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Commit feb3694

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Add initial project setup for TestJavaJDBC, including .gitignore, project configuration, and ConnectSQL class for database connection
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<?xml version="1.0" encoding="UTF-8"?>
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<classpath>
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<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-17">
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<attributes>
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<attribute name="module" value="true"/>
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</attributes>
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</classpathentry>
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<classpathentry kind="src" path="src"/>
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<classpathentry kind="lib" path="lib/mysql-connector-java-8.0.28.jar"/>
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<classpathentry kind="output" path="bin"/>
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</classpath>
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/bin/
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<?xml version="1.0" encoding="UTF-8"?>
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<projectDescription>
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<name>TestJavaJDBC</name>
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<comment></comment>
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<projects>
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</projects>
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<buildSpec>
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<buildCommand>
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<name>org.eclipse.jdt.core.javabuilder</name>
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<arguments>
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</arguments>
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</buildCommand>
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</buildSpec>
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<natures>
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<nature>org.eclipse.jdt.core.javanature</nature>
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</natures>
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</projectDescription>
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eclipse.preferences.version=1
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encoding/<project>=UTF-8
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eclipse.preferences.version=1
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org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabled
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org.eclipse.jdt.core.compiler.codegen.targetPlatform=17
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org.eclipse.jdt.core.compiler.codegen.unusedLocal=preserve
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org.eclipse.jdt.core.compiler.compliance=17
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org.eclipse.jdt.core.compiler.debug.lineNumber=generate
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org.eclipse.jdt.core.compiler.debug.localVariable=generate
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org.eclipse.jdt.core.compiler.debug.sourceFile=generate
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org.eclipse.jdt.core.compiler.problem.assertIdentifier=error
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org.eclipse.jdt.core.compiler.problem.enablePreviewFeatures=disabled
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org.eclipse.jdt.core.compiler.problem.enumIdentifier=error
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org.eclipse.jdt.core.compiler.problem.reportPreviewFeatures=warning
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org.eclipse.jdt.core.compiler.release=enabled
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org.eclipse.jdt.core.compiler.source=17
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package models;
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import java.security.PublicKey;
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import java.sql.*;
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public class ConnectSQL {
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public static Connection getConnection() {
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Connection conn = null;
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try{
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String userName = "root";
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String password = "";
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String DatabaseName = "websell";
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String url = "jdbc:mysql://localhost/" + DatabaseName;
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Class.forName("com.mysql.cj.jdbc.Driver");
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conn = DriverManager.getConnection(url, userName, password);
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System.out.println("Ok");
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} catch (Exception e) {
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// TODO: handle exception
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e.printStackTrace();
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}
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return conn;
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}
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public void showAll() {
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Connection conn = ConnectSQL.getConnection();
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String query = "SELECT * FROM users";
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PreparedStatement pstm = null;
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try {
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//Tạo đối tượng Statement
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pstm = conn.prepareStatement(query);
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//gán các giá trị vào tham số
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// pstm.setString(1, "ngoc");
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//Thực thi truy vấn và trả về đối tượng ResultSet
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ResultSet rs = pstm.executeQuery();
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//Duyệt kết quả trả về
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while (rs.next()){
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int id = rs.getInt("id");
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String username = rs.getString("phoneNumber");
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String password = rs.getString("password");
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String email = rs.getString("email");
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int role = rs.getInt("role");
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System.out.println(id + " - " + username + " - " + password + " - " + email + " " + role);
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}
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//Đóng kết nối
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// conn.close();
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} catch (SQLException e) {
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e.printStackTrace();
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}
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}
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public void insert() {
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Connection conn = ConnectSQL.getConnection();
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String query = "INSERT INTO users(id, username, password, email) " +
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"VALUES (null, ?,?,?)";
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PreparedStatement pstm = null;
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try {
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pstm = conn.prepareStatement(query);
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pstm.setString(1, "hung");
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pstm.setString(2, "123456789");
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pstm.setString(3, "hung@gmail.com");
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//Khi thực hiện các lệnh insert/update/delete sử dụng executeUpdate(), nó sẽ trả về số hàng bị tác động
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int row = pstm.executeUpdate();
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if(row != 0){
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System.out.println("Thêm thành công " + row);
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}
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//Đóng kết nối
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conn.close();
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} catch (SQLException e) {
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e.printStackTrace();
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}
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}
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public static void main(String[] args) {
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ConnectSQL connectSQL = new ConnectSQL();
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connectSQL.showAll();
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}
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}

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