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java 怎么转义json字符
你要字符串转json格式，还是json转字符串？
JSONObject json_result = new JSONObject();
json_result.put("userId","");
JSONObject initParame = new JSONObject();
initParame.put("contextConfigLocation", "cfl");
json_result.put("initParameterNamesMaps", initParame);
System.out.println(json_result);
这个是字符串转json,你要导入json包
java中字符串怎么转json？
string类型如果要转换成json的话，就需要写成这样的形式，如下：x0dx0aString jsonStr ="{'id':'11','parentId':'root','refObj':{'existType':'exist','deptType':'emp','treeNodeType':'dept'}}";x0dx0a JSONObject jsonObj = new JSONObject(jsonStr);x0dx0a JSONObject refObj = new JSONObject(jsonObj.getString("refObj"));x0dx0a String existType = refObj.getString("existType");x0dx0a System.out.println(existType);x0dx0ajar使用的是org.json.jar
java Json 串中的转义字符
一：解析普通json
1：不带转化字符
格式{"type":"ONLINE_SHIPS","message":{"currentTime":1400077615368,"direction":0,"id":1,"latitude":29.5506,"longitude":106.6466}}
JSONObject jsonObject = new JSONObject(jsonstr).getJSONObject("message");
System.out.println("currentTime:"+jsonObject.get("currentTime"));
System.out.println("direction:"+jsonObject.get("direction"));
System.out.println("latitude:"+jsonObject.get("latitude"));
System.out.println("longitude:"+jsonObject.get("longitude"));
jsonarray
JSONObject jo = ja.getJSONArray("cargoList").getJSONObject(0);
2:带转义字符的json格式
{"type":"ONLINE_SHIPS","message":"{"currentTime":1400077615368,"direction":0,"id":1,"latitude":29.5506,"longitude":106.6466}"}
其实也很简单，先把它转化成字符串就可以了
JSONObject jsonObject = new JSONObject(jsonstr);
//先通过字符串的方式得到,转义字符自然会被转化掉
String jsonstrtemp = jsonObject.getString("message");
System.out.println("message:"+jsonstrtemp);
jsonObject = new JSONObject(jsonstrtemp);
System.out.println("currentTime:"+jsonObject.get("currentTime"));
System.out.println("direction:"+jsonObject.get("direction"));
System.out.println("latitude:"+jsonObject.get("latitude"));
System.out.println("longitude:"+jsonObject.get("longitude"));
二：遍历Json对象
JSONObject ports = ja.getJSONObject("ports");
IteratorString keys = ports.keys();
while(keys.hasNext()){
String key=keys.next();
String value = ports.getString(key);
}
三：使用Gjson,json与对象相互转化
使用Gson轻松将java对象转化为json格式
String json = gson.toJson(Object);//得到json形式的字符串
User user = gson.fromJson(json,User.class);//得到对象
转化成list
import java.util.List;
import com.google.gson.Gson;
import com.google.gson.reflect.TypeToken;
import com.lc.function.Action;
import com.lc.models.Groups;
public class MapSearch {
private void ParseData(String _data)
{
Gson gson = new Gson();
ListGroups ps = gson.fromJson(_data, new TypeTokenListGroups(){}.getType());
System.out.println(ps.get(0).getGroup_name());
}
}