V. Setting up the environment: auxiliary functions

V. Setting up the environment: auxiliary functions

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Writing Login Failure Exceptions

We are indemo-module04-util Under Modules, create a module named:package, create an exception class named: LoginFailedException --> as the login exception handler.

package ;

public class LoginFailedException  extends RuntimeException {

    public LoginFailedException() {
    }

    public LoginFailedException(String message) {
        super(message);
    }

    public LoginFailedException(String message, Throwable cause) {
        super(message, cause);
    }

    public LoginFailedException(Throwable cause) {
        super(cause);
    }

    public LoginFailedException(String message, Throwable cause, boolean enableSuppression, boolean writableStackTrace) {
        super(message, cause, enableSuppression, writableStackTrace);
    }
}

Writing Constant Classes

We are indemo-module04-util Under Modules, create a module named:package, create a class named: ImperialCourtConst class - > as a constant class that defines some constant information needed in our project.

package ;

public class ImperialCourtConst {

    public static final String LOGIN_FAILED_MESSAGE = "username、incorrect password，can't go to the palace！";
    public static final String ACCESS_DENIED_MESSAGE = "forbidden place during the palace palace exam (idiom); fig. women's palace，not be allowed to trespass！";
    public static final String LOGIN_EMP_ATTR_NAME = "loginInfo";
}

MD5 Tools (Encryption Tools category)

We are indemo-module04-util Under Modules, create a module named:Under the package "MD5Util", create a class named: MD5Util class --> as a tool class that defines some of the tool methods needed in our project.

package ;

import ;
import ;
import ;

public class MD5Util {
    /**
     * Execute against plaintext stringsMD5encrypted
     *
     * @param source
     * @return
     */
    public static String encode(String source) {

        // 1.Determine if a plaintext string is valid
        if (source == null || "".equals(source)) {
            throw new RuntimeException("用于encrypted的明文不可为空");
        }

        // 2.Declare the name of the algorithm
        String algorithm = "md5";

        // 3.gainMessageDigestboyfriend
        MessageDigest messageDigest = null;
        try {
            messageDigest = (algorithm);
        } catch (NoSuchAlgorithmException e) {
            ();
        }

        // 4.gain明文字符串对应的字节数组
        byte[] input = ();

        // 5.执行encrypted
        byte[] output = (input);

        // 6.establishBigIntegerboyfriend
        int signum = 1;
        BigInteger bigInteger = new BigInteger(signum, output);

        // 7.on the basis of16binary system willbigIntegerto a string
        int radix = 16;
        String encoded = (radix).toUpperCase();

        return encoded;
    }
}

Logging Profiles

at thatdemo-module01-web module, under the src/main/resources root path, create a file named The logging configuration file for theNote: The filename is the name of theIt can't be anything else. It has to be this. 。

<?xml version="1.0" encoding="UTF-8"? >;xml version="1.0" encoding="UTF-8"?
<configuration debug="true">!
    <! -- Specify the location of the log output -- > <!
    <appender name="STDOUT"
              class=""> <appender name="STDOUT
        <encoder>.
            <! -- Format of the log output -->
            <! -- In order: time, log level, thread name, class to print the log, contents of the log body, newlines --> <!
            <pattern>[%d{HH:mm:}] [%-5level] [%thread] [%logger] [%msg]%n</pattern>
            <charset>UTF-8</charset>
        </encoder>.
    </appender>.

    <! -- Set the global log level. The log levels are, in order, DEBUG, INFO, WARN, and ERROR -->.
    <! -- Specifies that any log level prints only the logs of the current level and subsequent levels. -->
    < root level="INFO">
        <! -- Specify the appender to print the logs, here the previously configured appender is referenced by "STDOUT" --> <appender-ref
        <appender-ref ref="STDOUT" />;
    </root>

    <! -- Specify a logging level specifically for a particular package -->
    <logger name="" level="DEBUG" additivity="false">
        <appender-ref ref="STDOUT" />
    </logger>

</configuration>

• Corresponding to the previous section in the sequence: ✏️✏️✏️Four, build the environment: expression layer - CSDN Blogs

• The corresponding sequence is the next section: ✏️✏️✏️