贴几个最近用到的工具类
1,获取如片的MD5和HASH值
package com.Tools; import java.io.FileInputStream; import java.io.InputStream; import java.security.MessageDigest; import com.sqlite.Dao.NcpConsumeDAO; import com.sqlite.Model.Ncp_Consume; public class MD5_SHA_Util { private final static String MD51 = "MD5"; // 产生哈希值 String hashType = "MD5"; public static char[] hexChar = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f' }; // 直接给出MD5的16位二进制码 // public static byte[] getMD5byte(String fileName, String hashType)throws // Exception { public byte[] getMD5byte(String fileName) throws Exception { InputStream fis; fis = new FileInputStream(fileName); byte[] buffer = new byte[1024]; MessageDigest md5 = MessageDigest.getInstance("MD5"); int numRead = 0; while ((numRead = fis.read(buffer)) > 0) { md5.update(buffer, 0, numRead); } fis.close(); byte b[] = md5.digest(); System.out.println("byte b[]" + b); return b; } // 直接给出hash的16位二进制码 // public static byte[] getHASHByte(String fileName, String hashType)throws // Exception { public byte[] getHASHByte(String fileName) throws Exception { InputStream fis; fis = new FileInputStream(fileName); byte[] buffer = new byte[1024]; MessageDigest md5 = MessageDigest.getInstance("SHA1"); int numRead = 0; while ((numRead = fis.read(buffer)) > 0) { md5.update(buffer, 0, numRead); } fis.close(); byte b[] = md5.digest(); return b; } public static String getHash(String fileName, String hashType) throws Exception { InputStream fis; fis = new FileInputStream(fileName); byte[] buffer = new byte[1024]; MessageDigest md5 = MessageDigest.getInstance(hashType); int numRead = 0; while ((numRead = fis.read(buffer)) > 0) { md5.update(buffer, 0, numRead); } fis.close(); byte b[] = md5.digest(); return toHexString(md5.digest()); } public static String getByteHash(byte[] bytearray, String hashType) throws Exception { byte[] fis = bytearray; byte[] buffer = new byte[1024]; MessageDigest md5 = MessageDigest.getInstance(hashType); int numRead = 0; while ((numRead = fis.length) > 0) { md5.update(buffer, 0, numRead); } return toHexString(md5.digest()); } public static String toHexString(byte[] b) { StringBuilder sb = new StringBuilder(b.length * 2); for (int i = 0; i < b.length; i++) { sb.append(hexChar[(b[i] & 0xf0) >>> 4]); sb.append(hexChar[b[i] & 0x0f]); } return sb.toString(); }
2,获取图片的二进制码
package com.Tools; //输入流 import java.io.BufferedOutputStream; import java.io.ByteArrayOutputStream; import java.io.File; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import android.R.integer; public class FingerImage_Convert { public int len; public integer date_len; @SuppressWarnings("finally") public byte[] getRimg(String From_Url) throws IOException { new File(From_Url).createNewFile(); FileInputStream in = new FileInputStream(From_Url); byte[] bytes; ByteArrayOutputStream baos = new ByteArrayOutputStream(); try { byte[] b = new byte[2048]; while ((len = in.read(b, 0, 2048)) != -1) { baos.write(b, 0, len); } baos.flush(); // new File(From_Url).createNewFile(); // FileInputStream in = new FileInputStream(From_Url); // // BufferedInputStream bis = new BufferedInputStream(in); // // while((i=in.read())!=-1){ // // builder.append((char)i); // // } // // bis.close(); } catch (FileNotFoundException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } finally { bytes = baos.toByteArray(); System.out.print("return bytes>>>>>>>>>>>>" + bytes); return bytes; } } // 输出流 public int getLen(String From_Url) { return len; } public void setLen(int len) { this.len = len; } public void getWimg(String content, String to_Url) { try { new File(to_Url).createNewFile(); FileOutputStream out = new FileOutputStream(to_Url); BufferedOutputStream bos = new BufferedOutputStream(out); char[] ch = content.toCharArray(); // System.out.println(ch); for (int i = 0; i < ch.length; i++) { bos.write(ch[i]); } bos.flush(); bos.close(); } catch (IOException e) { e.printStackTrace(); } } }
3，获取网络时间并转化成年月日时分秒的纯数字字符串例如：20121212121212（2012年12月12日12时12分12秒）
import java.text.SimpleDateFormat; import java.util.Date; public class JavaTime { public String GetTime() { SimpleDateFormat formatter = new SimpleDateFormat( "yyyy年MM月dd日 HH:mm:ss "); Date curDate = new Date(System.currentTimeMillis());// 获取当前时间 String str = formatter.format(curDate); String year = str.substring(2, 4); String month = str.substring(5, 7); String data = str.substring(8, 10); String Hour = str.substring(12, 14); String minute = str.substring(15, 17); String Second = str.substring(18, 20); String numsString = year + month + data + Hour + minute + Second; return numsString; } }
4，SD卡操作的相关类
package com.Tools; import java.io.File; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import android.os.Environment; public class FileUtils { private String SDPATH; public String getSDPATH() { return SDPATH; } public FileUtils() { //得到当前外部存储设备的目录 // /SDCARD SDPATH = Environment.getExternalStorageDirectory() + "/"+"download"; } /** * 在SD卡上创建文件 * * @throws IOException */ public File creatSDFile(String fileName) throws IOException { File file = new File(SDPATH + "version"); file.createNewFile(); return file; } /** * 在SD卡上创建目录 * * @param dirName */ public File creatSDDir(String dirName) { File dir = new File(SDPATH + dirName); dir.mkdirs(); return dir; } /** * 判断SD卡上的文件夹是否存在 */ public boolean isFileExist(String fileName){ File file = new File(SDPATH + fileName); return file.exists(); } /** * 将一个InputStream里面的数据写入到SD卡中 */ public File write2SDFromInput(String path,String fileName,InputStream input){ File file = null; OutputStream output = null; try{ creatSDDir(path); file = creatSDFile(path + fileName); output = new FileOutputStream(file); byte buffer [] = new byte[4 * 1024]; while((input.read(buffer)) != -1){ output.write(buffer); } output.flush(); } catch(Exception e){ e.printStackTrace(); } finally{ try{ output.close(); } catch(Exception e){ e.printStackTrace(); } } return file; } }
