直接上代码：

package common;

import com.alibaba.fastjson.JSON;

import java.io.Serializable;

/**
 *  建造者模式：通用服务端返回报文设计
 */
public class ServerResult implements Serializable {

    public static final String STATUS_SUCCESS = "200";
    private String code;
    private String msg;
    private Object result;

    public ServerResult(String code, String msg, Object result){
        this.code = code;
        this.msg = msg;
        this.result = result;
    }
    public String getCode() {
        return code;
    }

    public void setCode(String code) {
        this.code = code;
    }

    public String getMsg() {
        return msg;
    }

    public void setMsg(String msg) {
        this.msg = msg;
    }

    public Object getResult() {
        return result;
    }

    public void setResult(Object result) {
        this.result = result;
    }
    public static ServerResult error(String code, String msg) {
        return getBuilder().setCode(code).setMsg(msg).build();
    }

    public static ServerResult error(String code, String msg, Object object) {
        return getBuilder().setCode(code).setMsg(msg).setResult(object).build();
    }

    public static ServerResult ok(String msg) {
        return getBuilder().setCode(STATUS_SUCCESS).setMsg(msg).build();
    }

    public static ServerResult ok(Object result) {
        return getBuilder().setCode(STATUS_SUCCESS).setResult(result).build();
    }

    public static ServerResult ok(String msg, Object result){
        return getBuilder().setCode(STATUS_SUCCESS).setMsg(msg).setResult(result).build();
    }

    public static ServerResult ok() {
        return getBuilder().setCode(STATUS_SUCCESS).setMsg("").build();
    }

    public static Builder getBuilder(){
        return new Builder();
    }

    public static class Builder {
        private String code;
        private String msg;
        private Object result;

        public Builder setCode(String code) {
            this.code = code;
            return this;
        }

        public Builder setMsg(String msg) {
            this.msg = msg;
            return this;
        }


        public Builder setResult(Object result) {
            this.result = result;
            return this;
        }

        public ServerResult build(){
            System.out.println(code);
            return new ServerResult(code, msg, result);
        }
    }

    /**
     *  使用示例
     * @param args
     */
    public static void main(String[] args) {

        System.out.println(JSON.toJSONString(ServerResult.ok()));
        System.out.println(JSON.toJSONString(ServerResult.error("10001","xx")));

    }


}