一、概述
解析本地json文件,并导出内容返回给前端
二、代码
@ApiOperation("导入json文件")
@PostMapping("/import")
@DisableEncryptResponse
public R<String> imports(@RequestParam("file") MultipartFile file) {
File files = null;
try {
files = MultipartFileToFile.multipartFileToFile(file);
} catch (Exception e) {
e.printStackTrace();
}
String jsonStr = "";
try {
FileReader fileReader = new FileReader(files);
Reader reader = new InputStreamReader(new FileInputStream(files), "utf-8");
int ch = 0;
StringBuffer sb = new StringBuffer();
while ((ch = reader.read()) != -1) {
sb.append((char) ch);
}
fileReader.close();
reader.close();
jsonStr = sb.toString();
// System.out.println(jsonStr);
// Pattern p = Pattern.compile("\\s*|\t|\r|\n");
// Matcher m = p.matcher(jsonStr);
// jsonStr = m.replaceAll("");
// System.out.println(jsonStr);
return R.ok(jsonStr);
} catch (IOException e) {
e.printStackTrace();
return null;
}
}
package com.dbm.flowconfig.util; /**
* Created by TongGuoBo on 2019/6/19.
*/
import org.springframework.web.multipart.MultipartFile;
import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
/**
* @ClassName MultipartFileToFile
* @Description MultipartFile转fie
* @Author zhangyj
* @Date 2023
**/
public class MultipartFileToFile {
/**
* MultipartFile 转 File
*
* @param file
* @throws Exception
*/
public static File multipartFileToFile(MultipartFile file) throws Exception {
File toFile = null;
if (file.equals("") || file.getSize() <= 0) {
file = null;
} else {
InputStream ins = null;
ins = file.getInputStream();
toFile = new File(file.getOriginalFilename());
inputStreamToFile(ins, toFile);
ins.close();
}
return toFile;
}
//获取流文件
private static void inputStreamToFile(InputStream ins, File file) {
try {
OutputStream os = new FileOutputStream(file);
int bytesRead = 0;
byte[] buffer = new byte[8192];
while ((bytesRead = ins.read(buffer, 0, 8192)) != -1) {
os.write(buffer, 0, bytesRead);
}
os.close();
ins.close();
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* 删除本地临时文件
* @param file
*/
public static void delteTempFile(File file) {
if (file != null) {
File del = new File(file.toURI());
del.delete();
}
}
}
三、使用postman测试