Java实现文件批量下载，打包成zip压缩包
import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.OutputStream;
import java.net.URLEncoder;
import java.util.List;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;
import com.fasterxml.jackson.core.type.TypeReference;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
/**
* @author XXX
* @version 1.0
* @date 2021年10月15日
*/
public class Test {
/**
* 日志输出对象
*/
private static Logger logger = LoggerFactory.getLogger(Test.class);
/**
* 文件路径 举例：D:\data\test\file\
*/
@Value("${path}")
private String path;
/**
* 文件下载
*
* @param param
* @return
*/
@RequestMapping(value = "/test/", method = RequestMethod.POST)
@ResponseBody
public void downloadFile(@RequestBody String param,HttpServletRequest request, HttpServletResponse response) {
OutputStream os = null;
ZipOutputStream zos = null;
BufferedInputStream bis = null;
FileInputStream in = null;
try {
ObjectMapper objectMapper = new ObjectMapper();
JsonNode root = objectMapper.readTree(param);
if (root != null) {
JsonNode dataNode = root.findValue("fileNameList");
List<String> fileNameList = objectMapper.readValue(dataNode.toString(), new TypeReference<List<String>>(){});
// 通过response对象获取OutputStream流
os = response.getOutputStream();
// 获取zip的输出流
zos = new ZipOutputStream(os);
// 遍历文件名列表添加进压缩包
for (int i = 0; i < fileNameList.size(); i++) {
String fileName = fileNameList.get(i);
String filePath = path + fileName;
File file = new File(filePath);
if (file.exists()) {
// 读取文件流
in = new FileInputStream(file);
// 创建ZIP实体，并添加进压缩包
ZipEntry zipEntry = new ZipEntry(fileName);
zos.putNextEntry(zipEntry);
// 设置压缩后的文件名
String zipFileName = "";
// 设置Content-Disposition响应头，控制浏览器弹出保存框，若没有此句浏览器会直接打开并显示文件
// 中文名要进行编码，否则客户端能下载但名字会乱码
response.setHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode(zipFileName, "UTF-8"));
// 输入缓冲流
bis = new BufferedInputStream(in, 1024 * 10);
// 创建读写缓冲区
byte[] buf = new byte[1024 * 10];
int len = 0;
while ((len = bis.read(buf, 0, 1024 * 10)) > 0) {
// 使用OutputStream将缓冲区的数据输出到客户端浏览器
zos.write(buf, 0, len);
}
bis.close();
in.close();
zos.closeEntry();
}
}
}
} catch (Exception e) {
logger.error("下载文件异常:" + e.toString());
} finally {
try {
if(null != bis){
bis.close();
}
if(null != in){
in.close();
}
if(null != zos){
zos.close();
}
if(null != os){
os.close();
}
} catch (Exception e2) {
logger.error(e2.toString());
}
}
}
}