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maven:
<dependency>
<groupId>commons-fileupload</groupId>
<artifactId>commons-fileupload</artifactId>
<version>1.3.2</version>
</dependency>
<dependency>
<groupId>commons-io</groupId>
<artifactId>commons-io</artifactId>
<version>2.5</version>
</dependency>
java后端代码:
import java.io.BufferedReader;
import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStreamReader;
import java.util.HashMap;
import java.util.Map;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.web.multipart.MultipartFile;
import net.sf.json.JSONObject;
/**
* 文件上传工具类
*/
public class UploadFileUtil {
private static final Logger log = LoggerFactory.getLogger(UploadFileUtil.class);
/**
* 验证文件是否已经存在
* @param uploadPath
* @param fileName
*/
public static String checkFile(String uploadPath,String fileName) {
Map<String, Object> data = new HashMap<String, Object>();
boolean result = Boolean.TRUE;
try {
String filePath = uploadPath + File.separator + fileName;
File date = new File(filePath);
if (date.exists()) {
data.put("isExists", Boolean.TRUE);
data.put("fileMsg", "文件已存在!是否覆盖!");
} else {
data.put("isExists", Boolean.FALSE);
}
} catch (Exception e) {
log.error(e.getMessage(), e);
result = Boolean.FALSE;
data.put("errorMsg", "文件上传失败!");
}
data.put("success", result);
String jsonStr = JSONObject.fromObject(data).toString();
return jsonStr;
}
/**
* 文件上传
* @param uploadfile
* @param request
* @param uploadPath
* @param fileName
*/
public static String uploadFile(MultipartFile uploadfile, String uploadPath,String fileName) {
Map<String, Object> data = new HashMap<String, Object>();
boolean result = Boolean.TRUE;
String uploadFileName = null;
try {
InputStreamReader read = new InputStreamReader(uploadfile.getInputStream(), "utf-8");
BufferedReader bufferedReader = new BufferedReader(read);
StringBuffer jsonContent = new StringBuffer();
String content = "";
while ((content = bufferedReader.readLine()) != null) {
jsonContent.append(content);
}
String filePath = uploadPath + File.separator + fileName;
File date = new File(filePath);
FileOutputStream fop = null;
fop = new FileOutputStream(date);
byte[] contentInBytes = jsonContent.toString().getBytes();
fop.write(contentInBytes);
fop.flush();
fop.close();
read.close();
} catch (Exception e) {
log.error(e.getMessage(), e);
result = Boolean.FALSE;
data.put("errorMsg", "文件上传失败!");
}
data.put("success", result);
data.put("resultMsg", uploadFileName + "上传成功!");
String jsonStr = JSONObject.fromObject(data).toString();
return jsonStr;
}
}