jdbc连接方式（Oracle和mySql）

最新推荐文章于 2022-02-06 22:00:18 发布

原创最新推荐文章于 2022-02-06 22:00:18 发布 · 535 阅读

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CC 4.0 BY-SA版权

文章标签：

#jdbc #mysql #oracle #string #exception #initialization

本文提供了一个使用 Java 进行 MySQL 数据库操作的示例代码，包括连接数据库、执行查询与更新语句等基本功能，并展示了如何通过 JDBC 驱动实现这些操作。

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mySql
Class.forName("com.mysql.jdbc.Driver");
  String url = "jdbc:mysql://localhost:3306:test";
  Connection conn = DriverManager.getConnection(url, "root", "root");
 }


jdbc具体代码：
public class DBUtil {
	//String sDBDriver = "oracle.jdbc.driver.OracleDriver";
	String  sDBDriver="com.mysql.jdbc.Driver";
	String url="jdbc:mysql://localhost:goods";
	//String url = "jdbc:oracle:thin:@10.74.10.225:1521:myoracle";
	String sHint = "";
	ResultSet rs = null;
	Connection conn = null;
	Statement stmt = null;
	String user = "test";
	String pwd = "123456";

	// 初始化
	public boolean initialize(String dbDrive, String dbConn, String user,
			String pwd) {
		sDBDriver = dbDrive;
		url = dbConn;
		user = user;
		pwd = pwd;

		return initialize();
	}

	// 初始化
	public boolean initialize() {
		try {
			Class.forName(sDBDriver);
			sHint = "Initialization sucessfully";
			return true;
		} catch (ClassNotFoundException e) {
			sHint = "Initialization Exception:" + e.getMessage();
			return false;
		}
	}

	// 执行查询语句
	public ResultSet executeQuery(String sql) {
		rs = null;
		try {
			conn = DriverManager.getConnection(url, user, pwd);
			stmt = conn.createStatement();
			rs = stmt.executeQuery(sql);
		} catch (SQLException ex) {
			sHint = "Query Exception:" + ex.getMessage();
		}

		return rs;
	}

	// 执行更新语句
	public boolean executeUpdate(String sql) {
		try {
			conn = DriverManager.getConnection(url, user, pwd);
			stmt = conn.createStatement();
			stmt.executeUpdate(sql);
			return true;
		} catch (SQLException ex) {
			sHint = "Update Exception :" + ex.getMessage();
			return false;
		}
	}

	// 关闭连接、结果集、statemernt,释放资源
	public boolean close() {
		try {
			if (rs != null)
				rs.close();
			if (stmt != null)
				stmt.close();
			if (conn != null)
				conn.close();

			return true;

		} catch (SQLException ex) {
			sHint = "Close Exception:" + ex.getMessage();
			return false;
		}
	}
	
	public String getSHint() {
		return sHint;
	}

	public void setSDBDriver(String dbDriver) {
		sDBDriver = dbDriver;
	}

	public String getSDBDriver() {
		return sDBDriver;
	}

	public String getUrl() {
		return url;
	}

	public void setUrl(String s) {
		url = s;
	}

	public ResultSet getResultSet() {
		return rs;
	}

}