1、所有数据渲染浏览器
import javax.jws.WebService; 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.io.PrintWriter; import java.sql.*; @WebServlet("/sss") public class GetDateServlet extends HttpServlet { @Override protected void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { resp.setCharacterEncoding("UTF-8"); resp.setContentType("text/html;charset=utf8"); PrintWriter out = resp.getWriter(); Connection conn=null; Statement stm=null; ResultSet rs=null; String date=""; try { Class.forName("org.sqlite.JDBC"); conn= DriverManager.getConnection("jdbc:sqlite:D:/sqlite/date/Student.sqlite"); stm=conn.createStatement(); rs=stm.executeQuery("select name,score,id from StuInfo"); while (rs.next()){ date+="<tr><td>"+rs.getString(1)+"</td><td>"+rs.getInt(2)+ "</td><td class='del'><a href='/test_war_exploded/del?id=" +rs.getInt(3)+"'>删除</a></td></tr>"; } }catch (Exception e){ e.printStackTrace(); }finally { try { if (rs!=null) rs.close(); if (stm!=null) stm.close(); if (conn!=null) conn.close(); }catch (SQLException e){ e.printStackTrace(); } } out.println("<html>"); out.println("<head>"); out.println("<style>"); out.println("table{border-collapse:collapse;300px;margin:auto;text-align:center;}"); out.println("table,tr,th,td{border:1px solid #000}"); out.println("</style>"); out.println("</head>"); out.println("<body>"); out.println("<table>"); out.println(date); out.println("</table>"); out.println("<script>"); out.println("<script>"); out.println("</body>"); out.println("</html>"); } }
2、根据提交方式获取id然后删除数据库
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.sql.*; @WebServlet("/del") public class DelServlet extends HttpServlet { @Override protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { String id=req.getParameter("id"); Connection conn=null; Statement stm=null; try { Class.forName("org.sqlite.JDBC"); conn= DriverManager.getConnection("jdbc:sqlite:D:/sqlite/date/Student.sqlite"); stm=conn.createStatement(); stm.executeUpdate("delete from StuInfo where id="+id); }catch (Exception e){ e.printStackTrace(); }finally { try { if (stm!=null) stm.close(); if (conn!=null) conn.close(); }catch (SQLException e){ e.printStackTrace(); } } req.getRequestDispatcher("/sss").forward(req,resp); } @Override protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { } }
3、完成，运行