对路径

    String webappPath = request.getServletContext().getRealPath("");

}

public void filePath() {
　　 // 直接配置文件路径即可，记住：是全路径

    File file = new File("F:/etom/pmms/target/test-classes/test/");

    if (!file.exists()) {

        file.mkdirs();

    }

}