Spring3 MVC annotation 案例
项目需要用到Spring3.0的MVC和annotation，以前也接触过Spring，不过仅限于自己学习Spring的AOP和IoC，第一次听到Spring的MVC确实有点手足无措。网上参考了几个小案例，整了一下午，终于明白了点。分享一下。
这个Demo中，index.jsp里面有4个链接，分别对应Controller类中的四个方法。第一个与第二个方法同样Mapping的是一个简单的路径，分别return一个ModelAndView和String。第三个方法Mapping一个带参数的链接，第四个方法Mapping一个带路径变量和参数的链接。在方法中做处理后返回要展示的页面和数据。
1）新建一个Dynamic Web Project——SpringMVCDemo
2）引入jar包。包括spring中dist目录下的所有jar包，以及jstl.jar，standard.jar包（JSP页面中的for each标签要用到）和commons-logging-1.1.1.jar包。
3）配置web.xml文件，内容如下：
<?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" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" 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"> <servlet> <servlet-name>springMVCDemo</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> </servlet> <servlet-mapping> <servlet-name>springMVCDemo</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping> <welcome-file-list> <welcome-file>index.html</welcome-file> <welcome-file>index.htm</welcome-file> <welcome-file>index.jsp</welcome-file> <welcome-file>default.html</welcome-file> <welcome-file>default.htm</welcome-file> <welcome-file>default.jsp</welcome-file> </welcome-file-list> </web-app>
4）在web.xml所在路径下新建springMVCDemo-servlet.xml，名字中的springMVCDemo是web.xml中配置的servlet-name，所以这个xml文件的名字是固定的。内容如下：
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd">
<mvc:annotation-driven />
<!-- 注释资源扫描包路径 -->
<context:component-scan base-package="org.spring.wayne.controller" />
<bean
class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping" />
<bean
class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter" />
<!-- 对模型视图名称的解析，即在模型视图名称添加前后缀,在requestmapping输入的地址后自动调用该类进行视图解析 -->
<bean id="viewResolver"
class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="viewClass"
value="org.springframework.web.servlet.view.JstlView" />
<property name="prefix" value="/WEB-INF/jsp/" /><!-- 跳转页面的前缀路径
如 /web-inf/jsp/ -->
<property name="suffix" value=".jsp"></property><!-- 跳转页面后缀 如 helloWorld.jsp -->
</bean>
</beans>
5）新建一个POJO类User.java，内容如下：
package org.spring.wayne.model;
public class User {
private String name;
private int age;
public User() {
}
public User(String name, int age) {
this.age = age;
this.name = name;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
}
6）编写Controller类DemoController.java，内容如下：
package org.spring.wayne.controller;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.spring.wayne.model.User;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.servlet.ModelAndView;
@Controller
public class DemoController {
@RequestMapping("/getmav")
public ModelAndView getInfo() {
ModelAndView mav = new ModelAndView();
// 传String
mav.addObject("title", "Return ModelAndView");
// 传Object
User user = new User("wayne", 24);
mav.addObject("user", user);
// 传List
List<User> list = new ArrayList<User>();
list.add(new User("wayne1", 12));
list.add(new User("wayne2", 24));
list.add(new User("wayne3", 34));
list.add(new User("wayne4", 45));
mav.addObject("list", list);
// 传Map
Map<String, String> map = new HashMap<String, String>();
map.put("name", "wayne");
map.put("age", "24");
mav.addObject("map", map);
mav.setViewName("result");
return mav;
}
@RequestMapping("/string")
public String getInfo(Model model) {
// 传String
model.addAttribute("title", "Return String");
// 传Object
User user = new User("wayne", 24);
model.addAttribute("user", user);
// 传List
List<User> list = new ArrayList<User>();
list.add(new User("wayne1", 12));
list.add(new User("wayne2", 24));
list.add(new User("wayne3", 34));
list.add(new User("wayne4", 45));
model.addAttribute("list", list);
// 传Map
Map<String, String> map = new HashMap<String, String>();
map.put("name", "wayne");
map.put("age", "24");
model.addAttribute("map", map);
return "result";
}
@RequestMapping("/strparam")
public String getInfo(@RequestParam("name") String name,
@RequestParam("age") String age, Model model) {
// 传String
model.addAttribute("title", "Return String @RequestParam");
// 传Object
User user = new User(name, Integer.valueOf(age));
model.addAttribute("user", user);
// 传List
List<User> list = new ArrayList<User>();
list.add(new User(name, Integer.valueOf(age)));
list.add(new User(name, Integer.valueOf(age)));
list.add(new User(name, Integer.valueOf(age)));
list.add(new User(name, Integer.valueOf(age)));
model.addAttribute("list", list);
// 传Map
Map<String, String> map = new HashMap<String, String>();
map.put("name", "wayne");
map.put("age", "24");
model.addAttribute("map", map);
return "result";
}
@RequestMapping("/strparam/{name}")
public String getInfor(@PathVariable("name") String name,
@RequestParam("age") String age, Model model) {
// 传String
model.addAttribute("title", "Return String @PathVariable");
// 传Object
User user = new User(name, Integer.valueOf(age));
model.addAttribute("user", user);
// 传List
List<User> list = new ArrayList<User>();
list.add(new User(name, Integer.valueOf(age)));
list.add(new User(name, Integer.valueOf(age)));
list.add(new User(name, Integer.valueOf(age)));
list.add(new User(name, Integer.valueOf(age)));
model.addAttribute("list", list);
// 传Map
Map<String, String> map = new HashMap<String, String>();
map.put("name", name);
map.put("age", age);
model.addAttribute("map", map);
return "result";
}
}
7）编写JSP页面，WebContent目录下的index.jsp内容如下：
<%@ 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>Insert title here</title> </head> <body> <a href="http://localhost:9090/SpringMVCDemo/getmav">http://localhost:9090/SpringMVCDemo/getmav</a> <br /> <a href="http://localhost:9090/SpringMVCDemo/string">http://localhost:9090/SpringMVCDemo/string</a> <br /> <a href="http://localhost:9090/SpringMVCDemo/strparam?name=wayne&age=24">http://localhost:9090/SpringMVCDemo/strparam?name=wayne&age=24</a> <br /> <a href="http://localhost:9090/SpringMVCDemo/strparam/name=wayne?age=24">http://localhost:9090/SpringMVCDemo/strparam/name=wayne?age=24</a> </body> </html>
WebContent/WEB-INF/jsp路径（该路径为springMVCDemo-servlet.xml文件中id为viewResolver的prefix属性所配置）下的result.jsp的内容如下：
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<!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>
This is the result page .
<br /> Title: ${title}
<br /> Object:
<br /> Name: ${user.name} Age: ${user.age}
<br /> List:
<br />
<c:forEach var="u" items="${list }">
Name: ${u.name }
Age: ${u.age }<br />
</c:forEach>
Map:
<br /> Name: ${map.name } Age: ${map.age}
<br />
</body>
</html>
Demo已经完成，运行如下图所示：
打开tomcat，在浏览器中输入http://localhost:9090/SpringMVCDemo/index.jsp后如图所示：
依次打开浏览器中的链接，运行结果如下图所示：
这就是一个完整的简单的Spring MVC Demo ,参考来自网络……#