我創建了一個Spring MVC項目,但窗體的錯誤不顯示。爲什麼?
我試圖創建一個簡單的form.This是我Project.The項目的作品,但在JSP中的錯誤都沒有dispayed..Where我纔出問題的代碼?謝謝春天錯誤表單不顯示
Student.java
package coreservlets;
import javax.validation.constraints.NotNull;
import javax.validation.constraints.Size;
public class Student {
@Size(min=4,max=5,message="Size wrong")
@NotNull
private String name;
@Size(min=4,max=5,message="Size wrong")
@NotNull
private Integer age;
@Size(min=4,max=5,message="Size wrong")
@NotNull
private Integer id;
public String getName(){return name;}//getName
public void setName(String name){this.name=name;}//setName
public Integer getAge(){return age;}//getAge
public void setAge(Integer age){this.age=age;}//setAge
public Integer getId(){return id;}//getId
public void setId(Integer id){this.id=id;}//setId
}//Student
StudentController.java
package coreservlets;
import javax.validation.Valid;
import org.springframework.stereotype.Controller;
import org.springframework.ui.ModelMap;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.servlet.ModelAndView;
@Controller
public class StudentController {
@RequestMapping(value="/",method=RequestMethod.GET)
public ModelAndView student(){
return new ModelAndView("student", "command", new Student());
}//student
@RequestMapping(value="/addStudent", method=RequestMethod.POST)
public String addStudent(@ModelAttribute @Valid Student student,ModelMap model){
model.addAttribute("name",student.getName());
model.addAttribute("age",student.getAge());
model.addAttribute("id",student.getId());
return "result";
}//addStudent
}//StudentController
student.jsp
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<%@taglib uri="http://www.springframework.org/tags/form" prefix="form"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4 /loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Spring MVC Form Handling</title>
</head>
<body>
<h2>Student Information</h2>
<form:form method="post" action="/SpringMVCFormExample/addStudent" >
<table>
<tr>
<td><form:label path="name">Name</form:label></td>
<td><form:input path="name"/></td>
<form:errors path="name" />
</tr>
<tr>
<td><form:label path="age">Age</form:label></td>
<td><form:input path="age"/></td>
<form:errors path="age" />
</tr>
<tr>
<td><form:label path="id">Id</form:label></td>
<td><form:input path="id"/></td>
<form:errors path="id" />
</tr>
<tr>
<td colspan="2">
<input type="submit" value="Submit"/>
</td>
</tr>
</table>
</form:form>
result.jsp中
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<%@taglib uri="http://www.springframework.org/tags/form" prefix="form"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Spring MVC Form Handling</title>
</head>
<body>
<h2>Submitted Student Information</h2>
<table>
<tr>
<td>Name</td>
<td>${name}</td>
</tr>
<tr>
<td>Age</td>
<td>${age}</td>
</tr>
<tr>
<td>Id</td>
<td>${id}</td>
</tr>
</table>
</body>
</html>
的web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">
<display-name>Spring MVC Form</display-name>
<servlet>
<servlet-name>SpringMVCForm</servlet-name>
<servlet-class>
org.springframework.web.servlet.DispatcherServlet
</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>SpringMVCForm</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>
SpringMVCForm-servlet.xml中
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.1.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.1.xsd">
<context:component-scan base-package="coreservlets" />
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/jsp/" />
<property name="suffix" value=".jsp" />
而且又何必呢? YOu總是顯示'result'頁面。在'@ ModelAttribute'註釋參數後面添加一個'BindingResult'類型的參數後,檢查是否有錯誤,如果是這樣的話,再次顯示同一頁面,如果不行的話。 – 2014-09-24 10:09:28
我想要[link] http://postimg.org/image/grajjtiej/ 錯誤以紅色顯示 – Alex 2014-09-24 10:14:54