javabean:Address

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package com.baebae.model;

public class Address
{
	private String city;
	private String district;
	private String street;
	private int no;

	getter/setter()...
}

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JAVA--JSON互相转换：

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【1】JAVA——>JSON

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/**
	 * <1> JAVA-->JSON
	 * 单个对象Object-->JSONObject
	 * 集合List/Array/Set----->JSONArray
	 */
	@Test
	public void testObj2JSON() throws InterruptedException {
		// 1.bean---->json
		Address addr = new Address();
		addr.setCity("北京");
		addr.setDistrict("清河");
		addr.setStreet("安宁庄东路");
		addr.setNo(200);
	
		JSONObject jsonObj = JSONObject.fromObject(addr);
		System.err.println("____________jsonObj_______________");
		System.out.println(jsonObj);
		// 1.集合-->JSONArray
		Set<Address> set = new HashSet<Address>();
		Address[] addrArray = new Address[100];
		List<Address> list = new ArrayList<Address>();
		for(int i=0;i<10;i++){
			Address address = new Address();
			address.setCity("北京");
			address.setDistrict("清河");
			address.setStreet("安宁庄东路"+i+"号");
			address.setNo(200+i);
			
			list.add(address);
			addrArray[i]=address;
			set.add(address);
		}
		// 这里不能用JSONObject.fromObject(collection)
		JSONArray jsonList = JSONArray.fromObject(list);
		JSONArray jsonArray = JSONArray.fromObject(addrArray);
		JSONArray jsonSet = JSONArray.fromObject(set);
		
		// 打印结果
		Thread.sleep(3000);
		System.err.println("____________jsonList_______________");
		System.out.println(jsonList);
		Thread.sleep(3000);
		System.err.println("_____________jsonArray______________");
		System.out.println(jsonArray);
		Thread.sleep(3000);
		System.err.println("______________jsonSet_____________");
		System.out.println(jsonSet);
		Thread.sleep(3000);
	}

打印结果：

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____________jsonObj_______________
{"city":"北京","district":"清河","no":200,"street":"安宁庄东路"}
____________jsonList_______________
[{"city":"北京","district":"清河","no":200,"street":"安宁庄东路0号"},{"city":"北京","district":"清河","no":201,"street":"安宁庄东路1号"},{"city":"北京","district":"清河","no":202,"street":"安宁庄东路2号"},{"city":"北京","district":"清河","no":203,"street":"安宁庄东路3号"},{"city":"北京","district":"清河","no":204,"street":"安宁庄东路4号"},{"city":"北京","district":"清河","no":205,"street":"安宁庄东路5号"},{"city":"北京","district":"清河","no":206,"street":"安宁庄东路6号"},{"city":"北京","district":"清河","no":207,"street":"安宁庄东路7号"},{"city":"北京","district":"清河","no":208,"street":"安宁庄东路8号"},{"city":"北京","district":"清河","no":209,"street":"安宁庄东路9号"}]
_____________jsonArray______________
[{"city":"北京","district":"清河","no":200,"street":"安宁庄东路0号"},{"city":"北京","district":"清河","no":201,"street":"安宁庄东路1号"},{"city":"北京","district":"清河","no":202,"street":"安宁庄东路2号"},{"city":"北京","district":"清河","no":203,"street":"安宁庄东路3号"},{"city":"北京","district":"清河","no":204,"street":"安宁庄东路4号"},{"city":"北京","district":"清河","no":205,"street":"安宁庄东路5号"},{"city":"北京","district":"清河","no":206,"street":"安宁庄东路6号"},{"city":"北京","district":"清河","no":207,"street":"安宁庄东路7号"},{"city":"北京","district":"清河","no":208,"street":"安宁庄东路8号"},{"city":"北京","district":"清河","no":209,"street":"安宁庄东路9号"},null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null]
______________jsonSet_____________
[{"city":"北京","district":"清河","no":207,"street":"安宁庄东路7号"},{"city":"北京","district":"清河","no":202,"street":"安宁庄东路2号"},{"city":"北京","district":"清河","no":200,"street":"安宁庄东路0号"},{"city":"北