📅  最后修改于: 2020-11-16 07:36:19             🧑  作者: Mango
@JsonSerialize用于指定自定义序列化器以编组json对象。
import java.io.IOException;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.SerializerProvider;
import com.fasterxml.jackson.databind.annotation.JsonSerialize;
import com.fasterxml.jackson.databind.ser.std.StdSerializer;
public class JacksonTester {
public static void main(String args[]) throws ParseException {
ObjectMapper mapper = new ObjectMapper();
SimpleDateFormat dateFormat = new SimpleDateFormat("dd-MM-yyyy");
try {
Student student = new Student("Mark", 1, dateFormat.parse("20-11-1984"));
String jsonString = mapper
.writerWithDefaultPrettyPrinter()
.writeValueAsString(student);
System.out.println(jsonString);
}
catch (IOException e) {
e.printStackTrace();
}
}
}
class Student {
private String name;
private int rollNo;
@JsonSerialize(using = CustomDateSerializer.class)
private Date dateOfBirth;
public Student(String name, int rollNo, Date dob){
this.name = name;
this.rollNo = rollNo;
this.dateOfBirth = dob;
}
public String getName(){
return name;
}
public int getRollNo(){
return rollNo;
}
public Date getDateOfBirth(){
return dateOfBirth;
}
}
class CustomDateSerializer extends StdSerializer {
private static final long serialVersionUID = 1L;
private static SimpleDateFormat formatter = new SimpleDateFormat("dd-MM-yyyy");
public CustomDateSerializer() {
this(null);
}
public CustomDateSerializer(Class t) {
super(t);
}
@Override
public void serialize(Date value,
JsonGenerator generator, SerializerProvider arg2) throws IOException {
generator.writeString(formatter.format(value));
}
}
{
"name" : "Mark",
"rollNo" : 1,
"dateOfBirth" : "20-11-1984"
}