servlet之使用ServletContext获取资源路径

资源存放位置：

获取路径：

 

package cn.ServletContext.ml;

import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Set;

import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * 使用ServletContext对象获取资源路径
 * @author CDU_LM
 *
 */
@WebServlet("/DServlet")
public class DServlet extends HttpServlet {
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        // 获取ServletContext对象
        ServletContext app = this.getServletContext();
        // 获取路径（绝对路径）：有盘符的路径：D:/xxx/xx/xx.txt等
        String realPath = app.getRealPath("/index.jsp");
        System.out.println(realPath);
        // 将读取的资源转换为输入流对象
        InputStream input = app.getResourceAsStream("/index.jsp");
        
        // 获取当前路径下所有资源的路径
        Set<String> resourcePaths = app.getResourcePaths("/WEB-INF");
        System.out.println(resourcePaths);
    }
}

 请求结果：

 

D:\SoftWare\SoftWareFiles\EclipsProject\ServletDemo\.metadata\.plugins\org.eclipse.wst.server.core\tmp0\wtpwebapps\ServletContext\index.jsp
[/WEB-INF/lib/, /WEB-INF/classes/, /WEB-INF/web.xml]