📄 modify.java
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package ser;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import b.Handle;
import b.IdentifyVo;
public class Modify extends HttpServlet {
/**
* Constructor of the object.
*/
public Modify() {
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");
request.setCharacterEncoding("gb2312");
Handle handle = new Handle();
// 改
//返回要更改的值传到显示层
try {
IdentifyVo iv=handle.selectOne(Integer.parseInt(request.getParameter("id")));
request.setAttribute("iv_name",iv);
RequestDispatcher rd=request.getRequestDispatcher("/modify.jsp");
rd.forward(request,response);
} catch (Exception e) {
e.getStackTrace();
}
//取得显示层更改后传进来的值并封装到vo里去
try {
IdentifyVo iv=new IdentifyVo();
iv.setId(Integer.parseInt(request.getParameter("text_id")));
iv.setName(request.getParameter("text_name_modify"));
handle.voModify(iv);
} catch (Exception e) {
e.getStackTrace();
}
}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html");
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>");
out.print(" This is ");
out.print(this.getClass());
out.println(", using the POST method");
out.println(" </BODY>");
out.println("</HTML>");
out.flush();
out.close();
}
/**
* Initialization of the servlet. <br>
*
* @throws ServletException if an error occure
*/
public void init() throws ServletException {
// Put your code here
}
}
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