1、PropertyEditor：内置可扩展，在类中进行局部使用 webdatabinder。（不推荐，一般使用全局方案会比较多）
2、Formatter：内置可扩展，全局，或者使用new Formatter的方式进行局部使用，只能转换String到其他类型。
3、Converter：内置不可扩展，全局或局部，和Formatter类似，但Converter的源对象不仅仅是String，而可以自行进行定义。
一、PropertyEditor
@RequestMapping(value = "date1.do") @ResponseBody public String date1(Date date1){ return date1.toString(); } @InitBinder("date1") public void initDate1(WebDataBinder binder){ binder.registerCustomEditor(Date.class,new CustomDateEditor(new SimpleDateFormat("yyyy-MM-dd"),true)); }
二、Formatter
package com.imooc.common; import org.springframework.format.Formatter; import java.text.ParseException; import java.text.SimpleDateFormat; import java.util.Date; import java.util.Locale; public class MyDateFormatter implements Formatter<Date> { public Date parse(String text, Locale locale) throws ParseException { SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd"); return sdf.parse(text); } public String print(Date object, Locale locale) { return null; } }
<?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" xmlns:aop="http://www.springframework.org/schema/aop" 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.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd"> <context:component-scan base-package="com" annotation-config="true"/> <mvc:annotation-driven conversion-service="myDateFormatter"/> <bean id ="myDateFormatter" class="org.springframework.format.support.FormattingConversionServiceFactoryBean"> <property name="formatters"> <set> <bean class="com.imooc.common.MyDateFormatter"></bean> </set> </property> </bean> </beans>
@RequestMapping(value = "date2.do") @ResponseBody public String date2(Date date2){ return date2.toString(); }
三、Converter
package com.imooc.common; import org.springframework.core.convert.converter.Converter; import java.text.ParseException; import java.text.SimpleDateFormat; import java.util.Date; public class MyDateConverter implements Converter<String,Date> { public Date convert(String source) { SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd"); try { return sdf.parse(source); } catch (ParseException e) { e.printStackTrace(); } return null; } }
<?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" xmlns:aop="http://www.springframework.org/schema/aop" 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.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd"> <context:component-scan base-package="com" annotation-config="true"/> <mvc:annotation-driven conversion-service="myDateConverter"/> <bean id ="myDateConverter" class="org.springframework.format.support.FormattingConversionServiceFactoryBean"> <property name="converters"> <set> <bean class="com.imooc.common.MyDateConverter"></bean> <bean class="org.springframework.core.convert.support.StringToBooleanConverter"></bean> </set> </property> </bean> </beans>
@RequestMapping(value = "date2.do") @ResponseBody public String date2(Date date2){ return date2.toString(); }
