添加 'src/src'

src/src

@@ -0,0 +1,175 @@
+package com.src.utils;
+
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+
+/**
+ * 
+ *
+ */
+public class Sqltools {
+
+
+	private static Connection cnn = null;
+	private static PreparedStatement ps = null;
+	private static ResultSet rs = null;
+
+
+
+	private static String url = "jdbc:mysql://localhost:3306/sport";
+	private static String username = "root";
+	private static String password = "123456";
+	private static String driver = "com.mysql.cj.jdbc.Driver";//
+
+	
+	static {
+		try {
+
+			Class.forName(driver);
+		} catch (ClassNotFoundException e) {
+
+			e.printStackTrace();
+		}
+
+	}
+
+	
+	public static Connection getConnection() {
+
+		try {
+			cnn = DriverManager.getConnection(url, username, password);
+		} catch (SQLException e) {
+			// TODO Auto-generated catch block
+			e.printStackTrace();
+		}
+
+		return cnn;
+
+	}
+
+
+
+	public static ResultSet excuteQuery(String sql, String[] parameters) {
+
+		try {
+			cnn = getConnection();
+			ps = cnn.prepareStatement(sql);
+			if (parameters != null && !parameters.equals("")) {
+
+				for (int i = 0; i < parameters.length; i++) {
+
+					ps.setString(i + 1, parameters[i]);
+				}
+
+			}
+			rs = ps.executeQuery();
+		} catch (SQLException e) {
+			// TODO Auto-generated catch block
+			e.printStackTrace();
+		}
+
+		return rs;
+
+	}
+
+	/**
+	 * 
+	 *
+	 * 
+	 * @param sql
+	 * @param parameters
+	 */
+	public static boolean excuteUpdates(String sql, String[] parameters) {
+		
+		
+		boolean b=true;
+		try {
+			
+			
+			cnn = getConnection();
+			ps = cnn.prepareStatement(sql);
+			if (parameters != null && !parameters.equals("")) {
+
+				for (int i = 0; i < parameters.length; i++) {
+
+					ps.setString(i + 1, parameters[i]);
+
+				}
+			}
+			ps.executeUpdate();
+		} catch (SQLException e) {
+			// TODO Auto-generated catch block
+			e.printStackTrace();
+			
+			b=false;
+			throw new RuntimeException(e.getMessage());
+		}finally{
+			close(null,ps,cnn);
+		}
+		return b;
+
+	}
+
+	/**
+	 * 
+	 * 
+	 * @param rs
+	 * @param ps
+	 * @param cnn
+	 */
+	public static void close(ResultSet rs, PreparedStatement ps, Connection cnn) {
+
+		if (rs != null) {
+			try {
+				rs.close();
+			} catch (SQLException e) {
+				// TODO Auto-generated catch block
+				e.printStackTrace();
+			}
+			rs = null;
+		}
+		if (ps != null) {
+
+			try {
+				ps.close();
+			} catch (SQLException e) {
+				// TODO Auto-generated catch block
+				e.printStackTrace();
+			}
+			ps = null;
+
+		}
+		if (cnn != null) {
+
+			try {
+				cnn.close();
+			} catch (SQLException e) {
+				// TODO Auto-generated catch block
+				e.printStackTrace();
+			}
+			cnn = null;
+		}
+	}
+    
+	/**
+	 * 
+	 * 
+	 * 
+	 * @return
+	 */
+	public static Connection getCnn() {
+		return cnn;
+	}
+
+	public static PreparedStatement getPs() {
+		return ps;
+	}
+
+	public static ResultSet getRs() {
+		return rs;
+	}
+
+}