json格式字符串与java.util.Map的互转(借助于jackson.jar)

package com.test.javaAPI.json;

/**

 * json工具类

 *

 * @author Wei

 * @time 2016年10月2日 下午4:25:25

 */

public class UtilJackson {

	public static String jsonStr = "{\"parameters\":{\"PI_CAE574\":\"20160908\",\"PI_JSRQ\":\"20160908\",\"Pi_CAE920\":\"301\",\"Pi_YAE601\":\"1\",\"PI_BAE001\":\"511502\",\"Pi_JFDX\":\"1\",\"\":\"pkg_weiyl.getMatchResult\"},\"serviceId\":\"directJdbcService\",\"method\":\"savePointProcedure\"}";

	/**

	 * 比较复杂的json格式字符串

	 */

	public static String jsonStr_HN = "{\"DataPackage\":{\"JZZL\":[{\"CY\\\"BZ\":\"2\",\"CYQK\":\"\",\"CYRQ\":\"20090205\",\"CYZD\":\"霍乱\",\"CYZD1\":\"\",\"CYZDGJDM\":\"A00.901\",\"JZJLH\":\"136\",\"JZLB\":\"21\",\"RYRQ\":\"20090205\",\"RYZD\":\"霍乱\",\"RYZD1\":\"\",\"RYZDGJDM\":\"A00.901\",\"RYZS\":\"\",\"SSMC\":\"\",\"YYBH\":\"1000\",\"ZYH\":\"\",\"ZYJSLB\":\"1\"},{\"CYBZ\":\"2\",\"CYQK\":\"\",\"CYRQ\":\"20090202\",\"CYZD\":\"霍乱\",\"CYZD1\":\"\",\"CYZDGJDM\":\"A00.901\",\"JZJLH\":\"142\",\"JZLB\":\"21\",\"RYRQ\":\"20090201\",\"RYZD\":\"霍乱\",\"RYZD1\":\"\",\"RYZDGJDM\":\"A00.901\",\"RYZS\":\"\",\"SSMC\":\"\",\"YYBH\":\"1000\",\"ZYH\":\"\",\"ZYJSLB\":\"1\"},{\"CYBZ\":\"2\",\"CYQK\":\"\",\"CYRQ\":\"20090304\",\"CYZD\":\"霍乱\",\"CYZD1\":\"\",\"CYZDGJDM\":\"A00.901\",\"JZJLH\":\"132\",\"JZLB\":\"21\",\"RYRQ\":\"20090303\",\"RYZD\":\"霍乱\",\"RYZD1\":\"\",\"RYZDGJDM\":\"A00.901\",\"RYZS\":\"\",\"SSMC\":\"\",\"YYBH\":\"1000\",\"ZYH\":\"\",\"ZYJSLB\":\"1\"},{\"CYBZ\":\"2\",\"CYQK\":\"\",\"CYRQ\":\"20090306\",\"CYZD\":\"nihao\",\"CYZD1\":\"\",\"CYZDGJDM\":\"\",\"JZJLH\":\"140\",\"JZLB\":\"21\",\"RYRQ\":\"20090305\",\"RYZD\":\"nihao\",\"RYZD1\":\"\",\"RYZDGJDM\":\"\",\"RYZS\":\"\",\"SSMC\":\"\",\"YYBH\":\"1000\",\"ZYH\":\"\",\"ZYJSLB\":\"1\"}]},\"FunctionParams\":{\"FHZ\":\"1\",\"GET_PAGE_TOTAL\":\"4\",\"HAS_NEXT_REQUEST\":\"false\",\"MSG\":\"执行成功！\",\"SESSIONID\":\"QKSZPNrRPptTGs3ymqvJhQLZyxKJpd4XCHGJQBGFQcFQtwRYGvxS!306292812!1338878737991\"}}";

	public static String jsonStr_KEY_DataPackage = "DataPackage";

	public static String jsonStr_KEY_FunctionParams = "FunctionParams";

	public static String jsonStr4 = "{\"verified\":false,\"name\":{\"last\":\"Hankcs\",\"first\":\"Joe\"},\"userImage\":\"Rm9vYmFyIQ==\",\"gender\":\"MALE\"}";

	public static String jsonStr4_KEY1 = "verified";

}

　　

package com.test.javaAPI.json;

import java.io.IOException;

import java.util.Map;

import org.codehaus.jackson.JsonParseException;

import org.codehaus.jackson.map.JsonMappingException;

import org.codehaus.jackson.map.ObjectMapper;

import org.junit.Test;

import com.sun.xml.internal.messaging.saaj.util.ByteOutputStream;

public class JacksonTest {

	public static void main(String[] args) throws JsonParseException, JsonMappingException, IOException {

		// ObjectMapper objMap = new ObjectMapper();

		// // Map map = objMap.readValue(UtilJackson.jsonStr, Map.class);

		// Map map = objMap.readValue(UtilJackson.jsonStr_HN, Map.class);

		// System.out.println(map.toString());

		// Set set = map.keySet();

		// Iterator it = set.iterator();

		// while (it.hasNext()) {

		// Object key = (Object) it.next();

		// Object value = map.get(key);

		// System.out.println("key:" + key + ",value:" + value);

		// }

		// new JacksonTest().removeDataPackage("DataPackage");

		String str = new JacksonTest().removeJsonObjByKey(UtilJackson.jsonStr4,

				UtilJackson.jsonStr4_KEY1);

		System.out.println(str);

	}

	/**

	 * 方法的作用：去除一个json格式字符串的某一个key 删除 这个json字符串里的这个key对应的对象 该方法与框架中的 String

	 * cn.sinobest.framework.web.his.JsonManager.removeDataPackage(String

	 * jsonStr) 这个方法的功能一致

	 *

	 * @param jsonKey

	 * @return

	 * @throws JsonParseException

	 * @throws JsonMappingException

	 * @throws IOException

	 */

	@Test

	public String removeDataPackage(String jsonKey) throws JsonParseException, JsonMappingException, IOException {

		ObjectMapper objMap = new ObjectMapper();

		Map map = objMap.readValue(UtilJackson.jsonStr_HN, Map.class);

		// map.remove("DataPackage");

		map.remove(jsonKey);

		ByteOutputStream bops = new ByteOutputStream();

		objMap.writeValue(bops, map);

		System.out.println(bops.toString());

		return null;

	}

	/**

	 *

	 * @param jsonStr

	 * @param key

	 * @return

	 * @throws IOException

	 * @throws JsonMappingException

	 * @throws JsonParseException

	 */

	public String removeJsonObjByKey(String jsonStr, String key)

			throws JsonParseException, JsonMappingException, IOException {

		ObjectMapper objMap = new ObjectMapper();

		// 1 把json格式字符串转换为 java.util.Map

		Map map = objMap.readValue(jsonStr, Map.class);

		// 2 删除map中的对应key的项目

		map.remove(key);

		// 准备字节流，接收ObjectMapper中写出的输出流

		ByteOutputStream bops = new ByteOutputStream();

		// 3 把map重新转换为json格式字符串

		objMap.writeValue(bops, map);

		if (!"".equals(bops)) {

			return bops.toString();

		}

		return "";

	}

}

　　

控制台输出：

{"name":{"last":"Hankcs","first":"Joe"},"userImage":"Rm9vYmFyIQ==","gender":"MALE"}

用 http://tool.oschina.net/codeformat/json 这个json字符串格式化工具格式化后的效果：

{

    "name": {

        "last": "Hankcs",

        "first": "Joe"

    },

    "userImage": "Rm9vYmFyIQ==",

    "gender": "MALE"

}

json格式字符串与java.util.Map的互转(借助于jackson.jar)的相关教程结束。