这是我的控制器
@Controller
public class MyController {
@Autowired
private LoginService loginService;
@RequestMapping("/login.do")
public String login() {
return "login";
}
@RequestMapping("/validate.do")
public String validate(HttpServletRequest request,ModelMap model) {
String name=request.getParameter("uname1");
String pwd=request.getParameter("pwd1");
boolean b=loginService.validate(name,pwd);
if (b){
model.addAttribute("name", name);
return "welcome";
}
else
return "login";
}
@RequestMapping("/register.do")
public String register() {
return "register";
}
@RequestMapping("/registration.do")
public String registration(HttpServletRequest request, @ModelAttribute("modelObject") Login entity, BindingResult result) {
String uname=entity.getUserName();
String pwd=entity.getPassword();
String sex=entity.getSex();
String dob=entity.getDob();
String nation=entity.getNation();
Login log=new Login();
log.setUserName(uname);
log.setPassword(pwd);
log.setSex(sex);
log.setDob(dob);
log.setNation(nation);
loginService.register(log);
return "login";
}
}
这是jsp页面
<form:form commandName="modelObject" action="registration.do" method="post" >
<table>
<tr>
<td><form:label path="userName">User Name</form:label></td>
<td><form:input path="userName"></form:input></td>
</tr>
<tr>
<td><form:label path="password">Password</form:label></td>
<td><form:input path="password"></form:input></td>
</tr>
<tr>
<td><form:label path="sex">Sex</form:label></td>
<td><form:radiobutton path="sex" value="M" label="M"></form:radiobutton>
<form:radiobutton path="sex" value="F" label="F"></form:radiobutton></td>
</tr>
<tr>
<td><form:label path="dob">Date of Birth</form:label></td>
<td><form:input path="dob"></form:input></td>
</tr>
<tr>
<td><form:label path="nation">Nationality</form:label></td>
<td><form:select path="nation">
<form:option value="0" label="Please Select"></form:option>
<form:options items="${countryList}" itemValue="id" itemLabel="name" />
</form:select></td>
</tr>
<tr>
<td align="right"><input type="submit" value="Submit Form"></input></td>
<td align="center"><input type="reset" value="Clear Form"></input></td>
</tr>
</table>
</form:form>
与他们一起，我收到以下错误
Feb 11, 2013 5:08:51 PM org.apache.catalina.core.StandardWrapperValve invoke
SEVERE: Servlet.service() for servlet [mode] in context with path [/SpringHb] threw exception [An exception occurred processing JSP page /WEB-INF/jsp/register.jsp at line 16
13: <form:form commandName="modelObject" action="registration.do" method="post" >
14: <table>
15: <tr>
16: <td><form:label path="userName">User Name</form:label></td>
17: <td><form:input path="userName"></form:input></td>
18: </tr>
19: <tr>
Stacktrace:] with root cause
java.lang.IllegalStateException: Neither BindingResult nor plain target object for bean name 'modelObject' available as request attribute
at org.springframework.web.servlet.support.BindStatus.<init>(BindStatus.java:141)
at org.springframework.web.servlet.tags.form.AbstractDataBoundFormElementTag.getBindStatus(AbstractDataBoundFormElementTag.java:174)
at org.springframework.web.servlet.tags.form.AbstractDataBoundFormElementTag.getPropertyPath(AbstractDataBoundFormElementTag.java:194)
at org.springframework.web.servlet.tags.form.LabelTag.autogenerateFor(LabelTag.java:129)
at org.springframework.web.servlet.tags.form.LabelTag.resolveFor(LabelTag.java:119)
at org.springframework.web.servlet.tags.form.LabelTag.writeTagContent(LabelTag.java:89)
at org.springframework.web.servlet.tags.form.AbstractFormTag.doStartTagInternal(AbstractFormTag.java:102)
at org.springframework.web.servlet.tags.RequestContextAwareTag.doStartTag(RequestContextAwareTag.java:79)
at org.apache.jsp.WEB_002dINF.jsp.register_jsp._jspx_meth_form_005flabel_005f0(register_jsp.java:282)
at org.apache.jsp.WEB_002dINF.jsp.register_jsp._jspService(register_jsp.java:114)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:432)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:684)
at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:471)
at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:402)
at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:329)
at org.springframework.web.servlet.view.InternalResourceView.renderMergedOutputModel(InternalResourceView.java:238)
at org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:250)
at org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1063)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:801)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:719)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:644)
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:560)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:641)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:224)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:169)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:928)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:987)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:539)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:300)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
at java.lang.Thread.run(Thread.java:722)
我无法理解问题所在
上面使用 spring 表单标签编写的代码显示了上述错误，但是如果我使用 html 编写相同的代码，它工作正常 下面是用 jsp 编写的 html 代码
<c:url value="/registration.do" var="reg" />
<form:form action="${reg}" >
User Name <input type="text" name="userName"/><br>
Password<input type="password" name="password"/><br>
Sex<input type="radio" name="sex" value="M"/>M<input type="radio" name="sex" value="F"/>F<br>
DOB<input type="text" name="dob"/><br>
Nationality<select name="nation">
<option value="India">India</option>
<option value="USA">USA</option>
</select><br>
<input type="submit" name="submit" value="Submit" />
<input type="reset" name="reset" value="Reset" />
</form:form>
<c:url value="/login.do" var="log" />
<form:form action="${log}" >
<input type="submit" name="Go Back" value="Go Back" />
</form:form>
请帮忙....