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- package com.myWeb.user;
- /**
- * 使用MVC模式
- * 是User一个类,封装User的属性
- * @author user32
- *
- */
- public class User {
- private String name;
- private int sex;
- private int age;
- private String phone;
- private String qq;
- public User(){super();}
- public User(String name,int sex,int age,
- String phone,String qq){
- this.name = name;
- this.sex = sex;
- this.age = age;
- this.phone = phone;
- this.qq = qq;
- }
- public String getName() {
- return name;
- }
- public void setName(String name) {
- this.name = name;
- }
- public int getSex() {
- return sex;
- }
- public void setSex(int sex) {
- this.sex = sex;
- }
- public int getAge() {
- return age;
- }
- public void setAge(int age) {
- this.age = age;
- }
- public String getPhone() {
- return phone;
- }
- public void setPhone(String phone) {
- this.phone = phone;
- }
- public String getQq() {
- return qq;
- }
- public void setQq(String qq) {
- this.qq = qq;
- }
- public String toString(){
- return "user[name="+name+";sex="+sex+
- ";age="+age+";phone="+phone+";qq="+
- qq+"]";
- }
- }
刚学习JavaEE,有不对的地方请指出
----------------------------------------------------
代码上次有错误,这次修改,没有优化
----------------------------------------------------
想实现一个简单的web功能,安静数据库(mysql)里面的表的内容显示在html上。
1、准备工作
安装myeclipse(对JavaEE开发比较方便),tomcat插件,mysql数据库,Navicat(方便管理mysql数据库)
这些安装网上有很多教程,可自行百度
2、想实现这个功能,百度下很多方法如
Ajax:http://www.cnblogs.com/lansehai/p/4668917.html
mvc模式:http://www.cnblogs.com/lxnlxn/p/5813981.html
php :http://blog.csdn.net/xtqueen/article/details/8219002 这里参照mvc模式
3、在数据库中建立一个简单的表
语句:
create table userT
-> (id INT NOT NULL AUTO_INCREMENT,
-> name VARCHAR(30) NOT NULL,
-> sex int(1),
-> age int(2),
-> phone VARCHAR(11) NOT NULL,
-> qq VARCHAR(15),
-> PRIMARY KEY(id));
4、写一个简单的html文件
MyHtml.html rel="stylesheet" type="text/css" href="./css/base.css"/> 姓名性别年龄手机QQ操作name男11150604051101374465900 name男11150604051101374465900 name男11150604051101374465900
- body{
- border:0px ;
- padding:0px;
- margin:0px;
- /*background-image: url(../web/body_bg.jpg);
- background-repeat: repeat-x;*/
- }
- div{
- border:1px solid black;
- margin:0px auto;
- }
- #showData{
- margin:0 auto;
- border-collapse: collapse;
- width: 800px;
- text-align: center;
- font-size: 16px;
- }
- tr.header{
- height:40px;
- font-weight:bold;
- }
- #showData td{
- border:1px solid black;
- height:30px;
- margin:0
- }
- package com.myWeb.user;
- /**
- * 使用MVC模式
- * 是User一个类,封装User的属性
- * @author user32
- *
- */
- public class User {
- private String name;
- private int sex;
- private int age;
- private String phone;
- private String qq;
- public User(){super();}
- public User(String name,int sex,int age,
- String phone,String qq){
- this.name = name;
- this.sex = sex;
- this.age = age;
- this.phone = phone;
- this.qq = qq;
- }
- public String getName() {
- return name;
- }
- public void setName(String name) {
- this.name = name;
- }
- public int getSex() {
- return sex;
- }
- public void setSex(int sex) {
- this.sex = sex;
- }
- public int getAge() {
- return age;
- }
- public void setAge(int age) {
- this.age = age;
- }
- public String getPhone() {
- return phone;
- }
- public void setPhone(String phone) {
- this.phone = phone;
- }
- public String getQq() {
- return qq;
- }
- public void setQq(String qq) {
- this.qq = qq;
- }
- public String toString(){
- return "user[name="+name+";sex="+sex+
- ";age="+age+";phone="+phone+";qq="+
- qq+"]";
- }
- }
- package com.myWeb.DAO;
-
- import java.sql.Connection;
- import java.sql.DriverManager;
- import java.sql.ResultSet;
- import java.sql.SQLException;
- import java.sql.Statement;
- import java.util.ArrayList;
- import java.util.List;
-
- import com.myWeb.user.User;
-
- /**
- * User的DAO类
- * 实现数据库的连接;数据库的查询
- * @author user32
- *
- */
- public class UserDAO {
- private static Connection conn=null;
- /**
- * 连接数据库的相关信息
- */
- private static String driver = "com.mysql.jdbc.Driver";
- private static String url = "jdbc:mysql://127.0.0.1:3306/myweb";
- private static String user = "root";
- private static String password = "105092014032";
- /**
- * 连接数据库
- */
- public static void getConnect(){
- try {
- Class.forName(driver);
- conn = DriverManager.getConnection(url, user, password);
- } catch (Exception e) {
- System.out.println("数据库连接失败");
- e.printStackTrace();
- }
- }
- /**
- * 关闭数据库
- */
- public static void closeConnect(){
- if (conn==null){
- return;
- }
- try{
- conn.close();
- }catch (SQLException e) {
- System.out.println("关闭数据库失败");
- e.printStackTrace();
- }
- }
- public static List
-
-
-
- getUsers(){
- if (conn==null){return null;}
- List
-
-
-
- lists = new ArrayList
-
-
-
- ();
- /*PreparedStatement会对sql语句进行检查,多语句
- * 进行批处理。相对于Statement比较安全。一般在开发使用
- * PreparedStatement
- * PreparedStatement preparedStatement = null;
- * 在改方法中只查询一次,使用Statement
- */
- Statement state = null;
- ResultSet rs = null;
- String sql = "SELECT t_name,sex,age,phone,qq" +
- "FROM userT";
- sql = "select * from usert";
- User user = new User();
- try {
- state = conn.createStatement();
- rs = state.executeQuery(sql);
- while (rs.next()){
- System.out.println(rs.getString("t_name"));
- user.setName(rs.getString("t_name"));
- user.setSex(rs.getInt("sex"));
- user.setAge(rs.getInt("age"));
- user.setPhone(rs.getString("phone"));
- user.setQq(rs.getString("qq"));
- lists.add(user);
- }
- } catch (Exception e) {
- lists = null;
- e.printStackTrace();
- }
- return lists;
- }
- }
-
-
-
-
-
-
- package com.myWeb.DAO;
-
- import java.sql.Connection;
- import java.sql.DriverManager;
- import java.sql.ResultSet;
- import java.sql.SQLException;
- import java.sql.Statement;
- import java.util.ArrayList;
- import java.util.List;
-
- import com.myWeb.user.User;
-
- /**
- * User的DAO类
- * 实现数据库的连接;数据库的查询
- * @author user32
- *
- */
- public class UserDAO {
- private static Connection conn=null;
- /**
- * 连接数据库的相关信息
- */
- private static String driver = "com.mysql.jdbc.Driver";
- private static String url = "jdbc:mysql://127.0.0.1:3306/myweb?" +
- "useUnicode=true&characterEncoding=UTF-8";
- private static String user = "root";
- private static String password = "105092014032";
- /**
- * 连接数据库
- */
- public static void getConnect(){
- try {
- Class.forName(driver);
- conn = DriverManager.getConnection(url, user, password);
- } catch (Exception e) {
- System.out.println("数据库连接失败");
- e.printStackTrace();
- }
- }
- /**
- * 关闭数据库
- */
- public static void closeConnect(){
- if (conn==null){
- return;
- }
- try{
- conn.close();
- }catch (SQLException e) {
- System.out.println("关闭数据库失败");
- e.printStackTrace();
- }
- }
- public static List
-
-
-
- getUsers(){
- if (conn==null){
- UserDAO.getConnect();
- }
- List
-
-
-
- lists = new ArrayList
-
-
-
- ();
- /*PreparedStatement会对sql语句进行检查,多语句
- * 进行批处理。相对于Statement比较安全。一般在开发使用
- * PreparedStatement
- * PreparedStatement preparedStatement = null;
- * 在改方法中只查询一次,使用Statement
- */
- Statement state = null;
- ResultSet rs = null;
- //这个t_name字段好像有点问题
- // String sql = "SELECT t_name,sex,age,phone,qq" +
- // "FROM userT";
- String sql = "select * from usert";
- try {
- state = conn.createStatement();
- rs = state.executeQuery(sql);
- while (rs.next()){
- /*User user = new User();
- //System.out.println(rs.getString("t_name"));
- user.setName(rs.getString("t_name"));
- user.setSex(rs.getInt("sex"));
- user.setAge(rs.getInt("age"));
- user.setPhone(rs.getString("phone"));
- user.setQq(rs.getString("qq"));*/
- lists.add(new User(rs.getString("t_name"),
- rs.getInt("sex"),
- rs.getInt("age"),
- rs.getString("phone"),
- rs.getString("qq")));
- }
- try {
- rs.close();
- state.close();
- } catch (SQLException e) {
- e.printStackTrace();
- }
- } catch (Exception e) {
- lists = null;
- e.printStackTrace();
- }finally{
- //UserDAO.closeConnect();
- }
- //System.out.println("测试lists:"+lists);
- return lists;
- }
- }
-
-
-
-
-
-
最后截图。不过按钮不能使用,可以在servlet中接受继续添加功能,应该可以实现(也是刚学,不是很清楚)
前面是由于编码问题导致乱码,不过询问老师,终于改过来,所以最后一个正常显示
其中遇到一个mysql乱码问题:可以去http://blog.csdn.net/shawshank_bingo/article/details/52579526
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