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struts2中jsp页面传值到action的两种方式

2017-07-31 14:45 441 查看

jsp页面跟通常的html传值一样通常有两种方式

1.form表单传值

2.url方式传值

通常后台接受前端传值都是用的 request.getParameter(“username”)

但是在struts框架下可以用set方法让action自动接收也更方便

所以 action接收值也有两种方式

1.request.getParameter(“username”)

2.set

下面记录多种组合方式,大家可以根据相应的情况选择使用:

方式一 jsp中form传值username,password, action中set方法接收

<%@taglib prefix="s" uri="/struts-tags" %>
<form action="getIp/login" method="post" name="form1">
用户名：
<s:textfield name="username" />
<br />
密 码：
<s:password name="password" />
<br />
<s:submit value="提交" />
</form>

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme() + "://"
+ request.getServerName() + ":" + request.getServerPort()
+ path + "/";
%>
<%@taglib prefix="s" uri="/struts-tags" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">

<title>login page</title>

</head>
<body>
<form action="getIp/login" method="post" name="form1">
用户名：
<s:textfield name="username" />
<br />
密 码：
<s:password name="password" />
<br />
<s:submit value="提交" />
</form>
</body>
</html>

loginAction.java

package action;

import com.opensymphony.xwork2.ActionSupport;

public class loginAction extends ActionSupport {
/**
* 登录
*/
private static final long serialVersionUID = -6797327769546503535L;
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;
}

public String execute() {
System.out.println("username:" + username);
System.out.println("password:" + password);
return SUCCESS;
}

}

spring文件

action.xml

<?xml version="1.0" encoding="utf-8"?>
<!-- 指定Spring配置文件的Schema信息 -->
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:p="http://www.springframework.org/schema/p" xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:mongo="http://www.springframework.org/schema/data/mongo"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.1.xsd"> 
<!--  <bean id="testAction" class="action.TestAction">
</bean>   -->
<bean id="login" class="action.loginAction">
</bean>
</beans>

struts文件

action.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>
<package name="getIp" extends="json-default" namespace="/getIp">
<!--     <action name="testJson" class="testAction">
<result type="json"></result>
</action>
<action name="testJsp"  class="testAction">
<result name="success">/index.jsp</res
4000
ult>
</action>  -->
<action name="login"  class="login">
<result type="json"></result>
</action>
</package>
</struts>

结果

成功传值

方式二 jsp中a标签url传值username,password, action中set方法接收

<a href="getIp/login?username=123&password=123">点击传值</a>

其它部分与方式一一样

完整jsp页面代码

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme() + "://"
+ request.getServerName() + ":" + request.getServerPort()
+ path + "/";
%>

<%@taglib prefix="s" uri="/struts-tags" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">

<title>login page</title>

</head>
<body>
<form action="getIp/login" method="post" name="form1">
用户名：
<s:textfield name="username" />
<br />
密 码：
<s:password name="password" />
<br />
<s:submit value="提交" />
</form>
<a href="getIp/login?username=123&password=123">点击传值</a>
</body>
</html>

方式三 jsp中js的ajax或者jquery用url传值username,password, action中set方法接收

添加jQuery框架

<script type="text/javascript" src="js/jquery-1.10.2.min.js"></script>
<script>
$(function() {
<span style="white-space:pre">    </span>bindLogin();
});
function bindLogin() {
<span style="white-space:pre">    </span>$("#btnSubmit").bind("click",
<span style="white-space:pre">    </span>function() {<span style="white-space:pre">       </span>
<span style="white-space:pre">        </span>var txtUserName = $("#username3").val();
<span style="white-space:pre">        </span>var txtPwd = $("#password3").val();
<span style="white-space:pre">        </span>if (! (txtUserName && txtPwd)) {
<span style="white-space:pre">            </span>alert("请输入帐号和密码；");
<span style="white-space:pre">            </span>return;
<span style="white-space:pre">        </span>}
<span style="white-space:pre">        </span>$.getJSON("<%=basePath%>getIp/login?username=" + txtUserName + "&password=" + txtPwd,
<span style="white-space:pre">        </span>function(data) {<span style="white-space:pre">   </span>
<span style="white-space:pre">        </span>alert(data);<span style="white-space:pre">   </span>
<span style="white-space:pre">            </span>if (data.aaa == "fail") {
<span style="white-space:pre">                </span>alert("很抱歉,用户名不存在或者密码错误。---请确认密码");
<span style="white-space:pre">            </span>}else {
<span style="white-space:pre">                </span>window.location.href = "<%=basePath%>index.jsp";
<span style="white-space:pre">                </span>sessionValuesTemp = data.userId;
<span style="white-space:pre">            </span>}
<span style="white-space:pre">        </span>});
<span style="white-space:pre">    </span>});
}
<span style="white-space:pre">    </span>
</script>
[java] view plain copy
<div class="login_box_wrapper">
<span style="white-space:pre">        </span><div class="login_box">
<span style="white-space:pre">            </span><ul>
<span style="white-space:pre">            </span><li class="devideLine"><span>用户名</span><input type="text" class="userName" id="username3" /></li>
<span style="white-space:pre">            </span><li><span>密码</span><input type="password" class="passWord" id="password3" /></li>
<span style="white-space:pre">            </span></ul>
<span style="white-space:pre">            </span><button type="button"  id="btnSubmit">方式三提交</button>
<span style="white-space:pre">        </span></div>
<span style="white-space:pre">    </span></div>

其它部分与方式一一样

完整jsp页面代码

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme() + "://"
+ request.getServerName() + ":" + request.getServerPort()
+ path + "/";
%>

<%@taglib prefix="s" uri="/struts-tags" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>

<base href="<%=basePath%>">

<title>login page</title>
<script type="text/javascript" src="js/jquery-1.10.2.min.js"></script>

<script>
$(function() {
bindLogin();
});
function bindLogin() {
$("#btnSubmit").bind("click",
function() {
var txtUserName = $("#username3").val();
var txtPwd = $("#password3").val();
if (! (txtUserName && txtPwd)) {
alert("请输入帐号和密码；");
return;
}
$.getJSON("<%=basePath%>getIp/login?username=" + txtUserName + "&password=" + txtPwd,
function(data) {
alert(data);
if (data.aaa == "fail") {
alert("很抱歉,用户名不存在或者密码错误。---请确认密码");
}else {
window.location.href = "<%=basePath%>index.jsp";
sessionValuesTemp = data.userId;
}
});
});

}
</script>
</head>
<body>
<form action="getIp/login" method="post" name="form1">
用户名：
<s:textfield name="username" />
<br />
密 码：
<s:password name="password" />
<br />
<s:submit value="提交" />
</form>
<a href="getIp/login?username=123&password=123">点击传值</a>
<div class="login_box_wrapper">
<div class="login_box">
<ul>
<li class="devideLine"><span>用户名</span><input type="text" class="userName" id="username3" /></li>
<li><span>密码</span><input type="password" class="passWord" id="password3" /></li>
</ul>
<button type="button"  id="btnSubmit">方式三提交</button>
</div>
</div>
</body>
</html>

传值为封装类

例如我们把用户名密码封装成用户 User

User.Java

package entity;
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;
}

}

方式一

LoginAction.java中

public class loginAction extends ActionSupport{
private User user;
public  User getUser()
{ return user; }
public void setUser(User user)
{ this.user=user; } }

jsp页面中

<form action="login" method="post"name="form1">
用户名：<s:textfield name="user.username"/><br/>
密 码：<s:password  name="user.password"/><br/>
<s:submit value="提交"/>
</form>

方式二

Action类必须实现ModelDriven接口，同样把表单传来的数据封装起来，Action类中必须实例化该对象，并且要重写getModel()方法

public class loginAction extends ActionSupport implements ModelDriven<User>{
private User user =new User();
public User getModel(){
return user;
}
}

原文：http://lib.csdn.net/article/java/6776

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标签： sturts2 jsp

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