浅析Java 常用的 4 种加密方式（MD5+Base64+SHA+BCrypt）
一、工具类
md5加密工具类
publicclassMD5Utils{
privatestaticfinalStringhexDigIts[]={"0","1","2","3","4","5","6","7","8","9","a","b","c","d","e","f"};
/**
*MD5加密
*@paramorigin字符
*@paramcharsetname编码
*@return
*/
publicstaticStringMD5Encode(Stringorigin,Stringcharsetname){
StringresultString=null;
try{
resultString=newString(origin);
MessageDigestmd=MessageDigest.getInstance("MD5");
if(null==charsetname||"".equals(charsetname)){
resultString=byteArrayToHexString(md.digest(resultString.getBytes()));
}else{
resultString=byteArrayToHexString(md.digest(resultString.getBytes(charsetname)));
}
}catch(Exceptione){
}
returnresultString;
}
publicstaticStringbyteArrayToHexString(byteb[]){
StringBufferresultSb=newStringBuffer();
for(inti=0;i
base64加密工具类
publicclassBase64Util{
//字符串编码
privatestaticfinalStringUTF_8="UTF-8";
/**
*加密字符串
*@paraminputData
*@return
*/
publicstaticStringdecodeData(StringinputData){
try{
if(null==inputData){
returnnull;
}
returnnewString(Base64.decodeBase64(inputData.getBytes(UTF_8)),UTF_8);
}catch(UnsupportedEncodingExceptione){
}
returnnull;
}
/**
*解密加密后的字符串
*@paraminputData
*@return
*/
publicstaticStringencodeData(StringinputData){
try{
if(null==inputData){
returnnull;
}
returnnewString(Base64.encodeBase64(inputData.getBytes(UTF_8)),UTF_8);
}catch(UnsupportedEncodingExceptione){
}
returnnull;
}
publicstaticvoidmain(String[]args){
System.out.println(Base64Util.encodeData("我是中文"));
StringenStr=Base64Util.encodeData("我是中文");
System.out.println(Base64Util.decodeData(enStr));
}
}
Bcrypt工具类
publicclassBcryptCipher{
//generatesaltseed
privatestaticfinalintSALT_SEED=12;
//theheadfosalt
privatestaticfinalStringSALT_STARTSWITH="$2a$12";
publicstaticfinalStringSALT_KEY="salt";
publicstaticfinalStringCIPHER_KEY="cipher";
/**
*Bcryptencryptionalgorithmmethod
*@paramencryptSource
*needtoencryptthestring
*@returnMap,twovaluesinMap,saltandcipher
*/
publicstaticMapBcrypt(finalStringencryptSource){
Stringsalt=BCrypt.gensalt(SALT_SEED);
MapbcryptResult=Bcrypt(salt,encryptSource);
returnbcryptResult;
}
/**
*
*@paramsaltencryptsalt,Mustconformtotherules
*@paramencryptSource
*@return
*/
publicstaticMapBcrypt(finalStringsalt,finalStringencryptSource){
if(StringUtils.isBlank(encryptSource)){
thrownewRuntimeException("Bcryptencryptinputparamscannotbeempty");
}
if(StringUtils.isBlank(salt)||salt.length()!=29){
thrownewRuntimeException("Saltcan'tbeemptyandlengthmustbeto29");
}
if(!salt.startsWith(SALT_STARTSWITH)){
thrownewRuntimeException("Invalidsaltversion,saltversionis$2a$12");
}
Stringcipher=BCrypt.hashpw(encryptSource,salt);
MapbcryptResult=newHashMap();
bcryptResult.put(SALT_KEY,salt);
bcryptResult.put(CIPHER_KEY,cipher);
returnbcryptResult;
}
}
二、加密测试
MD5加密测试
/**
*MD5加密
*/
publicclassMD5Test{
publicstaticvoidmain(String[]args){
Stringstring="你好世界";
StringbyteArrayToHexString=MD5Utils.byteArrayToHexString(string.getBytes());
System.out.println(byteArrayToHexString);//e68891e698afe4b880e58fa5e8af9d
}
}
base64加密测试
/**
*base64加密
*/
publicclassBast64Tester{
publicstaticvoidmain(String[]args){
Stringstring="你好世界";
StringencodeData=Base64Util.encodeData(string);//加密
StringdecodeData=Base64Util.decodeData(encodeData);//解密
System.out.println(encodeData);//5oiR5piv5LiA5Liq5a2X56ym5Liy
System.out.println(decodeData);//你好世界
}
}
SHA加密测试
/**
*SHA加密
*/
publicclassShaTest{
publicstaticvoidmain(String[]args){
Stringstring="你好世界";
Stringsha256Crypt=Sha2Crypt.sha256Crypt(string.getBytes());
System.out.println(sha256Crypt);//$5$AFoQTeyt$TiqmobvcQXjXaAQMYosAAO4KI8LfigZMGHzq.Dlp4NC
}
}
BCrypt加密测试
/**
*BCrypt加密
*/
publicclassBCryptTest{
publicstaticvoidmain(String[]args){
Stringstring="你好世界";
Mapbcrypt=BcryptCipher.Bcrypt(string);
System.out.println(bcrypt.keySet());//[cipher,salt]
System.out.println(bcrypt.get("cipher"));//$2a$12$ylb92Z84gqlrSfzIztlCV.dK0xNbw.pOv3UwXXA76llOsNRTJsE/.
System.out.println(bcrypt.get("salt"));//$2a$12$ylb92Z84gqlrSfzIztlCV.
Mapbcrypt2=BcryptCipher.Bcrypt(bcrypt.get("salt"),string);
System.out.println(bcrypt2.get("SALT_KEY"));//null
System.out.println(bcrypt2.get("CIPHER_KEY"));//null
}
}
总结
以上所述是小编给大家介绍的浅析Java常用的4种加密方式（MD5+Base64+SHA+BCrypt）,希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对毛票票网站的支持！
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