import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class Oracle {
  private static final Logger logger = LoggerFactory.getLogger(Oracle.class);
  public static Connection getConnection() {
    Connection conn = null;
    try {
      Class.forName("oracle.jdbc.driver.OracleDriver");
      logger.debug("尝试连接数据库");
      String url = "jdbc:oracle:thin:@192.168.0.20:1541:test";
      String username = "apps";
      String password = "apps";
      conn = DriverManager.getConnection(url, username, password);
    } catch (ClassNotFoundException cnfe) {
      logger.error(cnfe.getMessage());
    } catch (SQLException sqle) {
      logger.error(sqle.getMessage());
    }
    return conn;
  }
  public static void closeConnection(Connection conn) {
    try {
      if (conn != null) {
        conn.close();
        conn = null;
      }
    } catch (SQLException sqle) {
      logger.error(sqle.getMessage());
    }
  }
}

-- Create table
create table LH_USER_T
(
 id    INTEGER not null,
 username VARCHAR2(255), -- 用户名
 password VARCHAR2(255), -- 密码
 roleid  INTEGER -- 外键链接
)

import java.sql.CallableStatement;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.sql.Types;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class UserDao {
  private static final Logger logger = LoggerFactory.getLogger(UserDao.class);
  // 添加用户
  public void saveUser(int userid, String username, String password, int roleid) {
    String sql = "insert into lh_user_t values (?,?,?,?)";
    Connection conn = Oracle.getConnection();
    PreparedStatement ps = null;
    try {
      ps = conn.prepareStatement(sql);
      ps.setInt(1, userid);
      ps.setString(2, username);
      ps.setString(3, password);
      ps.setInt(4, roleid);
      ps.executeUpdate();
    } catch (SQLException sqle) {
      logger.error(sqle.getMessage());
    } finally {
      Oracle.closeConnection(conn);
      if (ps != null) {
        try {
          ps.close();
        } catch (SQLException e) {
          logger.error(e.getMessage());
        }
        ps = null;
      }
    }
  }
  // 验证用户（后面添加）
}

import org.apache.shiro.crypto.hash.Sha256Hash;
public class UserService {
  private UserDao userDao;
  private static int userid = 1;
  public UserService() {
    userDao = new UserDao();
  }
  public void saveUser(String username, String password, int roleid) {
    String nPassword = new Sha256Hash(password).toHex();
    userDao.saveUser(UserService.userid, username, nPassword, roleid);
  }
  //...
}

create or replace procedure validate_user(in_username in varchar2,
 in_password in varchar2,
 out_result out varchar2) as
 tmp_uid lh_user_t.id%type;
begin
 select count(*)
  into tmp_uid
  from lh_user_t t
  where t.username = in_username
   and t.password = in_password;
 out_result := 'S';
exception
 when NO_DATA_FOUND then
  out_result := 'E';
end;

import java.sql.CallableStatement;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.sql.Types;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class UserDao {
  private static final Logger logger = LoggerFactory.getLogger(UserDao.class);
  // 添加用户
  // {...}
  // 验证用户
  public String validateUser(String username, String password) {
    String sql = "call validate_user(?,?,?)";
    String result = null;
    Connection conn = Oracle.getConnection();
    CallableStatement cs = null;
    try {
      cs = conn.prepareCall(sql);
      cs.setString(1, username);
      cs.setString(2, password);
      cs.registerOutParameter(3, Types.VARCHAR);
      cs.execute();
      result = cs.getString(3);
    } catch (SQLException sqle) {
      logger.error(sqle.getMessage());
    } finally {
      Oracle.closeConnection(conn);
      if (cs != null) {
        try {
          cs.close();
        } catch (SQLException e) {
          logger.error(e.getMessage());
        }
        cs = null;
      }
    }
    return result;
  }
}

public class UserService {
  private UserDao userDao;
  private static int userid = 1;
  public UserService() {
    userDao = new UserDao();
  }
  // {...}
  public String validateUser(String username, String password) {
    String nPassword = new Sha256Hash(password).toHex();
    return userDao.validateUser(username, nPassword);
  }
}