MySQL和JSP是两个不同的技术,但它们可以很好地集成在一起,提供高效的数据库功能和灵活的Web应用程序开发。下面是关于MySQL和JSP的一些外文文献。
1. Using MySQL with JSP
<%@page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@page import="java.sql.*"%>
<%
try {
Class.forName("com.mysql.jdbc.Driver");
} catch (ClassNotFoundException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
Connection con = null;
Statement stmt = null;
String url = "jdbc:mysql://localhost:3306/mydatabase";
String user = "root";
String password = "password";
try {
con = DriverManager.getConnection(url, user, password);
stmt = con.createStatement();
ResultSet rs = stmt.executeQuery("SELECT * FROM mytable");
out.println("<table>");
while (rs.next()) {
out.println("<tr><td>" + rs.getString("name") + "</td><td>"
+ rs.getString("email") + "</td></tr>");
}
out.println("</table>");
} catch(SQLException e) {
out.println("Error: " + e.getMessage());
} finally {
try {
if(stmt!=null) stmt.close();
} catch(SQLException e) {}
try {
if(con!=null) con.close();
} catch(SQLException e) {}
}
%>
这篇外文文献展示了如何使用JSP连接到MySQL数据库并执行查询。代码使用Java的JDBC API连接到数据库,然后使用JSP输出查询结果。这种方法在小型Web应用程序中非常有用。
2. Best practices for MySQL and JSP integration
<%@page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@page import="java.sql.*"%>
<%
// Commonly used database settings
String url = "jdbc:mysql://localhost:3306/mydatabase";
String user = "root";
String password = "password";
// JDBC driver class name
String driver = "com.mysql.jdbc.Driver";
// Create a database connection object
Connection con = null;
try {
Class.forName(driver);
con = DriverManager.getConnection(url, user, password);
} catch (ClassNotFoundException ex) {
// handle the error
} catch (SQLException ex) {
// handle the error
}
// Set up the database query
String query = "SELECT * FROM mytable";
PreparedStatement ps = null;
ResultSet rs = null;
try {
ps = con.prepareStatement(query);
rs = ps.executeQuery();
} catch (SQLException ex) {
// handle the error
}
// Output the results
while (rs.next()) {
out.println("<tr><td>" + rs.getString("name") + "</td><td>"
+ rs.getString("email") + "</td></tr>");
}
// Free up resources
try {
rs.close();
} catch (Exception ex) {}
try {
ps.close();
} catch (Exception ex) {}
try {
con.close();
} catch (Exception ex) {}
%>
这篇外文文献提供了一些使用MySQL和JSP的最佳实践。代码中使用了 PreparedStatement,避免了SQL注入攻击,并提高了性能。此外,还展示了如何正确地释放数据库资源,以防止内存泄漏。