com.mysql.jdbc.Connection Java Examples

The following examples show how to use com.mysql.jdbc.Connection. You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example #1
Source File: AdminCommand.java    From mapleLemon with GNU General Public License v2.0 6 votes vote down vote up
@Override
public int execute(MapleClient c, String[] splitted) {
    if (splitted.length < 2) {
        c.getPlayer().dropMessage(0, splitted[0] + " <SQL命令>");
        return 0;
    }
    try {
        Connection con = (Connection) DatabaseConnection.getConnection();
        PreparedStatement ps = (PreparedStatement) con.prepareStatement(StringUtil.joinStringFrom(splitted, 1));
        ps.executeUpdate();
        ps.close();
    } catch (SQLException e) {
        c.getPlayer().dropMessage(0, "执行SQL命令失败");
        return 0;
    }
    return 1;
}
 
Example #2
Source File: DepartmentDao.java    From StudentManagement with MIT License 6 votes vote down vote up
public ArrayList<Department> query_all_department() {
	Connection conn = DBUtils.getConnection();
	String sql = "select * from department order by dno;";
	ArrayList<Department> results = new ArrayList<Department>();
	
	try {
		PreparedStatement ps = (PreparedStatement) conn.prepareStatement(sql);
		ResultSet rs = ps.executeQuery();
		while (rs.next()){
			Department temp = new Department();
			temp.setDno(rs.getString("Dno")); 
			temp.setDname(rs.getString("Dname"));
			results.add(temp);
		}
		rs.close();
		ps.close();
	} catch (SQLException e) {
		e.printStackTrace();
	} finally {
		DBUtils.closeConnection(conn);
	}
	return results;
}
 
Example #3
Source File: ServerStatusDiffInterceptor.java    From r-course with MIT License 6 votes vote down vote up
public ResultSetInternalMethods preProcess(String sql, Statement interceptedStatement, Connection connection) throws SQLException {

        if (connection.versionMeetsMinimum(5, 0, 2)) {
            populateMapWithSessionStatusValues(connection, this.preExecuteValues);
        }

        return null; // we don't actually modify a result set
    }
 
Example #4
Source File: UserDao.java    From StudentManagement with MIT License 6 votes vote down vote up
public int delete_user(String username) {
	Connection conn = DBUtils.getConnection();
	String sql = "delete from user where username = ?;";
	
	int flag = 0;
	try {
		PreparedStatement ps = (PreparedStatement) conn.prepareStatement(sql);
		ps.setString(1, username);
		flag = ps.executeUpdate();
		ps.close();
	} catch (SQLException e) {
		e.printStackTrace();
	}finally {
		DBUtils.closeConnection(conn);
	}
	return flag;
}
 
Example #5
Source File: UserDao.java    From StudentManagement with MIT License 6 votes vote down vote up
public ArrayList<User> query_all_user() {
	Connection conn = DBUtils.getConnection();
	String sql = "select * from user order by username;";
	ArrayList<User> results = new ArrayList<User>();
	
	try {
		PreparedStatement ps = (PreparedStatement) conn.prepareStatement(sql);
		ResultSet rs = ps.executeQuery();

		while(rs.next()){
			User temp = new User();
			temp.setUsername(rs.getString("username"));
			temp.setPassword(rs.getString("password"));
			temp.setLevel(rs.getString("level"));
			results.add(temp);
		}
		//关闭资源
		rs.close();
		ps.close();
	} catch (SQLException e) {
		e.printStackTrace();
	}finally {
		DBUtils.closeConnection(conn);
	}
	return results;
}
 
Example #6
Source File: UserDao.java    From StudentManagement with MIT License 6 votes vote down vote up
public User register(String username,String password,String level) {
	Connection conn = DBUtils.getConnection();
	User user = null;
	
	try {
		//判断数据库中是否存在该用户
		if(!userIsExist(username)){//不存在该用户,可以注册
			user = new User();//实例化一个user对象
			//给用户对象赋值
			user.setUsername(username);
			user.setPassword(password);
			user.setLevel(level);
			//将用户对象写入数据库
			Statement stmt = (Statement) conn.createStatement();
			stmt.executeUpdate("insert into user values('"+username+"','"+password+"','"+level+"');");
			stmt.close();//释放资源
		}
	} catch (Exception e) {
		e.printStackTrace();
	}finally {
		DBUtils.closeConnection(conn);
	}
	return user;
}
 
Example #7
Source File: UserDao.java    From StudentManagement with MIT License 6 votes vote down vote up
public boolean userIsExist(String username) {
	Connection conn = DBUtils.getConnection();
	String sql = "select * from user where username = ?";
	try{
		//获取PreparedStatement对象
		PreparedStatement ps = (PreparedStatement) conn.prepareStatement(sql);
		ps.setString(1, username);//给用户对象属性赋值
		ResultSet rs = ps.executeQuery();
		if (rs.next()) {
			//数据库中存在此用户
			return true;
		}
		//释放资源
		rs.close();
		ps.close();
	} catch (SQLException e) {
		e.printStackTrace();
	}finally {
		DBUtils.closeConnection(conn);
	}
	return false;
}
 
Example #8
Source File: CourseDao.java    From StudentManagement with MIT License 6 votes vote down vote up
public int alter_course(String cno,String after_cno,String after_cname,String after_cteacher,double after_ccredit) {
	Connection conn = DBUtils.getConnection();
	String sql = "update course set cno = ?,cname = ?,cteacher = ?,ccredit = ? where cno = ?;";
	int flag = 0;
	try {
		PreparedStatement ps = (PreparedStatement) conn.prepareStatement(sql);
		ps.setString(1, after_cno);
		ps.setString(2, after_cname);
		ps.setString(3, after_cteacher);
		ps.setDouble(4, after_ccredit);
		ps.setString(5, cno);
		flag = ps.executeUpdate();
		ps.close();
	} catch (SQLException e) {
		e.printStackTrace();
	}finally {
		DBUtils.closeConnection(conn);
	}
	return flag;
}
 
Example #9
Source File: CourseDao.java    From StudentManagement with MIT License 6 votes vote down vote up
public int delete_course(String Cno) {
	Connection conn = DBUtils.getConnection();
	String sql = "delete from course where Cno = ?;";
	int flag = 0;
	try {
		PreparedStatement ps = (PreparedStatement) conn.prepareStatement(sql);
		ps.setString(1, Cno);
		flag = ps.executeUpdate();
		ps.close();
	} catch (SQLException e) {
		e.printStackTrace();
	} finally {
		DBUtils.closeConnection(conn);
	}
	return flag;
}
 
Example #10
Source File: CourseDao.java    From StudentManagement with MIT License 6 votes vote down vote up
public int insert_course(String Cno, String Cname, String Cteacher, double Ccredit) {
	Connection conn = DBUtils.getConnection();
	String sql = "insert into course values(?,?,?,?);";
	int flag = 0;
	try {
		PreparedStatement ps = (PreparedStatement) conn.prepareStatement(sql);
		ps.setString(1, Cno);
		ps.setString(2, Cname);
		ps.setString(3, Cteacher);
		ps.setDouble(4, Ccredit);
		flag = ps.executeUpdate();
		ps.close();
	} catch (SQLException e) {
		e.printStackTrace();
	} finally {
		DBUtils.closeConnection(conn);
	}
	return flag;
}
 
Example #11
Source File: DepartmentDao.java    From StudentManagement with MIT License 6 votes vote down vote up
public int delete_department(String dno) {
	Connection conn = DBUtils.getConnection();
	String sql = "delete from department where dno = ?;";
	int flag = 0;
	try {
		PreparedStatement ps = (PreparedStatement) conn.prepareStatement(sql);
		ps.setString(1, dno);
		flag = ps.executeUpdate();
		ps.close();
	} catch (SQLException e) {
		e.printStackTrace();
	}finally {
		DBUtils.closeConnection(conn);
	}
	return flag;
}
 
Example #12
Source File: ClassDao.java    From StudentManagement with MIT License 6 votes vote down vote up
public ArrayList<Class> query_all_class() {
	Connection conn = DBUtils.getConnection();
	String sql = "select * from class order by clno;";
	ArrayList<Class> results = new ArrayList<Class>();
	try {
		PreparedStatement ps = (PreparedStatement) conn.prepareStatement(sql);
		ResultSet rs = ps.executeQuery();
		while (rs.next()) {
			Class temp = new Class();
			temp.setClno(rs.getString("clno"));
			temp.setClname(rs.getString("clname"));
			temp.setDno(rs.getString("dno"));
			results.add(temp);
		}
		// 关闭资源
		rs.close();
		ps.close();
	} catch (SQLException e) {
		e.printStackTrace();
	} finally {
		DBUtils.closeConnection(conn);
	}
	return results;
}
 
Example #13
Source File: ClassDao.java    From StudentManagement with MIT License 6 votes vote down vote up
public int delete_class(String clno) {
	Connection conn = DBUtils.getConnection();
	String sql = "delete from class where clno = ?;";
	int flag = 0;
	try {
		PreparedStatement ps = (PreparedStatement) conn.prepareStatement(sql);
		ps.setString(1, clno);
		flag = ps.executeUpdate();
		ps.close();
	} catch (SQLException e) {
		e.printStackTrace();
	} finally {
		DBUtils.closeConnection(conn);
	}
	return flag;
}
 
Example #14
Source File: ServerStatusDiffInterceptor.java    From r-course with MIT License 6 votes vote down vote up
private void populateMapWithSessionStatusValues(Connection connection, Map<String, String> toPopulate) throws SQLException {
    java.sql.Statement stmt = null;
    java.sql.ResultSet rs = null;

    try {
        toPopulate.clear();

        stmt = connection.createStatement();
        rs = stmt.executeQuery("SHOW SESSION STATUS");
        Util.resultSetToMap(toPopulate, rs);
    } finally {
        if (rs != null) {
            rs.close();
        }

        if (stmt != null) {
            stmt.close();
        }
    }
}
 
Example #15
Source File: TracingStatementInterceptor.java    From brave with Apache License 2.0 6 votes vote down vote up
/**
 * Uses {@link ThreadLocalSpan} as there's no attribute namespace shared between callbacks, but
 * all callbacks happen on the same thread.
 *
 * <p>Uses {@link ThreadLocalSpan#CURRENT_TRACER} and this interceptor initializes before
 * tracing.
 */
@Override
public ResultSetInternalMethods preProcess(String sql, Statement interceptedStatement,
  Connection connection) {
  // Gets the next span (and places it in scope) so code between here and postProcess can read it
  Span span = ThreadLocalSpan.CURRENT_TRACER.next();
  if (span == null || span.isNoop()) return null;

  // When running a prepared statement, sql will be null and we must fetch the sql from the statement itself
  if (interceptedStatement instanceof PreparedStatement) {
    sql = ((PreparedStatement) interceptedStatement).getPreparedSql();
  }
  int spaceIndex = sql.indexOf(' '); // Allow span names of single-word statements like COMMIT
  span.kind(CLIENT).name(spaceIndex == -1 ? sql : sql.substring(0, spaceIndex));
  span.tag("sql.query", sql);
  parseServerIpAndPort(connection, span);
  span.start();
  return null;
}
 
Example #16
Source File: SessionAssociationInterceptor.java    From r-course with MIT License 6 votes vote down vote up
public ResultSetInternalMethods preProcess(String sql, Statement interceptedStatement, Connection connection) throws SQLException {
    String key = getSessionKey();

    if (key != null && !key.equals(this.currentSessionKey)) {
        PreparedStatement pstmt = connection.clientPrepareStatement("SET @mysql_proxy_session=?");

        try {
            pstmt.setString(1, key);
            pstmt.execute();
        } finally {
            pstmt.close();
        }

        this.currentSessionKey = key;
    }

    return null;
}
 
Example #17
Source File: ResultSetScannerInterceptor.java    From r-course with MIT License 6 votes vote down vote up
public void init(Connection conn, Properties props) throws SQLException {
    String regexFromUser = props.getProperty("resultSetScannerRegex");

    if (regexFromUser == null || regexFromUser.length() == 0) {
        throw new SQLException("resultSetScannerRegex must be configured, and must be > 0 characters");
    }

    try {
        this.regexP = Pattern.compile(regexFromUser);
    } catch (Throwable t) {
        SQLException sqlEx = new SQLException("Can't use configured regex due to underlying exception.");
        sqlEx.initCause(t);

        throw sqlEx;
    }

}
 
Example #18
Source File: jdbcUtils.java    From NSTProxy with MIT License 6 votes vote down vote up
public int queryrepeat(String url,String body,Connection conn) {
 String sql_exec = "SELECT COUNT(*) as count FROM httplog WHERE url=? AND body = ?";
 int flag = 0;
 try {
	PreparedStatement ps = conn.prepareStatement(sql_exec);
	ps.setString(1, url);
	ps.setString(2, body);
	ResultSet rs = ps.executeQuery();
	while (rs.next()) {
		flag = rs.getInt("count");
	}
	return flag;
	
} catch (SQLException e) {
	e.printStackTrace();
}
 
return 0;
}
 
Example #19
Source File: jdbcUtils.java    From NSTProxy with MIT License 6 votes vote down vote up
public int insert(Map<String,String> sql,Connection conn,PrintWriter stdout) {
 String sql_exec = "INSERT INTO httplog(url,method,header,body) VALUE(?,?,?,?)";
 try {
	PreparedStatement ps = conn.prepareStatement(sql_exec);
	ps.setString(1, sql.get("url"));
	ps.setString(2, sql.get("method"));
	ps.setString(3, sql.get("headers"));
	ps.setString(4, sql.get("body"));
	int i = ps.executeUpdate();
	stdout.println("[+] insert ["+i+"] row ");
	return i;
} catch (SQLException e) {
	e.printStackTrace();
}
 
 return 0;
}
 
Example #20
Source File: StudentDao.java    From StudentManagement with MIT License 6 votes vote down vote up
public int delete_student(String sno) {
	Connection conn = DBUtils.getConnection();
	String sql = "delete from student where sno = ?;";
	int flag = 0;
	try {
		PreparedStatement ps = (PreparedStatement) conn.prepareStatement(sql);
		ps.setString(1, sno);
		flag = ps.executeUpdate();
		ps.close();
	} catch (SQLException e) {
		e.printStackTrace();
	} finally {
		DBUtils.closeConnection(conn);
	}
	return flag;
}
 
Example #21
Source File: StudentDao.java    From StudentManagement with MIT License 6 votes vote down vote up
public int insert_student(String Sno,String Sname,String Ssex,int Sage,String Clno) {
	Connection conn = DBUtils.getConnection();
	String sql = "insert into student values(?,?,?,?,?);";
	int flag = 0;
	try {
		PreparedStatement ps = (PreparedStatement) conn.prepareStatement(sql);
		ps.setString(1, Sno);
		ps.setString(2, Sname);
		ps.setString(3, Ssex);
		ps.setInt(4, Sage);
		ps.setString(5, Clno);
		flag = ps.executeUpdate();
		ps.close();
	} catch (SQLException e) {
		e.printStackTrace();
	} finally {
		DBUtils.closeConnection(conn);
	}
	return flag;
}
 
Example #22
Source File: StudentDao.java    From StudentManagement with MIT License 6 votes vote down vote up
public ArrayList<Student> query_all_student() {
	Connection conn = DBUtils.getConnection();
	String sql = "select * from student order by sno;";
	ArrayList<Student> results = new ArrayList<Student>();
	try {
		PreparedStatement ps = (PreparedStatement) conn.prepareStatement(sql);
		ResultSet rs = ps.executeQuery();
		while (rs.next()) {
			Student temp = new Student();
			temp.setSno(rs.getString("sno"));
			temp.setSname(rs.getString("sname"));
			temp.setSsex(rs.getString("ssex"));
			temp.setSage(rs.getInt("sage"));
			temp.setClno(rs.getString("clno"));
			results.add(temp);
		}
		// 关闭资源
		rs.close();
		ps.close();
	} catch (SQLException e) {
		e.printStackTrace();
	} finally {
		DBUtils.closeConnection(conn);
	}
	return results;
}
 
Example #23
Source File: SCDao.java    From StudentManagement with MIT License 6 votes vote down vote up
public int alter_sc(String Sno, String Cno,double after_grade) {
	Connection conn = DBUtils.getConnection();
	String sql = "update sc set grade = ? where sno = ? and cno = ?;";
	int flag = 0;
	try {
		PreparedStatement ps = (PreparedStatement) conn.prepareStatement(sql);
		ps.setDouble(1, after_grade);
		ps.setString(2, Sno);
		ps.setString(3, Cno);
		flag = ps.executeUpdate();
		ps.close();
	} catch (SQLException e) {
		e.printStackTrace();
	} finally {
		DBUtils.closeConnection(conn);
	}
	return flag;
}
 
Example #24
Source File: SCDao.java    From StudentManagement with MIT License 6 votes vote down vote up
public int delete_sc(String Sno,String Cno) {
	Connection conn = DBUtils.getConnection();
	String sql = "delete from sc where sno = ? and cno = ?;";
	int flag = 0;
	try {
		PreparedStatement ps = (PreparedStatement) conn.prepareStatement(sql);
		ps.setString(1, Sno);
		ps.setString(2, Cno);
		flag = ps.executeUpdate();
		ps.close();
	} catch (SQLException e) {
		e.printStackTrace();
	} finally {
		DBUtils.closeConnection(conn);
	}
	return flag;
}
 
Example #25
Source File: ClassDao.java    From StudentManagement with MIT License 6 votes vote down vote up
public int alter_class(String clno, String after_clno, String after_clname, String after_dno) {
	Connection conn = DBUtils.getConnection();
	String sql = "update class set clno = ?,clname = ?,dno = ? where clno = ?;";
	int flag = 0;
	try {
		PreparedStatement ps = (PreparedStatement) conn.prepareStatement(sql);
		ps.setString(1, after_clno);
		ps.setString(2, after_clname);
		ps.setString(3, after_dno);
		ps.setString(4, clno);
		flag = ps.executeUpdate();
		ps.close();
	} catch (SQLException e) {
		e.printStackTrace();
	} finally {
		DBUtils.closeConnection(conn);
	}
	return flag;
}
 
Example #26
Source File: SuspendableXAConnection.java    From Komondor with GNU General Public License v3.0 5 votes vote down vote up
private static synchronized XAConnection findConnectionForXid(Connection connectionToWrap, Xid xid) throws SQLException {
    // TODO: check for same GTRID, but different BQUALs...MySQL doesn't allow this yet

    // Note, we don't need to check for XIDs here, because MySQL itself will complain with a XAER_NOTA if need be.

    XAConnection conn = XIDS_TO_PHYSICAL_CONNECTIONS.get(xid);

    if (conn == null) {
        conn = new MysqlXAConnection(connectionToWrap, connectionToWrap.getLogXaCommands());
        XIDS_TO_PHYSICAL_CONNECTIONS.put(xid, conn);
    }

    return conn;
}
 
Example #27
Source File: ConnectionWrapper.java    From r-course with MIT License 5 votes vote down vote up
/**
 * Construct a new LogicalHandle and set instance variables
 * 
 * @param mysqlPooledConnection
 *            reference to object that instantiated this object
 * @param mysqlConnection
 *            physical connection to db
 * 
 * @throws SQLException
 *             if an error occurs.
 */
public ConnectionWrapper(MysqlPooledConnection mysqlPooledConnection, Connection mysqlConnection, boolean forXa) throws SQLException {
    super(mysqlPooledConnection);

    this.mc = mysqlConnection;
    this.closed = false;
    this.isForXa = forXa;

    if (this.isForXa) {
        setInGlobalTx(false);
    }
}
 
Example #28
Source File: ServerStatusDiffInterceptor.java    From Komondor with GNU General Public License v3.0 5 votes vote down vote up
public ResultSetInternalMethods preProcess(String sql, Statement interceptedStatement, Connection connection) throws SQLException {

        if (connection.versionMeetsMinimum(5, 0, 2)) {
            populateMapWithSessionStatusValues(connection, this.preExecuteValues);
        }

        return null; // we don't actually modify a result set
    }
 
Example #29
Source File: Sha256PasswordPlugin.java    From Komondor with GNU General Public License v3.0 5 votes vote down vote up
public void init(Connection conn, Properties props) throws SQLException {
    this.connection = conn;

    String pkURL = this.connection.getServerRSAPublicKeyFile();
    if (pkURL != null) {
        this.publicKeyString = readRSAKey(this.connection, pkURL);
    }
}
 
Example #30
Source File: DBUtils.java    From StudentManagement with MIT License 5 votes vote down vote up
/**
    * 关闭数据库连接
    * @param conn Connection对象
    */
   public static void closeConnection(Connection conn) {
	//判断conn是否为空
   	if(conn != null){
   		try {
			conn.close();//关闭数据库连接
		} catch (SQLException e) {
			// TODO: handle exception
			e.printStackTrace();
		}
   	}
}