struts2学习笔记之十四:使用注解配置Action(不是和spring集成使用)

Struts2支持使用注解配置Action,减少配置文件的配置

Struts2如果要支持注解配置Action,需要插件的支持,导入插件struts2-convention-plugin-2.1.8.1.jar

项目目录树:

1.导入struts2需要的基本包

2.修改web.xml,让struts2拦截Action

<?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_2_5.xsd" id="WebApp_ID" version="2.5">
  <display-name>s2_1</display-name>
  <welcome-file-list>
      <welcome-file>login.jsp</welcome-file>
  </welcome-file-list>
  <filter>
          <filter-name>struts2</filter-name>
          <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
  </filter>
  <filter-mapping>
          <filter-name>struts2</filter-name>
          <url-pattern>/*</url-pattern>
  </filter-mapping>
</web-app>

3.提供实体类User.java

package com.orange.domain;

public class User {

    private String userName;
    
    private String password;

    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;
    }
    
    
}

4.提供Action类LoginAction.java

package com.orange.action;



import org.apache.struts2.convention.annotation.Action;
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;
import com.orange.domain.User;

//默认可以不写
@ParentPackage("struts-default")
//根命名空间,可以不写
@Namespace("/")
//全局配置,如果方法上不指定result,则使用该Result
//@Results({@Result(name="success",location="/success.jsp"),
//    @Result(name="error",location="/error.jsp")})
public class LoginAction  extends ActionSupport{

    private static final long serialVersionUID = 1L;
    private User user;

    public User getUser() {
        return user;
    }

    public void setUser(User user) {
        this.user = user;
    }
    
    //@Action(value="login2")
    @Action(value="login2" ,results={@Result(name="success",location="/success.jsp"),
                                     @Result(name="error",location="/error.jsp")})
    public String login() throws Exception{
        if("admin".equals(this.user.getUserName()) && "admin".equals(this.user.getPassword())){
            return SUCCESS;
        }
        
        return ERROR;
    }
}

5.配置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="GBK"/> 
     <constant name="struts.devMode" value="true" />
      <constant name="struts.configuration.xml.reload" value="true" />
     
</struts>

6.提供相关的jsp

<%@ page language="java" contentType="text/html; charset=GBK"
    pageEncoding="GBK"%>
<!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=GBK">
<title>Insert title here</title>
</head>
<body>

<form action="login2" method="post">
    User:<input type="text" name="user.userName"><br>
    Password:<input type="text" name="user.password"><br>
    <input type="submit" value="submit">
</form>
</body>
</html>

success.jsp

<%@ page language="java" contentType="text/html; charset=GBK"
    pageEncoding="GBK"%>
<!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=GBK">
<title>Insert title here</title>
</head>
<body>
    Success!
</body>
</html>

error.jsp

<%@ page language="java" contentType="text/html; charset=GBK"
    pageEncoding="GBK"%>
<!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=GBK">
<title>Insert title here</title>
</head>
<body>
    Error!
</body>
</html>

7.开始测试

输入admin/admin

配置成功!!!