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柚子快報激活碼778899分享：java Json字符串

柚子快報激活碼778899分享：java Json字符串

http://yzkb.51969.com/

json值格式

?數(shù)字（整數(shù)或浮點數(shù)）

?字符串（在雙引號中）

?邏輯值（true或 false）

?null

?數(shù)組（在方括號中） 例如：{"Teachers":["roy","will"]}

String arrayJson="[1,3,4]";

//轉換成json數(shù)組（用JSON.paraseArray）

JSONArray arrayJO=JSON.parseArray(arrayJson);

//jsonArray通過下標獲取存儲的第二個元素

System.out.println("存儲的第二個元素是"+arrayJO.get(1));

#輸出結果

存儲的第二個元素是3

?對象（在花括號中） 例如：{"course":{"teacher":"roy","courese":"java"}}

#例1： jsonString值

String jsonString="{\"status\":200,\"msg\":\"查詢成功\",\"nickname\":\"測試賬號\",\"id\":\"12831\",\"describe\":\"will的測試賬號\"}";

//轉換成json 對象（用JSON.paraseObject）

JSONObject jsonObject=JSON.parseObject(jsonString);

System.out.println(jsonObject);

//jsonObject通過鍵的方式獲取值

System.out.println("Nickname的值是"+jsonObject.get("nickname"));

#輸出結果

# jsonString值輸出結果

{"msg":"查詢成功","nickname":"測試賬號","id":"12831","describe":"will的測試賬號","status":200}

Nickname的值是測試賬號

#例2：Object值

//將對象的屬性寫成 鍵:值的格式。

WashMachine wm=new WashMachine();

//*object或其他格式使用toJSONString方法轉成JSON格式的字符串

String s =JSON.toJSONString(wm);

System.out.println(s);

//將字符串轉成JSONobject

JSONObject jsonObject= JSON.parseObject(s);

System.out.println(jsonObject);

//獲取某個值

Object canUse=jsonObject.get("canUse");

#輸出結果

#Object值輸出結果

{"age":10,"brand":"米","canUse":false,"capacity":90,"desc":["美觀","大氣","有烘干功能"],"dog":{"age":0,"ear":"尖尖的耳朵"},"king":"電器","price":0.0,"weight":40}

false

json的使用

#Json的使用

//刪

jsonObject.remove("brand");

System.out.println(jsonObject);

//改

jsonObject.replace("king","洗衣機");

System.out.println(jsonObject);

//增

jsonObject.put("volume","38");

System.out.println(jsonObject);

//遍歷 json字符串中的不同類型格式所對應的json處理方式

//對象object使用keyset()去遍歷

for (String key : jsonObject.keySet()) {

//先獲取到Object類型

Object value=jsonObject.get(key);

if(value instanceof String){

System.out.println(value+"是個字符串");

//強轉數(shù)據(jù)類型成String

// String value1=(String)value;

}else if(value instanceof Boolean){

System.out.println(value+"是個布爾值");

}else if(value instanceof BigDecimal){

System.out.println(value+"是個浮點數(shù)");

}else if(value instanceof Integer){

System.out.println(value+"是個整數(shù)");

}else if(value instanceof JSONObject){

System.out.println(value+"是個json對象");

}else if(value instanceof JSONArray){

System.out.println(value+"是個json數(shù)組");

}

}

#輸出結果

//刪

{"king":"電器","price":0.0,"weight":40,"dog":{"ear":"尖尖的耳朵","age":0},"age":10,"canUse":false,"capacity":90,"desc":["美觀","大氣","有烘干功能"]}

//改

{"king":"洗衣機","price":0.0,"weight":40,"dog":{"ear":"尖尖的耳朵","age":0},"age":10,"canUse":false,"capacity":90,"desc":["美觀","大氣","有烘干功能"]}

//增

{"volume":"38","king":"洗衣機","price":0.0,"weight":40,"dog":{"ear":"尖尖的耳朵","age":0},"age":10,"canUse":false,"capacity":90,"desc":["美觀","大氣","有烘干功能"]}

//遍歷

38是個字符串

洗衣機是個字符串

0.0是個浮點數(shù)

40是個整數(shù)

{"ear":"尖尖的耳朵","age":0}是個json對象

10是個整數(shù)

false是個布爾值

90是個整數(shù)

["美觀","大氣","有烘干功能"]是個json數(shù)組

狗對象的耳朵屬性是尖尖的耳朵

獲取desc數(shù)組中的第二個值是有烘干功能

尖尖的耳朵

米是個字符串

Json的解析

方法1：直接解析

String s="jQuery1102004922028985799365_1676625243870({\"Srcid\":\"5809\",\"ResultCode\":\"0\",\"status\":\"0\",\"QueryID\":\"2479201133\",\"Result\":[{\"DisplayData\":{\"strategy\":{\"tempName\":\"ip\",\"precharge\":\"0\",\"ctplOrPhp\":\"1\"},\"resultData\":{\"tplData\":{\"srcid\":\"5809\",\"resourceid\":\"5809\",\"OriginQuery\":\"163.228.65.13\",\"origipquery\":\"163.228.65.13\",\"query\":\"163.228.65.13\",\"origip\":\"163.228.65.13\",\"location\":\"\\u4e0a\\u6d77\\u5e02 \\u5fae\\u8f6f\\u4e91\",\"userip\":\"\",\"showlamp\":\"1\",\"tplt\":\"ip\",\"titlecont\":\"IP\\u5730\\u5740\\u67e5\\u8be2\",\"realurl\":\"http:\\/\\/www.ip138.com\\/\",\"showLikeShare\":\"1\",\"shareImage\":\"1\",\"data_source\":\"AE\"},\"extData\":{\"tplt\":\"ip\",\"resourceid\":\"5809\",\"OriginQuery\":\"163.228.65.13\"}}},\"ResultURL\":\"http:\\/\\/www.ip138.com\\/\",\"Weight\":\"2\",\"Sort\":\"1\",\"SrcID\":\"5809\",\"ClickNeed\":\"0\",\"SubResult\":[],\"SubResNum\":\"0\",\"ar_passthrough\":[],\"RecoverCacheTime\":\"0\"}],\"data\":[{\"srcid\":\"5809\",\"resourceid\":\"5809\",\"OriginQuery\":\"163.228.65.13\",\"origipquery\":\"163.228.65.13\",\"query\":\"163.228.65.13\",\"origip\":\"163.228.65.13\",\"location\":\"\\u4e0a\\u6d77\\u5e02 \\u5fae\\u8f6f\\u4e91\",\"userip\":\"\",\"showlamp\":\"1\",\"tplt\":\"ip\",\"titlecont\":\"IP\\u5730\\u5740\\u67e5\\u8be2\",\"realurl\":\"http:\\/\\/www.ip138.com\\/\",\"showLikeShare\":\"1\",\"shareImage\":\"1\"}],\"ResultNum\":\"1\"})";

//直接解析

JSONObject tplDataJson=jsonObject.getJSONArray("Result").getJSONObject(0).getJSONObject("DisplayData").getJSONObject("resultData").getJSONObject("tplData");

//用object的keyset去遍歷

for (String key : tplDataJson.keySet()) {

System.out.println(key+"的值是"+tplDataJson.get(key));

}

#輸出結果

resourceid的值是5809

OriginQuery的值是163.228.65.13

origipquery的值是163.228.65.13

query的值是163.228.65.13

shareImage的值是1

origip的值是163.228.65.13

showlamp的值是1

data_source的值是AE

tplt的值是ip

titlecont的值是IP地址查詢

srcid的值是5809

realurl的值是http://www.ip138.com/

userip的值是

location的值是上海市 微軟云

showLikeShare的值是1

方法2：JsonPath解析

$是表示根目錄，.(點)是表示下一層級

String s="jQuery1102004922028985799365_1676625243870({\"Srcid\":\"5809\",\"ResultCode\":\"0\",\"status\":\"0\",\"QueryID\":\"2479201133\",\"Result\":[{\"DisplayData\":{\"strategy\":{\"tempName\":\"ip\",\"precharge\":\"0\",\"ctplOrPhp\":\"1\"},\"resultData\":{\"tplData\":{\"srcid\":\"5809\",\"resourceid\":\"5809\",\"OriginQuery\":\"163.228.65.13\",\"origipquery\":\"163.228.65.13\",\"query\":\"163.228.65.13\",\"origip\":\"163.228.65.13\",\"location\":\"\\u4e0a\\u6d77\\u5e02 \\u5fae\\u8f6f\\u4e91\",\"userip\":\"\",\"showlamp\":\"1\",\"tplt\":\"ip\",\"titlecont\":\"IP\\u5730\\u5740\\u67e5\\u8be2\",\"realurl\":\"http:\\/\\/www.ip138.com\\/\",\"showLikeShare\":\"1\",\"shareImage\":\"1\",\"data_source\":\"AE\"},\"extData\":{\"tplt\":\"ip\",\"resourceid\":\"5809\",\"OriginQuery\":\"163.228.65.13\"}}},\"ResultURL\":\"http:\\/\\/www.ip138.com\\/\",\"Weight\":\"2\",\"Sort\":\"1\",\"SrcID\":\"5809\",\"ClickNeed\":\"0\",\"SubResult\":[],\"SubResNum\":\"0\",\"ar_passthrough\":[],\"RecoverCacheTime\":\"0\"}],\"data\":[{\"srcid\":\"5809\",\"resourceid\":\"5809\",\"OriginQuery\":\"163.228.65.13\",\"origipquery\":\"163.228.65.13\",\"query\":\"163.228.65.13\",\"origip\":\"163.228.65.13\",\"location\":\"\\u4e0a\\u6d77\\u5e02 \\u5fae\\u8f6f\\u4e91\",\"userip\":\"\",\"showlamp\":\"1\",\"tplt\":\"ip\",\"titlecont\":\"IP\\u5730\\u5740\\u67e5\\u8be2\",\"realurl\":\"http:\\/\\/www.ip138.com\\/\",\"showLikeShare\":\"1\",\"shareImage\":\"1\"}],\"ResultNum\":\"1\"})";

//用Jsonpath解析，然后用toString轉成字符串

String tplDataString= JSONPath.read(json, "$.Result.DisplayData.resultData.tplData").toString();

System.out.println(tplDataString);

#輸出結果

[{"resourceid":"5809","OriginQuery":"163.228.65.13","origipquery":"163.228.65.13","query":"163.228.65.13","shareImage":"1","origip":"163.228.65.13","showlamp":"1","data_source":"AE","tplt":"ip","titlecont":"IP地址查詢","srcid":"5809","realurl":"http://www.ip138.com/","userip":"","location":"上海市 微軟云","showLikeShare":"1"}]

4.Json與其他類型的轉換

Json轉成Map

#Json字符串轉成Map

String s="{resourceid=5809, OriginQuery=163.228.65.13, origipquery=163.228.65.13, query=163.228.65.13, shareImage=1, origip=163.228.65.13, showlamp=1, data_source=AE, tplt=ip, titlecont=IP地址查詢, srcid=5809, realurl=http://www.ip138.com/, userip=, location=上海市 微軟云, showLikeShare=1}"；

#方法1

//先把字符串轉成object

JsonObject tplDataJson=JSONObject.paraseObject(s);

//然后通過object.keyset()遍歷鍵值加到map中，就實現(xiàn)了map的轉化

Map map=new HashMap<>();

for (String key : tplDataJson.keySet()) {

map.put(key, tplDataJson.getString(key));

}

System.out.println(map);

#方法2

//直接用JSONObject.paraseObject()方法直接轉

HashMap hashMap= JSONObject.parseObject(s,HashMap.class);

System.out.println(hashMap);

#輸出結果

#方法1

{resourceid=5809, OriginQuery=163.228.65.13, origipquery=163.228.65.13, query=163.228.65.13, shareImage=1, origip=163.228.65.13, showlamp=1, data_source=AE, tplt=ip, titlecont=IP地址查詢, srcid=5809, realurl=http://www.ip138.com/, userip=, location=上海市 微軟云, showLikeShare=1}

#方法2

{resourceid=5809, OriginQuery=163.228.65.13, origipquery=163.228.65.13, query=163.228.65.13, shareImage=1, origip=163.228.65.13, showlamp=1, data_source=AE, tplt=ip, titlecont=IP地址查詢, srcid=5809, realurl=http://www.ip138.com/, userip=, location=上海市 微軟云, showLikeShare=1}

Map轉成json

將map拼接為json字符串

//注意Json的格式：鍵一定有雙引號，值不一定，值只有字符串的時候才有雙引號

String reJson="{";

//遍歷map中的每個鍵

for (String key : map.keySet()) {

if(map.get(key) instanceof String) {

//值是字符串的時候

//拼接鍵和值：“鍵”："map.get(key)"

reJson+=String.format("\"%s\":\"%s\",", key, map.get(key));

}else {

//值不是字符串的時候，“鍵”：map.get(key)

reJson+=String.format("\"%s\":%s,", key, map.get(key));

}

}

reJson=reJson.substring(0,reJson.length()-1)+"}";

System.out.println(reJson);

#輸出結果

{"resourceid":"5809","OriginQuery":"163.228.65.13","origipquery":"163.228.65.13","query":"163.228.65.13","shareImage":"1","origip":"163.228.65.13","showlamp":"1","data_source":"AE","tplt":"ip","titlecont":"IP地址查詢","srcid":"5809","realurl":"http://www.ip138.com/","userip":"","location":"上海市 微軟云","showLikeShare":"1"}

Json轉成其他類型

#Json轉成JsonObject

JSONObject jsonObject=JSONObject.parseObject(json字符串);

#Json轉成字符串

String s= (json字符串).toString();

#對象可以轉成json字符串

//將對象的屬性寫成 鍵:值的格式。

WashMachine wm=new WashMachine();

//其他格式轉成JSON格式的字符串

String s =JSON.toJSONString(wm);

柚子快報激活碼778899分享：java Json字符串

http://yzkb.51969.com/

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