spring mvc学习（30）:sessionatrribute存储session数据

创建maven项目就不说了，需要的找我前面的博客

pom.xml文件

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"><modelVersion>4.0.0</modelVersion><groupId>com.geyao</groupId><artifactId>springmaven</artifactId><version>0.0.1-SNAPSHOT</version><dependencies><dependency><groupId>org.springframework</groupId><artifactId>spring-webmvc</artifactId><version>4.2.8.RELEASE</version>
</dependency>
<dependency><groupId>org.springframework</groupId><artifactId>spring-context</artifactId><version>4.2.8.RELEASE</version>
</dependency>
<dependency>  <groupId>javax.servlet</groupId>  <artifactId>servlet-api</artifactId>  <version>2.5</version>  </dependency>
<dependency><groupId>org.springframework</groupId><artifactId>spring-core</artifactId><version>4.2.8.RELEASE</version>
</dependency>
<dependency><groupId>org.springframework</groupId><artifactId>spring-beans</artifactId><version>4.2.8.RELEASE</version>
</dependency>
<dependency><groupId>org.springframework</groupId><artifactId>spring-web</artifactId><version>4.2.8.RELEASE</version>
</dependency>
<dependency><groupId>org.springframework</groupId><artifactId>spring-aop</artifactId><version>4.2.8.RELEASE</version>
</dependency>
<dependency><groupId>org.springframework</groupId><artifactId>spring-expression</artifactId><version>4.2.8.RELEASE</version>
</dependency></dependencies>
</project>

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0"><display-name>Springmaven01</display-name><welcome-file-list><welcome-file>/WEB-INF/jsp/home.jsp</welcome-file></welcome-file-list><!-- 处理中文乱码 --><filter><filter-name>encodingFilter</filter-name><filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class><init-param><param-name>encoding</param-name><param-value>UTF-8</param-value></init-param></filter><filter-mapping><filter-name>encodingFilter</filter-name><url-pattern>/*</url-pattern></filter-mapping><!-- SpringMVC控制器 --><servlet><servlet-name>dispatcherServlet</servlet-name><!-- 主要就是DispatcherServlet这个servlet起到分发的作用，对请求进行控制分发 --><servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class><init-param><!-- 每个springmvc项目都要一个springmvc项目配置位置，下面配置springmvc配置文件的路径 --><param-name>contextConfigLocation</param-name><param-value>classpath*:springMVC-servlet.xml</param-value></init-param><!-- 当容器启动时立即启动 --><load-on-startup>1</load-on-startup></servlet><servlet-mapping><servlet-name>dispatcherServlet</servlet-name><!-- 下面配置springmvc的过滤分发请求类型，可以是/ 或者*.action等 --><url-pattern>/</url-pattern></servlet-mapping></web-app>

springMVC-servlet.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:context="http://www.springframework.org/schema/context"xmlns:mvc="http://www.springframework.org/schema/mvc"xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsdhttp://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.1.xsdhttp://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.1.xsd"><!-- 定义要扫描 controller的包--><context:component-scan base-package="wormday.springmvc.helloworld" /><!-- 配置视图解析器 如何把handler 方法返回值解析为实际的物理视图 --><!--指定视图解析器--><bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"><!-- 视图的路径 --><property name="prefix" value="/WEB-INF/jsp/"/><!-- 视图名称后缀  --><property name="suffix" value=".jsp"/></bean></beans>

indexcontoller类

package wormday.springmvc.helloworld;import javax.servlet.http.HttpSession;import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.RequestMapping;@Controller
@RequestMapping("/test")
public class IndexController {@RequestMapping("/index")  public String say() { System.out.print();return "home";}
}

UserController类

package wormday.springmvc.helloworld;import java.util.Map;import javax.servlet.http.HttpSession;import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.SessionAttributes;
import org.springframework.web.servlet.ModelAndView;import wormday.springmvc.pojo.Address;
import wormday.springmvc.pojo.User;
@Controller
@RequestMapping("/user")
@SessionAttributes(value= {"user"},types= {String.class})
public class UserController {@RequestMapping("/form")public String form() {return "form";}@RequestMapping("/save")public String save(User user) {System.out.print(user);return "success";}@RequestMapping("/edit")public ModelAndView edit(HttpSession session) {User user = new User();user.setUsername("helen");user.setPassword("123");user.setAge(12);user.setEmail("11@qq.com");Address address = new Address();address.setProvince("anhui");address.setCity("haha");user.setAddress(address);ModelAndView mv = new ModelAndView();mv.setViewName("form");mv.addObject("user", user);return mv;}@RequestMapping("/edit1")public String edit1(Map<String,Object> map) {User user = new User();user.setUsername("helen111");user.setPassword("123");user.setAge(12);user.setEmail("11@qq.com");Address address = new Address();address.setProvince("jiangsu");address.setCity("hah");user.setAddress(address);map.put("user",user);return "form";}@RequestMapping("/edit2")public String edit2(Model model) {User user = new User();user.setUsername("helen111");user.setPassword("123");user.setAge(12);user.setEmail("11@qq.com");Address address = new Address();address.setProvince("jiangsu");address.setCity("hah");user.setAddress(address);model.addAttribute("user",user);model.addAttribute("strvalue","gp1701");model.addAttribute("intvalue",1701);return "form";}
}

Address类

package wormday.springmvc.pojo;public class Address {private String province;public String getProvince() {return province;}public void setProvince(String province) {this.province = province;}public String getCity() {return city;}public void setCity(String city) {this.city = city;}private String city;public Address() {super();}@Overridepublic String toString() {return "Address [province=" + province + ", city=" + city + "]";}}

user类

package wormday.springmvc.pojo;public class User {public User() {super();// TODO Auto-generated constructor stub}private String username;private String password;private String email;private Integer age;private Address address;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;}public String getEmail() {return email;}public void setEmail(String email) {this.email = email;}public Integer getAge() {return age;}public void setAge(Integer age) {this.age = age;}public Address getAddress() {return address;}public void setAddress(Address address) {this.address = address;}@Overridepublic String toString() {return "User [username=" + username + ", password=" + password + ", email=" + email + ", age=" + age+ ", address=" + address + "]";}}

form.jsp

<%@ 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>Insert title here</title>
</head>
<body>
${sessionScope.strvalue}
${sessionScope.intvalue}
<form action="save" method="post">
<label for="">用户名:<input type="text" name="username" value="${RequestScope.user.username}"/></label>
<label for="">密码:<input type="text" name="password" value="${user.password}"/></label>
<label for="">年龄:<input type="text" name="age" value="${sessionScope.user.age}"/></label>
<label for="">邮箱:<input type="text" name="email" value="${user.email}"/></label>
<label for="">省份:<input type="text" name="address.province" value="${user.address.province}"/></label>
<label for="">城市:<input type="text" name="address.city" value="${user.address.city}"/></label>
<button>登录</button>
</form>
</body>
</html>

运行结果

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