用fastjson对一个类进行序列化时，在没有类的实例只有类的Class的情况下,如果想知道这个Class有所有可以被序列化的字段名，可以用com.alibaba.fastjson.util.TypeUtils.computeGetters(Class<?> clazz,Map<String,String> aliasMap)方法来实现,实现代码很简单：

package net.gdface.facelog.message;

import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import org.junit.Test;

import com.alibaba.fastjson.util.FieldInfo;

public class TestFastjson {
    @Test
    public void testComputeGetters(){
        // 返回 Group 类所有可序列化字段信息
        List<FieldInfo> fieldInfo = com.alibaba.fastjson.util.TypeUtils.computeGetters(Group.class,null);
        // 输出字段名和类型
        for(FieldInfo field:fieldInfo){
            System.out.printf("name %s %s\n",field.name,field.fieldType.toString());
        }
    }
    public interface Person<T>{

    }
    public static class User implements Person<String>{

        private Long   id;
        private String name;


        public Long getId() {
            return id;
        }

        public void setId(Long id) {
            this.id = id;
        }

        public String getName() {
            return name;
        }

        public void setName(String name) {
            this.name = name;
        }

    }
    public static  class Group {

        private Long       id;
        private String     name;
        private List<User> users = new ArrayList<User>();
        public Date date=new Date();
        public java.sql.Date sqldate=new java.sql.Date(date.getTime());
        public byte[] array=new byte[]{22,33,3,2,1,5,-1};
        public String nullStr=null;
        private String privString="private string";
        public Long getId() {
            return id;
        }

        public void setId(Long id) {
            this.id = id;
        }

        public String getName() {
            return name;
        }

        public void setName(String name) {
            this.name = name;
        }

        public List<User> getUsers() {
            return users;
        }

        public void setUsers(List<User> users) {
            this.users = users;
        }

            public void addUser(User user) {
                users.add(user);
            }
    }

}

测试代码运行输出

name array class [B name date class java.util.Date name id class java.lang.Long name name class java.lang.String name nullStr class java.lang.String name sqldate class java.sql.Date name users java.util.List