<jackson.version>2.2.3</jackson.version>
<!-- json -->
<dependency>
<groupId>net.sf.json-lib</groupId>
<artifactId>json-lib</artifactId>
<version>2.3</version>
<classifier>jdk15</classifier>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>1.1.41</version>
</dependency>
<!-- jackson json -->
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-core</artifactId>
<version>${jackson.version}</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>${jackson.version}</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-annotations</artifactId>
<version>${jackson.version}</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.module</groupId>
<artifactId>jackson-module-jaxb-annotations</artifactId>
<version>${jackson.version}</version>
</dependency>
package com.dsj.gdbd.utils.jsonUtil;
import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.URL;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;
import org.apache.commons.collections.map.ListOrderedMap;
import org.apache.commons.lang.ObjectUtils;
import org.apache.commons.lang3.StringUtils;
import org.apache.log4j.Logger;
import net.sf.json.JSONArray;
import net.sf.json.JSONObject;
/**
*
* 处理json的工具类. <br>
* 本类为处理json的工具类
*
* @author slj
*/
public class JsonTools {
private static Logger log = Logger.getLogger(JsonTools.class);
/**
*
* json转换list. <br>
* 详细说明
*
* @param jsonStr
* json字符串
* @return
* @return List<Map<String,Object>> list
* @throws @author
* slj
* @date 2013年12月24日 下午1:08:03
*/
public static List<Map<String, Object>> parseJSON2List(String jsonStr) {
JSONArray jsonArr = JSONArray.fromObject(jsonStr);
List<Map<String, Object>> list = new ArrayList<Map<String, Object>>();
Iterator<JSONObject> it = jsonArr.iterator();
while (it.hasNext()) {
JSONObject json2 = it.next();
list.add(parseJSON2Map(json2.toString()));
}
return list;
}
/**
*
* json转换map. <br>
* 详细说明
*
* @param jsonStr
* json字符串
* @return
* @return Map<String,Object> 集合
* @throws @author
* slj
*/
public static Map<String, Object> parseJSON2Map(String jsonStr) {
ListOrderedMap map = new ListOrderedMap();
// 最外层解析
JSONObject json = JSONObject.fromObject(jsonStr);
for (Object k : json.keySet()) {
Object v = json.get(k);
// 如果内层还是数组的话，继续解析
if (v instanceof JSONArray) {
List<Map<String, Object>> list = new ArrayList<Map<String, Object>>();
Iterator<JSONObject> it = ((JSONArray) v).iterator();
while (it.hasNext()) {
JSONObject json2 = it.next();
list.add(parseJSON2Map(json2.toString()));
}
map.put(k.toString(), list);
} else {
map.put(k.toString(), v);
}
}
return map;
}
/**
*
* 通过HTTP获取JSON数据. <br>
* 通过HTTP获取JSON数据返回list
*
* @param url
* 链接
* @return
* @return List<Map<String,Object>> list
* @throws @author
* slj
*/
public static List<Map<String, Object>> getListByUrl(String url) {
try {
// 通过HTTP获取JSON数据
InputStream in = new URL(url).openStream();
BufferedReader reader = new BufferedReader(new InputStreamReader(in));
StringBuilder sb = new StringBuilder();
String line;
while ((line = reader.readLine()) != null) {
sb.append(line);
}
return parseJSON2List(sb.toString());
} catch (Exception e) {
log.error("Exception", e);
}
return null;
}
/**
*
* 通过HTTP获取JSON数据. <br>
* 通过HTTP获取JSON数据返回map
*
* @param url
* 链接
* @return
* @return Map<String,Object> 集合
* @throws @author
* slj
*/
public static Map<String, Object> getMapByUrl(String url) {
try {
// 通过HTTP获取JSON数据
InputStream in = new URL(url).openStream();
BufferedReader reader = new BufferedReader(new InputStreamReader(in));
StringBuilder sb = new StringBuilder();
String line;
while ((line = reader.readLine()) != null) {
sb.append(line);
}
return parseJSON2Map(sb.toString());
} catch (Exception e) {
log.error("Exception", e);
}
return null;
}
/**
*
* map转换json. <br>
* 详细说明
*
* @param map
* 集合
* @return
* @return String json字符串
* @throws @author
* slj
*/
public static String mapToJson(Map<String, Object> map) {
Set<String> keys = map.keySet();
String key="";
StringBuffer jsonBuffer = new StringBuffer();
jsonBuffer.append("{");
for (Iterator<String> it = keys.iterator(); it.hasNext();) {
key = (String) it.next();
String value = ObjectUtils.toString(map.get(key), "");
jsonBuffer.append(key + ":" + "\"" + value + "\"");
if (it.hasNext()) {
jsonBuffer.append(",");
}
}
jsonBuffer.append("}");
return jsonBuffer.toString();
}
/**
*
* map转换json. <br>
* 详细说明
*
* @param map
* 集合
* @return
* @return String json字符串
* @throws @author
* slj
*/
public static String mapToKvJson(Map<String, Object> map) {
Set<String> keys = map.keySet();
JSONArray jsonArray=new JSONArray();
String key = "";
for (Iterator<String> it = keys.iterator(); it.hasNext();) {
JSONObject object = new JSONObject();
key = (String) it.next();
String value = ObjectUtils.toString(map.get(key), "");
object.put("key", key);
object.put("value", value);
jsonArray.add(object);
}
return jsonArray.toString();
}
/**
* key value转map
[{"name":"sEcho","value":1},{"name":"iColumns","value":3}]转map
* @param jsonStr
* @return
*/
public static Map<String, Object> parsePageMap(String jsonStr){
Map<String, Object> map = new HashMap<String, Object>();
//最外层解析
if(StringUtils.isNotBlank(jsonStr)){
jsonStr=jsonStr.replace(""", "\"");
}
JSONArray jsonArray = JSONArray.fromObject(jsonStr);
for (int i = 0; i < jsonArray.size(); i++) {
JSONObject json = (JSONObject) jsonArray.get(i);
map.put(json.getString("name"), json.getString("value"));
}
return map;
}
// test
public static void main(String[] args) {
Map<String, Object> map=new HashMap<String, Object>();
map.put("2", "1");
map.put("3", "1");
System.out.println(mapToKvJson(map));
}
}