java 绝对路径_Java获取各种绝对路径的8种方法

示例代码如下：

public class GetPath extends HttpServlet {

@Override

protected void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException {

//第1种：获取服务器二进制命令路径

String path1 = new File("").getCanonicalPath();

System.out.println("path1:" + path1);

//第2种：获取服务器二进制命令路径

String path2 = System.getProperty("user.dir");

System.out.println("path2:" + path2);

//第3种：获取项目的根目录

String path3 = getServletContext().getRealPath("");

System.out.println("path3:" + path3);

//第4种：获取项目的根目录,但Servlet2.1以后已过期

String path4 = request.getRealPath("");

System.out.println("path4:" + path4);

//第5种：获取类加载的根路径

String path5 = Thread.currentThread().getContextClassLoader().getResource("").getPath();

System.out.println("path5:" + path5);

//第6种：获取类加载的根路径

String path6 = this.getClass().getClassLoader().getResource("").getPath();

System.out.println("path6:" + path6);

//第7种：获取类加载的根路径

String path7 = this.getClass().getResource("/").getPath();

System.out.println("path7:" + path7);

//第8种：获取当前类的路径

String path8 = this.getClass().getResource("").getPath();

System.out.println("path8:" + path8);

}

}

运行结果：

path1:D:\java\apache-tomcat-8.5.37\bin

path2:D:\java\apache-tomcat-8.5.37\bin

path3:D:\ROOT\

path4:D:\ROOT\

path5:/D:/ROOT/WEB-INF/classes/

path6:/D:/ROOT/WEB-INF/classes/

path7:/D:/ROOT/WEB-INF/classes/

path8:/D:/ROOT/WEB-INF/classes/com/gqzzw/