字符串的MD5的32位加密和16位加密
import java.security.MessageDigest;
import java.util.Locale;
public class MD5Util {
public static String encode(String content) {
try {
MessageDigest digest = MessageDigest.getInstance("MD5");
digest.update(content.getBytes());
return getEncode16(digest);
//return getEncode32(digest);
} catch (Exception e) {
}
return null;
}
/**
* 32位加密
* @param digest
* @return
*/
private static String getEncode32(MessageDigest digest) {
StringBuilder builder = new StringBuilder();
for (byte b : digest.digest()) {
builder.append(Integer.toHexString((b >> 4) & 0xf));
builder.append(Integer.toHexString(b & 0xf));
}
//return builder.toString().toLowerCase(); // 小写
//return builder.toString().toUpperCase(); // 大写
// java.lang.String.toUpperCase(Locale locale) 方法将在此字符串中的所有字符为大写的规则给定的Locale.
//return builder.toString().toUpperCase(Locale.getDefault()); // 大写
return builder.toString();
}
/**
* 16位加密
* @param digest
* @return
*/
private static String getEncode16(MessageDigest digest) {
StringBuilder builder = new StringBuilder();
for (byte b : digest.digest()) {
builder.append(Integer.toHexString((b >> 4) & 0xf));
builder.append(Integer.toHexString(b & 0xf));
}
// 16位加密,从第9位到25位
//return builder.substring(8, 24).toString().toUpperCase();
return builder.substring(8, 24).toString();
}
}
补充:综合编程 , 其他综合 ,