獲取get,post請求參數，並驗證是否爲空 工具類

獲取get,post請求參數，並驗證是否爲空工具類

import com.alibaba.fastjson.JSONObject;
import org.apache.commons.lang3.StringUtils;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;

import javax.servlet.http.HttpServletRequest;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;

/**
 * @author xnz
 * @date 2019/10/17 9:55
 */
public class ParamVerify {
    /**
     * 獲取post方式傳入的參數並根據傳入的需驗證的參數進行驗證
     * @param params 需判斷是否爲空的參數
     * @return
     * @throws IOException
     */
    public static Map<String, Object> verifyPostParam(String ... params) throws IOException {
        ServletRequestAttributes requestAttributes = (ServletRequestAttributes) RequestContextHolder.currentRequestAttributes();
        HttpServletRequest request = requestAttributes.getRequest();
        StringBuilder sb = new StringBuilder();
        BufferedReader br = new BufferedReader(new InputStreamReader(request.getInputStream(), "UTF-8"));
        String line;
        while ((line = br.readLine()) != null) {
            sb.append(line);
        }
        //轉換爲map
        JSONObject paramsMap = JSONObject.parseObject(sb.toString());
        // 驗證參數不爲空
        if(paramsMap != null) {
            for (String param : params) {
                String paramValue = (String) paramsMap.get(param);
                if (StringUtils.isBlank(paramValue)) {
                    //需判斷的參數爲空，拋出異常
                    throw new RuntimeException("請求參數錯誤! " + param + " 不能爲空!");
                }
            }
        }else{
            throw new RuntimeException("請求參數錯誤!");
        }
        return paramsMap;
    }

    /**
     * 將request.getParameterMap()方式獲取的參數整理並根據傳入的需驗證的參數進行驗證
     * @param parameterMap 需整理的參數集合
     * @param params 需判斷是否爲空的參數
     * @return
     */
    public static Map<String,String> verifyGetParam(Map<String, String[]> parameterMap,String ... params){
        Map<String,String> paramsMap = new HashMap<String, String>();
        if(parameterMap.isEmpty()){
            throw new RuntimeException("請求參數錯誤!");
        }
        Set<String> keys = parameterMap.keySet();
        for (String param : keys) {
            String[] values = parameterMap.get(param);
            paramsMap.put(param,values[values.length-1]);
        }
        for (String param : params) {
            String paramValue = paramsMap.get(param);
            if(StringUtils.isBlank(paramValue)){
                //需判斷的參數爲空，拋出異常
                throw new RuntimeException("請求參數錯誤! " + param + " 不能爲空!");
            }
        }
        return paramsMap;
    }
}