这段时间在搞SpringMVC , 觉得 他比较灵魂,不过 好像资料没有struts那样多
在我做练习的时候, 我就约到了在表单当中遇到了提交日期给controller 的问题了
当我提交表单的时候 就出现 java.lang.NullPointerException
说我 Emp toString方法 那个出错了 (就是那个 Date hireDate 没有获取到值,)迷茫中
大家先看看代码吧:
Emp: private int empNo;
private String name;
private String phone;
private Date hireDate;
//getter and setterpublic String toString() {
return getEmpNo() + getName() + " " + getPhone() + " "+ new SimpleDateFormat("yyyy-MM-dd").format(hireDate);
}
EmpController:public class EmpController extends AbstractCommandController { @Override
protected ModelAndView handle(HttpServletRequest request,
HttpServletResponse response, Object command, BindException arg3)
throws Exception {
Emp emp = (Emp) command;
System.out.println(emp.toString());
System.out.println(emp.getHireDate());
return new ModelAndView("succ");@Override
protected void initBinder(HttpServletRequest request,
ServletRequestDataBinder binder) throws Exception {
binder.registerCustomEditor(Date.class, new CustomDateEditor(
new SimpleDateFormat("yyyy-MM-dd"), true));
}
}add_emp.jsp<form action="add.do" method="post">
no : <input name="empNo" type="text" /><br/>
name:
<input name="name" type="text" /><br/>
phone:
<input name="phone" type="text" /><br/>
date:
<input name="hireDate" type="text" /><br/>
<input type="submit" value="add" />
</form> <bean id="mappings"
class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
<property name="mappings">
<props>
<prop key="add_emp.do">addEmpController</prop>
<prop key="add.do">addEmpSuccController</prop>
</props>
</property>
</bean> <bean id="addEmpController"
class="org.springframework.web.servlet.mvc.UrlFilenameViewController"> </bean> <bean id="addEmpSuccController" class="demo.controller.EmpController">
<property name="commandClass" value="demo.controller.Emp"></property>
</bean>
<bean
class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/jsp/" />
<property name="suffix" value=".jsp" />
</bean>
在我做练习的时候, 我就约到了在表单当中遇到了提交日期给controller 的问题了
当我提交表单的时候 就出现 java.lang.NullPointerException
说我 Emp toString方法 那个出错了 (就是那个 Date hireDate 没有获取到值,)迷茫中
大家先看看代码吧:
Emp: private int empNo;
private String name;
private String phone;
private Date hireDate;
//getter and setterpublic String toString() {
return getEmpNo() + getName() + " " + getPhone() + " "+ new SimpleDateFormat("yyyy-MM-dd").format(hireDate);
}
EmpController:public class EmpController extends AbstractCommandController { @Override
protected ModelAndView handle(HttpServletRequest request,
HttpServletResponse response, Object command, BindException arg3)
throws Exception {
Emp emp = (Emp) command;
System.out.println(emp.toString());
System.out.println(emp.getHireDate());
return new ModelAndView("succ");@Override
protected void initBinder(HttpServletRequest request,
ServletRequestDataBinder binder) throws Exception {
binder.registerCustomEditor(Date.class, new CustomDateEditor(
new SimpleDateFormat("yyyy-MM-dd"), true));
}
}add_emp.jsp<form action="add.do" method="post">
no : <input name="empNo" type="text" /><br/>
name:
<input name="name" type="text" /><br/>
phone:
<input name="phone" type="text" /><br/>
date:
<input name="hireDate" type="text" /><br/>
<input type="submit" value="add" />
</form> <bean id="mappings"
class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
<property name="mappings">
<props>
<prop key="add_emp.do">addEmpController</prop>
<prop key="add.do">addEmpSuccController</prop>
</props>
</property>
</bean> <bean id="addEmpController"
class="org.springframework.web.servlet.mvc.UrlFilenameViewController"> </bean> <bean id="addEmpSuccController" class="demo.controller.EmpController">
<property name="commandClass" value="demo.controller.Emp"></property>
</bean>
<bean
class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/jsp/" />
<property name="suffix" value=".jsp" />
</bean>
<input name="hireDate" type="text" /><br/>
这里 我输入 2010-01-01 之后 出错
@Override
protected void initBinder(HttpServletRequest request,
ServletRequestDataBinder binder) throws Exception {
binder.registerCustomEditor(Date.class, new CustomDateEditor(
new SimpleDateFormat("yyyy-MM-dd"), true));
}
语句是没有出错的
Date.class 这里导包, 确定一下是不是 java.util 的date 而不是 java.sql