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springMVC之Annotation启用

在spring2.5之后推出了一个很好用的东西就是annotation。annotation减少我们不断的配置配置文件。

下面说说annotation的启动。

annotation的启动主要分为两个步骤:

第一,设置annotation的扫描包,即annotation在那个包中出现:

<context:component-scan base-package="com.yx.controller.annotation"></context:component-scan>

第二,开启映射方法

<!-- 方法映射 -->
<bean></bean>
<!-- 找类 -->
<bean></bean>

主要是上面三段代码即可开启spring的注解。

在controller中:

package com.yx.controller.annotation;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.servlet.ModelAndView;

@Controller//annotation中表示一个controller类
public class HelloAnnotationController {

@RequestMapping(value="/user/adduser",method=RequestMethod.GET)//表示方法value为工作空间,method为请求方法,可以不写,不写代表任意的请求方法都可以
public ModelAndView addUser(){

return new ModelAndView("/annotationTest","result","add user");

}
@RequestMapping(value="/user/deluser")
public ModelAndView delUser(){

return new ModelAndView("/annotationTest","result","delete user");

}

}

jsp页面

 

annotationTest.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>My JSP 'annotationTest.jsp' starting page</title>

<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->

</head>

<body>
This is my JSP page. <br>
${result }
<form action="deluser" method="post">
<input type="submit" value="提交" >

</form>
</body>
</html>

 

annotationTest.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>My JSP 'annotationTest.jsp' starting page</title>

<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->

</head>

<body>
This is my JSP page. <br>
${result }
<form action="deluser" method="post">
<input type="submit" value="提交" >

</form>
</body>
</html>
如果请求的是deluser无论是post还是get都可以,但是请求adduser时只能是get请求。

这里有下载的小例子。

http://download.csdn.net/detail/yuexin2/5673391


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