用java写一个md5加密demo
时间: 2024-01-01 08:06:17 浏览: 43
好的,以下是用Java实现MD5加密的示例代码:
```java
import java.math.BigInteger;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
public class MD5Demo {
public static void main(String[] args) {
String originalStr = "hello world"; // 要加密的字符串
try {
MessageDigest md = MessageDigest.getInstance("MD5");
md.update(originalStr.getBytes());
byte[] digest = md.digest();
BigInteger bigInt = new BigInteger(1, digest);
String md5Str = bigInt.toString(16);
while (md5Str.length() < 32) {
md5Str = "0" + md5Str;
}
System.out.println("MD5加密后的字符串为:" + md5Str);
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
}
}
}
```
运行结果为:
```
MD5加密后的字符串为:5eb63bbbe01eeed093cb22bb8f5acdc3
```
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