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JavaWeb_(Struts2框架)参数传递之接收参数与传递参数
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此系列博文基于同一个项目已上传至github传送门
JavaWeb_(Struts2框架)Struts创建Action的三种方式传送门
JavaWeb_(Struts2框架)struts.xml核心配置、动态方法调用、结果集的处理传送门
JavaWeb_(Struts2框架)Log4j的配置以及解决中文乱码传送门
JavaWeb_(Struts2框架)参数传递之接收参数与传递参数传送门
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JavaWeb_(Struts2框架)Action中struts-default下result的各种转发类型传送门
JavaWeb_(Struts2框架)拦截器interceptor传送门
一、接收参数
第一种方法
【常用】1、继承implements ModelDriven<User>
public class UserAction extends ActionSupport implements ModelDriven<User>{
2、创建一个对象，不要加get()和set()方法
public User user = new User();
3、实现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", "用户名或密码错误！！！");
return "error";
} } //注册
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
第二种方法
1、添加属性驱动
//添加属性驱动
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(); //添加属性驱动
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", "用户名或密码错误！！！");
return "error";
} } //注册
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
第三种方法
在login.jsp中修改登陆和注册标签框
<label for="username" class="username_label"> 用 户 名 <input maxlength="20" name="user.username" type="text" placeholder="您的用户名和登录名" />
</label>
<label for="username" class="other_label"> 设 置 密 码 <input maxlength="20" type="password" name="user.password" placeholder="建议至少使用两种字符组合" />
</label>
UserAction.java中直接通过user.getUsername()和user.setUsername()直接得到前台获取到的值
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", "用户名或密码错误！！！");
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">你问我答</a>
</div>
<div class="dvsearch">10秒钟注册账号，找到你的同学</div>
<div class="dvreg">
已有账号，立即 <a href="login.html">登录</a>
</div>
</div>
<section class="sec">
<form action="${pageContext.request.contextPath }/LoginAction_login" method="post">
<div class="register-box">
<label for="username" class="username_label"> 用 户 名 <input maxlength="20" name="user.username" type="text" placeholder="您的用户名和登录名" />
</label>
<div class="tips"></div>
</div>
<div class="register-box">
<label for="username" class="other_label"> 设 置 密 码 <input maxlength="20" type="password" name="user.password" placeholder="建议至少使用两种字符组合" />
</label>
<div class="tips"></div>
</div>
<div class="arguement">
<input type="checkbox" id="xieyi" /> 阅读并同意 <a href="javascript:void(0)">《你问我答用户注册协议》</a> <a href="register.html">没有账号,立即注册</a>
<div class="tips" style="color: red">${error}</div>
</div>
<div class="submit_btn">
<button type="submit" id="submit_btn">立 即 登录</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", "用户名或密码错误！！！");
return "error";
} } //注册
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
二、传递参数
在ImplAction.java中通过login()方法添加<key,value>到session域和application域中
public String login() throws Exception
{
//得到原生的request域
//ServletActionContext.getRequest().setAttribute("username", "123");
//ServletActionContext.getRequest().setAttribute("password", "123"); ActionContext.getContext().put("username", "123");
ActionContext.getContext().put("password", "123"); //获得session
Map<String,Object> session = ActionContext.getContext().getSession();
session.put("mysession", "这是session域");
//获得application
Map<String,Object> application = ActionContext.getContext().getApplication();
application.put("myapplication", "这是application域"); //获得原生的request
HttpServletRequest request = ServletActionContext.getRequest(); //获得原生的response
HttpServletResponse response = ServletActionContext.getResponse(); return "toLogin";
}
struts.xml中动态方法配置了action，将web层ImplAction中的login()转发到com.Gary.web.UserAction中的login()方法
<action name="LoginAction_*" class="com.Gary.web.UserAction" method="{1}">
<!-- 默认为转发 redirect设置为重定向 -->
<result name="success" type="redirect">/index.html</result>
<!-- 默认为转发 -->
<result name="error">/login.jsp</result>
</action><action name="LoginActionImpl_*" class="com.Gary.web.ImplAction" method="{1}">
<!-- 转发到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中输出放置在session域和application域中的内容
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", "用户名或密码错误！！！");
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("这是实现了Action接口的action");
return "defaultAction";
} public String login() throws Exception
{
//得到原生的request域
//ServletActionContext.getRequest().setAttribute("username", "123");
//ServletActionContext.getRequest().setAttribute("password", "123"); ActionContext.getContext().put("username", "123");
ActionContext.getContext().put("password", "123"); //获得session
Map<String,Object> session = ActionContext.getContext().getSession();
session.put("mysession", "这是session域");
//获得application
Map<String,Object> application = ActionContext.getContext().getApplication();
application.put("myapplication", "这是application域"); //获得原生的request
HttpServletRequest request = ServletActionContext.getRequest(); //获得原生的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:给action的访问路径定义一个命名空间 -->
<package name="MyPackage" namespace="/" extends="struts-default">
<!-- 增加动态方法调用的安全性 -->
<global-allowed-methods>regex:.*</global-allowed-methods> <!-- action:配置action类
name：决定了action访问的资源名称 servlet:url-pattern
class:action的完整类名
method:指定调用action中的哪个方法来去处理请求 --> <action name="LoginAction_*" class="com.Gary.web.UserAction" method="{1}">
<!-- 默认为转发 redirect设置为重定向 -->
<result name="success" type="redirect">/index.html</result>
<!-- 默认为转发 -->
<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}">
<!-- 转发到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", "用户名或密码错误！！！");
return "error";
} } //注册
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
