Java WEB项目中获取路径方法

java中获取路径

在java中获取当前项目的路径信息

	public class BasePath {
	
    public static void main(String[] args) throws URISyntaxException {
        //1、来获得当前线程的ClassLoader相应的资源路径
        String url = Thread.currentThread().getContextClassLoader().getResource("").toURI().getPath();
        System.out.println("url:"+url);
        //2、指定类的ClassLoader相应的资源路径
        String url2 = BasePath.class.getClassLoader().getResource("").toURI().getPath();
        System.out.println("url2:"+url2);

        String url3 = ClassLoader.getSystemResource("").toURI().getPath();
        System.out.println("url3:"+url3);
        //4、当前类的详细地址，包含路径包名
        String url4 = BasePath.class.getResource("").toURI().getPath();
        System.out.println("url4:"+url4);
        //5、当前类的根目录路径
        String url5 = BasePath.class.getResource("/").toURI().getPath();
        System.out.println("url5:"+url5);
        //6、用户的当前工作目录(user.dir)
        String url6 = System.getProperty("user.dir");
        System.out.println("url6:"+url6);

        //7、test.txt文件的路径为 项目名\src\test.txt;类TestPath所在包的第一级目录位于src目录下
        String url7 = BasePath.class.getClassLoader().getResource("test.xml").toURI().getPath();
        System.out.println("url7:"+url7);
    }
}

执行结果如下：

url:/Users/project/build/classes/
url2:/Users/project/build/classes/
url3:/Users/project/build/build/classes/
url4:/Users/project/build/build/classes/com/learn/webProjectPath/
url5:/Users/project/build/build/classes/
url6:/Users/project/build
url7:/Users/project/build/build/classes/test.xml

servlet中获取路径

在servlet中获取项目路径

		//1、根目录所对应的绝对路径：request.getServletPath()
		String path1 = req.getServletPath();
		System.out.println("path1:"+path1);
		
		//2、文件的绝对路径：request.getSession().getServletContext().getRealPath(request.getRequestURI())
		String path2 = req.getSession().getServletContext().getRealPath("/");
		System.out.println("path2:"+path2);
		
		//3、当前web应用的绝对路径：servletConfig.getServletContext().getRealPath("/")
		String path3 = this.getServletConfig().getServletContext().getRealPath("/");
		System.out.println("path3:"+path3);

执行结果如下:

path1:/path.action
path2:/Users/Documents/workspace/.metadata/.plugins/org.eclipse.wst.server.core/tmp0/wtpwebapps/project/
path3:/Users/Documents/workspace/.metadata/.plugins/org.eclipse.wst.server.core/tmp0/wtpwebapps/project/

jsp中获取路径

在jsp中获取项目路径

1、根目录所对应的绝对路径：request.getRequestURI()；<BR>
<%=request.getRequestURI() %><BR>

2、当前web应用的绝对路径：application.getRealPath("/")<BR>
<%=application.getRealPath("/") %><BR>

3、获取当前所有项目的路径：request.getContextPath()<BR>
<%=request.getContextPath() %>

执行结果如下：

1、根目录所对应的绝对路径：request.getRequestURI()；
/project/webProjectPath.jsp
2、当前web应用的绝对路径：application.getRealPath("/")
/Users/Documents/workspace/.metadata/.plugins/org.eclipse.wst.server.core/tmp0/wtpwebapps/project/
3、获取当前所有项目的路径：request.getContextPath()
/project