Jackson Annotations 简明教程

Jackson Annotations - @JsonRawValue

@JsonRawValue 允许序列化文本，无需转义或任何装饰。

Example without @JsonRawValue

import java.io.IOException;
import com.fasterxml.jackson.databind.ObjectMapper;

public class JacksonTester {
   public static void main(String args[]){
      ObjectMapper mapper = new ObjectMapper();
      try {
         Student student = new Student("Mark", 1, "{\"attr\":false}");
         String jsonString = mapper
            .writerWithDefaultPrettyPrinter()
            .writeValueAsString(student);
         System.out.println(jsonString);
      }
      catch (IOException e) {
         e.printStackTrace();
      }
   }
}
class Student {
   private String name;
   private int rollNo;
   private String json;
   public Student(String name, int rollNo, String json){
      this.name = name;
      this.rollNo = rollNo;
      this.json = json;
   }
   public String getName(){
      return name;
   }
   public int getRollNo(){
      return rollNo;
   }
   public String getJson(){
      return json;
   }
}

Output

{
   "name" : "Mark",
   "rollNo" : 1,
   "json" : {\"attr\":false}
}

Example with @JsonRawValue

import java.io.IOException;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.annotation.JsonRawValue;

public class JacksonTester {
   public static void main(String args[]){
      ObjectMapper mapper = new ObjectMapper();
      try {
         Student student = new Student("Mark", 1, "{\"attr\":false}");
         String jsonString = mapper
            .writerWithDefaultPrettyPrinter()
            .writeValueAsString(student);
         System.out.println(jsonString);
      }
      catch (IOException e) {
         e.printStackTrace();
      }
   }
}
class Student {
   private String name;
   private int rollNo;
   @JsonRawValue
   private String json;
   public Student(String name, int rollNo, String json) {
      this.name = name;
      this.rollNo = rollNo;
      this.json = json;
   }
   public String getName(){
      return name;
   }
   public int getRollNo(){
      return rollNo;
   }
   public String getJson(){
      return json;
   }
}

Output

{
   "name" : "Mark",
   "rollNo" : 1,
   "json" : {"attr":false}
}