struts中把后台对象传到前台jsp页面上的方法
Struts中的对象传到前台，一般都会用:
request.setAttribute("modifyAccount", modifyAccount);
整体代码如下：
public ActionForward toUpdateAccount(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response)throws Exception {
User user = (User)getUser();
if(user==null){
throw new NotLoginException();
}
int accountId = StringUtil.getIntValue(request.getParameter("accountId"),0);
Account modifyAccount = accountService.find(accountId);
if(modifyAccount==null){
this.renderText(response, "false,该账户已被删除。");
return null;
}
bindForm(form,modifyAccount);
request.setAttribute("modifyAccount", modifyAccount);
return mapping.findForward("modifyAccount");
}
要想在前台jsp页面上获得这个modifyAccount对象，有几种方式（这个jsp，是在struts的配置文件中配置好的对应mapping.findForward("modifyAccount")的jsp文件）：
1.可直接这样写：
${(empty modifyAccount )?"新建账号":"修改账号" }
可直接引用request.setAttribute("modifyAccount", modifyAccount);中的"modifyAccount",注意必须同名
2.可以先在jsp文件的开头引入java代码，获得对象，然后在jsp文件里面这样使用:<%=account.userId %>
先使用java代码获得对象：
<%@page import="com.autonavi.monitor.model.Account;"%>
<%
Account account = (Account)request.getAttribute("modifyAccount");
%>
这样在下面直接这样使用就行了：
<input type="text" id="department" name="department" value="<%=account.getDepartment() %>" />
注意value的值一定要加上<%= %>
3.也可以这样写，可直接获得对象的值，但要注意property的值必须跟对象的属生名一致：
<html:text property="userName" styleId="userName" ></html:text>
4.Struts1标签使用方法:
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ taglib uri="http://struts.apache.org/tags-bean" prefix="bean"%>
<%@ taglib uri="http://struts.apache.org/tags-html" prefix="html"%>
<%@ taglib uri="http://struts.apache.org/tags-logic" prefix="logic"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" >
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>struts1标签</title>
</head>
<body>
<html:form action="output">
<font color="blue">html:text标签：</font><br/>
name属性为默认form：<html:text property="username"/>name属性非当前form：<html:text property="teacherName" name="grade" /><hr/>
<font color="blue">html:select标签：</font><hr/>
optionsCollection:
<html:select property="username">
<html:optionsCollection name="userList" label="username" value="userID"/>
</html:select>
options:
<html:select property="username">
<html:options collection="userList" property="userID" labelProperty="username"/>
</html:select>
</html:form><hr/>
<font color="blue">logic:empty标签：</font><hr/>
logic:empty：<logic:empty name="grade" scope="request">
<span onclick="javascript:alert('request中不存在班级！')"></span>
</logic:empty>
logic:notEmpty：<logic:notEmpty name="grade" scope="session">
<span onclick="alert('session中存在班级')"></span>
</logic:notEmpty><hr/>
<font color="blue">logic:equals标签：</font><br/>
<c:forEach items="${requestScope.userList}" var="usr">
${usr.username }
<logic:equal name="usr" property="userID" value="${sessionScope.currUser.userID}">
<a href="#">编辑个人信息</a>
</logic:equal> <br/>
</c:forEach><br/>
<font color="blue">logic:iterate标签：</font><br/>
<logic:iterate id="usr" name="userList">
${usr.username } <c:out value="${usr.birth}"></c:out><br/>
</logic:iterate><hr/>
<font color="blue">bean:wirte标签：</font><br/>
<logic:iterate id="usr" name="userList">
<bean:write name="usr" property="username"/>
<bean:write name="usr" property="score" format="#,###"/>
<bean:write name="usr" property="birth" format="yyyy年MM月dd日"/><br/>
</logic:iterate><hr/>
<font color="blue">bean:define标签：</font><br/>
传统获取记录条数：
<%=((java.util.List)request.getAttribute("userList")).size() %><br/>
bean标签获取记录条数：
<bean:define scope="request" id="dataList" name="userList" type="java.util.List" />
<%=dataList.size() %><hr/>
<font color="blue">bean:size标签：</font><hr/>
bean标签获取记录条数：
<bean:size id="count" name="userList"/>
${count }
<pre>
User对象的字段有：
private int userID;
private String username;
private Date birth;
private Double score;
Teacher对象的字段有：
private int graID;
private String gradeName;
private String teacherName;
//以下是在跳转到当前页面之前的action处理方法：
public ActionForward doShow(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response) {
System.out.println("到达action");
SimpleDateFormat fmt = new SimpleDateFormat("yyyy-MM-dd");
UserForm userForm = (UserForm) form;
userForm.setUserID(22);
userForm.setUsername("TZ");
try {
userForm.setBirth(fmt.parse("2004-5-5"));
} catch (ParseException ex1) {
ex1.printStackTrace();
}
List<User> list = new ArrayList<User>();
try {
list.add(new User(1, "Urey", fmt.parse("2009-10-1"),330.0));
list.add(new User(2, "Protoss", fmt.parse("2010-1-1"),11110.0));
list.add(new User(3, "BlackWinter", fmt.parse("2008-5-5"),3444.0));
request.setAttribute("userList", list);
request.getSession().setAttribute("currUser",
new User(2, "Protoss", fmt.parse("2010-1-1"),4050.0));
Grade grade = new Grade(1, "T64", "Miss Gao");
request.getSession().setAttribute("grade", grade);
} catch (ParseException ex) {
ex.printStackTrace();
}
return mapping.findForward("ok");//在配置文件中设置的"ok"转向为当前页面
}
</pre>
</body>
</html>
修改账户的jsp文件：
<%@ page contentType="text/html;charset=utf-8"%>
<%@page import="com.autonavi.monitor.model.Account;"%>
<%@ include file="/pages/common/global.jsp"%>
<%
Account account = (Account)request.getAttribute("modifyAccount");
%>
<html:form action="/accountAction.do?method=saveModifyAccount">
<table class="form_t">
<tr>
<th style="text-align:left;" class="tablelogo" colspan="2">
${(empty modifyAccount )?"新建账号":"修改账号" }
<html:hidden property="accountId"/>
</th>
</tr>
<tr>
<td style="text-align:right;">
职工编号
</td>
<td><span class="square">|</span> <html:text property="userId" styleId="userId" readonly="true"></html:text>
</td>
</tr>
<tr>
<td style="text-align:right;">
职工姓名
</td>
<td><span class="square">|</span> <html:text property="userName" styleId="userName" readonly="true"></html:text>
</td>
</tr>
<tr>
<td style="text-align:right;">
部 门
</td>
<td><span class="square">|</span> <input type="text" id="department" name="department" readonly="true" value="<%=account.getDepartment() %>" />
</td>
</tr>
<tr>
<td style="text-align:right;">
申请人
</td>
<td><span class="square">|</span> <html:text property="applicant" styleId="applicant" readonly="true"></html:text>
</td>
</tr>
<tr>
<td style="text-align:right;">
申请原因
</td>
<td><span class="square">|</span> <html:text property="reason" styleId="reason"></html:text>
</td>
</tr>
<tr>
<td style="text-align:right;">
账号启用时间 </td>
<td><span class="square">|</span> <html:text property="startTime" styleId="startTime" readonly="true"></html:text>
</td>
</tr>
<tr>
<td style="text-align:right;">
账号停用时间 </td>
<td><span class="square">|</span>
<input type="text" name="endDate_s" id="endDate_s" class="Wdate" style="cursor:pointer;" value="<%=account.getStopTime() %>"
onclick="WdatePicker({dateFmt:'yyyy-MM-dd HH:mm:ss',minDate:'%y-%M-%d %H:%m:%s'})" />
</td>
</tr>
<tr>
<td> </td><td>
<input type="button" value="保存" onclick="javascript:saveAccount(this.form,'actionDiv');" class="buttonC" style="cursor:pointer;"/>
<input type="button" onclick="javascript:retrieveURL('${contextPath}/accountAction.do?method=accountList','actionDiv');$('#chance_search_div').show();" value="取消" class="buttonC" style="cursor:pointer;"/>
</td>
</tr>
<tr><td></td><td></td></tr>
</table>
</html:form>
<script><!--
function saveAccount(thisForm,actionDiv){
if($("#startDate_s").val()==""){
alert("请选择账号启用时间。");
$("#startDate_s").val("");
$("#startDate_s").focus();
return false;
}
if($("#endDate_s").val()==""){
alert("请选择账号停用时间。");
$("#endDate_s").val("");
$("#endDate_s").focus();
return false;
}
submitForm(thisForm,"",afterSaveAccount);
}
function afterSaveAccount(content){
if(content!=null&&content!=""){
var arr = content.split(",");
alert(arr[1]);
if(arr[0]=="true"){
$("#chance_search_div").show();
retrieveURL("${contextPath}/accountAction.do?method=accountList","actionDiv");
}
}
}
function checkUserId(url,thisObj){
url += thisObj.value;
retrieveURL(url,null,null,afterCheckUserId);
}
function afterCheckUserId(content){
if(content!=null&&content!=""){
var arr = content.split(",");
if(arr[0]=="false"){
alert(arr[1]);
$("#userId_s").val("");
$("#userId_s").focus();
}
}
}
--></script>