📄 servletpool.java
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package com;
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
import java.sql.*;
import javax.sql.DataSource;
import javax.naming.InitialContext;
public class ServletPool extends HttpServlet {
DataSource ds = null;
Connection conn = null;
public void getConnection() {
try {
InitialContext ctx = new InitialContext();
ds = (DataSource) ctx.lookup("java:comp/env/jdbc/ConnectionPool");
conn = ds.getConnection();
} catch (Exception ex) {
}
}
public void doGet(HttpServletRequest request, HttpServletResponse response) throws
ServletException, IOException {
request.setCharacterEncoding("gb2312");
PrintWriter out = response.getWriter();
this.getConnection();
out.println("<html>");
out.println("<head><title>VistorJDBC</title></head>");
out.println("<body>");
out.println("<div align='center'>");
out.println(
"<img src=picture/backPicture.jpg width=575 height=68><br>");
if (conn!=null) {
out.println(
"<img src = picture/success.jpg width =400 height =66 >");
} else {
out.println("<img src = picture/fail.jpg width =400 height =66 >");
}
out.println("</div>");
out.println("</body>");
out.println("</html>");
out.close();
}
}
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