Struts2--基于注解方式Action配置

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1、所需要的jar包：

具体示例

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>Struts2登录验证</title>
<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>
<h3>Struts2登录</h3><hr/>
<form action="${pageContext.request.contextPath}/user/login.qqi" method="post">
<table border="1" width="500px">
<tr>
<td>用户名</td>
<td><input type="text" name="loginname"/></td>
</tr>
<tr>
<td>密码</td>
<td><input type="password" name="pwd"/></td>
</tr>
<tr>
<td colspan="2"><input type="submit" value="登录"/></td>
</tr>
</table>
</form>
</body>
</html>

src/struts.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.1.7//EN"
"http://struts.apache.org/dtds/struts-2.1.7.dtd">
<struts>
<constant name="struts.i18n.encoding" value="UTF-8"/>
<constant name="struts.action.extension" value="action,do,go,qqi"/>
<constant name="struts.configuration.xml.reload" value="true"/>
<constant name="struts.devMode" value="false"/>
<constant name="struts.serve.static.browserCache" value="false" />
<!-- 指定由spring负责action对象的创建
<constant name="struts.objectFactory" value="spring" />
-->
<constant name="struts.enable.DynamicMethodInvocation" value="false"/>
</struts>

package com.action;

import org.apache.struts2.convention.annotation.Action;
import org.apache.struts2.convention.annotation.ExceptionMapping;
import org.apache.struts2.convention.annotation.ExceptionMappings;
import org.apache.struts2.convention.annotation.Namespace;
import org.apache.struts2.convention.annotation.ParentPackage;
import org.apache.struts2.convention.annotation.Result;
import org.apache.struts2.convention.annotation.Results;

import com.opensymphony.xwork2.ActionSupport;

@ParentPackage("struts-default")
//父包
@Namespace("/user")
@Results( { @Result(name = "success", location = "/msg.jsp"),
@Result(name = "error", location = "/error.jsp") })
@ExceptionMappings( { @ExceptionMapping(exception = "java.lange.RuntimeException", result = "error") })

public class LoginAction extends ActionSupport{

private static final long serialVersionUID = -2554018432709689579L;
private String loginname;
private String pwd;

@Action(value = "login")
public String login() throws Exception {

if ("qq".equals(loginname) && "123".equals(pwd)) {
return SUCCESS;
} else {
return ERROR;
}
}

public String getLoginname() {
return loginname;
}
public void setLoginname(String loginname) {
this.loginname = loginname;
}

public String getPwd() {
return pwd;
}
public void setPwd(String pwd) {
this.pwd = pwd;
}

}

注解配置的解释

1) @ParentPackage 指定父包

2) @Namespace 指定命名空间

3) @Results 一组结果的数组

4) @Result(name="success",location="/msg.jsp") 一个结果的映射

5) @Action(value="login") 指定某个请求处理方法的请求URL。注意，它不能添加在Action类上，要添加到方法上。

6) @ExceptionMappings 一级声明异常的数组

7) @ExceptionMapping 映射一个声明异常

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