java spring mvc表单值未在POST上打印_Java_Spring_Spring Mvc

java spring mvc表单值未在POST上打印

java spring spring-mvc

java spring mvc表单值未在POST上打印,java,spring,spring-mvc,Java,Spring,Spring Mvc,我是spring mvc的新手我使用SpringTemplateProject创建了一个项目，并在其中使用了hibernate 我创建了一个表单，并在post上将这些值插入到数据库中，但问题是我无法在post上显示这些值这是代码 //控制器 package com.projects.data; import java.util.Locale; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.sprin

我是spring mvc的新手我使用SpringTemplateProject创建了一个项目，并在其中使用了hibernate

我创建了一个表单，并在post上将这些值插入到数据库中，但问题是我无法在post上显示这些值

这是代码

//控制器

package com.projects.data;

import java.util.Locale;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.ui.ModelMap;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

import com.projects.data.*;

@Controller
public class HomeController {

private static final Logger logger = LoggerFactory.getLogger(HomeController.class);

@Autowired
ServiceImpl service;


@RequestMapping(value = "/", method = RequestMethod.GET)        
public String customer(Locale locale, Model model) {
    logger.info("Welcome home! The client locale is {}.", locale);
    return "home";
}

@RequestMapping(value = "/customer", method = RequestMethod.POST)
   public String addCustomer(@ModelAttribute("customer") Customer customer,Model model)
{
    service.addCustomer(customer);
            return "customer/customer";
}
}

Home.jsp

<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<%@ taglib prefix="form" uri="http://www.springframework.org/tags/form"%>
<%@ page session="false" %>
<html>
<head>
<title>Home</title>
</head>
<body>
<spring:url var="customer" value="/customer"/>
<form:form action="${customer}" method="post" modelAttribute="customer" commandName="custform">
<form:label path="custid">Id:</form:label>
<form:input path="custid"/> <br>

<form:label path="name">Name:</form:label>
<form:input path="name"/> <br>

<form:label path="age">Age:</form:label>
<form:input path="age"/> <br>

<input type="submit" value="Save"/>    
</form:form>
</html>

但这似乎也不起作用

模范班

package com.projects.data;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.Table;

@Entity
@Table(name="customer")
public class Customer {
    @Id
    @Column(name="CUST_ID")
    int custId;

    @Column(name="NAME")
    String name;

    @Column(name="AGE")
    int age;

    public Customer(int custId,String name,int age)
    {
        this.custId=custId;
        this.name=name;
        this.age=age;
    }

    //getter and setter methods

    public Customer() {
        // TODO Auto-generated constructor stub
    }

    public int getCustId() {
        return custId;
    }
    public void setCustId(int custId) {
        this.custId = custId;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public int getAge() {
        return age;
    }
    public void setAge(int age) {
        this.age = age;
    }

}

从jsp中的

${custform.age}

、

${custform.name}

和

${custform.custid}

中删除

custform.

，并保持model.addAttribute在控制器中的状态。您应该能够使用jsp中的

${age}

从客户处访问

age

控制器：

@RequestMapping(value = "/customer", method = RequestMethod.POST)
   public String addCustomer(@ModelAttribute("customer") Customer customer,Model model)
{
    service.addCustomer(customer);
    model.addAttribute("custid",customer.getCustId());
    model.addAttribute("name", customer.getName());
    model.addAttribute("age", customer.getAge());
    return "customer/customer";
}

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<!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>Submitted Information</title>
</head>
 <body>

<h2>Submitted Information</h2>
<table>
 <tr>
    <td>Customer id</td>
    <td>${custid}</td>
 </tr>
 <tr>
    <td>Name</td>
    <td>${name}</td>
 </tr>
 <tr>
    <td>Age</td>
    <td>${age}</td>
 </tr>
 </table> 
 </body>
 </html>

JSP:

@RequestMapping(value = "/customer", method = RequestMethod.POST)
   public String addCustomer(@ModelAttribute("customer") Customer customer,Model model)
{
    service.addCustomer(customer);
    model.addAttribute("custid",customer.getCustId());
    model.addAttribute("name", customer.getName());
    model.addAttribute("age", customer.getAge());
    return "customer/customer";
}

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<!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>Submitted Information</title>
</head>
 <body>

<h2>Submitted Information</h2>
<table>
 <tr>
    <td>Customer id</td>
    <td>${custid}</td>
 </tr>
 <tr>
    <td>Name</td>
    <td>${name}</td>
 </tr>
 <tr>
    <td>Age</td>
    <td>${age}</td>
 </tr>
 </table> 
 </body>
 </html>

JSP 保持与问题相同。

试试看

@RequestMapping(value = "/customer", method = RequestMethod.POST)
public ModelAndView addCustomer(@ModelAttribute("customer") Customer customer)
{
    service.addCustomer(customer);

    Model model = new ModelMap();
    model.addAttribute("custid",customer.getCustId());
    model.addAttribute("name", customer.getName());
    model.addAttribute("age", customer.getAge());


    return new ModelAndView("customer/customer", model);
}

顺便说一句：一个更好的方法是在发布后重定向（http代码303）到客户展示页面。然后用户可以重新加载页面（F5）每次刷新时不创建新客户。

数据库中插入的用户是否具有正确的值？@嘿，谢谢，它工作了，但我无法看到我的custid dat值没有显示。将

Id:

更改为

Id:

如果使用我提到的第二种方法，请使用

${custform.custid}

访问

custId

。java中的所有内容都区分大小写；）嘿，我把所有的custid都改成了custid，但在我调试之后，我仍然看到它的名字是'custid'，它仍然是零..我如何更新它？你使用的是哪种方法？我想你需要清除缓存。如果您使用的是Eclipse，请清理并构建该项目，它应该可以工作。嘿，我现在清理并构建了所有值，从custid更新到custid。但是它仍然接受值0。嘿，谢谢它工作了，但是现在我没有得到custid值。我得到的custid为0

@RequestMapping(value = "/customer", method = RequestMethod.POST)
public ModelAndView addCustomer(@ModelAttribute("customer") Customer customer)
{
    service.addCustomer(customer);

    Model model = new ModelMap();
    model.addAttribute("custid",customer.getCustId());
    model.addAttribute("name", customer.getName());
    model.addAttribute("age", customer.getAge());


    return new ModelAndView("customer/customer", model);
}