使用easyExcel读取excel表格,再读取excel表格中的链接地址下载文件到本地。
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>easyexcel</artifactId>
<version>2.1.1</version>
</dependency>
import com.alibaba.excel.annotation.ExcelProperty;
import lombok.Data;
@Data
public class ContractData {
@ExcelProperty("contract_name")
private String contractName;
@ExcelProperty("url")
private String url;
}
import com.alibaba.excel.EasyExcel;
import org.apache.commons.lang3.StringUtils;
import java.io.*;
import java.net.*;
import java.util.List;
public class DownloadFile {
/**
* 从网络Url中下载文件
* @param urlStr
* @param fileName
* @param savePath
* @throws IOException
*/
public static void downLoadByUrl(String urlStr,String fileName,String savePath) throws IOException{
URL url = new URL(urlStr);
HttpURLConnection conn = (HttpURLConnection)url.openConnection();
//设置超时间为3秒
conn.setConnectTimeout(5*1000);
//防止屏蔽程序抓取而返回403错误
conn.setRequestProperty("User-Agent", "Mozilla/4.0 (compatible; MSIE 5.0; Windows NT; DigExt)");
//得到输入流
InputStream inputStream = conn.getInputStream();
//获取自己数组
byte[] getData = readInputStream(inputStream);
//文件保存位置
File saveDir = new File(savePath);
if(!saveDir.exists()){
saveDir.mkdir();
}
File file = new File(saveDir+File.separator+fileName);
FileOutputStream fos = new FileOutputStream(file);
fos.write(getData);
if(fos!=null){
fos.close();
}
if(inputStream!=null){
inputStream.close();
}
System.out.println("info:"+url+" download success");
}
/**
* 从输入流中获取字节数组
* @param inputStream
* @return
* @throws IOException
*/
public static byte[] readInputStream(InputStream inputStream) throws IOException {
byte[] buffer = new byte[1024];
int len = 0;
ByteArrayOutputStream bos = new ByteArrayOutputStream();
while((len = inputStream.read(buffer)) != -1) {
bos.write(buffer, 0, len);
}
bos.close();
return bos.toByteArray();
}
public static void main(String[] args) {
try{
String fileName = "E:/upload/文件名.xls";
// 读取到的数据
List<ContractData> list = EasyExcel.read(fileName)
.head(ContractData.class)
.sheet()
.doReadSync();
for (ContractData data : list) {
// 判空
if (StringUtils.isBlank(data.getUrl())) {
continue;
}
if (StringUtils.isBlank(data.getContractName())) {
continue;
}
String url = data.getUrl();
String name = data.getContractName() + ".pdf";
downLoadByUrl(url, name, "E:/contract");
}
}catch (Exception e) {
e.printStackTrace();
}
}
}
借鉴了其他博主的代码,一时找不到博主地址在哪,请见谅。如有错误之处,请指出,谢谢。