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

时间：2022-05-12 08:11:56

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:

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

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

login.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

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

输入admin/admin

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

配置成功!!!

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