1 package com.chauvet.utils.json;
2
3 import java.io.BufferedReader;
4 import java.io.File;
5 import java.io.FileInputStream;
6 import java.io.FileWriter;
7 import java.io.InputStreamReader;
8 import java.util.List;
9
10 import net.sf.json.JSONArray;
11 import net.sf.json.JSONObject;
12 import net.sf.json.xml.XMLSerializer;
13
14 import org.apache.commons.lang.StringUtils;
15
16 import com.google.gson.Gson;
17 import com.google.gson.GsonBuilder;
18
19
20 public class JsonUtils {
21 private final static Gson gson = new GsonBuilder().setDateFormat("yyyy-MM-dd HH:mm:ss").create();
22 private static XMLSerializer xmlserializer = new XMLSerializer();
23
24 public static Gson getInstance(){
25 return gson;
26 }
27
28 /***
29 * List 转为 JSON
30 * @param list
31 * @return
32 */
33 public static <T> String list2Json(List<T> list) {
34 if(null != list && list.size() > 0){
35 JSONArray jsonArray = JSONArray.fromObject(list);
36 return jsonArray.toString();
37 }
38 return "";
39 }
40
41
42 /***
43 * JSON 转换为 List
44 * @param jsonStr
45 * [{"age":12,"createTime":null,"id":"","name":"wxw","registerTime":null,"sex":1},{...}]
46 * @param objectClass
47 * @return
48 */
49 @SuppressWarnings("unchecked")
50 public static <T> List<T> json2List(String jsonStr, Class<T> objectClass){
51 if (StringUtils.isNotBlank(jsonStr)) {
52 JSONArray jsonArray = JSONArray.fromObject(jsonStr);
53 List<T> list = (List<T>) JSONArray.toCollection(jsonArray, objectClass);
54 return list;
55 }
56 return null;
57 }
58
59
60 /***
61 * Object 转为 JSON
62 * @param object
63 * @return
64 */
65 public static String object2Json(Object object) {
66 if(null != object){
67 JSONArray jsonArray = JSONArray.fromObject(object);
68 return jsonArray.toString();
69 }
70 return "";
71 }
72
73 /***
74 *
75 * JSON 转 Object
76 *
77 * @param jsonStr
78 * [{"age":12,"createTime":null,"id":"","name":"wxw","registerTime":null,"sex":1}]
79 * @param objectClass
80 * @return
81 */
82 @SuppressWarnings("unchecked")
83 public static <T> T json2Ojbect(String jsonStr, Class<T> objectClass){
84 if(null != jsonStr){
85 String leftStr = jsonStr.substring(0,2);
86 String rightStr = jsonStr.substring(jsonStr.length()-2,jsonStr.length());
87 if(leftStr.equals("[{")){
88 jsonStr = jsonStr.substring(1,jsonStr.length());
89 }
90 if(rightStr.equals("}]")){
91 jsonStr = jsonStr.substring(0,jsonStr.length()-1);
92 }
93 JSONObject jsonStu = JSONObject.fromObject(jsonStr);
94 return (T) JSONObject.toBean(jsonStu,objectClass);
95 }
96 return null;
97 }
98
99 /***
100 * JsonArray 转为 JSON
101 * @param jsonArray
102 * @return
103 */
104 public static String jsonArrayToJSONString(JSONArray jsonArray) {
105 if(null != jsonArray){
106 return jsonArray.toString();
107 }
108 return "";
109 }
110
111 /***
112 * JsonObject 转为 JSON
113 * @param jsonObject
114 * @return
115 */
116 public static String jsonObjectToJSONString(JSONObject jsonObject) {
117 if(null != jsonObject){
118 return jsonObject.toString();
119 }
120 return "";
121 }
122
123 /***
124 * 将Object转换为JsonObject
125 * @param object
126 * @return
127 */
128 public static JSONObject object2JsonObject(Object object) {
129 if(null != object){
130 return JSONObject.fromObject(object);
131 }
132 return null;
133 }
134
135
136 /***
137 * XML 转为 JSON
138 * @param xmlString
139 * XML字符串 例如：
140 * <?xml version='1.0' encoding='utf-8'?><cities><province name='北京'><item>东城区</item><item>西城区</item><item>崇文区</item><item>宣武区</item><item>朝阳区</item><item>丰台区</item><item>石景山区</item><item>海淀区</item><item>门头沟区</item><item>房山区</item><item>通州区</item><item>顺义区</item><item>昌平区</item><item>大兴区</item><item>怀柔区</item><item>平谷区</item><item>密云县</item><item>延庆县</item></province></cities>
141 * @return
142 *
143 */
144 public static String xml2json(String xmlString){
145 if(StringUtils.isNotBlank(xmlString)){
146 try {
147 return xmlserializer.read(xmlString).toString();
148 } catch (Exception e) {
149 e.printStackTrace();
150 return null;
151 }
152 }
153 return null;
154 }
155
156 /***
157 * JSON 转为 XML
158 * @param xmlString
159 * XML字符串 例如：
160 * [{'province':{'@name':'北京','item':['东城区','西城区','崇文区','宣武区','朝阳区','丰台区','石景山区','海淀区','门头沟区','房山区','通州区','顺义区','昌平区','大兴区','怀柔区','平谷区','密云县','延庆县']}}]
161 * 或者：
162 * {'province':{'@name':'北京','item':['东城区','西城区','崇文区','宣武区','朝阳区','丰台区','石景山区','海淀区','门头沟区','房山区','通州区','顺义区','昌平区','大兴区','怀柔区','平谷区','密云县','延庆县']}}
163 * @return
164 *
165 */
166 public static String json2xml(String jsonStr){
167 if(StringUtils.isNotBlank(jsonStr)){
168 try {
169 if(jsonStr.contains("[{") && jsonStr.contains("}]")){
170 JSONArray jobj = JSONArray.fromObject(jsonStr);
171 return xmlserializer.write(jobj);
172 }
173 JSONObject jobj = JSONObject.fromObject(jsonStr);
174 return xmlserializer.write(jobj);
175 } catch (Exception e) {
176 e.printStackTrace();
177 return null;
178 }
179 }
180 return null;
181 }
182
183
184 /***
185 * XML/JSON 互转
186 *
187 * @param sourceFilePath
188 * 要解析的文件路径
189 * @param directFilePath
190 * 生成文件存放的路径
191 * @param flag
192 * true:JSON 转为 XML
193 * false:XML转为 JSON
194 * @return
195 */
196 public static String xml2JsonOrjson2Xml(String sourceFilePath,String directFilePath,boolean flag){
197 if(StringUtils.isBlank(sourceFilePath) || StringUtils.isBlank(directFilePath)){
198 return null;
199 }
200 FileInputStream in =null;
201 BufferedReader br = null;
202 FileWriter fw = null;
203 String rs = null;
204 try{
205 File jsonFile = new File(sourceFilePath);
206 in = new FileInputStream(jsonFile);
207 StringBuffer sbuf = new StringBuffer();
208 br = new BufferedReader(new InputStreamReader(in));
209 String temp =null;
210
211 while((temp=br.readLine())!=null){
212 sbuf.append(temp);
213 }
214 if(flag){
215 rs = json2xml(sbuf.toString());
216 }else{
217 rs = xml2json(sbuf.toString());
218 }
219 File test = new File(directFilePath);
220 if(!test.exists()){
221 test.createNewFile();
222 }
223 fw = new FileWriter(test);
224 fw.write(rs);
225 }catch (Exception e) {
226 e.printStackTrace();
227 }finally{
228 try {
229 fw.close();
230 br.close();
231 in.close();
232 } catch (Exception e) {
233 e.printStackTrace();
234 }
235 }
236 return rs;
237 }
238
239
240 public static void main(String[] args) {
241
242 // System.out.println(jfxfTranspose("E:/qwe.json", "E:/qwe.xml", 1));
243
244 // System.out.println(json2xml("[{'province':{'@name':'北京','item':['东城区','西城区','崇文区','宣武区','朝阳区','丰台区','石景山区','海淀区','门头沟区','房山区','通州区','顺义区','昌平区','大兴区','怀柔区','平谷区','密云县','延庆县']}}]"));
245 // System.out.println(xml2json("<?xml version='1.0' encoding='utf-8'?><cities><province name='北京'><item>东城区</item><item>西城区</item><item>崇文区</item><item>宣武区</item><item>朝阳区</item><item>丰台区</item><item>石景山区</item><item>海淀区</item><item>门头沟区</item><item>房山区</item><item>通州区</item><item>顺义区</item><item>昌平区</item><item>大兴区</item><item>怀柔区</item><item>平谷区</item><item>密云县</item><item>延庆县</item></province></cities>"));
246
247 /*User u = new User();
248 u.setName("wxw");
249 u.setAge(12);
250 u.setSex(1);
251 System.out.println(object2JsonObject(u));*/
252
253 /*User u = new User();
254 u.setName("wxw");
255 u.setAge(12);
256 u.setSex(1);
257 System.out.println(object2Json(u));*/
258
259 /*User us = json2Ojbect(object2Json(u), User.class);
260 System.out.println(us);
261 */
262
263 /*List<User> list = new ArrayList<User>();
264 User u = new User();
265 u.setName("wxw");
266 u.setAge(12);
267 u.setSex(1);
268 list.add(u);
269 u = new User();
270 u.setName("zmx");
271 u.setAge(12);
272 u.setSex(0);
273 list.add(u);
274 u = new User();
275 u.setName("arnold");
276 u.setAge(12);
277 u.setSex(1);
278 list.add(u);
279 String str = list2Json(list);
280 System.out.println(str);*/
281
282 /*List<User> userList = converAnswerFormString(str, User.class);
283 System.out.println(userList);
284 */
285
286 }
287 }
