IDEA連接MySQL數(shù)據(jù)庫，并把數(shù)據(jù)庫數(shù)據(jù)在瀏覽器中進(jìn)行展示

發(fā)表時(shí)間：2019-9-24

發(fā)布人：葵宇科技

瀏覽次數(shù)：86

在進(jìn)行項(xiàng)目創(chuàng)建之前，先要確保本地有以下軟件：

1、MySQL以及Navicat，作者這里用的是MySQL5.7

2、 IDEA

3、MySQL的驅(qū)動(dòng)，作者這里用的是mysql-connector-java-8.0.17.jar

4、Tomcat

1、新建項(xiàng)目

勾選Java EE的Web Application和Create web.xml，繼續(xù)next

給項(xiàng)目命名并選擇存儲(chǔ)路徑，然后Finish

到這一步項(xiàng)目新建成功

2、進(jìn)行項(xiàng)目配置

1）點(diǎn)擊File->Project Structure

（2）左側(cè)選擇Project，右側(cè)配置好SDK，然后點(diǎn)擊OK

（3）在WEB-INF下新建兩個(gè)文件夾，分別是classe和lib，并把mysql-connector-java-8.0.17.jar放入lib文件夾下

（4）點(diǎn)擊File->Project Structure->Modules，點(diǎn)擊右側(cè)的Paths，選擇Use module compile output push，將Output path和Test out path都改成剛才建立的classes的路徑，改好后點(diǎn)擊Apply。

（5）點(diǎn)擊File->Project Structure->Modules，點(diǎn)擊右側(cè)的Dependencies，之后點(diǎn)擊右側(cè)的+號(hào)，選擇JARS or directories，然后找到Jar包并選擇，點(diǎn)擊Apply

然后再選擇+號(hào)，選擇Library，彈框選擇Tomcat，點(diǎn)擊Add Selected。返回上一頁面，點(diǎn)擊OK

（6）配置tomcat
點(diǎn)擊Run -> 選擇Edit Configurations
在這里插入圖片描述

點(diǎn)擊+號(hào) -> 選擇Tomcat Server -> 選擇Local

在Name處輸入新的服務(wù)名，點(diǎn)擊Application server后面的Configure…，彈出Tomcat Server窗口，選擇本地安裝的Tomcat目錄，選擇HTTP port和JMX port（默認(rèn)值即可），然后點(diǎn)擊右下角的Fix，

擊Fix后出現(xiàn)如下界面，對(duì)下面的Application context進(jìn)行編輯，編輯好之后點(diǎn)擊OK

3、把代碼寫進(jìn)jsp文件運(yùn)行

<%@ page import="java.sql.Statement" %>
<%@ page import="java.sql.ResultSet" %>
<%@ page import="java.sql.Connection" %>
<%@ page import="java.sql.DriverManager" %><%--
  Created by IntelliJ IDEA.
  User: Administrator
  Date: 2019/9/24
  Time: 9:30
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
  <head>
    <title>$Title$</title>
  </head>
  <body>
  -%>
  <%@ page contentType="text/html;charset=UTF-8" language="java" %>
  <html>
  <head>
    <title>mysql測(cè)試</title>
  </head>
  <body>
  -%>
  <%@ page contentType="text/html;charset=UTF-8" language="java" %>
  <html>
  <head>
    <title>mysql測(cè)試</title>
  </head>
  <body>

  <%
    try {
      Class.forName("com.mysql.jdbc.Driver");  加載數(shù)據(jù)庫驅(qū)動(dòng)
      String url = "jdbc:MySQL://localhost:3306/sqltest?&useSSL=false&serverTimezone=UTC"; //指向數(shù)據(jù)庫table
      String username = "root";  //數(shù)據(jù)庫用戶名
      String password = "123456zyx";  //數(shù)據(jù)庫用戶密碼
      Connection conn = DriverManager.getConnection(url, username, password);  
      if(conn != null){
        out.print("數(shù)據(jù)庫連接成功！");
        out.println("<br />");
        out.println("-------------------------------");
        out.print("<br />");
        Statement stmt = null;
        ResultSet rs = null;
        String sql ="select * from sqltest";  //查詢語句
        stmt = conn.createStatement();
        rs = stmt.executeQuery(sql);
        out.println("執(zhí)行結(jié)果如下所示:");
        out.println("<br />");
        out.println("-------------------------------");
        out.println("<br />");
        out.println("姓名" + "\t" + "電話"+"\t"+"職位"+"\t");
        out.println("<br />");
        while (rs.next()) {
          out.println(rs.getString("name")+"   &nbsp  "+rs.getString("Tel")+"  &nbsp "+rs.getString("position")+"  &nbsp "); //將數(shù)據(jù)庫表格查詢結(jié)果輸出
          out.print("<br />");
        }
      }
      else{
        out.print("連接失敗！");
      }
    }
    catch (Exception e) {
      out.print("數(shù)據(jù)庫連接異常！");
    }
  %>
  </body>
</html>

運(yùn)行結(jié)果如圖所示：