欢迎您访问程序员文章站本站旨在为大家提供分享程序员计算机编程知识!
您现在的位置是: 首页

Java用JSONObject-lib来解析json串

程序员文章站 2024-01-30 16:44:22
...
直接贴代码:(所需jar包:json-lib.jar,可能会关联一些其它的jar包,请自行搜索.)

import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;

import net.sf.json.JSONArray;
import net.sf.json.JSONObject;

public class JsonParser {

	@SuppressWarnings("rawtypes")
	public void test() {		
		Map m = this.testJson("jsonString");
		System.out.println(((Map) ((List) m.get("test")).get(0)).get("test_title"));
	}

	@SuppressWarnings({ "rawtypes", "unchecked" })
	public Map testJson(String str) {
		JSONObject json = JSONObject.fromObject(str);
		Iterator<?> it = json.keySet().iterator();
		Map map = new HashMap();
		while (it.hasNext()) {
			String key = (String) it.next();
			String value = json.getString(key);
			if (this.isString(value)) {
				map.put(key, value);
			}
			if (this.isJson(value)) {
				map.put(key, this.testJson(value));
			}
			if (this.isJsonArray(value)) {
				map.put(key, this.testJsonArray(value));
			}

		}
		return map;
	}

	@SuppressWarnings({ "unchecked", "rawtypes" })
	public List testJsonArray(String str) {
		JSONArray jsonArr = JSONArray.fromObject(str);
		List list = new ArrayList();
		for (Object json : jsonArr) {
			String jsonStr = json.toString();
                if(this.isString(jsonStr)){
                    list.add(jsonStr);
                }
                if(this.isJson(jsonStr)){
                    list.add(this.testJson(jsonStr.toString()));
                }
                if(this.isJsonArray(jsonStr)){
                    list.add(this.testJsonArray(jsonStr.toString()));
                }    
		}
		return list;
	}

	public boolean isJson(String s) {
		boolean flag = true;
		try {
			JSONObject.fromObject(s);
		} catch (Exception e) {
			flag = false;
		}
		return flag;
	}

	public boolean isJsonArray(String s) {
		boolean flag = true;
		try {
			JSONArray.fromObject(s);
		} catch (Exception e) {
			flag = false;
		}
		return flag;
	}

	public boolean isString(String s) {
		return !this.isJson(s) && !this.isJsonArray(s);
	}

	public static void main(String[] args) {
		JsonParser tj = new JsonParser();
		tj.test();

	}

}