使用jackson美化輸出json/xml

轉載:http://www.cnblogs.com/xiwang/

如何使用jackson美化輸出json/xml

1.美化POJO序列化xml

下面將POJO列化爲xml並打印。spring

Person person = new Person(); //設置person屬性 ObjectMapper mapper = new XmlMapper(); System.out.println(mapper.writeValueAsString(person));

可是輸出爲緊湊模式:django

<Person><name>Hello world</name><age>12</age></Person>

2.目的:美化過的輸出

有時但願可以美化輸出,更方便閱讀和理解,如:json

<Person> <name>Hello world</name> <age>12</age> </Person>

方式1.使用:writerWithDefaultPrettyPrinter

ObjectMapper mapper = new XmlMapper(); System.out.println(mapper.writerWithDefaultPrettyPrinter().writeValueAsString(person)); mapper.enable(SerializationFeature.INDENT_OUTPUT);

方式2.使用:SerializationFeature.INDENT_OUTPUT

ObjectMapper mapper = new XmlMapper(); mapper.enable(SerializationFeature.INDENT_OUTPUT); mapper.writeValueAsString(person);
或者同一設置:
spring.jackson.serialization.indent-output= true
 

3.序列化爲json

序列化爲json時,操做基本一致,只須要使用ObjectMapper替代XmlMapper。如:app

Person person = new Person(); //設置person屬性 ObjectMapper mapper = new ObjectMapper(); System.out.println(mapper.writeValueAsString(person));

激活美化的方式,一樣能夠是2.1和2.2介紹的方式。spa

4.包依賴

序列化爲xml依賴:

  • jackson-databind
  • jackson-core
  • jackson-dataformat-xml

序列化爲json依賴:

  • jackson-databind
  • jackson-core
<dependency> <groupId>com.fasterxml.jackson.dataformat</groupId> <artifactId>jackson-dataformat-xml</artifactId> <version>2.8.2</version> </dependency> <dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-databind</artifactId> <version>2.8.2</version> </dependency> <dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-core</artifactId> <version>2.8.2</version> </dependency>
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