练习-JSP连接数据库
Posted mengjia0513
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<body> <form action="tianjia.jsp"> <table> <tr> <td>序号：</td> <td><input type="text" name="id"></td> </tr> <tr> <td>性别：</td> <td><input type="text" name="sex"></td> </tr> <tr> <td>年龄：</td> <td><input type="text" name="age"></td> </tr> <tr> <td><input type="submit" name="sub" value="提交"></td> </tr> </table> </form> <br> </body> main.jsp
<body> <% request.setCharacterEncoding("utf-8"); String id = request.getParameter("id"); String sex = request.getParameter("sex"); String age = request.getParameter("age"); Connection con = null; Statement st = null; ResultSet rs = null; //注册驱动 try { Class.forName("com.mysql.jdbc.Driver"); //加载驱动 String url = "jdbc:mysql://localhost:3306/jdbc"; String user = "root"; String password = "root"; con = DriverManager.getConnection(url, user, password); //创建语句 st = con.createStatement(); String sql = "insert into ceshi(id,sex,age)" + "value(" + id + ",‘" + sex + "‘,‘" + age + "‘)"; int row = st.executeUpdate(sql); // 5.处理结果 if (row > 0) { response.sendRedirect("text.jsp"); } } catch (Exception e) { e.printStackTrace(); } finally { try { if (rs != null) { rs.close(); } } finally { try { if (st != null) { st.close(); } } finally { if (con != null) { con.close(); } } } } %> <br> </body> increase.jsp
<body> <% /* String id=request.getParameter("id"); byte b[]=id.getBytes("UTF-8"); id=new String(b,"UTF-8"); String sex=request.getParameter("sex"); byte b1[]=sex.getBytes("UTF-8"); sex=new String(b1,"UTF-8"); String age=request.getParameter("age"); byte b2[]=age.getBytes("UTF-8"); age=new String(b2,"UTF-8"); */ Connection con = null; Statement st = null; ResultSet rs = null; //注册驱动 try { Class.forName("com.mysql.jdbc.Driver"); //加载驱动 String url = "jdbc:mysql://localhost:3306/jdbc"; String user = "root"; String password = "root"; con = DriverManager.getConnection(url, user, password); //创建语句 st = con.createStatement(); // rs = st.executeQuery("select id,sex,age from ceshi"); // 5.处理结果 /*while (rs.next()) { out.println(rs.getInt("id") + " " + rs.getString("sex") + " " + rs.getInt("age"));}*/ %> <table align="center"> <tr> <td>id:</td> <td>性别：</td> <td>年龄：</td> </tr> <% rs = st.executeQuery("select id,sex,age from ceshi"); %> <% while (rs.next()) { %> <tr> <td><%=rs.getInt("id")%></td> <td><%=rs.getString("sex")%></td> <td><%=rs.getInt("age")%></td> </tr> <% } %> <% } catch (Exception e) { e.printStackTrace(); } finally { try { if (rs != null) { rs.close(); } } finally { try { if (st != null) { st.close(); } } finally { if (con != null) { con.close(); } } } } %> </table> </body> slelect.jsp
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