struts2小结

 

    今天无聊，想自己学习一下struts2.自己做了一个简单的例子。

 

   struts2必要的jar包

• commons-logging-1.0.4.jar
• commons-fileupload-1.2.1.jar
• freemarker-2.3.16.jar
• ognl-3.0.jar
• struts2-core-2.2.1.jar
• xwork-core-2.2.1.jar

注意的是struts.xml，必须在class目录。也就是在编译环境下src目录下。

 

 

下面把例子奉上。

struts.xml

 

xml version="1.0" encoding="UTF-8"?>

    "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
    "http://struts.apache.org/dtds/struts-2.0.dtd">
<struts>


    <package name="default" namespace="/user" extends="struts-default">


        <action name="user" method="login" class="com.user.atction.UserAction">
            <result name="success">success.jspresult>
            <result name="error">error.jspresult>
        action>
    package>
struts>

 

 

struts.properties

 

struts.i18n.encoding=gb2312

 

action

 

package com.user.atction;

import javax.persistence.EntityManagerFactory;
import javax.persistence.Persistence;

import com.daoimp.Userimp;
import com.entity.User;
import com.opensymphony.xwork2.ActionSupport;

public class UserAction extends ActionSupport {

    private static final long serialVersionUID = 1L;

    private String username;

    private String password;

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public String login() {
        //持久层的JPA代码
        EntityManagerFactory factory = Persistence
                .createEntityManagerFactory("JpaTest");
        Userimp userDao = new Userimp();
        userDao.setManager(factory.createEntityManager());

        User user = new User();
        user.setUserName(this.getUsername());
        user.setPassWord(this.getPassword());
        String url = "error";
        if (userDao.findUser(user) != null) {
            url = "success";
        }
        return url;

    }
}

在struts2中，不需要request.getParameter(xxx)获取JSP页面中form表单中的值,struts已经为我们封装好了。

只要在action中，声明一个属性，有get()和set(),在action获取值。

 

<s:form action="user/user" method="post" >

    user:<input type="text" name="username"/>


    pass:<input type="password" name="password"/>
    <s:submit/>
 s:form>