使用gson解析，生成Json

包：gson-2.3.jar
Json文本解析为Java对象；Java对象生成为Json文本

import com.google.gson.Gson;

public class TestGson {
	class Person {
		private String name;
		private int[] power;
		private Horse hs1;
		private Horse[] hs2;

		public Horse getHs1() {
			return hs1;
		}

		public void setHs1(Horse hs1) {
			this.hs1 = hs1;
		}

		public Horse[] getHs2() {
			return hs2;
		}

		public void setHs2(Horse[] hs2) {
			this.hs2 = hs2;
		}

		public int[] getPower() {
			return power;
		}

		public void setPower(int[] power) {
			this.power = power;
		}

		public String getName() {
			return name;
		}

		public void setName(String name) {
			this.name = name;
		}
	}

	class Horse {
		private String type;

		public String getType() {
			return type;
		}

		public void setType(String type) {
			this.type = type;
		}
	}

	public static void main(String[] args) {
		String strJson = "{'name':'吕奉先','power':[100,30],'hs1':{'type':'赤兔'},'hs2':[{'type':'乌骓'},{'type':'黄标'}]}";
		Gson g = new Gson();
		// Json->对象
		Person p = g.fromJson(strJson, Person.class);
		System.out.println(p.name + ":" + p.power[1]);
		//对象->Json
		p.setName("关羽");
		String json = g.toJson(p);
		System.out.println(json);
	}
}