JavaWeb_(Struts2框架)參數傳遞之接收參數與傳遞參數

時間  2019-11-18
標籤 javaweb struts2 struts 框架 參數 傳遞 接收 欄目 Java 简体版
原文   原文鏈接

 

 

　　此係列博文基於同一個項目已上傳至github　　傳送門javascript

　　JavaWeb_(Struts2框架)Struts建立Action的三種方式　　傳送門css

　　JavaWeb_(Struts2框架)struts.xml核心配置、動態方法調用、結果集的處理　　傳送門html

　　JavaWeb_(Struts2框架)Log4j的配置以及解決中文亂碼　　傳送門java

　　JavaWeb_(Struts2框架)參數傳遞之接收參數與傳遞參數　　傳送門git

　　JavaWeb_(Struts2框架)Ognl小案例查詢帖子　　傳送門github

　　JavaWeb_(Struts2框架)Action中struts-default下result的各類轉發類型　　傳送門web

　　JavaWeb_(Struts2框架)攔截器interceptor　　傳送門apache

 

 

1、接收參數安全

　　第一種方法session

　　【經常使用】一、繼承implements ModelDriven<User>

public class UserAction extends ActionSupport implements ModelDriven<User>{

 

　　　　　　二、建立一個對象，不要加get()和set()方法

public User user = new User();

 

　　　　　　三、實現getModel()方法

    @Override
    public User getModel() {
        // TODO Auto-generated method stub
        return user;
    }

 

 

package com.Gary.web;

import org.apache.struts2.ServletActionContext;

import com.Gary.domain.User;
import com.Gary.service.UserService;
import com.opensymphony.xwork2.ActionSupport;
import com.opensymphony.xwork2.ModelDriven;

public class UserAction extends ActionSupport implements ModelDriven<User>{

    public User user = new User();
    
    
    
    public String login() throws Exception {
        
        System.out.println("login()方法");
        System.out.println(user.getUsername());
        UserService userService = new UserService();
        boolean success = userService.findUser(user);
        if(success)
        {
            return "success";
        }else{
            ServletActionContext.getRequest().setAttribute("error", "用戶名或密碼錯誤！！！");
            return "error";
        }
            
    }
    
    //註冊
    public String register() throws Exception {
        
        System.err.println("register()方法");
        
        return null;
    }

    //kill方法
    public String kill() throws Exception {
        
        System.err.println("kill()方法");
        
        return null;
    }
    
    @Override
    public User getModel() {
        // TODO Auto-generated method stub
        return user;
    }
}
UserAction.java

 

 

　　第二種方法

　　一、添加屬性驅動

//添加屬性驅動
    public String username;
    public 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;
    }

 

 

package com.Gary.web;

import org.apache.struts2.ServletActionContext;

import com.Gary.domain.User;
import com.Gary.service.UserService;
import com.opensymphony.xwork2.ActionSupport;
import com.opensymphony.xwork2.ModelDriven;

public class UserAction extends ActionSupport{

    //public User user = new User();
    
    //添加屬性驅動
    public String username;
    public 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;
    }

    public String login() throws Exception {
        
        System.out.println("login()方法");
        System.out.println(username+":"+ password);
        
        User user = new User();
        user.setUsername(username);
        user.setPassword(password);
        
        UserService userService = new UserService();
        boolean success = userService.findUser(user);
        if(success)
        {
            return "success";
        }else{
            ServletActionContext.getRequest().setAttribute("error", "用戶名或密碼錯誤！！！");
            return "error";
        }
            
    }
    
    //註冊
    public String register() throws Exception {
        
        System.err.println("register()方法");
        
        return null;
    }

    //kill方法
    public String kill() throws Exception {
        
        System.err.println("kill()方法");
        
        return null;
    }

}
UserAction.java

 

 

　　第三種方法

　　在login.jsp中修改登錄和註冊標籤框

                <label for="username" class="username_label"> 用 戶 名 <input maxlength="20" name="user.username" type="text" placeholder="您的用戶名和登陸名" />
                </label>

 

                <label for="username" class="other_label"> 設 置 密 碼 <input maxlength="20" type="password" name="user.password" placeholder="建議至少使用兩種字符組合" />
                </label>

 

　　UserAction.java中直接經過user.getUsername()和user.setUsername()直接獲得前臺獲取到的值

public User user;

    public User getUser() {
        return user;
    }

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

    public String login() throws Exception {
        
        System.out.println("login()方法");
        System.out.println(user.getUsername()+":"+ user.getPassword());
        
        
        UserService userService = new UserService();
        boolean success = userService.findUser(user);
        if(success)
        {
            return "success";
        }else{
            ServletActionContext.getRequest().setAttribute("error", "用戶名或密碼錯誤！！！");
            return "error";
        }
            
    }

 

 

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>

<head>
<meta charset="UTF-8">

<link rel="stylesheet" href="css/head.css" />
<link rel="stylesheet" type="text/css" href="css/login.css" />
</head>

<body>
    <div class="dvhead">
        <div class="dvlogo">
            <a href="index.html">你問我答</a>
        </div>
        <div class="dvsearch">10秒鐘註冊帳號，找到你的同窗</div>
        <div class="dvreg">
            已有帳號，當即&nbsp;<a href="login.html">登陸</a>
        </div>
    </div>
    <section class="sec">
        <form action="${pageContext.request.contextPath }/LoginAction_login" method="post">
            <div class="register-box">
                <label for="username" class="username_label"> 用 戶 名 <input maxlength="20" name="user.username" type="text" placeholder="您的用戶名和登陸名" />
                </label>
                <div class="tips"></div>
            </div>
            <div class="register-box">
                <label for="username" class="other_label"> 設 置 密 碼 <input maxlength="20" type="password" name="user.password" placeholder="建議至少使用兩種字符組合" />
                </label>
                <div class="tips"></div>
            </div>
            <div class="arguement">
                <input type="checkbox" id="xieyi" /> 閱讀並贊成 <a href="javascript:void(0)">《你問我答用戶註冊協議》</a> <a href="register.html">沒有帳號,當即註冊</a>
                <div class="tips" style="color: red">${error}</div>
            </div>
            <div class="submit_btn">
                <button type="submit" id="submit_btn">立 即 登陸</button>
            </div>
        </form>
    </section>
    <script src="js/index.js" type="text/javascript" charset="utf-8"></script>
</body>
login.jsp

 

package com.Gary.web;

import org.apache.struts2.ServletActionContext;

import com.Gary.domain.User;
import com.Gary.service.UserService;
import com.opensymphony.xwork2.ActionSupport;
import com.opensymphony.xwork2.ModelDriven;

public class UserAction extends ActionSupport{

    public User user;

    public User getUser() {
        return user;
    }

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

    public String login() throws Exception {
        
        System.out.println("login()方法");
        System.out.println(user.getUsername()+":"+ user.getPassword());
        
        
        UserService userService = new UserService();
        boolean success = userService.findUser(user);
        if(success)
        {
            return "success";
        }else{
            ServletActionContext.getRequest().setAttribute("error", "用戶名或密碼錯誤！！！");
            return "error";
        }
            
    }
    
    //註冊
    public String register() throws Exception {
        
        System.err.println("register()方法");
        
        return null;
    }

    //kill方法
    public String kill() throws Exception {
        
        System.err.println("kill()方法");
        
        return null;
    }

}
UserAction.java

 

 

2、傳遞參數

　　在ImplAction.java中經過login()方法添加<key,value>到session域和application域中

    public String login() throws Exception
    {
        //獲得原生的request域
        //ServletActionContext.getRequest().setAttribute("username", "123");
        //ServletActionContext.getRequest().setAttribute("password", "123");
        
        ActionContext.getContext().put("username", "123");
        ActionContext.getContext().put("password", "123");
        
        //得到session
        Map<String,Object> session = ActionContext.getContext().getSession();
        session.put("mysession", "這是session域");
        //得到application
        Map<String,Object> application = ActionContext.getContext().getApplication();
        application.put("myapplication", "這是application域");
        
        //得到原生的request
        HttpServletRequest request = ServletActionContext.getRequest();
        
        //得到原生的response
        HttpServletResponse response = ServletActionContext.getResponse();
        
        return "toLogin";
    }

 

　　struts.xml中動態方法配置了action，將web層ImplAction中的login()轉發到com.Gary.web.UserAction中的login()方法

<action name="LoginAction_*" class="com.Gary.web.UserAction" method="{1}">
            <!-- 默認爲轉發  redirect設置爲重定向  -->
            <result name="success" type="redirect">/index.html</result>
            <!-- 默認爲轉發 -->
            <result name="error">/login.jsp</result>
        </action>


<action name="LoginActionImpl_*" class="com.Gary.web.ImplAction" method="{1}">
            <!-- 轉發到LoginActionDefault -->
            <result name="defaultAction" type="chain">LoginActionDefault</result>
            <!-- 重定向到Action(LoginAction_*) -->
            <result name="toLogin" type="redirectAction">
                <param name="actionName">LoginAction_login</param>
                
                <param name="username">${username}</param>
                <param name="password">${password}</param>
            </result>
        </action>

 

　　在UserAction.java中輸出放置在session域和application域中的內容

    public String login() throws Exception {
        
        System.out.println("login()方法");
        System.out.println(user.getUsername()+":"+user.getPassword());
        
        System.out.println("session域..."+ActionContext.getContext().getSession().get("mysession"));
        System.out.println("application域..."+ActionContext.getContext().getApplication().get("myapplication"));
        
        
        UserService userService = new UserService();
        boolean success = userService.findUser(user);
        
        if(success)
        {
            return "success";
        }else{
            ServletActionContext.getRequest().setAttribute("error", "用戶名或密碼錯誤！！！");
            return "error";
        }
            
    }

 

 

package com.Gary.web;

import java.util.Map;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.struts2.ServletActionContext;

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

public class ImplAction implements Action{

    @Override
    public String execute() throws Exception {
        System.out.println("這是實現了Action接口的action");
        return "defaultAction";
    }

    
    public String login() throws Exception
    {
        //獲得原生的request域
        //ServletActionContext.getRequest().setAttribute("username", "123");
        //ServletActionContext.getRequest().setAttribute("password", "123");
        
        ActionContext.getContext().put("username", "123");
        ActionContext.getContext().put("password", "123");
        
        //得到session
        Map<String,Object> session = ActionContext.getContext().getSession();
        session.put("mysession", "這是session域");
        //得到application
        Map<String,Object> application = ActionContext.getContext().getApplication();
        application.put("myapplication", "這是application域");
        
        //得到原生的request
        HttpServletRequest request = ServletActionContext.getRequest();
        
        //得到原生的response
        HttpServletResponse response = ServletActionContext.getResponse();
        
        return "toLogin";
    }
    
    
}
ImplAction.java

 

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC
    "-//Apache Software Foundation//DTD Struts Configuration 2.5//EN"
    "http://struts.apache.org/dtds/struts-2.5.dtd">
    
    
    
    
<struts>

    <constant name="struts.devMode" value="true"></constant>
    <constant name="struts.enable.DynamicMethodInvocation" value="true"></constant>

    <!-- name:配置包名 namespace:給action的訪問路徑定義一個命名空間 -->
    <package name="MyPackage" namespace="/" extends="struts-default">
        <!-- 增長動態方法調用的安全性 -->
        <global-allowed-methods>regex:.*</global-allowed-methods>
    
        <!-- action:配置action類
            name：決定了action訪問的資源名稱  servlet:url-pattern 
            class:action的完整類名
            method:指定調用action中的哪一個方法來去處理請求  -->
            
        <action name="LoginAction_*" class="com.Gary.web.UserAction" method="{1}">
            <!-- 默認爲轉發  redirect設置爲重定向  -->
            <result name="success" type="redirect">/index.html</result>
            <!-- 默認爲轉發 -->
            <result name="error">/login.jsp</result>
        </action>


        <action name="LoginActionDefault" class="com.Gary.web.DefaultAction" method="execute">
        
        </action>
        
        <action name="LoginActionImpl_*" class="com.Gary.web.ImplAction" method="{1}">
            <!-- 轉發到LoginActionDefault -->
            <result name="defaultAction" type="chain">LoginActionDefault</result>
            <!-- 重定向到Action(LoginAction_*) -->
            <result name="toLogin" type="redirectAction">
                <param name="actionName">LoginAction_login</param>
                
                <param name="username">${username}</param>
                <param name="password">${password}</param>
            </result>
        </action>
    </package>
</struts>
struts.xml

 

package com.Gary.web;

import org.apache.struts2.ServletActionContext;

import com.Gary.domain.User;
import com.Gary.service.UserService;
import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;
import com.opensymphony.xwork2.ModelDriven;

public class UserAction extends ActionSupport implements ModelDriven<User>{

    public User user = new User();
    
    
    
    public String login() throws Exception {
        
        System.out.println("login()方法");
        System.out.println(user.getUsername()+":"+user.getPassword());
        
        System.out.println("session域..."+ActionContext.getContext().getSession().get("mysession"));
        System.out.println("application域..."+ActionContext.getContext().getApplication().get("myapplication"));
        
        
        UserService userService = new UserService();
        boolean success = userService.findUser(user);
        
        if(success)
        {
            return "success";
        }else{
            ServletActionContext.getRequest().setAttribute("error", "用戶名或密碼錯誤！！！");
            return "error";
        }
            
    }
    
    //註冊
    public String register() throws Exception {
        
        System.err.println("register()方法");
        
        return null;
    }

    //kill方法
    public String kill() throws Exception {
        
        System.err.println("kill()方法");
        
        return null;
    }
    
    @Override
    public User getModel() {
        // TODO Auto-generated method stub
        return user;
    }
}
UserAction.java
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