【Java】【web】获取访问项目路径

作者: JerichoPH | 来源:发表于2017-04-09 18:06 被阅读146次

【Java】【web】获取访问项目路径
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获取访问根地址

String baseUrl = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort() + request.getContextPath() + "/";

String basePath = request.getServletContext().getRealPath("/");

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

String currentFilePath = request.getServletPath();
// 或使用
String currentFilePath = request.getRequestURI();

获取当前访问全地址

String currentRequestUrl = request.getRequestURL();

base标签
在base标签中的url属性值会当前页面中所有的url前面插入

index.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%String baseUrl = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort() + request.getContextPath() + "/";%>
<html>
<head>
    <base href="<%=baseUrl%>">
    <title>JDemo</title>
    <script src="/resource/ui/js/jquery-1.11.0.min.js"></script>
</head>
<body>
<h1>JDemo</h1>
<a href="javascript:">ajax测试</a>
</body>
<script>
    $.ajax({
        url: "index",
        type: "post",
        data: {name: "张三", age: "23", url: "<%=baseUrl%>index"},
        success: function (Res) {
            console.log(Res);
        }
    });
</script>
</html>

IndexServlet.java

package com.demo;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Map;

@WebServlet(name = "IndexServlet")
public class IndexServlet extends HttpServlet {
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    request.setCharacterEncoding("utf-8");
    response.setContentType("text/html; charset=utf-8");
    PrintWriter out = response.getWriter();

    Map<String, String[]> parameterMap = request.getParameterMap();
    for (Map.Entry<String, String[]> m :
            parameterMap.entrySet()) {
        String name = m.getKey();
        String[] values = m.getValue();
        for (String value :
                values) {
            System.out.print(name + ":" + value);
        }
        System.out.println();
    }
    out.print("ok");
}

protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    request.setCharacterEncoding("utf-8");
    response.setContentType("text/html; charset=utf-8");
    PrintWriter out = response.getWriter();

    request.getRequestDispatcher("/index.jsp").forward(request, response);
}
}