一、向后台传值
1、项目结构
2、jar包
3、spring-config.xml
<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:oxm="http://www.springframework.org/schema/oxm" xmlns:context="http://www.springframework.org/schema/context" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:task="http://www.springframework.org/schema/task" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://www.springframework.org/schema/oxm http://www.springframework.org/schema/oxm/spring-oxm-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd http://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task-3.2.xsd"> <!-- 通知spring容器通过注解的方式装配bean --> <context:annotation-config /> <!-- 通知spring容器采用自动扫描机制查找注解的bean --> <context:component-scan base-package="com.*" /> <task:annotation-driven /> <!-- 定时器开关--> <bean id="agentExcelTask" class="com.timer.TimerController1"/> <task:scheduled-tasks> <task:scheduled ref="agentExcelTask" method="printstr" cron="* * 0/1000 * * ?"/> </task:scheduled-tasks> <!-- 配置返回页面过滤 --> <bean id="viewResolver" class="org.springframework.web.servlet.view.UrlBasedViewResolver"> <property name="viewClass" value="org.springframework.web.servlet.view.JstlView" /> <property name="prefix" value="/" /> <property name="suffix" value=".jsp" /> </bean> </beans>
4、LoginController.java，下面是spring向后台传值的三种方式。
package com.controller; import javax.servlet.http.HttpServletRequest; import org.springframework.stereotype.Controller; import org.springframework.ui.Model; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestParam; import com.demo.User; @Controller public class LoginController { /** * 使用HttpServletRequest获取 */ @RequestMapping("/login1") public String login1(HttpServletRequest request,Model model){ model.addAttribute("name", request.getParameter("name")); model.addAttribute("password", request.getParameter("password")); return "success"; } /** * spring自动将表单参数注入到方法参数,参数值和页面name属性一致时可以省去@RequestParam注解 */ @RequestMapping("/login2") public String login2(@RequestParam("name") String name, String password,Model model){ model.addAttribute("name", name); model.addAttribute("password", password); return "success"; } /** * 自动注入bean属性 */ @RequestMapping("/login3") public String login3(User user,Model model){ model.addAttribute("name", user.getName()); model.addAttribute("password", user.getPassword()); return "success"; } }
注：第三种方式自动注入bean属性需要定义实体类，本例中定义User.java
5、User.java
package com.demo; import javax.persistence.Entity; import javax.persistence.GeneratedValue; import javax.persistence.Id; @Entity public class User { @Id @GeneratedValue private long id; private String name; private String password; public long getId() { return id; } public void setId(long id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } public String getPassword() { return password; } public void setPassword(String password) { this.password = password; } }
6、index.jsp
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%> <%@ taglib prefix="spring" uri="http://www.springframework.org/tags" %> <% String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <base href="<%=basePath%>"> <title>index</title> </head> <body> <form action="login2" method="post"> 用户：<input type="text" name="name"><br><br> 密码：<input type="text" name="password"><br><br> <input type="submit" value="确定"> </form> <!-- 使用message 标签配置需要显示的国际化文本, code 对应国际化文件中对应的键的名称 --> <span style="color: #2D2D2D;"> <spring:message code="main.title"/> </span> <br> <input type="text" value="<spring:message code="main.target"/>"> </body> </html>
7、success.jsp
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%> <% String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <base href="<%=basePath%>"> <title>success</title> </head> <body> ${name},success. <br> 用户名：${name},密码：${password} </body> </html>
二、向前台传值的两种方式
package com.controller; import java.util.Map; import javax.servlet.http.HttpServletRequest; import org.springframework.stereotype.Controller; import org.springframework.ui.Model; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestParam; import com.demo.User; @Controller public class LoginController { @RequestMapping("/login2") public String login2(@RequestParam("name") String name, String password,Model model){ model.addAttribute("name", name); model.addAttribute("password", password); return "success"; } return "success"; } @RequestMapping("/login4") public String login4(User user, Map<String, Object> map){ map.put("name", user.getName()); map.put("password", user.getPassword()); return "success"; } }
三、springmvc重定向