import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStream;
import sun.misc.BASE64Decoder;
public class FileStrUtil {
/**
* summary:将字符串存储为文件 采用Base64解码
*
* @param fileStr
* @param outfile
*
*/
public static void streamSaveAsFile(InputStream is, String outFileStr) {
FileOutputStream fos =
null;
try {
File file =
new File(outFileStr);
BASE64Decoder decoder =
new BASE64Decoder();
fos =
new FileOutputStream(file);
byte[] buffer = decoder.decodeBuffer(is);
fos.write(buffer,
0, buffer.length);
}
catch (Exception e) {
e.printStackTrace();
throw new RuntimeException(e);
}
finally {
try {
is.close();
fos.close();
}
catch (Exception e2) {
e2.printStackTrace();
throw new RuntimeException(e2);
}
}
}
/**
*
*
* summary:将字符串存储为文件
*
* @param fileStr
* @param outfile
*
*/
public static void stringSaveAsFile(String fileStr, String outFilePath) {
InputStream out =
new ByteArrayInputStream(fileStr.getBytes());
FileStrUtil.streamSaveAsFile(out, outFilePath);
}
/**
* 将流转换成字符串 使用Base64加密
*
* @param in输入流
* @return
* @throws IOException
*/
public static String streamToString(InputStream inputStream) throws IOException {
byte[] bt = toByteArray(inputStream);
inputStream.close();
String out =
new sun.misc.BASE64Encoder().encodeBuffer(bt);
return out;
}
/**
* 将流转换成字符串
*
* @param in输入流
* @return
* @throws IOException
*/
public static String fileToString(String filePath) throws IOException {
File file =
new File(filePath);
FileInputStream is =
new FileInputStream(file);
String fileStr = FileStrUtil.streamToString(is);
return fileStr;
}
/**
*
* summary:将流转化为字节数组
*
* @param inputStream
* @return
* @throws IOException
*
*/
public static byte[] toByteArray(InputStream inputStream) throws IOException {
ByteArrayOutputStream out =
new ByteArrayOutputStream();
byte[] buffer = new byte[1024 * 4];
byte[] result = null;
try {
int n = 0;
while ((n = inputStream.read(buffer)) != -1) {
out.write(buffer,
0, n);
}
result = out.toByteArray();
}
catch (Exception e) {
e.printStackTrace();
throw new RuntimeException(e);
}
finally {
out.close();
}
return result;
}
public static void main(String[] args) throws Exception {
String fromPath =
"F://fileupload//aaa.docx";
String toPath =
"C://Users//Desktop//aaaa.docx";
String fileStr = FileStrUtil.fileToString(fromPath);
FileStrUtil.stringSaveAsFile(fileStr, toPath);
}
}