package web;
import java.io.IOException;
import java.io.PrintWriter;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class AddEmpServlet extends HttpServlet {
public void service(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
// 设置中文的输入和输出
request.setCharacterEncoding("UTF-8");
response.setContentType("text/html;charset=UTF-8");
// 获取输出流对象，并输出信息
PrintWriter out = response.getWriter();
// 获取表单提交的数据
String name = request.getParameter("name");
double salary = Double.parseDouble(request.getParameter("salary"));
int age = Integer.parseInt(request.getParameter("age"));
out.print("添加成功");
//将数据插入到数据库t_emp表中
Connection conn = null;
PreparedStatement stat = null;
try {
conn = JdbcUtil.getConnection();
stat = conn.prepareStatement("insert into user values (?,?,?)");
stat.setString(1, name);
stat.setDouble(2, salary);
stat.setInt(3, age);
stat.executeUpdate();
out.println("添加成功");
} catch (Exception e) {
e.printStackTrace();
out.print("系统繁忙，稍后重试");
} finally{
JdbcUtil.release(null, stat, conn);
}
}
}
create table user(
name varchar(20),
salary varchar(20),
age int
);
package web;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.Properties;
/*
-
这是jdbc工具类。
*/
public class JdbcUtil {private static String driver;
private static String url;
private static String user;
private static String password;
private static Properties properties = new Properties();
//读取配置文件
static{
try{
// 加载配置文件.
properties.load(JdbcUtil.class.getClassLoader().getResourceAsStream("web/property.properties"));
driver = properties.getProperty("jdbc.driver");
url = properties.getProperty("jdbc.url");
user = properties.getProperty("jdbc.user");
password = properties.getProperty("jdbc.password");
Class.forName(driver);
} catch (Exception e) {
e.printStackTrace();
throw new RuntimeException(e);
}
}public static Connection getConnection() throws Exception {
Connection conn = DriverManager.getConnection(url,user,password);
return conn;
}public static void release (ResultSet rs ,Statement stmt,Connection conn){//关闭要返过来关闭
if(rs!= null){
try{
rs.close();
}catch(SQLException e ){
e.printStackTrace();
}
rs = null;
}
if(stmt != null)
{
try{
stmt.close();
}catch(SQLException e){
e.printStackTrace();
}
stmt = null;} if(conn!=null){ try{ conn.close(); }catch(SQLException e ){ e.printStackTrace(); } conn = null; }}
}
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>MyHtml.html</title>
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="this is my page">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<!--<link rel="stylesheet" type="text/css" href="./styles.css">-->
</head>
<body style = "font-size:24px">
<form action = "add" method = "post">
<fieldset>
<legend>添加员工</legend>
姓名：<input name = "name" ><br/>
薪水：<input name = "salary"><br/>
年龄：<input name = "age"><br/>
<input type = "submit" value = "添加">
</fieldset>
</form>
</body>
</html>
上面是servlet类和jdbc工具类和创建的数据表。页面上添加了，但是，存不进去到数据库。求解。
