如何获得精美打印的JSON代码的紧凑形式？ [英] How do I get the compact form of pretty-printed JSON code?

问题描述

如何制作杰克逊的build（）方法是否打印出它的JSON输出？这是一个漂亮打印丑陋形式的JSON代码的例子。我需要使用JSON代码的漂亮版本然后将其转移到丑陋的fom。怎么做到呢？
我需要兑换这个：

How do I make Jackson's build() method pretty-print its JSON output? Here is an example that pretty-prints the ugly form of JSON code. I need to take the nice version of JSON code then convet it to ugly fom. How can it be done? I need to convert this:

 {
   "one" : "AAA",
   "two" : [ "BBB", "CCC" ],
   "three" : {
     "four" : "DDD",
     "five" : [ "EEE", "FFF" ]
   }
 }

到此：

{"one":"AAA","two":["BBB","CCC"],"three":{"four":"DDD","five":["EEE","FFF"]}}

I试图删除'\ n'，'\t'和''字符;但是值中可能有一些这样的字符，所以我不能这样做。还有什么可以做？

I tried to remove '\n', '\t', and ' ' characters; but there may be some of these characters in values so I can't do that. What else can be done?

推荐答案

杰克逊允许你读取一个JSON字符串，所以读取漂亮的字符串回到杰克逊然后再次输出它并禁用漂亮打印。

Jackson allows you to read from a JSON string, so read the pretty-printed string back into Jackson and then output it again with pretty-print disabled.

参见将字符串转换为JSON

简单示例

    String prettyJsonString = "{ \"Hello\" : \"world\"}";
    ObjectMapper objectMapper = new ObjectMapper();
    JsonNode jsonNode = objectMapper.readValue(prettyJsonString, JsonNode.class);
    System.out.println(jsonNode.toString());

需要

<dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-core</artifactId>
    <version>2.5.3</version>
</dependency>
<dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-databind</artifactId>
    <version>2.5.3</version>
</dependency>

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