自定义数据转换器

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实现步骤：

1.自定义转换器，实现Convert接口

package jv.springmvc.requestmapping;

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

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

public class UserConverter implements Converter<String, User>{

	@Override
	public User convert(String source) {
		//User(String username, String email, int age, Address address, Date birth)
		
		String[] src = source.split(",");
		if(src!=null&&src.length==5) {
			try {
				String name = src[0];
				String email = src[1];
				int age = Integer.parseInt(src[2]);
				Address address = new Address();
				address.setProvince(src[3]);
				SimpleDateFormat sf = new SimpleDateFormat("yyyy-MM-dd");
				Date birth = sf.parse(src[4]);
				return new User(name,email,age,address,birth);
			} catch (ParseException e) {
				e.printStackTrace();
			}
		}
		
		return null;
	}

}

2.配置SpringMVC配置文件

	<!-- 在实际开发中通常都需配置 mvc:annotation-driven 标签 -->
	<mvc:annotation-driven conversion-service="conversionService"></mvc:annotation-driven>
	
	<bean id="conversionService" class="org.springframework.format.support.FormattingConversionServiceFactoryBean">
		<property name="converters">
			<set>
				<ref bean="userConverter"/>
			</set>
		</property>
	</bean>
	
	<bean id="userConverter" class="jv.springmvc.requestmapping.UserConverter"></bean>

3.目标方法使用@RequestParam注解

	@RequestMapping("/testConversionService")
	public String testConversionService(@RequestParam("user") User user) {
		System.out.println("testConversionService"+user);
		return SUCCESS;
	}

4.编写HTML代码

	<form action="rm/testConversionService" method="POST">
		<input type="text" name="user" />
		<input type="submit" value="submit" />
	</form>

5.打印结果

说明已经成功将字符串借助SpringMVC的配置转成User对象

6.查看自定义转换器是否在converts中

这样做之后，就可以不适用表单，直接传入一个字符串就出来了一个对象。以后整合jquery的时候应该非常有用

转载于:https://my.oschina.net/u/3049601/blog/1516617