控制层重定向到控制层-无参数传递

最新推荐文章于 2021-07-02 17:34:57 发布

养码哥

最新推荐文章于 2021-07-02 17:34:57 发布

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本文链接：https://blog.youkuaiyun.com/IThelei/article/details/88401965

控制层重定向到控制层典型的情况就是登陆成功后重定向list显示数据

核心代码：

`
package controller;
import java.util.ArrayList;
import java.util.List;

import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;

@Controller
public class UserinfoController {
@RequestMapping(value = "login")
public String loginMethod(String username) {
    System.out.println("loginMethod username=" + username);
    return "redirect:/listString.spring";
}

@RequestMapping(value = "listString")
public String listStringMethod(Model model) {
    System.out.println("listStringMethod");
    List list = new ArrayList();
    list.add("1");
    list.add("2");
    list.add("3");
    list.add("4");

    model.addAttribute("list", list);

    return "listString.jsp";
}
}
 `

index.jsp

`

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
</head>
<body>
    post:
<br />
<form action="login.spring" method="post">
    username:<input type="text" name="username"><br /> password:<input
        type="text" name="password"><br /> <input type="submit"
        value="submit"><br />
</form>
<br /> get:
<br />
<form action="login.spring" method="get">
    username:<input type="text" name="username"><br /> password:<input
        type="text" name="password"><br /> <input type="submit"
        value="submit"><br />
</form>
</body>
</html>`

listString.jsp

 `

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
</head>
<body>
    <c:forEach var="eachString" items="${list}">
${eachString}<br />
    </c:forEach>
</body>
</html>
 `

SpringMVC4中重定向的关键代码就是返回字符串中要加入“redirect:/”前缀，代表这个操作是重定向