JAVA 判斷對象內容是否含有空值

簡單判斷對象是否含有NULL值，以及信息描述。


package com.sicdt.sicsign.bill.api.util;

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

import com.alibaba.fastjson.JSONObject;
import com.sicdt.sicsign.bill.api.model.CheckResultModel;

public class CheckResultMsg {
    private boolean isSuccess;
    private String massgage;
    private List<CheckResultModel> successes = new ArrayList<>();//驗證通過
    private List<CheckResultModel> fails = new ArrayList<>();//驗證失敗
    
    public CheckResultMsg() {
        super();
        // TODO Auto-generated constructor stub
    }
    
    
    /**
     * <br>描 述: 校驗入參對象，是否含有空值
     * <br>作 者: shizhenwei 
     * <br>歷 史: (版本) 作者 時間 注釋
     * @param obj
     * @return
     * @throws IllegalAccessException
     * @throws IllegalArgumentException
     * @throws InvocationTargetException
     */
    public static CheckResultMsg checkObject(Object obj){
        CheckResultMsg resultMsg = new CheckResultMsg();
        if(null==obj){
            resultMsg.setSuccess(true);
            resultMsg.setMassgage("入參對象為NULL");
            return resultMsg;
        }
        resultMsg.setSuccess(true);
        List<CheckResultModel> successes = resultMsg.getSuccesses();
        List<CheckResultModel> fails = resultMsg.getSuccesses();
        Class<?> clazz = obj.getClass();
        Method[] methods = clazz.getDeclaredMethods();
        JSONObject jsonMsg = new JSONObject();
        for(Method method : methods){
            String methodName = method.getName();
            if(methodName.startsWith("get")){
                Object res = null;
                try {
                    res = method.invoke(obj);
                } catch (IllegalAccessException | IllegalArgumentException | InvocationTargetException e) {
                    e.printStackTrace();
                    resultMsg.setSuccess(false);
                    return resultMsg;
                }
                if(null==res){
                    String fieldName = methodName.substring(3);
                    String fieldMsg = "不允許為NULL";
                    jsonMsg.put(fieldName, fieldMsg);
                    CheckResultModel model = new CheckResultModel(fieldName, fieldMsg, false);
                    fails.add(model);
                    if(resultMsg.isSuccess()){
                        resultMsg.setSuccess(false);
                    }
                }else{
                    CheckResultModel model = new CheckResultModel(methodName.substring(3), "正確", true);
                    successes.add(model);
                }
            }
        }
        resultMsg.setMassgage(jsonMsg.toJSONString());
        return resultMsg;
    }
    
    /**
     * <br>描 述: 校驗入參對象，指定屬性，是否含有空值
     * <br>作 者: shizhenwei 
     * <br>歷 史: (版本) 作者 時間 注釋
     * @param obj
     * @return
     * @throws IllegalAccessException
     * @throws IllegalArgumentException
     * @throws InvocationTargetException
     */
    public static CheckResultMsg checkObject(Object obj, String[] fileds, boolean isCheckFileds){
        CheckResultMsg resultMsg = new CheckResultMsg();
        if(null==obj){
            resultMsg.setSuccess(true);
            resultMsg.setMassgage("入參對象為NULL");
            return resultMsg;
        }
        resultMsg.setSuccess(true);
        List<CheckResultModel> successes = resultMsg.getSuccesses();
        List<CheckResultModel> fails = resultMsg.getSuccesses();
        Class<?> clazz = obj.getClass();
        Method[] methods = clazz.getDeclaredMethods();
        JSONObject jsonMsg = new JSONObject();
        for(Method method : methods){
            String methodName = method.getName();
            String fieldName = methodName.substring(3);
            List<String> filedList = Arrays.asList(fileds);
            if(filedList.contains(fieldName) == isCheckFileds){
                if(methodName.startsWith("get")){
                    Object res = null;
                    try {
                        res = method.invoke(obj);
                    } catch (IllegalAccessException | IllegalArgumentException | InvocationTargetException e) {
                        e.printStackTrace();
                        resultMsg.setSuccess(false);
                        return resultMsg;
                    }
                    if(null==res){
                        String fieldMsg = "不允許為NULL";
                        jsonMsg.put(fieldName, fieldMsg);
                        CheckResultModel model = new CheckResultModel(fieldName, fieldMsg, false);
                        fails.add(model);
                        if(resultMsg.isSuccess()){
                            resultMsg.setSuccess(false);
                        }
                    }else{
                        CheckResultModel model = new CheckResultModel(methodName.substring(3), "正確", true);
                        successes.add(model);
                    }
                }
            }else{
                continue;
            }
            
        }
        resultMsg.setMassgage(jsonMsg.toJSONString());
        return resultMsg;
    }
    
    public String description(){
        String message = "";
        if(this.isSuccess){
            message += "參數檢查正確：";
            
        }else{
            message += "參數檢查錯誤：";
        }
        return message+this.massgage;
    }
    
    
    public boolean isSuccess() {
        return isSuccess;
    }

    public void setSuccess(boolean isSuccess) {
        this.isSuccess = isSuccess;
    }

    public String getMassgage() {
        return massgage;
    }

    public void setMassgage(String massgage) {
        this.massgage = massgage;
    }

    public List<CheckResultModel> getSuccesses() {
        return successes;
    }
    public void setSuccesses(List<CheckResultModel> successes) {
        this.successes = successes;
    }
    public List<CheckResultModel> getFails() {
        return fails;
    }
    public void setFails(List<CheckResultModel> fails) {
        this.fails = fails;
    }
}