复制图片

1.复制图片

public void copyFolder(String oldPath, String newPath) {
        
        try {
            File mFile = new File(newPath);
            if(!mFile .exists()){
                (new File(newPath)).mkdirs(); // 如果文件夹不存在 则建立新文件夹
            }
            File a = new File(oldPath);
            String[] file = a.list();
            File temp = null;
            for (int i = 0; i < file.length; i++) {
                if (oldPath.endsWith(File.separator)) {
                    temp = new File(oldPath + file[i]);
                } else {
                    temp = new File(oldPath + File.separator + file[i]);
                }

                if (temp.isFile()) {
                    String fileName = newPath + "/" + (temp.getName()).toString();
                    File testFile = new File(fileName);
                    if (!testFile.exists()) {
                        FileInputStream input = new FileInputStream(temp);
                        FileOutputStream output = new FileOutputStream(fileName);
                        byte[] b = new byte[1024 * 5];
                        int len;
                        while ((len = input.read(b)) != -1) {
                            output.write(b, 0, len);
                        }
                        output.flush();
                        output.close();
                        input.close();
                        num++;
                    }
                }
                if (temp.isDirectory()) {// 如果是子文件夹
                    copyFolder(oldPath + "/" + file[i], newPath + "/" + file[i]);
                }
            }
        } catch (Exception e) {
            System.out.println("复制整个文件夹内容操作出错");
            e.printStackTrace();

        }
    }
    
    private String getTimeString(String time){
        if(time.length()<2){
            return "0" + time;
        }
        else{
            return time;
        }
    }
}

2.将二进制文件转化图片

import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
/**
* 将二进制流转换成图片文件
* @author 晚风工作室 www.soservers.com
*
*/
public class ImgErToFileUtil {
/**
* 将接收的字符串转换成图片保存
* @param imgStr 二进制流转换的字符串
* @param imgPath 图片的保存路径
* @param imgName 图片的名称
* @return
* 1：保存正常
* 0：保存失败
*/
public static int saveToImgByStr(String imgStr,String imgPath,String imgName){
try {
System.out.println("===imgStr.length()====>" + imgStr.length()
+ "=====imgStr=====>" + imgStr);
} catch (Exception e) {
e.printStackTrace();
}
int stateInt = 1;
if(imgStr != null && imgStr.length() > 0){
try {
// 将字符串转换成二进制，用于显示图片
// 将上面生成的图片格式字符串 imgStr，还原成图片显示
byte[] imgByte = hex2byte( imgStr );
InputStream in = new ByteArrayInputStream(imgByte);
File file=new File(imgPath,imgName);//可以是任何图片格式.jpg,.png等
FileOutputStream fos=new FileOutputStream(file);
byte[] b = new byte[1024];
int nRead = 0;
while ((nRead = in.read(b)) != -1) {
fos.write(b, 0, nRead);
}
fos.flush();
fos.close();
in.close();
} catch (Exception e) {
stateInt = 0;
e.printStackTrace();
} finally {
}
}
return stateInt;
}
/**
* 将二进制转换成图片保存
* @param imgStr 二进制流转换的字符串
* @param imgPath 图片的保存路径
* @param imgName 图片的名称
* @return
* 1：保存正常
* 0：保存失败
*/
public static int saveToImgByBytes(File imgFile,String imgPath,String imgName){
int stateInt = 1;
if(imgFile.length() > 0){
try {
File file=new File(imgPath,imgName);//可以是任何图片格式.jpg,.png等
FileOutputStream fos=new FileOutputStream(file);
FileInputStream fis = new FileInputStream(imgFile);
byte[] b = new byte[1024];
int nRead = 0;
while ((nRead = fis.read(b)) != -1) {
fos.write(b, 0, nRead);
}
fos.flush();
fos.close();
fis.close();
} catch (Exception e) {
stateInt = 0;
e.printStackTrace();
} finally {
}
}
return stateInt;
}
/**
* 二进制转字符串
* @param b
* @return
*/
public static String byte2hex(byte[] b) // 二进制转字符串
{
StringBuffer sb = new StringBuffer();
String stmp = "";
for (int n = 0; n < b.length; n++) {
stmp = Integer.toHexString(b[n] & 0XFF);
if (stmp.length() == 1) {
sb.append("0" + stmp);
} else {
sb.append(stmp);
}
}
return sb.toString();
}
/**
* 字符串转二进制
* @param str 要转换的字符串
* @return 转换后的二进制数组
*/
public static byte[] hex2byte(String str) { // 字符串转二进制
if (str == null)
return null;
str = str.trim();
int len = str.length();
if (len == 0 || len % 2 == 1)
return null;
byte[] b = new byte[len / 2];
try {
for (int i = 0; i < str.length(); i += 2) {
b[i / 2] = (byte) Integer
.decode("0X" + str.substring(i, i + 2)).intValue();
}
return b;
} catch (Exception e) {
return null;
}
}
}