the jackson @jsoninclude注解可以在特定条件下用于排除类的属性或字段，并可以使用jsoninclude.include枚举进行定义。 jsoninclude.include枚举包含一些常量，如always，non_default，non_empty和non_null，用于确定是否排除属性（字段）。
语法public static enum jsoninclude.include extends enum<jsoninclude.include>
exampleimport com.fasterxml.jackson.annotation.*;import com.fasterxml.jackson.databind.*;import java.io.*;public class jsonincludetest { public static void main(string args[]) throws ioexception { objectmapper objectmapper = new objectmapper(); employee emp = new employee(); string jsonstring = objectmapper.writerwithdefaultprettyprinter().writevalueasstring(emp); system.out.println(jsonstring); }}// employee class@jsoninclude(jsoninclude.include.non_empty)class employee { public int empid = 115; public string empname = null; @override public string tostring() { return "employee{" + "empid=" + empid + ", empname='" + empname + '\'' + '}'; }}
输出{ "empid" : 115}
以上就是在java中，jackson @jsoninclude注解的重要性是什么？的详细内容。