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io.github.stylesmile.tool.FileUploadUtil Maven / Gradle / Ivy
package io.github.stylesmile.tool;
import com.sun.net.httpserver.HttpExchange;
import java.io.*;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
public class FileUploadUtil {
private FileUploadUtil() {
}
public static class RequestFileItem {
public String fileName;
public String boundary;
public String countentType;
}
public static class RequestBody {
public static String boundary;
public static List> formItems = new ArrayList<>();
public static List> fileItems = new ArrayList<>();
}
private static RequestFileItem info;
public static void fileUpload(HttpExchange he, String path) {
path = StringUtil.isEmpty(path) ? "c://temp//" : path;
OutputStream os = null;
try {
InputStream is = he.getRequestBody();
BufferedInputStream bis = new BufferedInputStream(is);
byte[] buffer = new byte[1024];//前三行一定小于1024个byte
int length = 0;
File file;
boolean isStart = true;
while ((length = bis.read(buffer)) != -1) {
//判断是不是文件的分隔符,不是的话,读到临时文件中
//正常写入
if (isStart) {
int startReadIndex = getFileReadIndex(buffer);
isStart = false;
if (info != null && info.fileName != null) {
file = new File(path + info.fileName);
if (!file.getParentFile().exists()) {
file.createNewFile();
}
if (!file.exists()) {
file.createNewFile();
}
os = new FileOutputStream(file);
byte[] realData = cartByte(buffer, startReadIndex, buffer.length - startReadIndex);
// if (new String(realData).contains("-")) {
// //文件非常小,第一个1024字节就包含了文件
// realData = cartByte(realData, 0, getIndexOf(realData, "-".getBytes()) - "\r\n-".getBytes().length);
// os.write(realData);
// os.close();
// break;
// }
os.write(buffer, startReadIndex, buffer.length - startReadIndex);
continue;
}
}
if (os == null) {
break;
}
//如果包含结束符,则只读结束符以前的数据
if (!new String(buffer).contains(info.boundary)) {
os.write(buffer, 0, length);
} else {
//结束符前有个换行符,所以减2
buffer = cartByte(buffer, 0, GetIndexOf(buffer, (info.boundary).getBytes()) - 2);
os.write(buffer, 0, buffer.length - 1);
os.close();
break;
}
}
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
os.close();
} catch (Exception e) {
}
}
}
private static int getFileReadIndex(byte[] buffer) {
//读四个\n符号就检查是不是文件
try {
for (int i = 0; i < buffer.length; i++) {
int startIndex = getLineIndex(buffer, 4 * i);
int endIndex = getLineIndex(buffer, 4 * (i + 1));
byte[] fourLines = cartByte(buffer, startIndex, endIndex);
if (isFileBoundary(fourLines)) {
return endIndex;
}
}
} catch (Exception e) {
System.out.println("出现异常:" + e.getMessage());
}
return 0;
}
private static boolean isFileBoundary(byte[] buffer) {
String fileItem = new String(buffer);
if (fileItem.contains("filename")) {
if (info == null) {
info = new RequestFileItem();
}
info.boundary = fileItem.substring(0, fileItem.indexOf("\n") - 1);
fileItem = fileItem.substring(fileItem.indexOf("\n") + 1, fileItem.length());
info.fileName = fileItem.substring(fileItem.indexOf("filename=\"") + "filename=\"".length(), fileItem.indexOf("\n") - "\"\n".length());
info.countentType = fileItem.substring(fileItem.indexOf("Content-Type:"), fileItem.length());
return true;
}
return false;
}
public static int getLineIndex(byte[] source, int lineNumber) {
if (lineNumber <= 0) {
return 0;
}
int lineCount = 0;
for (int k = 0; k < source.length; k++) {
if (lineCount == lineNumber) {
return k;
}
if (source[k] == "\n".getBytes()[0] && lineCount <= lineNumber) {
lineCount++;
}
}
return 0;
}
/**
* 获取byte[]指定起始位置的数组
*
* @param source 源
* @param beginIndex 开始
* @param endIndex 结束
* @return byte
*/
public static byte[] cartByte(byte[] source, int beginIndex, int endIndex) {
if (source == null || source.length <= 0 || endIndex - beginIndex <= 0) {
return null;
}
int byteLength = (endIndex + 1) - beginIndex;
byte[] temp = new byte[byteLength];
for (int i = 0; i < byteLength; i++) {
temp[i] = source[i + beginIndex];
}
return temp;
}
/**
* 获取某串byte数组在原byte数组的位置
*
* @param source 原byte数组
* @param part 某串byte数组
* @return -1 未找到 其他大于等于0的值
*/
public static int getIndexOf(byte[] source, byte[] part) {
if (source == null || part == null || source.length == 0 || part.length == 0) {
return -1;
}
int i, j;
for (i = 0; i < source.length; i++) {
if (source[i] == part[0]) {
for (j = 0; j < part.length; j++) {
if (source[i + j] != part[j]) {
break;
}
}
if (j == part.length) {
return i;
}
}
}
return -1;
}
/**
* 获取某串byte数组在原byte数组的位置
*
* @param source 原byte数组
* @param part 某串byte数组
* @return -1 未找到 其他大于等于0的值
*/
public static int GetIndexOf(byte[] source, byte[] part) {
if (source == null || part == null || source.length == 0 || part.length == 0) {
return -1;
}
int i, j;
for (i = 0; i < source.length; i++) {
if (source[i] == part[0]) {
for (j = 1; j < part.length; j++) {
if (source[i + j] != part[j]) {
break;
}
}
if (j == part.length) {
return i;
}
}
}
return -1;
}
public static void compressedFiles_Gzip(String folderPath, String targzipFilePath, String targzipFileName) {
File file = new File(folderPath);
if (!file.exists() || !file.isDirectory() || file.listFiles().length <= 0) {
return;
}
File[] childFiles = file.listFiles();
try {
//建立文件输出流
OutputStream os = new FileOutputStream(targzipFilePath);
//建立tar 压缩输出流
//TarOutputStream tos = new TarOutputStream(os);
for (int i = 0; i < childFiles.length; i++) {
}
} catch (Exception e) {
}
}
}
