@jsonmanagedreference 和 @jsonbackreference 注释可用于在中创建 json 结构>双向方式。 @jsonmanagedreference 注释是在序列化过程中包含的前向引用，而 @jsonbackreference 注释是反向引用，在序列化过程中省略。
在下面的示例中，我们可以实现 @jsonmanagedreference 和 @jsonbackreference 注解。
示例
import java.util.*;
import com.fasterxml.jackson.annotation.jsonmanagedreference;
import com.fasterxml.jackson.annotation.jsonbackreference;
import com.fasterxml.jackson.databind.objectmapper;
import com.fasterxml.jackson.core.jsonprocessingexception;
public class managedreferencebackreferencetest {
public static void main(string args[]) throws jsonprocessingexception {
backreferencebeantest testbean = new backreferencebeantest(110, "sai chaitanya");
managedreferencebeantest bean = new managedreferencebeantest(135, "adithya ram", testbean);
testbean.addemployees(bean);
objectmapper mapper = new objectmapper();
string jsonstring = mapper.writerwithdefaultprettyprinter().writevalueasstring(bean);
system.out.println(jsonstring);
}
}
class managedreferencebeantest {
public int empid = 115;
public string empname = "raja ramesh";
@jsonmanagedreference
public backreferencebeantest manager;
public managedreferencebeantest(int empid, string empname, backreferencebeantest manager) {
this.empid = empid;
this.empname = empname;
this.manager = manager;
}
}
class backreferencebeantest {
public int empid = 125;
public string empname = "jai dev";
@jsonbackreference
public list list;
public backreferencebeantest(int empid, string empname) {
this.empid = empid;
this.empname = empname;
list = new arraylist();
}
public void addemployees(managedreferencebeantest managedreferencebeantest) {
list.add(managedreferencebeantest);
}
}
输出
{
"empid" : 135,
"empname" : "adithya ram",
"manager" : {
"empid" : 110,
"empname" : "sai chaitanya"
}
}
以上就是何时在java中使用@jsonmanagedreference和@jsonbackreference注解使用jackson？的详细内容。
