Spring2.5 MVC annoation使用
Spring2.5比Spring2.0改善最大的亮点就在于annoation应用于MVC部分，大大减少了配置文件，刚刚完成一个小例子，用起来蛮舒服的。
运行环境 :JDK1.5 TOMCAT5.5
先来看看配置文件
1.applicationContext.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"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-2.5.xsd">
<annotation-config /><!--annoation的配置,不写包名默认搜索全部-->
</beans>
2.web.xml ,这个文件看起来似乎没有多大的变化，不过要注意模板～～
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
<display-name>springapp</display-name>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext*.xml</param-value>
</context-param>
<!-- Character Encoding filter -->
<filter>
<filter-name>encodingFilter</filter-name>
<filter-class>org.springframework.web.filter.CharacterEnco dingFilter</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>
<!--Spring ApplicationContext 载入 -->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<servlet>
<servlet-name>simple</servlet-name>
<servlet-class>
org.springframework.web.servlet.DispatcherServlet
</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>simple</servlet-name>
<url-pattern>*.do</url-pattern>
</servlet-mapping>
</web-app>
3.springapp-servlet.xml ,这个配置文件是不是看起来清爽了很多，不像2.0那么复杂了。
<?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:p="http://www.springframework.org/schema/p" xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-2.5.xsd">
<!--
- The controllers are autodetected POJOs labeled with the @Controller annotation.
-->
<component-scan base-package="test"/> <!--指定解析该包名下的controller-->
<bean
class="org.springframework.web.servlet.view.InternalResourceViewResolver"
p:prefix="/WEB-INF/jsp/" p:suffix=".jsp" />
</beans>
4.下边看看使用annoation风格的Controller: 这个相当于原来的simpleFormController
package test;
import javax.servlet.http.HttpServletRequest;
import org.springframework.stereotype.Controller;
import org.springframework.ui.ModelMap;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.support.SessionStatus;
@Controller
@RequestMapping("/person.do")
public class PersonForm {
private static Person person = new Person();
@RequestMapping(method = RequestMethod.GET)
public String setupForm(@RequestParam("id") long id, ModelMap model,
HttpServletRequest request) {
String s = request.getParameter("id");
System.out.println("getIdddddd " + s);
model.addAttribute("person", getPerson(id));
return "personForm";
}
@RequestMapping(method = RequestMethod.POST)
public String processSubmit(@ModelAttribute("person") Person person,
BindingResult result, SessionStatus status) {
if (result.hasErrors()) {
return "personForm";
} else {
PersonForm.person = person;
System.out.println("person name set to:" + person.getName());
status.setComplete();
return "redirect:person.do?id=" + person.getId();
}
}
private Person getPerson(long id) {
return person;
}
}
5.在来看个muliController的例子
package test;
import javax.servlet.http.HttpServletRequest;
import org.springframework.stereotype.Controller;
import org.springframework.ui.ModelMap;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.support.SessionStatus;
@Controller
@RequestMapping("/person.do")
public class PersonForm {
private static Person person = new Person();
@RequestMapping(method = RequestMethod.GET)
public String setupForm(@RequestParam("id") long id, ModelMap model,
HttpServletRequest request) {
String s = request.getParameter("id");
System.out.println("getId " + s);
model.addAttribute("person", getPerson(id));
return "personForm";//直接返回view层名称 -->personForm.jsp
}
@RequestMapping(method = RequestMethod.POST)
public String processSubmit(@ModelAttribute("person") Person person,
BindingResult result, SessionStatus status) {
if (result.hasErrors()) {
return "personForm";
} else {
PersonForm.person = person;
System.out.println("person name set to:" + person.getName());
status.setComplete();
return "redirect:person.do?id=" + person.getId();
}
}
private Person getPerson(long id) {
return person;
}
}
6.在看看view层:
personForm.jsp
test.jsp
7.所需要加载的jar包
spring.jar spring-agent.jar spring-aop.jar spring-aspects.jar spring-beans.jar spring-context.jar
spring-context-support.jar spring-core.jar spring-web.jar spring-webmvc.jar
8.如果页面使用了jstl，还需要使用两个额外的jar
jstl.jar standard.jar