📄 chequebook.java
字号:
package pp;
import java.io.IOException;
import java.io.PrintWriter;
import java.sql.ResultSet;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class Chequebook extends HttpServlet {
/**
* Constructor of the object.
*/
public Chequebook() {
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=gb2312");
PrintWriter out = response.getWriter();
String accountNum=new String(request.getParameter("accountNum").getBytes("ISO8859_1"));
String password=new String(request.getParameter("password").getBytes("ISO8859_1"));
dbconn con=new dbconn();
ResultSet rs=null;
String sql="select PASSWORD,CHECKBOOK from ACCOUNT where ACCOUNTNUMBER='"+accountNum+"'";
try {
rs=con.executeQuery(sql);
if(rs.next()==true){
if(rs.getString("PASSWORD").equals(password)){
String cheque=rs.getString("CHECKBOOK");
System.out.println("cc"+cheque);
if(cheque.equals("是")){
out.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");
out.println("<HTML>");
out.println(" <HEAD><TITLE>A Servlet</TITLE>");
out.println("</HEAD>");
out.println(" <BODY>");
out.println("该帐号已经申请支票簿！<BR>");
out.println(" </BODY>");
out.println("</HTML>");
}else {
String sq="update ACCOUNT set CHECKBOOK='是'"+" where ACCOUNTNUMBER='"+accountNum+"'";
con.executeUpdate(sq);
out.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");
out.println("<HTML>");
out.println(" <HEAD><TITLE>A Servlet</TITLE>");
out.println("</HEAD>");
out.println(" <BODY>");
out.println("申请成功！ ");
out.println(" </BODY>");
out.println("</HTML>");
}
}else{
out.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");
out.println("<HTML>");
out.println(" <HEAD><TITLE>A Servlet</TITLE>");
out.println("</HEAD>");
out.println(" <BODY>");
out.print("密码不正确!");
out.println(" </BODY>");
out.println("</HTML>");
}
}else{
out.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");
out.println("<HTML>");
out.println(" <HEAD><TITLE>A Servlet</TITLE>");
out.println("</HEAD>");
out.println(" <BODY>");
out.print("该帐户不存在");
out.println(" </BODY>");
out.println("</HTML>");
}
con.closeConn();
}catch(Exception e){
e.printStackTrace();
}
}
/**
* 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 {
doGet(request,response);
}
/**
* Initialization of the servlet. <br>
*
* @throws ServletException if an error occurs
*/
public void init() throws ServletException {
// Put your code here
}
}
⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -