JSONObject——JSONArray——Map——String——List之间转换
import net.sf.json.JSONArray; import net.sf.json.JSONObject; import java.util.*; /** * Created by admin on 2018/7/17. */ public class test { public static void main(String[] args) { // 1.String转JSONObject String jsonString = "{\"Chinese\":\"88\",\"Math\":\"78\",\"English\":\"99\"}"; JSONObject myJson = JSONObject.fromObject(jsonString); System.out.println("Chinese:" + myJson.get("Chinese")); System.out.println("Math:" + myJson.get("Math")); System.out.println("English:" + myJson.get("English")); System.out.println("------------------String转JSONObject------------------------"); // 2.String转JSONArray String jsonMessage = "[{'num':'成绩', '外语':88, '历史':65, '地理':99, 'object':{'aaa':'1111','bbb':'2222','cccc':'3333'}}," + "{'num':'兴趣', '外语':28, '历史':45, '地理':19, 'object':{'aaa':'11a11','bbb':'2222','cccc':'3333'}}," + "{'num':'爱好', '外语':48, '历史':62, '地理':39, 'object':{'aaa':'11c11','bbb':'2222','cccc':'3333'}}]"; JSONArray myJsonArray = JSONArray.fromObject(jsonMessage); System.out.println(myJsonArray); System.out.println("------------------String转JSONArray------------------------"); // String转Map jsonMessage = "{\"Chinese\":\"88\",\"Math\":\"78\",\"English\":\"99\"}"; Map m = (Map) JSONObject.fromObject(jsonMessage); System.out.println("Chinese:" + m.get("Chinese")); System.out.println("Math:" + m.get("Math")); System.out.println("English:" + m.get("English")); System.out.println("------------------String转Map------------------------"); // List转JSONArray List list = new ArrayList(); list.add("{'num':'成绩', '外语':88, '历史':65, '地理':99, 'object':{'aaa':'1111','bbb':'2222','cccc':'3333'}}"); list.add("{'num':'兴趣', '外语':28, '历史':45, '地理':19, 'object':{'aaa':'11a11','bbb':'2222','cccc':'3333'}}"); list.add("{'num':'爱好', '外语':48, '历史':62, '地理':39, 'object':{'aaa':'11c11','bbb':'2222','cccc':'3333'}}"); JSONArray jsonArray2 = JSONArray.fromObject(list); System.out.println(jsonArray2); System.out.println("------------------jsonArray2------------------------"); // JSONArray转List List<Map<String, Object>> mapListJson = (List) jsonArray2; System.out.println(mapListJson); System.out.println("------------------mapListJson------------------------"); // String转数组 String string = "a,b,c"; String[] stringArr = string.split(","); //注意分隔符是需要转译滴... 如果是"abc"这种字符串,就直接 System.out.println("stringArr:" + Arrays.asList(stringArr)); string = "abc"; char[] stringArr1 = string.toCharArray(); //注意返回值是char数组 如果要返回byte数组就直接使用getBytes方法就ok了 ~~ System.out.println("stringArr1:" + Arrays.toString(stringArr1)); //基本类型可以用Arrays.toString string = "abc"; byte[] stringArr2 = string.getBytes(); System.out.println("stringArr2:" + Arrays.toString(stringArr2)); //基本类型可以用Arrays.toString // 数组转String char[] data = {'a', 'b', 'c'}; String s = new String(data); System.out.println("s=" + s); } }
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