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mysql和jsp的外文文獻

林國瑞2年前10瀏覽0評論

MySQL和JSP是兩個不同的技術,但它們可以很好地集成在一起,提供高效的數據庫功能和靈活的Web應用程序開發。下面是關于MySQL和JSP的一些外文文獻。

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) {}
}
%>

這篇外文文獻展示了如何使用JSP連接到MySQL數據庫并執行查詢。代碼使用Java的JDBC API連接到數據庫,然后使用JSP輸出查詢結果。這種方法在小型Web應用程序中非常有用。

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) {}
%>

這篇外文文獻提供了一些使用MySQL和JSP的最佳實踐。代碼中使用了 PreparedStatement,避免了SQL注入攻擊,并提高了性能。此外,還展示了如何正確地釋放數據庫資源,以防止內存泄漏。