1 add.jsp代码
<%@ page language="java" pageEncoding="UTF-8"%> <HTML> <HEAD> <meta http-equiv="Content-Language" content="zh-cn"> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <LINK href="${pageContext.request.contextPath}/css/Style1.css" type="text/css" rel="stylesheet"> <script type="text/javascript" src="${pageContext.request.contextPath }/js/jquery-1.11.3.min.js"></script> <script type="text/javascript"> $(function(){ //页面加载完毕后异步获得分类数据 $.post( "${pageContext.request.contextPath }/admin?method=findAllCategory", function(data){ //[{"cid":"xxx","cname":"xxx"},{},{}] //拼接多个<option value=""></option> var content=""; for(var i=0;i<data.length;i++){ content += "<option value='"+data[i].cid+"'>"+data[i].cname+"</option>"; } $("#cid").html(content); }, "json" ); }); </script> </HEAD> <body> <!-- --> <form id="userAction_save_do" name="Form1" action="${pageContext.request.contextPath}/adminProduct_save.action" method="post" enctype="multipart/form-data"> <table cellSpacing="1" cellPadding="5" width="100%" align="center" bgColor="#eeeeee" style="border: 1px solid #8ba7e3" border="0"> <tr> <td class="ta_01" align="center" bgColor="#afd1f3" colSpan="4" height="26"> <strong><STRONG>添加商品</STRONG> </strong> </td> </tr> <tr> <td width="18%" align="center" bgColor="#f5fafe" class="ta_01"> 商品名称： </td> <td class="ta_01" bgColor="#ffffff"> <input type="text" name="pname" value="" id="userAction_save_do_logonName" class="bg"/> </td> <td width="18%" align="center" bgColor="#f5fafe" class="ta_01"> 是否热门： </td> <td class="ta_01" bgColor="#ffffff"> <select name="is_hot"> <option value="1">是</option> <option value="0">否</option> </select> </td> </tr> <tr> <td width="18%" align="center" bgColor="#f5fafe" class="ta_01"> 市场价格： </td> <td class="ta_01" bgColor="#ffffff"> <input type="text" name="market_price" value="" id="userAction_save_do_logonName" class="bg"/> </td> <td width="18%" align="center" bgColor="#f5fafe" class="ta_01"> 商城价格： </td> <td class="ta_01" bgColor="#ffffff"> <input type="text" name="shop_price" value="" id="userAction_save_do_logonName" class="bg"/> </td> </tr> <tr> <td width="18%" align="center" bgColor="#f5fafe" class="ta_01"> 商品图片： </td> <td class="ta_01" bgColor="#ffffff" colspan="3"> <input type="file" name="upload" /> </td> </tr> <tr> <td width="18%" align="center" bgColor="#f5fafe" class="ta_01"> 所属分类： </td> <td class="ta_01" bgColor="#ffffff" colspan="3"> <select id="cid" name="cid"> </select> </td> </tr> <tr> <td width="18%" align="center" bgColor="#f5fafe" class="ta_01"> 商品描述： </td> <td class="ta_01" bgColor="#ffffff" colspan="3"> <textarea name="pdesc" rows="5" cols="30"></textarea> </td> </tr> <tr> <td class="ta_01" style="WIDTH: 100%" align="center" bgColor="#f5fafe" colSpan="4"> <button type="submit" id="userAction_save_do_submit" value="确定" class="button_ok"> 确定 </button> <FONT face="宋体"> </FONT> <button type="reset" value="重置" class="button_cancel">重置</button> <FONT face="宋体"> </FONT> <INPUT class="button_ok" type="button" onclick="history.go(-1)" value="返回"/> <span id="Label1"></span> </td> </tr> </table> </form> </body> </HTML>
2 AdminServlet代码
package www.test.web.servlet; import java.io.IOException; import java.util.List; import javax.servlet.ServletException; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import com.google.gson.Gson; import www.test.domain.Category; import www.test.service.AdminService; public class AdminServlet extends BaseServlet { // 1 页面加载完毕后异步获得分类数据 public void findAllCategory(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { //提供一个List<Category>转成json字符串 AdminService service = new AdminService(); List<Category> categoryList = service.findAllCategory(); //将List<Category>转换成json格式 Gson gson = new Gson(); String json = gson.toJson(categoryList); //解决乱码并写出 response.setContentType("text/html;charset=UTF-8"); response.getWriter().write(json); } }
3 AdminService代码
package www.test.service; import java.sql.SQLException; import java.util.List; import www.test.dao.AdminDao; import www.test.domain.Category; public class AdminService { // 获取分类 public List<Category> findAllCategory() { AdminDao dao = new AdminDao(); try { return dao.findAllCategory(); } catch (SQLException e) { e.printStackTrace(); return null; } } }
4 AdminDao代码
package www.test.dao; import java.sql.SQLException; import java.util.List; import org.apache.commons.dbutils.QueryRunner; import org.apache.commons.dbutils.handlers.BeanListHandler; import www.test.domain.Category; import www.test.utils.C3P0Utils; public class AdminDao { // 获取分类 public List<Category> findAllCategory() throws SQLException { QueryRunner qr = new QueryRunner(C3P0Utils.getDataSource()); String sql = "select * from category"; return qr.query(sql, new BeanListHandler<Category>(Category.class)); } }