Java实现文件上传-httpclient

引入依赖库

        
            org.apache.httpcomponents
            httpcore
            4.4.9
        
        
            org.apache.httpcomponents
            httpclient
            4.5.13
        
        
            org.apache.httpcomponents
            httpmime
            4.5.12
        

针对httpClient进行文件上传业务的封装

package com.test.file.utils;

import java.io.File;
import java.io.IOException;
import java.nio.charset.StandardCharsets;
import java.util.*;
import java.util.c