Servlet 获取商品信息作业

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>表单</title>
</head>
<body>
<form action="tijiao" method="post">

添加商品信息：
<br><br>
商品名称:
<input type="text" id="name" name="name">
<br><br>
商品厂商：
<input type="text" id="changs" name="changs">
<br><br>
使用寿命:
<input type="text" id="shoum" name="shoum">
<br><br>
厂家地址:
<input type="text" id="dizhi" name="dizhi">
<br><br>
<input type="submit" value="提交">



</form>
</body>
</html>

index.html

package com.hanqi;

import java.io.IOException;
import javax.servlet.ServletConfig;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

/**
 * Servlet implementation class tijiao
 */
public class tijiao extends HttpServlet {
    private static final long serialVersionUID = 1L;
       String str = "";
    /**
     * @see HttpServlet#HttpServlet()
     */
    public tijiao() {
        super();
        // TODO Auto-generated constructor stub
    }

    /**
     * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
     */
    
    public void init(ServletConfig config) throws ServletException {
        
        str = config.getInitParameter("type");
        
        
        
    }
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        
        if(str.equals("1"))
        {
            response.setCharacterEncoding("GBK");
            
            String strName =new String(request.getParameter("name").getBytes("ISO-8859-1"),"UTF-8");
            
            String strChangs =new String(request.getParameter("changs").getBytes("ISO-8859-1"),"UTF-8");
            
            String strShoum =new String(request.getParameter("shoum").getBytes("ISO-8859-1"),"UTF-8");
            
            String strDizhi =new String(request.getParameter("dizhi").getBytes("ISO-8859-1"),"UTF-8");
            
            if(strName == null || strName.trim().length() ==0)
            {
                response.getWriter().append("商品名称不能为空");
            }
            else if(strChangs == null || strChangs.trim().length() ==0)
            {
                response.getWriter().append("商品厂商不能为空");
            }
            else if(strShoum == null || strShoum.trim().length() ==0)
            {
                response.getWriter().append("使用寿命不能为空");
            }
            else if(strDizhi == null || strDizhi.trim().length() ==0)
            {
                response.getWriter().append("厂家地址不能为空");
            }
            else
            {

                response.getWriter().append("商品名称:" + strName );
                response.getWriter().append("<br>商品厂商:" +strChangs);
                response.getWriter().append("<br>使用寿命:" +strShoum);
                response.getWriter().append("<br>厂家地址:" +strDizhi);
                
            }
        
        
        //response.getWriter().append("Served at: asd ").append(request.getContextPath()).append(str);
    }
    else
    {
        response.getWriter().append("Served at:123 ").append(str);
    }
    
    }
    /**
     * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
     */
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        // TODO Auto-generated method stub
        doGet(request, response);
    }

}

tijiao.java