tomcat6 jndi 三

4.DBUserInfo.java如下：
package com.huawei.support.dao;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import com.huawei.it.common.encryption.exception.AppException;
import com.huawei.it.common.encryption.util.DESEncryptionFactory;
import com.huawei.it.common.encryption.util.DESEncryptor;
import com.huawei.support.exception.ApplicationException;

public class DBUserInfo
{
    private static Log sLog = LogFactory.getLog(DBUserInfo.class);
    private String mUserName;
    private String mPassword;
    public String getmUserName()
    {
        return mUserName;
    }
    public void setmUserName(String aUserName)
    {
        this.mUserName = aUserName;
    }
    public void setmPassword(String aPassword)
    {
        this.mPassword = aPassword;
    }
    public String getmPassword() throws ApplicationException
    {
        String pwd = null;
        try
        {
            Context initCtx = new InitialContext();

            if (initCtx == null)
            {
                throw new ApplicationException("Context初始化失败! ");
            }
            // 在JNDI中查找
            Context ctx = (Context) initCtx.lookup("java:comp/env");
            if (ctx != null)
            {
                DBUserInfo dbUserInfo = (DBUserInfo) ctx.lookup("dbUserInfo");
                if (dbUserInfo != null)
                {
                    // DES解密
                    pwd = decrypt(dbUserInfo.mPassword);
                }
            }
        }
        catch (NamingException e)
        {
            sLog.error(e);
            // TODO:JUnit测试用,正式环境需要删除.
            pwd = "tbz19078";

//            throw new ApplicationException(e);
        }
        return pwd;
    }
    /** DES解密.
     * @param aDataSource 加密过的密文
     * @return 解密后的明文
     * @throws ApplicationException ApplicationException
     */
    private static String decrypt(String aDataSource)
        throws ApplicationException
    {
        DESEncryptionFactory factory = null;
        try
        {
            factory = DESEncryptionFactory.getInstance();
            DESEncryptor encryptor =
                factory.getEncryptor(DESEncryptionFactory.DES);
            return encryptor.decrypt(aDataSource);
        }
        catch (AppException e)
        {
            sLog.error("DES解密出错!");
            sLog.error(e);
            throw new ApplicationException(e);
        }
    }
}