Java - 格式化输出JSON字符串的两种
发布时间：2021-12-05 10:50:31 所属栏目：教程 来源：互联网
导读：Java - 格式化输出JSON字符串的两种方式 1 使用阿里的FastJson 1.1 项目的pom.xml依赖 dependency groupIdcom.alibaba/groupId artifactIdfastjson/artifactId version1.2.58/version /dependency 1.2 Java示例代码 (1) 导入的包: com.alibaba.fastjson.JSON
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Java - 格式化输出JSON字符串的两种方式 1 使用阿里的FastJson 1.1 项目的pom.xml依赖 <dependency> <groupId>com.alibaba</groupId> <artifactId>fastjson</artifactId> <version>1.2.58</version> </dependency> 1.2 Java示例代码 (1) 导入的包: com.alibaba.fastjson.JSON; import com.alibaba.fastjson.JSONObject; import com.alibaba.fastjson.serializer.SerializerFeature; (2) 测试代码: 其中JSON字符串为: {"_index":"book_shop","_type":"it_book","_id":"1","_score":1.0,"_source":{"name": "Java编程思想（第4版）","author": "[美] Bruce Eckel","category": "编程语言","price": 109.0,"publisher": "机械工业出版社","date": "2007-06-01","tags": [ "Java", "编程语言" ]}} public static void main(String[] args) { String jsonString = "{"_index":"book_shop","_type":"it_book","_id":"1","_score":1.0," + ""_source":{"name": "Java编程思想（第4版）","author": "[美] Bruce Eckel","category": "编程语言"," + ""price": 109.0,"publisher": "机械工业出版社","date": "2007-06-01","tags": [ "Java", "编程语言" ]}}"; JSONObject object = JSONObject.parseObject(jsonString); String pretty = JSON.toJSONString(object, SerializerFeature.PrettyFormat, SerializerFeature.WriteMapNullValue, SerializerFeature.WriteDateUseDateFormat); System.out.println(pretty); } (3) 格式化输出后的结果: 说明: FastJson通过Tab键进行换行后的格式化. { "_index":"book_shop", "_type":"it_book", "_source":{ "date":"2007-06-01", "author":"[美] Bruce Eckel", "price":109.0, "name":"Java编程思想（第4版）", "publisher":"机械工业出版社", "category":"编程语言", "tags":[ "Java", "编程语言" ] }, "_id":"1", "_score":1.0 } 2 使用谷歌的Gson 2.1 项目的pom.xml依赖 <dependency> <groupId>com.google.code.gson</groupId> <artifactId>gson</artifactId> <version>2.2.4</version> </dependency> 2.2 Java示例代码 (1) 导入的包: import com.google.gson.Gson; import com.google.gson.GsonBuilder; import com.google.gson.JsonArray; import com.google.gson.JsonElement; import com.google.gson.JsonObject; import com.google.gson.JsonParser; (2) 测试代码: JSON字符串与上述测试代码相同. public static void main(String[] args) { String jsonString = "{"_index":"book_shop","_type":"it_book","_id":"1","_score":1.0," + ""_source":{"name": "Java编程思想（第4版）","author": "[美] Bruce Eckel","category": "编程语言"," + ""price": 109.0,"publisher": "机械工业出版社","date": "2007-06-01","tags": [ "Java", "编程语言" ]}}"; String pretty = toPrettyFormat(jsonString) System.out.println(pretty); } /** * 格式化输出JSON字符串 * @return 格式化后的JSON字符串 */ private static String toPrettyFormat(String json) { JsonParser jsonParser = new JsonParser(); JsonObject jsonObject = jsonParser.parse(json).getAsJsonObject(); Gson gson = new GsonBuilder().setPrettyPrinting().create(); return gson.toJson(jsonObject); } (3) 格式化输出后的结果: 说明: Gson使用2个空格作为换行后的格式转换. { "_index": "book_shop", "_type": "it_book", "_id": "1", "_score": 1.0, "_source": { "name": "Java编程思想（第4版）", "author": "[美] Bruce Eckel", "category": "编程语言", "price": 109.0, "publisher": "机械工业出版社", "date": "2007-06-01", "tags": [ "Java", "编程语言" ] } }  （编辑：青岛站长网） 【声明】本站内容均来自网络，其相关言论仅代表作者个人观点，不代表本站立场。若无意侵犯到您的权利，请及时与联系站长删除相关内容! |
