一个struts2程序

package action;



import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.util.Map;
import java.io.PrintStream;

import com.opensymphony.xwork2.Action;
import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;

//Action本质上是一个POJO:Plain Old Java Object(JavaBean)
public class Loginaction extends ActionSupport {
    private String user, pass; //private
    private String mail_address,telephone,birth_date;
    
    public String execute(){
        
        System.out.println("User:" + user + ",Pass:" + pass);
        if(user == null || user.length() == 0)
            return "fair";
        ActionContext context = ActionContext.getContext();//action 的上下文对象
        //Map session = context.getSession();//actiontext本身就是一个session
        Map<String,Object> session =context.getSession();
        session.put("user", user);
        session.put("pass", pass);
        session.put("mail_address", mail_address);
        session.put("telephone", telephone);
        //FileOutputStream out =null;
        
      try {
            File file = new File("D://file.txt");
                //FileOutputStream fs = new FileOutputStream(file);

                PrintStream ps =null;
                ps =new PrintStream(file);
           
                
                 ps.println(user);// 往文件里写入字符串
                 ps.append(pass);// 在已有的基础上添加字符串
            
           
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        }

        return SUCCESS;
    }

    public String getMail_address() {
        return mail_address;
    }

    public void setMail_address(String mail_address) {
        this.mail_address = mail_address;
    }

    public String getTelephone() {
        return telephone;
    }

    public void setTelephone(String telephone) {
        this.telephone = telephone;
    }


    public String getUser() {
        return user;
    }

    public void setUser(String user) {
        this.user = user;
    }

    public String getPass() {
        return pass;
    }

    public void setPass(String pass) {
        this.pass = pass;
    }
}

<?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>teststruts2</display-name>
  <welcome-file-list>
    <welcome-file>index.html</welcome-file>
    <welcome-file>index.htm</welcome-file>
    <welcome-file>index.jsp</welcome-file>
    <welcome-file>default.html</welcome-file>
    <welcome-file>default.htm</welcome-file>
    <welcome-file>default.jsp</welcome-file>
  </welcome-file-list>
  <!-- 配置Struts2过滤器 -->
    <filter>
        <filter-name>struts2</filter-name>
        <filter-class>org.apache.struts2.dispatcher.filter.StrutsPrepareAndExecuteFilter</filter-class>
    </filter>
    <filter-mapping>
        <filter-name>struts2</filter-name>
        <url-pattern>*.action</url-pattern>
    </filter-mapping>
      <filter-mapping>
        <filter-name>struts2</filter-name>
        <url-pattern>*.jsp</url-pattern>
    </filter-mapping>

</web-app>

 1 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
 2   <modelVersion>4.0.0</modelVersion>
 3   <groupId>teststruts2maven2</groupId>
 4   <artifactId>teststruts2maven2</artifactId>
 5   <version>0.0.1-SNAPSHOT</version>
 6   <dependencies>
 7       <dependency>
 8           <groupId>javax.servlet</groupId>
 9           <artifactId>servlet-api</artifactId>
10           <version>2.5</version>
11       </dependency>
12       <dependency>
13           <groupId>org.apache.struts</groupId>
14           <artifactId>struts2-core</artifactId>
15           <version>2.5.16</version>
16       </dependency>
17   </dependencies>
18 </project>