标签:block image remove === lex 测试 加载 dom not
直接上代码:
这里我使用mybatis框架的逆反工程:
所以我这里省略了pojo dao 以及 dao的对应接口
需要util工具(也可以自己写):
package cn.util; import org.apache.ibatis.io.Resources; import org.apache.ibatis.session.SqlSession; import org.apache.ibatis.session.SqlSessionFactory; import org.apache.ibatis.session.SqlSessionFactoryBuilder; import java.io.IOException; import java.io.InputStream; public class MyBatisUtil { private static SqlSessionFactory factory; static{//在静态代码块下,factory只会被创建一次 System.out.println("static factory==============="); try { InputStream is = Resources.getResourceAsStream("mybatis-config.xml"); factory = new SqlSessionFactoryBuilder().build(is); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } public static SqlSession createSqlSession(){ return factory.openSession(false);//true 为自动提交事务 } public static void closeSqlSession(SqlSession sqlSession){ if(null != sqlSession) sqlSession.close(); } }
Service层:
package cn.service; import cn.pojo.Img; import java.util.List; public interface ImgMapperService { List<Img> selectAll(); }
package cn.service; import cn.dao.ImgMapper; import cn.pojo.Img; import cn.util.MyBatisUtil; import org.apache.ibatis.session.SqlSession; import java.util.List; public class ImgMapperServiceImpl implements ImgMapperService { private static final SqlSession sqlSession = MyBatisUtil.createSqlSession(); private static final ImgMapper mapper = sqlSession.getMapper(ImgMapper.class); public List<Img> selectAll() { List<Img> imgs = mapper.selectAll(); return imgs; } }
Servlet层:
package cn.servlet; import cn.dao.ImgMapper; import cn.pojo.Img; import cn.service.ImgMapperService; import cn.service.ImgMapperServiceImpl; import cn.util.MyBatisUtil; import com.google.gson.Gson; import org.apache.ibatis.session.SqlSession; import javax.servlet.ServletException; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import java.io.IOException; import java.util.List; @WebServlet("/Servlet01") public class Servlet01 extends HttpServlet { ImgMapperService imgMapperService = new ImgMapperServiceImpl(); @Override protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { resp.setContentType("text/html;charset=UTF-8"); Gson gson = new Gson(); List<Img> imgs = imgMapperService.selectAll(); System.out.println(gson.toJson(imgs)); resp.getWriter().println(gson.toJson(imgs)); } @Override protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { super.doPost(req, resp); } }
Web方面: 需要准备 img 以及路径
index.jsp:
<%-- Created by IntelliJ IDEA. User: admin Date: 2019/10/27 Time: 21:40 To change this template use File | Settings | File Templates. --%> <%@ page contentType="text/html;charset=UTF-8" language="java" %> <html> <head> <title>测试</title> <%-- <script src="js/jquery.min.js"></script>--%> <script src="js/jquery.min.js"></script> <script> $(function () { $("#bto1").click(function () { alert("aaa") $("#bto1").remove(); $.ajax({ type: "Get", dataType: "json", url: "Servlet01", data: "userName="+Math.random(), success: function(data){ $.each(data,function (i,val) { // alert(data[i].url) $("#b").html(data[i].url) }) }, error: function(msg){ alert("请联系客户") } }) }) }) </script> <style> .bto1{ width: 340px; height: 340px; display: flex; border-radius: 50%; align-items: center; justify-content: center; overflow: hidden; } </style> </head> <body> <div id="bto1"class="bto1"> <img src="img/d2.png" alt="第二张"/> </div> <div id="b"class="bto1"></div> </body> </html>
注意: 这里的图片经常在加载时会出错,所以最好先弄一个jsp文件然后把图片测试一遍
正确的路径存入数据库:
数据库:
标签:block image remove === lex 测试 加载 dom not
原文地址:https://www.cnblogs.com/bichen-01/p/11749845.html