JAVA SPRINGMVC Converters

One, sometimes springmvc to provide us with the data conversion can not convert all types such as the string type conversion date type, this time we need to customize the converter to help Springmvc transform the type we need.

Two, 1) define our converters:

1 Package Jd.com.contronller.jd.com.convert;2 3 import Org.springframework.core.convert.converter.Converter;4 5 import java.text.ParseException;6 import Java.text.SimpleDateFormat;7 import java.util.Date;8 9  Public classCustomstringtodate Implements Converter<string,date> {Ten @Override One      PublicDate Convert (String s) { A         Try { -Date date=NewSimpleDateFormat ("YYYY-MM-DD HH:mm:ss"). Parse (s); -             returndate; the}Catch(ParseException e) { - e.printstacktrace (); -         } -         return NULL; +     } -}

2) Add our converters in the SPRINGMVC configuration file:

1<!--custom converters Note the reference in the annotation driver2<bean id="Conversionservice"3     class="Org.springframework.format.support.FormattingConversionServiceFactoryBean">4<property name="Converters">5<Set>6<beanclass="jd.com.contronller.jd.com.convert.CustomStringToDate"/>7</Set>8</property>9</bean>

3) Need to note: Add our Converter ID in the note driver

1 <mvc:annotation-driven conversion-service="conversionservice"  />

Because the converter is processor adapter processing, if we do not use annotations, the traditional reference is as follows:

<?xmlversion="1.0"encoding="UTF-8"? ><beansxmlns="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:dubbo="Http://code.alibabatech.com/schema/dubbo"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.xsdhttp//Www.springframework.org/schema/mvchttp://www.springframework.org/schema/mvc/spring-mvc-4.0.xsdhttp//Code.alibabatech.com/schema/dubbohttp://code.alibabatech.com/schema/dubbo/dubbo.xsdhttp//Www.springframework.org/schema/contexthttp://www.springframework.org/schema/context/spring-context-4.0.xsd"><!--scan a class with controller annotations--<context:component-scanbase-package="Cn.itcast.springmvc.controller"/> <!--converter configuration-<beanid="Conversionservice"        class="Org.springframework.format.support.FormattingConversionServiceFactoryBean"> <propertyname="Converters"> <Set> <beanclass="jd.com.contronller.jd.com.convert.CustomStringToDate"/> </Set> </property> </bean> <!--custom Webbinder-<beanid="Custombinder"    class="Org.springframework.web.bind.support.ConfigurableWebBindingInitializer"> <propertyname="Conversionservice"ref="Conversionservice"/> </bean> <!--Note Adapter--<beanclass="Org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter"><propertyname= "Webbindinginitializer" ref= "Custombinder" ></property></bean> <!--Note Processor Mapper-<beanclass="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping"/>

Note the following:

Front-end page to display the date format you need to define the following tags:

1  <td><fmt:formatdate value="${n.create_time} " pattern="  YYYY-MM-DD HH:mm:ss" /> </td>

Need to pay attention to the format needs and the subsequent converter class format consistent, otherwise error!!!!

JAVA SPRINGMVC Converters