在Java中是否有任何方法可以生成一个字符串的MD5哈希?
当前回答
我有一个类(哈希)在哈希格式转换纯文本:md5或sha1,类似于php函数(md5, sha1):
public class Hash {
/**
*
* @param txt, text in plain format
* @param hashType MD5 OR SHA1
* @return hash in hashType
*/
public static String getHash(String txt, String hashType) {
try {
java.security.MessageDigest md = java.security.MessageDigest.getInstance(hashType);
byte[] array = md.digest(txt.getBytes());
StringBuffer sb = new StringBuffer();
for (int i = 0; i < array.length; ++i) {
sb.append(Integer.toHexString((array[i] & 0xFF) | 0x100).substring(1,3));
}
return sb.toString();
} catch (java.security.NoSuchAlgorithmException e) {
//error action
}
return null;
}
public static String md5(String txt) {
return Hash.getHash(txt, "MD5");
}
public static String sha1(String txt) {
return Hash.getHash(txt, "SHA1");
}
}
使用JUnit和PHP进行测试
PHP脚本:
<?php
echo 'MD5 :' . md5('Hello World') . "\n";
echo 'SHA1:' . sha1('Hello World') . "\n";
输出PHP脚本:
MD5 :b10a8db164e0754105b7a99be72e3fe5
SHA1:0a4d55a8d778e5022fab701977c5d840bbc486d0
使用JUnit进行示例和测试:
public class HashTest {
@Test
public void test() {
String txt = "Hello World";
assertEquals("b10a8db164e0754105b7a99be72e3fe5", Hash.md5(txt));
assertEquals("0a4d55a8d778e5022fab701977c5d840bbc486d0", Hash.sha1(txt));
}
}
GitHub中的代码
https://github.com/fitorec/java-hashes
其他回答
Spring中也有一个DigestUtils类:
http://static.springsource.org/spring/docs/3.0.x/javadoc-api/org/springframework/util/DigestUtils.html
这个类包含md5DigestAsHex()方法来完成这项工作。
import java.security.MessageDigest
val digest = MessageDigest.getInstance("MD5")
//Quick MD5 of text
val text = "MD5 this text!"
val md5hash1 = digest.digest(text.getBytes).map("%02x".format(_)).mkString
//MD5 of text with updates
digest.update("MD5 ".getBytes())
digest.update("this ".getBytes())
digest.update("text!".getBytes())
val md5hash2 = digest.digest().map(0xFF & _).map("%02x".format(_)).mkString
//Output
println(md5hash1 + " should be the same as " + md5hash2)
我有一个类(哈希)在哈希格式转换纯文本:md5或sha1,类似于php函数(md5, sha1):
public class Hash {
/**
*
* @param txt, text in plain format
* @param hashType MD5 OR SHA1
* @return hash in hashType
*/
public static String getHash(String txt, String hashType) {
try {
java.security.MessageDigest md = java.security.MessageDigest.getInstance(hashType);
byte[] array = md.digest(txt.getBytes());
StringBuffer sb = new StringBuffer();
for (int i = 0; i < array.length; ++i) {
sb.append(Integer.toHexString((array[i] & 0xFF) | 0x100).substring(1,3));
}
return sb.toString();
} catch (java.security.NoSuchAlgorithmException e) {
//error action
}
return null;
}
public static String md5(String txt) {
return Hash.getHash(txt, "MD5");
}
public static String sha1(String txt) {
return Hash.getHash(txt, "SHA1");
}
}
使用JUnit和PHP进行测试
PHP脚本:
<?php
echo 'MD5 :' . md5('Hello World') . "\n";
echo 'SHA1:' . sha1('Hello World') . "\n";
输出PHP脚本:
MD5 :b10a8db164e0754105b7a99be72e3fe5
SHA1:0a4d55a8d778e5022fab701977c5d840bbc486d0
使用JUnit进行示例和测试:
public class HashTest {
@Test
public void test() {
String txt = "Hello World";
assertEquals("b10a8db164e0754105b7a99be72e3fe5", Hash.md5(txt));
assertEquals("0a4d55a8d778e5022fab701977c5d840bbc486d0", Hash.sha1(txt));
}
}
GitHub中的代码
https://github.com/fitorec/java-hashes
您可能还想看看apache公用编解码器项目的DigestUtils类,它提供了非常方便的方法来创建MD5或SHA摘要。
你可以试着跟着走。查看详细信息和下载代码:http://jkssweetlife.com/java-hashgenerator-md5-sha-1/
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
public class MD5Example {
public static void main(String[] args) throws Exception {
final String inputString = "Hello MD5";
System.out.println("MD5 hex for '" + inputString + "' :");
System.out.println(getMD5Hex(inputString));
}
public static String getMD5Hex(final String inputString) throws NoSuchAlgorithmException {
MessageDigest md = MessageDigest.getInstance("MD5");
md.update(inputString.getBytes());
byte[] digest = md.digest();
return convertByteToHex(digest);
}
private static String convertByteToHex(byte[] byteData) {
StringBuilder sb = new StringBuilder();
for (int i = 0; i < byteData.length; i++) {
sb.append(Integer.toString((byteData[i] & 0xff) + 0x100, 16).substring(1));
}
return sb.toString();
}
}