addnewreader.java

JAVA的MVC三层开发的图书馆管理系统。

package mypackage;
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.PrintWriter;
import java.io.IOException;
import java.sql.*;
import javax.sql.DataSource;

public class AddNewReader extends HttpServlet 
{
  private static final String CONTENT_TYPE = "text/html; charset=GBK";

  public void init(ServletConfig config) throws ServletException
  {
    super.init(config);
  }

  public void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
  {
    response.setContentType(CONTENT_TYPE);
    request.setCharacterEncoding("GBK");  
    String readerID = request.getParameter("readerID");
    String readerName = request.getParameter("readerName");
    int sex = Integer.parseInt(request.getParameter("sex"));
    String maxnum = request.getParameter("maxnum");
    String regdate = new FormatDate().nowDate();
    int success = 0;
    DataSource ds = null;
    Connection conn = null;
    PreparedStatement pstm = null;
    
    try{
      ds = (DataSource)request.getSession().getServletContext().getAttribute("DataSrc");
      conn = ds.getConnection();
      pstm = conn.prepareStatement("insert into reader(readerid,readername,sex,regdate,maxnum) values(?,?,?,?,?)");
      pstm.setString(1,readerID);
      pstm.setString(2,readerName);
      pstm.setInt(3,sex);
      pstm.setString(4,regdate);
      pstm.setString(5,maxnum);
      success = pstm.executeUpdate();
      pstm.close();
      conn.close();
    }
    catch(Exception e){
      System.out.println(e.getMessage());
    }

    if(success > 0)
      request.getSession().getServletContext().getRequestDispatcher("Seccess.jsp").forward(request, response);
    else
      request.getSession().getServletContext().getRequestDispatcher("Fail.jsp").forward(request, response);
  }
}