@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<managedreferencebeantest> list; public backreferencebeantest(int empid, string empname) { this.empid = empid; this.empname = empname; list = new arraylist<managedreferencebeantest>(); } 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。