json格式的一些常用操作方法

 ?1 package com.liveyc.restfull.until; ?2 ??3 import java.util.HashMap; ?4 import java.util.Iterator; ?5 import java.util.List; ?6 ??7 import org.apache.commons.logging.Log; ?8 import org.apache.commons.logging.LogFactory; ?9 import org.codehaus.jackson.map.ObjectMapper; 10 import org.codehaus.jackson.type.JavaType; 11 ?12 import net.sf.json.JSONArray; 13 import net.sf.json.JSONObject; 14 ?15 public class JsonTools { 16 ?????17 ????public static Log log = LogFactory.getLog(JsonTools.class); 18 ?????19 ????private static ObjectMapper objectMapper = new ObjectMapper(); 20 ????/** 21 ?????* ?22 ?????* @author JSON工具类 23 ?????* @param ?24 ?????* ?25 ?????*/ 26 ?????27 ?28 ????/*** 29 ?????* 将对象序列化为JSON文本 30 ?????* @param object 31 ?????* @return 32 ?????*/ 33 ????public static String toJSONString(Object object) 34 ????{ 35 ????????JSONArray jsonArray = JSONArray.fromObject(object); 36 ?37 ????????return jsonArray.toString(); 38 ????} 39 ?????40 ????/*** 41 ?????* 将JSON对象序列化为JSON文本 42 ?????* @param jsonObject 43 ?????* @return 44 ?????*/ 45 ????public static String toObjString(Object object) 46 ????{ 47 ????????JSONObject jsonObject = JSONObject.fromObject(object); 48 ????????return jsonObject.toString(); 49 ????} ?50 ?????51 ????/*** 52 ?????* 将对象转换为JSON对象数组 53 ?????* @param object 54 ?????* @return 55 ?????*/ 56 ????public static JSONArray toJSONArray(Object object) 57 ????{ 58 ????????return JSONArray.fromObject(object); 59 ????} 60 ?61 ????/*** 62 ?????* 将对象转换为JSON对象 63 ?????* @param object 64 ?????* @return 65 ?????*/ 66 ????public static JSONObject toJSONObject(Object object) 67 ????{ 68 ????????return JSONObject.fromObject(object); 69 ????} 70 ?71 ????/*** 72 ?????* 将对象转换为HashMap 73 ?????* @param object 74 ?????* @return 75 ?????*/ 76 ????public static HashMap toHashMap(Object object) 77 ????{ 78 ????????HashMap<String, Object> data = new HashMap<String, Object>(); 79 ????????JSONObject jsonObject = JsonTools.toJSONObject(object); 80 ????????Iterator it = jsonObject.keys(); 81 ????????while (it.hasNext()) 82 ????????{ 83 ????????????String key = String.valueOf(it.next()); 84 ????????????Object value = jsonObject.get(key); 85 ????????????data.put(key, value); 86 ????????} 87 ?88 ????????return data; 89 ????} 90 ?91 ?92 ?????93 ?94 ?95 ???96 ????public static <T> T json2Bean(String json, Class<T> beanClass) { ??97 ????????try { ??98 ????????????return objectMapper.readValue(json, beanClass); ??99 ????????} catch (Exception e) { ?100 ????????????log.error(e);101 ????????????new Exception("解析参数出错");102 ????????} ?103 ????????return null; ?104 ????} ?105 106 ????107 ????public static <T> List<T> json2List(String json, Class<T> beanClass) { ?108 ????????try { ?109 ????????????return (List<T>)objectMapper.readValue(json, getCollectionType(List.class, beanClass)); ?110 ????????} catch (Exception e) { ?111 ????????????e.printStackTrace(); ?112 ????????} ?113 ????????return null; ?114 ????} ?115 ????116 ????public static String getJsonFromObject(Object obj) {117 ????????try {118 ????????????return objectMapper.writeValueAsString(obj);119 ????????} catch (Exception e) {120 ????????????e.printStackTrace();121 ????????}122 ????????return null;123 ????}124 ????125 ????public static JavaType getCollectionType(Class<?> collectionClass, Class<?>... elementClasses) { ????126 ????????return objectMapper.getTypeFactory().constructParametricType(collectionClass, elementClasses); ????127 ????} ??128 }