关于struts的set get方法
最近在做一个当当网项目有一个前台注册页面传输数据给后台action
我记得前台传输数据给后台action只调用 set方法吧
但是去掉get方法后一直报空指针
不知道什么原因
package org.tarena.dang.action.user;
import org.tarena.dang.action.BaseAction;
import org.tarena.dang.dao.JdbcUserDAO;
import org.tarena.dang.dao.UserDAO;
import org.tarena.dang.entity.User;
import org.tarena.dang.util.Constant;
import org.tarena.dang.util.EmailUtil;
import org.tarena.dang.util.EncryptUtil;
import org.tarena.dang.util.VerifyUtil;
public class RegisterAction extends BaseAction{
//input
private User user;
//output
public String execute() {
//密码加密
System.out.println(user.getNickname());
System.out.println(user.getPassword());
System.out.println(user.getEmail());
String pwd = EncryptUtil.md5Encrypt(
user.getPassword());
user.setPassword(pwd);
//设置用户初始信息
user.setUserIntegral(Constant.NORMAL);
user.setEmailVerify(Constant.NO);
user.setLastLoginTime(
System.currentTimeMillis());
user.setLastLoginIp(httpReq.getRemoteAddr());
//生成一个邮箱验证码
String code = VerifyUtil.createCode();
user.setEmailVerifyCode(code);
//将user写入d_user
UserDAO userDao = new JdbcUserDAO();
try {
userDao.save(user);
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
//发送邮箱验证码
EmailUtil.sendEmail(user.getEmail(), code);
return "verify";//进入邮箱验证页面
}
public void setUser(User user) {
this.user = user;
}
} --------------------编程问答-------------------- 报错
null
weresd
null
java.sql.SQLException: Column 'email' cannot be null
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:2847)
at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1531)
at com.mysql.jdbc.ServerPreparedStatement.serverExecute(ServerPreparedStatement.java:1347)
at com.mysql.jdbc.ServerPreparedStatement.executeInternal(ServerPreparedStatement.java:958)
at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:1957)
at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:1880)
at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:1741)
at org.apache.commons.dbcp.DelegatingPreparedStatement.executeUpdate(DelegatingPreparedStatement.java:102)
at org.tarena.dang.dao.JdbcUserDAO.save(JdbcUserDAO.java:33)
at org.tarena.dang.action.user.RegisterAction.execute(RegisterAction.java:42)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at com.opensymphony.xwork2.DefaultActionInvocation.invokeAction(DefaultActionInvocation.java:441)
at com.opensymphony.xwork2.DefaultActionInvocation.invokeActionOnly(DefaultActionInvocation.java:280)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:243)
at com.opensymphony.xwork2.interceptor.DefaultWorkflowInterceptor.doIntercept(DefaultWorkflowInterceptor.java:165)
at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
at com.opensymphony.xwork2.validator.ValidationInterceptor.doIntercept(ValidationInterceptor.java:252)
at org.apache.struts2.interceptor.validation.AnnotationValidationInterceptor.doIntercept(AnnotationValidationInterceptor.java:68)
at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
at com.opensymphony.xwork2.interceptor.ConversionErrorInterceptor.intercept(ConversionErrorInterceptor.java:122)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
at com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:195)
at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
at com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:195)
at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
at com.opensymphony.xwork2.interceptor.StaticParametersInterceptor.intercept(StaticParametersInterceptor.java:179)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
at org.apache.struts2.interceptor.MultiselectInterceptor.intercept(MultiselectInterceptor.java:75)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
at org.apache.struts2.interceptor.CheckboxInterceptor.intercept(CheckboxInterceptor.java:94)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
at org.apache.struts2.interceptor.FileUploadInterceptor.intercept(FileUploadInterceptor.java:235)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
at com.opensymphony.xwork2.interceptor.ModelDrivenInterceptor.intercept(ModelDrivenInterceptor.java:89)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
at com.opensymphony.xwork2.interceptor.ScopedModelDrivenInterceptor.intercept(ScopedModelDrivenInterceptor.java:130)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
at org.apache.struts2.interceptor.debugging.DebuggingInterceptor.intercept(DebuggingInterceptor.java:267)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
at com.opensymphony.xwork2.interceptor.ChainingInterceptor.intercept(ChainingInterceptor.java:126)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
at com.opensymphony.xwork2.interceptor.PrepareInterceptor.doIntercept(PrepareInterceptor.java:138)
at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
at com.opensymphony.xwork2.interceptor.I18nInterceptor.intercept(I18nInterceptor.java:165)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
at org.apache.struts2.interceptor.ServletConfigInterceptor.intercept(ServletConfigInterceptor.java:164)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
at com.opensymphony.xwork2.interceptor.AliasInterceptor.intercept(AliasInterceptor.java:179)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
at com.opensymphony.xwork2.interceptor.ExceptionMappingInterceptor.intercept(ExceptionMappingInterceptor.java:176)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
at org.apache.struts2.impl.StrutsActionProxy.execute(StrutsActionProxy.java:52)
at org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:488)
at org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction(ExecuteOperations.java:77)
at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:91)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:861)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:606)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
at java.lang.Thread.run(Thread.java:619) --------------------编程问答-------------------- <%@page contentType="text/html;charset=utf-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>生成订单 - 当当网</title>
<link href="../css/login.css" rel="stylesheet" type="text/css" />
<link href="../css/page_bottom.css" rel="stylesheet" type="text/css" />
</head>
<body>
<%@include file="../common/head1.jsp"%>
<div class="login_step">
生成订单骤: 1.确认订单 >
<span class="red_bold"> 2.填写送货地址</span> > 3.订单成功
</div>
<div class="fill_message">
<p>
选择地址：
<select id="address">
<option>
填写新地址
</option>
</select>
</p>
<form name="ctl00" method="get" action="order_ok.jsp" id="f">
<input type="hidden" name="id" id="addressId" />
<table class="tab_login">
<tr>
<td valign="top" class="w1">
收件人姓名：
</td>
<td>
<input type="text" class="text_input" name="receiveName"
id="receiveName" />
<div class="text_left" id="nameValidMsg">
<p>
请填写有效的收件人姓名
</p>
</div>
</td>
</tr>
<tr>
<td valign="top" class="w1">
收件人详细地址：
</td>
<td>
<input type="text" name="fullAddress" class="text_input"
id="fullAddress" />
<div class="text_left" id="addressValidMsg">
<p>
请填写有效的收件人的详细地址
</p>
</div>
</td>
</tr>
<tr>
<td valign="top" class="w1">
邮政编码
</td>
<td>
<input type="text" class="text_input" name="postalCode"
id="postalCode" />
<div class="text_left" id="codeValidMsg">
<p>
请填写有效的收件人的邮政编码
</p>
</div>
</td>
</tr>
<tr>
<td valign="top" class="w1">
电话
</td>
<td>
<input type="text" class="text_input" name="phone"
id="phone" />
<div class="text_left" id="phoneValidMsg">
<p>
请填写有效的收件人的电话
</p>
</div>
</td>
</tr>
<tr>
<td valign="top" class="w1">
手机
</td>
<td>
<input type="text" class="text_input" name="mobile"
id="mobile" />
<div class="text_left" id="mobileValidMsg">
<p>
请填写有效的收件人的手机
</p>
</div>
</td>
</tr>
</table>
<div class="login_in">
<a href="order_info.jsp"><input id="btnClientRegister" class="button_1" name="submit"
type="submit" value="取消" /></a>
<input id="btnClientRegister" class="button_1" name="submit"
type="submit" value="下一步" />
</div>
</form>
</div>
<%@include file="../common/foot1.jsp"%>
</body>
</html>
--------------------编程问答-------------------- 不好意思 前端页面写错了
是这个
<%@page contentType="text/html;charset=utf-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>用户注册 - 当当网</title>
<link href="../css/login.css" rel="stylesheet" type="text/css" />
<link href="../css/page_bottom.css" rel="stylesheet" type="text/css" />
<script type="text/javascript"
src="../js/jquery-1.4.3.js"></script>
<script type="text/javascript">
var email_flag = false;
var nickname_flag = false;
//表单校验
$(function(){
//邮箱检验
$("#txtEmail").blur(function(){
email_flag = false;
//清空提示消息
$("#email\\.info").html("");
//1.非空检查
var email = $("#txtEmail").val();
if(email == ""){
$("#email\\.info").html("邮箱不能为空");
return;
}
//2.格式检查
var pattern=/\b(^['_A-Za-z0-9-]+(\.['_A-Za-z0-9-]+)*@([A-Za-z0-9-])+(\.[A-Za-z0-9-]+)*((\.[A-Za-z0-9]{2,})|(\.[A-Za-z0-9]{2,}\.[A-Za-z0-9]{2,}))$)\b/;
if(!pattern.test(email)){
$("#email\\.info").html("邮箱格式错误");
return;
}
//3.唯一性检查
$.post(
"checkEmail.action",
{"email":email},
function(data){//获取返回的ok值
if(data){//可用
$("#email\\.info").html("邮箱可用");
email_flag = true;//邮箱通过检测
}else{//被占用
$("#email\\.info").html("邮箱被占用");
}
}
);
});
});
//表单提交事件处理
$(function(){
$("#register_form").submit(function(){
//判断各个表单项是否通过检查
// return email_flag&&nickname_flag&&;
if(!email_flag){
alert("表单信息有错或正在检测中...");
return false;
}
return true;
});
});
</script>
</head>
<body>
<%@include file="../common/head1.jsp"%>
<div class="login_step">
注册步骤:
<span class="red_bold">1.填写信息</span> > 2.验证邮箱 > 3.注册成功
</div>
<div class="fill_message">
<form name="ctl00" method="post"
action="register.action" id="register_form">
<h2>
以下均为必填项
</h2>
<table class="tab_login" >
<tr>
<td valign="top" class="w1">
请填写您的Email地址：
</td>
<td>
<input name="user.email" type="text" id="txtEmail" class="text_input"/>
<div class="text_left" id="emailValidMsg">
<p>
请填写有效的Email地址，在下一步中您将用此邮箱接收验证邮件。
</p>
<span id="email.info" style="color:red"></span>
</div>
</td>
</tr>
<tr>
<td valign="top" class="w1">
设置您在当当网的昵称：
</td>
<td>
<input name="user.nickname" type="text" id="txtNickName" class="text_input" />
<div class="text_left" id="nickNameValidMsg">
<p>
您的昵称可以由小写英文字母、中文、数字组成，
</p>
<p>
长度4－20个字符，一个汉字为两个字符。
</p>
<span id="name.info" style="color:red"></span>
</div>
</td>
</tr>
<tr>
<td valign="top" class="w1">
设置密码：
</td>
<td>
<input name="user.password" type="password" id="txtPassword"
class="text_input" />
<div class="text_left" id="passwordValidMsg">
<p>
您的密码可以由大小写英文字母、数字组成，长度6－20位。
</p>
<span id="password.info" style="color:red"></span>
</div>
</td>
</tr>
<tr>
<td valign="top" class="w1">
再次输入您设置的密码：
</td>
<td>
<input name="password1" type="password" id="txtRepeatPass"
class="text_input"/>
<div class="text_left" id="repeatPassValidMsg">
<span id="password1.info" style="color:red"></span>
</div>
</td>
</tr>
<tr>
<td valign="top" class="w1">
验证码：
</td>
<td>
<img class="yzm_img" id='imgVcode' src="#" />
<input name="number" type="text" id="txtVerifyCode"
class="yzm_input"/>
<div class="text_left t1">
<p class="t1">
<span id="vcodeValidMsg">请输入图片中的四个字母。</span>
<span id="number.info" style="color:red"></span>
<a href="#" >看不清楚？换个图片</a>
</p>
</div>
</td>
</tr>
</table>
<div class="login_in">
<input id="btnClientRegister" class="button_1" name="submit" type="submit" value="注 册"/>
</div>
</form>
</div>
<%@include file="../common/foot1.jsp"%>
</body>
</html>
--------------------编程问答-------------------- 你数据库字段emaill是设置的is null，不为空吗！
然后确定一下字段名称！ --------------------编程问答-------------------- null说的是这个java.sql.SQLException: Column 'email' cannot be null
你数据库那张表表email列不能为空，就是你插入数据时user.email为空了 --------------------编程问答-------------------- email字段没问题啊
而且设为非空
现在主要问题是后台action接收不到前台 参数 --------------------编程问答--------------------
你把这个字段设为非空 在插入的时候后台user对象没获取到email属性的值 就报空指针异常了
这个跟get set方法没关系吧 楼主最好断点跟踪看一下email的在哪消失的 有没有进入后台 --------------------编程问答-------------------- 看错误，跟get/set方法没什么关系，是SQL执行错误，看看email是不是为空？ --------------------编程问答-------------------- 你用的是struts1？ 你的确定你的user类中的属性都有标准的set/get方法，另外确定你的user类中的属性名和你页面中<input name="user.xxxx" .../> 是一样的。 --------------------编程问答-------------------- 除 --------------------编程问答-------------------- 用struts2的 user属性set get都设置了
user类中的属性名和你页面中<input name="user.xxxx" .../> 也是一样的
前台user中参数 测试下来只有password传输过来
但是把getUser这个方法加上后 就没问题了
但前台传参数到后台 我记得是用不到get方法吧 --------------------编程问答-------------------- 测试下来
前台jsp页面传参数到后台action 是要调用action中getuser方法的 --------------------编程问答-------------------- 偶也遇到过 没仔细去看 猜想应该是在赋值的时候要先通过get去获取user对象吧 在给它赋值 --------------------编程问答-------------------- 达内暴露无疑啊！！异常显示的是那么准确 --------------------编程问答-------------------- 楼上慧眼如炬啊..
补充：Java , Java EE
