一、SpringMVC向页面传递参数的4种方式
1、使用HttpServletRequest和 Session 然后setAttribute(),就和Servlet中一样
request.setAttribute(“user”,user_data);
2、使用ModelAndView对象
@RequestMapping("/login.do")
public ModelAndView login(String name,String pass) {
User user = userService.login(name,pwd);
Map<String,Object> data = new HashMap<String,Object>();
data.put("user",user);
return new ModelAndView("success",data);
}
3、使用ModelMap对象
ModelMap数据会利用HttpServletRequest的Attribute传值到success.jsp中
@RequestMapping("/login.do")
public String login(String name,String pass ,ModelMap modelMap) {
User user =userService.login(name,pwd);
modelMap.addAttribute("user",user);
modelMap.put("name",name);
return "success";
}
Session存储,可以利用HttpServletReequest的getSession()方法 @RequestMapping("/login.do")
Public String login (String name,Stringpwd,ModelMap model,HttpServletRequest request) {
User user = serService.login(name,pwd);
HttpSession session = request.getSession();
session.setAttribute("user",user);
model.addAttribute("user",user);
return "success";
}
4、使用@ModelAttribute注解
@ModelAttribute数据会利用HttpServletRequest的Attribute传值到success.jsp中
@RequestMapping("/login.do")
public String login(@ModelAttribute("user") User user) {
return "success";
}
@ModelAttribute("name")
public String getName() {
return name;
}
Spring MVC 默认采用的是转发来定位视图,如果要使用重定向,可以如下操作
1,使用RedirectView
2,使用redirect:前缀
- public ModelAndView login(){
- RedirectView view = new RedirectView("regirst.do");
- return new ModelAndView(view);
- }
或者用如下方法,工作中常用的方法:
- public String login(){
-
- return "redirect:regirst.do";
- }
二、获取前台jsp页面数据
一个普通的表单。
表单的代码如下:
- <%@ page language="java" contentType="text/html; charset=UTF-8"
- pageEncoding="UTF-8"%>
- <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
- <html>
- <head>
- <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
- <title>Add User</title>
-
-
- <script type="text/javascript">
-
- function addUser() {
- var form = document.forms[0];
- form.action = "${pageContext.request.contextPath}/user/addUser1";
-
-
- form.method = "post";
- form.submit();
- }
- </script>
-
- </head>
- <body>
- <form>
- <table>
- <tr>
- <td>账号</td>
- <td>
- <input type="text" name="userName">
- </td>
- </tr>
- <tr>
- <td>密码</td>
- <td>
- <input type="password" name="password">
- </td>
- </tr>
- <tr>
- <td> </td>
- <td>
- <input type="button" value="提交" onclick="addUser()">
- </td>
- </tr>
- </table>
- </form>
- </body>
- </html>
1、直接把表单的参数写在Controller相应的方法的形参中
- @RequestMapping("/addUser1")
- public String addUser1(String userName,String password) {
- System.out.println("userName is:"+userName);
- System.out.println("password is:"+password);
- return "/user/success";
- }
2、通过HttpServletRequest接收
- @RequestMapping("/addUser2")
- public String addUser2(HttpServletRequest request) {
- String userName = request.getParameter("userName");
- String password = request.getParameter("password");
- System.out.println("userName is:"+userName);
- System.out.println("password is:"+password);
- return "/user/success";
- }
3、通过一个bean来接收
1)建立一个和表单中参数对应的bean
- public class User {
-
- private String userName;
- private String password;
-
- public String getUserName() {
- return userName;
- }
-
- public void setUserName(String userName) {
- this.userName = userName;
- }
-
- public String getPassword() {
- return password;
- }
-
- public void setPassword(String password) {
- this.password = password;
- }
- }
2)用这个bean来封装接收的参数
- @RequestMapping("/addUser3")
- public String addUser3(User user) {
- System.out.println("userName is:"+user.getUserName());
- System.out.println("password is:"+user.getPassword());
- return "/user/success";
- }
4、通过json数据接收
- <%@ page language="java" contentType="text/html; charset=UTF-8"
- pageEncoding="UTF-8"%>
- <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
- <html>
- <head>
- <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
- <title>Add User</title>
-
- <script type="text/javascript" src="${pageContext.request.contextPath}/resource/script/jquery-1.9.1.min.js"></script>
- <script type="text/javascript">
- $(document).ready(function(){
- $("#button_submit").click(function(){
- var name = $("#userName").val();
- var pass = $("#password").val();
-
-
- var user = {userName:name,password:pass};
-
- $.ajax({
- type:"POST",
- url:"${pageContext.request.contextPath}/user/addUser4",
- data:user,
- success:function(data){
- alert("成功");
- },
- error:function(e) {
- alert("出错:"+e);
- }
- });
- });
- });
- </script>
-
- </head>
- <body>
- <form>
- <table>
- <tr>
- <td>账号</td>
- <td>
- <input type="text" id="userName" name="userName">
- </td>
- </tr>
- <tr>
- <td>密码</td>
- <td>
- <input type="password" id="password" name="password">
- </td>
- </tr>
- <tr>
- <td> </td>
- <td>
- <input type="button" id="button_submit" value="提交">
- </td>
- </tr>
- </table>
- </form>
- </body>
- </html>
依然可以使用bean来接收json数据
- @RequestMapping("/addUser4")
- public String addUser4(User user) {
- System.out.println("userName is:"+user.getUserName());
- System.out.println("password is:"+user.getPassword());
- return "/user/success";
- }
5、使用jQuery的serializeArray() 方法序列化表单元素
如果表单元素很多,手工拼装成json数据非常麻烦,可以使用jQuery提供的serializeArray()方法序列化表单元素,返回json数据结构数据。
- <%@ page language="java" contentType="text/html; charset=UTF-8"
- pageEncoding="UTF-8"%>
- <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
- <html>
- <head>
- <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
- <title>Add User</title>
-
- <script type="text/javascript" src="${pageContext.request.contextPath}/resource/script/jquery-1.9.1.min.js"></script>
- <script type="text/javascript">
- $(document).ready(function(){
- $("#button_submit").click(function(){
-
-
- var params = $("#userForm").serializeArray();
-
-
-
-
- $.ajax({
- type:"POST",
- url:"${pageContext.request.contextPath}/user/addUser5",
- data:params,
- success:function(data){
- alert("成功");
- },
- error:function(e) {
- alert("出错:"+e);
- }
- });
- });
- });
- </script>
-
- </head>
- <body>
- <form id="userForm">
- <table>
- <tr>
- <td>账号</td>
- <td>
- <input type="text" id="userName" name="userName">
- </td>
- </tr>
- <tr>
- <td>密码</td>
- <td>
- <input type="password" id="password" name="password">
- </td>
- </tr>
- <tr>
- <td> </td>
- <td>
- <input type="button" id="button_submit" value="提交">
- </td>
- </tr>
- </table>
- </form>
- </body>
- </html>
依然可以使用bean来接收json数据:
- @RequestMapping("/addUser5")
- public String addUser5(User user) {
- System.out.println("userName is:"+user.getUserName());
- System.out.println("password is:"+user.getPassword());
- return "/user/success";
- }
文章参考:
转:http://www.cnblogs.com/luxh/archive/2013/03/14/2960152.html
http://wenku.baidu.com/link?url=g1L8kQWKXi7z_I1uVc3ovTMa3K9wU9jZGTqEHOgZ6I7387Hbr5TpPXxQYQHvfNSmnc9woZqefYNfRzPZ-gqrJDGSO7FujqeX1NOixMSCCtO