📄 dbtest.java
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package com.flamingsun.db;
import java.io.IOException;
import java.io.PrintWriter;
import java.sql.Connection;
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 dbtest extends HttpServlet {
/**
* Constructor of the object.
*/
public dbtest() {
super();
}
/**
* Destruction of the servlet. <br>
*/
public void destroy() {
super.destroy(); // Just puts "destroy" string in log
// Put your code here
}
/**
* The doGet method of the servlet. <br>
*
* This method is called when a form has its tag value method equals to get.
*
* @param request the request send by the client to the server
* @param response the response send by the server to the client
* @throws ServletException if an error occurred
* @throws IOException if an error occurred
*/
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html;charset=GBK");
PrintWriter out = response.getWriter();
out
.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");
out.println("<HTML>");
out.println(" <HEAD><TITLE>A Servlet</TITLE></HEAD>");
out.println(" <BODY>");
Connection connection=SqlHelper.getConn();
String message="成功";
if(connection==null){
message="失败";
}
out.println("<h1 style=\"font-family: 华文楷体\"><span style=\"color:#999999\">数据库连接</span><span style=\"color: #FF0000\">"+message+"</span>!!!</h1>");
//关闭数据库连接
SqlHelper.closeConn(null, null);
try {
if(connection.isClosed())
out.println("<br/><h1 style=\"font-family: 华文楷体\"><span style=\"color:#999999\">数据库连接</span><span style=\"color: #FF0000\">"+"已关闭！"+"</span>!!!</h1>");
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
out.println(" </BODY>");
out.println("</HTML>");
out.flush();
out.close();
}
/**
* The doPost method of the servlet. <br>
*
* This method is called when a form has its tag value method equals to post.
*
* @param request the request send by the client to the server
* @param response the response send by the server to the client
* @throws ServletException if an error occurred
* @throws IOException if an error occurred
*/
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
this.doGet(request, response);
}
/**
* Initialization of the servlet. <br>
*
* @throws ServletException if an error occurs
*/
public void init() throws ServletException {
// Put your code here
}
}
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