jsp连接数据库 练习
Posted woaidengziqi
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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>
<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>
<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>
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