版权声明:http://www.cnblogs.com/gis-laozhang/p/7079992.html
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需求:Android客户端连接服务器端mysql数据库中的内容
环境部署
服务器:apache-tomcat-8.5.9
语言版本:Java 1.8.0_101
编译环境:Eclipse
Android Studio
调用jar包:httpclient-4.2.5,httpcore-4.2.4 //HttpClient父类
mysql-connector-java-5.1.40-bin //用于连接mysql数据库
思路:涉及到服务器端mysql数据库安装、web应用部分开发和Android客户端开发三个部分
步骤:
1、mysql数据库安装
a、先安装mysql-installer-community-5.7.17.0,其中在Setup Type上选择“Server only”,然后记住数据库端口号和账号(例如:root)密码(例如:123456),如下图:
b、安装成功验证。命令行窗口输入密码,然后输入显示所有数据库命令:show databases; 一定要有分号,并按回车。
c、NavicatforMySQL下载及使用。注册,然后连接数据库,输入密码后,能够看到已存在的数据库,可以在其中进行相关数据库和数据表的创建操作。
(具体以参考资料中的内容为主)
2、web应用部分开发
a、新建servlet,并且配置好web.xml中的相应信息(在WebContent下的WEB-INF文件夹下加入web.xml文件来连接servlet与jsp前端),此外还需在libs中添加mysql-connector-java-5.1.37-bin.jar文件,代码如下:
1 package com.Servlet; 2 3 import java.io.IOException; 4 import javax.servlet.ServletException; 5 import javax.servlet.annotation.WebServlet; 6 import javax.servlet.http.HttpServlet; 7 import javax.servlet.http.HttpServletRequest; 8 import javax.servlet.http.HttpServletResponse; 9 10 import java.io.PrintWriter;11 import java.sql.Connection;12 import java.sql.ResultSet;13 import java.sql.Statement;14 import com.DBTool.DBUtil;15 16 @WebServlet("/Servlet")17 public class Login extends HttpServlet {18 private static final long serialVersionUID = 1L;19 20 /**21 * @see HttpServlet#HttpServlet()22 */23 public Login() {24 super();25 // TODO Auto-generated constructor stub26 }27 /**28 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)29 */30 protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {31 // TODO Auto-generated method stub32 response.getWriter().append("Served at: ").append(request.getContextPath());33 }34 35 /**36 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)37 */38 protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {39 String ID = request.getParameter("ID"); 40 String PW= request.getParameter("PW");41 boolean type=false;42 response.setContentType("text/html; charset=UTF-8");43 PrintWriter out = response.getWriter();44 try45 {46 Connection con=DBUtil.getConnection();47 Statement stmt=con.createStatement();48 //mysql数据库中的数据表,表名叫:demotable ,需要自己预先在数据库中进行创建,包含相应的字段和记录。49 String sql="select * from mysql.demotable where uid="+ID+" and pwd="+PW;50 ResultSet rs=stmt.executeQuery(sql);51 while(rs.next())52 {53 type=true;54 }55 }56 catch(Exception ex)57 {58 ex.printStackTrace();59 }60 finally61 {62 DBUtil.Close();63 out.print(type);64 out.flush();65 out.close();66 }67 }68 69 }
web.xml内容如下:
1 23 web 45 9Login 6Login 7com.Servlet.Login 810 13Login 11/Login 1214 17index.html 15index.jsp 16
b、前端界面设计(TestPage.jsp)如下:
1 <%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> 2 3 4 5 616 17Insert title here 7 8 9
c、在java Resources下的src文件夹中新建com.DBTool包,用作数据池来连接数据库,在包中建立DBUtil类实现功能,代码如下:
1 package com.DBTool; 2 3 4 import java.sql.*; 5 6 public class DBUtil { 7 //其中mysql是数据库名称,在mysql57版本的数据库中已经预先新建完成;3306是mysql数据库的端口号。 8 private static String url="jdbc:mysql://localhost:3306/mysql"; 9 //com.mysql.jdbc.Driver是mysql-connector-java-5.1.40中的驱动包路径10 private static String driverClass="com.mysql.jdbc.Driver";11 //mysql的账号和密码是在安装mysql中进行设置的,这里拿来用即可。12 private static String username="root";13 private static String password="123456";14 private static Connection conn;15 //装载驱动16 static{17 try{18 Class.forName(driverClass);19 }20 catch(ClassNotFoundException e){21 e.printStackTrace();22 }23 }24 //获取数据库连接25 public static Connection getConnection(){26 try{27 conn=DriverManager.getConnection(url,username,password);28 }29 catch(SQLException e){30 e.printStackTrace();31 }32 return conn;33 }34 //建立数据库连接35 public static void main(String[] args){36 Connection conn=DBUtil.getConnection();37 if(conn!=null){38 System.out.println("数据库连接成功");39 }40 else{41 System.out.println("数据库连接失败");42 }43 }44 //关闭数据库连接45 public static void Close(){46 if(conn!=null){47 try{48 conn.close();49 }50 catch(SQLException e){51 e.printStackTrace();52 }53 }54 }55 }
d、运行服务器,测试是否成功搭建。
3、Android部分开发
仅附上核心部分代码,如下:
1 public void SendByHttpClient(final String id, final String pw){ 2 new Thread(new Runnable() { 3 @Override 4 public void run() { 5 try { 6 HttpClient httpclient=new DefaultHttpClient(); 7 HttpPost httpPost=new HttpPost("http://web应用部署服务器上的IP地址:8080/HttpClientDemo/Login");//服务器地址,指向Servlet 8 Listparams=new ArrayList ();//将id和pw装入list 9 params.add(new BasicNameValuePair("ID",id)); 10 params.add(new BasicNameValuePair("PW",pw)); 11 final UrlEncodedFormEntity entity=new UrlEncodedFormEntity(params,"utf-8");//以UTF-8格式发送 12 httpPost.setEntity(entity); 13 HttpResponse httpResponse= httpclient.execute(httpPost); 14 if(httpResponse.getStatusLine().getStatusCode()==200)//在200毫秒之内接收到返回值 15 { 16 HttpEntity entity1=httpResponse.getEntity(); 17 String response=EntityUtils.toString(entity1, "utf-8");//以UTF-8格式解析 18 Message message=new Message(); 19 message.what=USER_LOGIN; 20 message.obj=response; 21 handler.sendMessage(message);使用Message传递消息给线程 22 } 23 } 24 catch (Exception e) { 25 e.printStackTrace(); 26 } 27 } 28 }).start(); 29 }
最终,测试结果图,如下:
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参考资料:
http://transcoder.tradaquan.com/from=1017649e/bd_page_type=1/ssid=0/uid=0/pu=usm%401%2Csz%401320_2001%2Cta%40iphone_1_9.2_3_601/baiduid=3B77D44CFFB44688FD602EAD8A663022/w=0_10_/t=iphone/l=3/tc?ref=www_iphone&lid=9684581900815139314&order=2&fm=alhm&h5ad=1&srd=1&dict=32&tj=h5_mobile_2_0_10_title&w_qd=IlPT2AEptyoA_ykzv39b7vOxASxPcYSfDwWEKKelwb6TYslhS_&sec=22021&di=4d89010ccd0ca0f7&bdenc=1&tch=124.133.103.675.1.561&nsrc=IlPT2AEptyoA_yixCFOxXnANedT62v3IEQGG_ytK1DK6mlrte4viZQRAUSD8L7qYZpPPtCPQpxkCwnWh_7YskNYWgK&eqid=86668bed7c43800010000003594fbeac&wd=&clk_info=%7B%22srcid%22%3A%221599%22%2C%22tplname%22%3A%22h5_mobile%22%2C%22t%22%3A1498398423079%2C%22sig%22%3A%2242687%22%2C%22xpath%22%3A%22div-a-h3%22%7D
//MySQL数据库安装与配置详解
http://blog.csdn.net/qq_14923661/article/details/50461696 // Android平台实现与Apache Tomcat服务器数据交互(MySql数据库)