Java ObjectMapper 格式化输出 JSON
Java JSON Jackson About 755 words优雅输出
使用writerWithDefaultPrettyPrinter
方法。
public static void main(String[] args) throws JsonProcessingException {
User user = new User();
user.age = 20;
user.username = "test";
user.hobbies = Arrays.asList("x", "y", "z").toArray(new String[]{});
user.phones = new HashSet<String>(Arrays.asList("a", "b", "c"));
user.valid = true;
ObjectMapper objectMapper = new ObjectMapper();
String value = objectMapper.writerWithDefaultPrettyPrinter().writeValueAsString(user);
System.out.println(value);
}
输出
{
"age" : 20,
"username" : "test",
"hobbies" : [ "x", "y", "z" ],
"phones" : [ "a", "b", "c" ],
"valid" : true
}
完整代码
https://github.com/fendoudebb/learning/tree/master/java/learn-spring-boot/object-mapper
Views: 7,026 · Posted: 2020-05-27
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