SPRING MVC3.2案例讲解--SPRING MVC3的POJO赋值-优快云博客

本文介绍如何使用Spring MVC实现不同类型的数据转换与绑定到POJO对象上。包括基本数据类型、日期、集合、JavaBean等复杂类型的转换过程。通过具体代码示例展示了请求参数到对象属性的映射。

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package org.springframework.samples.mvc.convert;

import java.util.Collection;
import java.util.Date;

import org.springframework.format.annotation.DateTimeFormat;
import org.springframework.format.annotation.DateTimeFormat.ISO;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;

@Controller
@RequestMapping("/convert")
public class ConvertController {
//	 http://127.0.0.1:8010/convert/primitive?value=3
	@RequestMapping("primitive")
	public @ResponseBody String primitive(@RequestParam Integer value) {
		return "Converted primitive " + value;
	}

//	http://127.0.0.1:8010/convert/date/2010-07-04
	// requires Joda-Time on the classpath
	@RequestMapping("date/{value}")
	public @ResponseBody String date(@PathVariable @DateTimeFormat(iso=ISO.DATE) Date value) {
		return "Converted date " + value;
	}

//	http://127.0.0.1:8010/convert/collection?values=1&values=2&values=3&values=4&values=5
//	http://127.0.0.1:8010/convert/collection?values=1,2,3,4,5
	@RequestMapping("collection")
	public @ResponseBody String collection(@RequestParam Collection<Integer> values) {
		return "Converted collection " + values;
	}
	
//	http://127.0.0.1:8010/convert/formattedCollection?values=2010-07-04,2011-07-04
	@RequestMapping("formattedCollection")
	public @ResponseBody String formattedCollection(@RequestParam @DateTimeFormat(iso=ISO.DATE) Collection<Date> values) {
		return "Converted formatted collection " + values;
	}

//	http://127.0.0.1:8010/convert/bean?nested.foo=bar&nested.list[0].foo=baz&nested.map[key].list[0].foo=bip
	@RequestMapping("bean")
	public @ResponseBody String bean(JavaBean bean) {
		return "Converted " + bean;
	}
	
	//http://127.0.0.1:8010/convert/value?value=123456789
	@RequestMapping("value")
	public @ResponseBody String valueObject(@RequestParam SocialSecurityNumber value) {
		return "Converted value object " + value;
	}
	
	//http://127.0.0.1:8010/convert/custom?value=123-45-6789
	@RequestMapping("custom")
	public @ResponseBody String customConverter(@RequestParam @MaskFormat("###-##-####") String value) {
		return "Converted '" + value + "' with a custom converter";
	}

}

利用SPRINGMVC实现POJO的赋值及类型转化，将REQUEST中的参数进行类型转化后赋值给POJO的属性。转化类型（字符，数组，日期，数组，MAP，JAVABEAN）