操作步骤:
1. 实现 org.springframework.core.convert.converter.Converter 接口
2. 配置 org.springframework.context.support.ConversionServiceFactoryBean converters
以String转Date为例:
定义转换器:
import java.text.ParseException;
import java.util.Date;
import org.apache.commons.lang.time.DateUtils;
import org.springframework.core.convert.converter.Converter;
public class String2DateConverter implements Converter<String, Date> {
private String format = "yyyy-MM-dd";
public void setFormat(String format){
this.format = format;
}
@Override
public Date convert(String arg0) {
try {
return DateUtils.parseDate(arg0, new String[] { format });
} catch (ParseException e) {
return null;
}
}
}
配置Spring:
xml配置
<bean id="conversionService" class="org.springframework.context.support.ConversionServiceFactoryBean">
<property name="converters">
<list>
<bean class="com.xxx.String2DateConverter"/>
</list>
</property>
</bean>
注解配置:
@Bean
ConversionServiceFactoryBean conversionServiceFactoryBean(){
ConversionServiceFactoryBean factoryBean = new ConversionServiceFactoryBean();
factoryBean.setConverters(new HashSet(){{add(new String2DateConverter());}});
return factoryBean;
}