Springmvc类型转换器和Date时间的格式化转换器

相关的包结构：

SpringMvc的配置文件的配置：

<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:p="http://www.springframework.org/schema/p"
       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-4.1.xsd
                       http://www.springframework.org/schema/mvc
                       http://www.springframework.org/schema/mvc/spring-mvc-4.1.xsd
                       http://www.springframework.org/schema/context
                       http://www.springframework.org/schema/context/spring-context-4.1.xsd">


    
    <context:component-scan base-package="com.zjj" />


    
    <mvc:annotation-driven conversion-service="conversionService">
    mvc:annotation-driven>

    
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/jsp/" />
        <property name="suffix" value=".jsp" />
    bean>

    
    <bean id="conversionService" class="org.springframework.context.support.ConversionServiceFactoryBean">
        <property name="converters">
            <list>
<bean class="com.zjj.converter.GoodConverter"/>
            list>
        property>


        <property name="formatters">
            <list>
                <bean class="com.zjj.converter.DateFormatter">
                    <property name="dateFormat" value="yyyy-MM-dd"/>
                bean>
            list>

        property>
    bean>
beans>

需要在原有的基础上加上

  <mvc:annotation-driven conversion-service="conversionService">
    mvc:annotation-driven>
     
    <bean id="conversionService" class="org.springframework.context.support.ConversionServiceFactoryBean">
        <property name="converters">
            <list>
<bean class="com.zjj.converter.GoodConverter"/>
            list>
        property>
    bean>
beans>

UserController:

package com.zjj.controller;


import com.zjj.pojo.Goods;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;

@Controller
public class GoodController {
      
    
    @RequestMapping("/addGoods")
 public String showGoods(@RequestParam("goods") Goods goods, Model model){
     

     System.out.println(goods);

     model.addAttribute("goods", goods);

     return "goodList";


 }

}

GoodConverter:

package com.zjj.converter;

import com.zjj.pojo.Goods;
import org.springframework.core.convert.converter.Converter;

public class GoodConverter implements Converter<String, Goods> {
     
    @Override
    public Goods convert(String s) {
     
        if(s!=null &&s.length()>0){
     

/*
            private Double price;
            private Integer nums;*/

            String[] arr = s.split(",");
            Goods goods=new Goods(arr[0],Double.valueOf(arr[1]),Integer.valueOf(arr[2]));
            return  goods;


        }

        return null;
    }
}

Goods类:

package com.zjj.pojo;


import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;

@Data
@AllArgsConstructor
@NoArgsConstructor
public class Goods {
     
    private String goodName;
    private Double price;
    private Integer nums;

}

Date时间格式的转换器的配置：Springmvc.xml转换器中加上

  
        <property name="formatters">
            <list>
                <bean class="com.zjj.converter.DateFormatter">
                    <property name="dateFormat" value="yyyy-MM-dd"/>
                bean>
            list>

        property>

创建Student类：一定要有Date数据类型

package com.zjj.pojo;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;

import java.util.Date;

@Data
@AllArgsConstructor
@NoArgsConstructor
public class Student {
     
    private Integer stuNo;
    private String  stuName;
    private Date birthday;

}

创建showStu.jsp:

<%@ page contentType="text/html;charset=UTF-8" language="java" isELIgnored="false" %>
<%@ taglib prefix="fmt" uri="http://java.sun.com/jsp/jstl/fmt" %>
<html>
<head>
    <title>Titletitle>
head>
<body>

学号： ${stu.stuNo}
学生姓名： ${stu.stuName}
生日：<fmt:formatDate value="${stu.birthday}" pattern="yyyy年MM月dd日"/>

body>
html>

创建addStu.jsp:

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Titletitle>
head>
<body>
<form action="addStu" method="post">

    <table>
        <tr>
            <td>学号：td>
            <td><input type="text" name="stuNo">td>
        tr>
        <tr>
            <td>姓名：td>
            <td><input type="text" name="stuName">td>
        tr>
        <tr>
            <td>生日td>
            <td><input type="date" name="birthday">td>
        tr>
        <tr>
            <td>td>
            <td><input type="submit" name="添加学生">td>
        tr>
    table>
form>

body>
html>

创建StudentController类：

package com.zjj.controller;

import com.zjj.pojo.Student;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;

@Controller
public class StudentController {
     

    @RequestMapping("/addStu")
    public String addStudent(Student student, Model model){
     
        System.out.println(student);
        model.addAttribute("stu",student);
        return "showStu";
    }
}

创建DateFormatter类进行相关的转换：

package com.zjj.converter;

import org.springframework.format.Formatter;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Locale;

public class DateFormatter implements Formatter<Date> {
     

    //日期格式化对象
    private SimpleDateFormat dateFormat;

    public SimpleDateFormat getDateFormat() {
     
        return dateFormat;
    }

    public void setDateFormat(SimpleDateFormat dateFormat) {
     
        this.dateFormat = dateFormat;
    }

    //解析
    @Override
    public Date parse(String s, Locale locale) throws ParseException {
     
        return dateFormat.parse(s);
    }
    //显示
    @Override
    public String print(Date date, Locale locale) {
     
        return dateFormat.format(date);
    }
}