itemservlet.java

通过jsp/servlet实现web打印

package servlet;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.Enumeration;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import bean.ShowReceiptItem;

public class ItemServlet extends HttpServlet {
	
	/**
	 * 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();
			request.setCharacterEncoding("GBK");
			response.setCharacterEncoding("GBK");
			String newparName[] = new String[3];
			boolean boo = true;
			boolean allboo = true;
			for(int n=0;n<newparName.length;n++){
				newparName[n]="";
			}
			ShowReceiptItem sri = new ShowReceiptItem ();
			Enumeration e = (Enumeration)request.getParameterNames();
			while(e.hasMoreElements()){
				String parName=(String)e.nextElement();
					if(!(parName.equals("id"))){
						if(parName.contains("new")){
								for(int i =0 ;i<3;i++){
									if(newparName[i].equals("")){
										newparName[i]= request.getParameter(parName);
										break;
									}	
								}
		
						}else{
							String parvalue = request.getParameter(parName);
							String[] parNames = parName.split("_");
							int id = Integer.valueOf(parNames[1]);
							allboo|=sri.execSqlUpdata(id, parNames[0], parvalue);
						} 
						
			}else{
					String id = request.getParameter(parName);
							allboo|=sri.execDelectdata(id);	
							}			
	}
			
			for(int j=0;j<newparName.length;j++){
				if(newparName[j].length()>0){
					boo |= true;
				}else{
					boo=false;
					
				}
			}
			
			if(boo){
				allboo |=sri.execInsetdata(newparName[0],newparName[1],newparName[2]);
			}
			if(allboo){
				out.println("<script language='javascript'>alert('保存成功！');"+
	             "parent.mainFrame.location.href='printf/receiptItem.jsp';</script>");
				
			}
			out.close();
			this.destroy();
}

	/**
	 * 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 {

		response.setContentType("text/html;charset=GBK");
		this.doGet(request, response);
	}

}