ssm整合快速入门程序(三)之Data类型转换器

时间：2022-06-25 16:57:11

今天就写写springmvc配置Data类型转换器

首先在创建一个转换器的包cn.my.ssm.controller.converter，创建一个CustomDateConverter类实现Converter<String, Date>接口的public Date convert(String source)方法

package cn.my.ssm.controller.converter;

import java.text.ParseException;

import java.text.SimpleDateFormat;

import java.util.Date;

import org.springframework.core.convert.converter.Converter;

/**

 * date类型转换

 * @author Administrator

 *

 */

public class CustomDateConverter implements Converter<String, Date>  {

    @Override

    public Date convert(String source) {

        SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");

        try {

            return simpleDateFormat.parse(source);

        } catch (ParseException e) {

            e.printStackTrace();

        }

        return null;

    }

}

然后再到springmvc.xml里面添加转换器映射代码

<?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: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-4.0.xsd

        http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd

        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd">

       <!--  扫描组件 -->

        <context:component-scan base-package="cn.my.ssm.controller"></context:component-scan>

       <!--  配置静态资源解析器 -->

       <mvc:resources location="/js/" mapping="/js/**"/>

        <!-- 配置映射器和适配器 -->

        <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>

            <property name="suffix" value=".jsp"></property>

        </bean>

      <!--   配置转换器（比如Date类型） -->

        <bean id="conversionService" class="org.springframework.format.support.FormattingConversionServiceFactoryBean">

            <property name="converters">

                <list>

                    <bean class="cn.my.ssm.controller.converter.CustomDateConverter"></bean>

                </list>

            </property>

        </bean>

</beans>

然后修改itemsList.jsp的表格代码，代码如下

<%@ page language="java" contentType="text/html; charset=UTF-8"

    pageEncoding="UTF-8"%>

<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>

<%@ taglib uri="http://java.sun.com/jsp/jstl/fmt"  prefix="fmt"%>

<!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=UTF-8">

<title>查询商品列表</title>

<script type="text/javascript">

    function deleteItems(){

        document.formSubmit.action = "${pageContext.request.contextPath }/items/deleteItems.action";

        document.formSubmit.submit();

    }

    function queryItems(){

        document.formSubmit.action = "${pageContext.request.contextPath}/items/queryItems.action";

        document.formSubmit.submit();

    }

    function batchEditItems(){

        document.formSubmit.action = "${pageContext.request.contextPath}/items/batchEditItems.action";

        document.formSubmit.submit();

    }

</script>

</head>

<body>

用户:${name }

<a href="${pageContext.request.contextPath}/logout.action">退出</a>

<form name="formSubmit" action="${pageContext.request.contextPath }/items/queryItems.action" method="post">

查询条件：

<table width="100%" border=1>

<tr>

<td><input name="itemsCustom.name" type="text" value=""/></td>

<td>

<input type="button" value="查询" onclick="queryItems()"/>

<input type="button" value="批量删除" onclick="deleteItems()"/>

<input type="button" value="批量修改" onclick="batchEditItems()"/>

</td>

</tr>

</table>

商品列表：

<table width="100%" border=1>

<tr>

    <td>选择</td>

    <td>商品名称</td>

    <td>商品价格</td>

    <td>生产日期</td>

    <td>商品描述</td>

    <td>操作</td>

</tr>

<c:forEach items="${itemsList }" var="item">

<tr>

    <td><input type="checkbox" name="items_id" value="${item.id}"/></td>

    <td>${item.name }</td>

    <td>${item.price }</td>

   <!--使用jstl标签返回时间格式-->

    <td><fmt:formatDate value="${item.createtime}" pattern="yyyy-MM-dd HH:mm:ss"/></td>

    <td>${item.detail }</td>

    <td><a href="${pageContext.request.contextPath }/items/editItems.action?id=${item.id}">修改</a></td>

</tr>

</c:forEach>

</table>

</form>

</body>

</html>

这样就完成date类型转换了

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