上传文件至 'src\BA_Control'

src\\BA_Control/Add.java

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+package BA_Control;
+
+import java.io.IOException;
+import java.io.PrintWriter;
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.sql.PreparedStatement;
+//import java.sql.ResultSet;
+//import java.sql.Statement;
+
+import javax.servlet.ServletException;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+public class Add extends HttpServlet {
+	public static final String DBURL = "jdbc:mysql://localhost:3306/kui?serverTimezone=GMT%2B8&useUnicode=true&characterEncoding=UTF-8";
+	public static final String DBUSER = "root";
+	public static final String DBPASS = "001011";
+	@Override
+	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
+		request.setCharacterEncoding("UTF-8");
+		response.setCharacterEncoding("UTF-8");
+		response.setContentType("text/html;UTF-8");
+		// 输出流
+		PrintWriter out = response.getWriter();
+		// 数据库连接代码
+		try {
+			//添加
+			String setName = request.getParameter("setName");
+			String setYear = request.getParameter("setYear");
+			String setScore = request.getParameter("setScore");
+
+			Connection conn = null; // 表示数据库的连接的对象
+			PreparedStatement ps = null;
+
+			// 1、使用Class类加载驱动程序
+			try {
+				Class.forName("com.mysql.jdbc.Driver");
+			} catch (ClassNotFoundException e) {
+				out.print("找不到driver");
+				e.printStackTrace();
+			}
+
+			// 2、连接数据库
+			conn = DriverManager.getConnection(DBURL, DBUSER, DBPASS);
+
+//			Statement stmt = null; // 表示数据库的更新操作
+//			stmt = conn.createStatement();
+
+			//添加
+			if(!setYear.equals("")) {
+				try {
+					ps = conn.prepareStatement("insert into line(name,year,score)values(?,?,?)");
+					ps.setString(1,setName);
+					ps.setString(2,setYear);
+					ps.setString(3,setScore);
+					ps.executeUpdate();
+				} catch (Exception e) {
+					out.print("添加出了点问题");
+					e.printStackTrace();
+				}
+			}
+			
+			conn.close();
+
+		} catch (Exception e) {
+			e.printStackTrace();
+		}
+			out.flush();
+			out.close();
+
+	}
+
+}

src\\BA_Control/Delete.java

@@ -0,0 +1,67 @@
+package BA_Control;
+
+import java.io.IOException;
+import java.io.PrintWriter;
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.sql.PreparedStatement;
+
+import javax.servlet.ServletException;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+public class Delete extends HttpServlet {
+	public static final String DBURL = "jdbc:mysql://localhost:3306/kui?serverTimezone=GMT%2B8&useUnicode=true&characterEncoding=UTF-8";
+	public static final String DBUSER = "root";
+	public static final String DBPASS = "001011";
+	@Override
+	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
+		request.setCharacterEncoding("UTF-8");
+		response.setCharacterEncoding("UTF-8");
+		response.setContentType("text/html;UTF-8");
+		// 输出流
+		PrintWriter out = response.getWriter();
+		// 数据库连接代码
+		try {
+			//删除
+			String delName = request.getParameter("delName");
+			String delYear = request.getParameter("delYear");
+
+			Connection conn = null; // 表示数据库的连接的对象
+			PreparedStatement ps = null;
+
+			// 1、使用Class类加载驱动程序
+			try {
+				Class.forName("com.mysql.jdbc.Driver");
+			} catch (ClassNotFoundException e) {
+				out.print("找不到driver");
+				e.printStackTrace();
+			}
+
+			// 2、连接数据库
+			conn = DriverManager.getConnection(DBURL, DBUSER, DBPASS);
+
+			//添加
+			if(!delName.equals("")) {
+				try {
+					String sql = "delete from line where name =\"" + delName + "\" and year = " + delYear;
+					ps = conn.prepareStatement(sql);
+					ps.executeUpdate();
+				} catch (Exception e) {
+					out.print("删除出了点问题");
+					e.printStackTrace();
+				}
+			}
+			
+			conn.close();
+
+		} catch (Exception e) {
+			e.printStackTrace();
+		}
+			out.flush();
+			out.close();
+
+	}
+
+}

src\\BA_Control/changePerform.java

@@ -0,0 +1,76 @@
+package BA_Control;
+
+import java.io.IOException;
+import java.io.PrintWriter;
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.sql.PreparedStatement;
+//import java.sql.ResultSet;
+//import java.sql.Statement;
+import java.sql.Statement;
+
+import javax.servlet.ServletException;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+public class changePerform extends HttpServlet {
+	public static final String DBURL = "jdbc:mysql://localhost:3306/kui?serverTimezone=GMT%2B8&useUnicode=true&characterEncoding=UTF-8";
+	public static final String DBUSER = "root";
+	public static final String DBPASS = "001011";
+
+	@Override
+	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
+		request.setCharacterEncoding("UTF-8");
+		response.setCharacterEncoding("UTF-8");
+		response.setContentType("text/html;UTF-8");
+		// 输出流
+		PrintWriter out = response.getWriter();
+		// 数据库连接代码
+		try {
+			
+			//修改
+			String changeName = request.getParameter("changeName");
+			String changeYear = request.getParameter("changeYear");
+			String changeScore = request.getParameter("changeScore");
+			
+			Connection conn = null; // 表示数据库的连接的对象
+			//Statement stmt = null; // 表示数据库的更新操作 
+			PreparedStatement ps = null;
+
+			// 1、使用Class类加载驱动程序
+			try {
+				Class.forName("com.mysql.jdbc.Driver");
+			} catch (ClassNotFoundException e) {
+				out.print("找不到driver");
+				e.printStackTrace();
+			}
+
+			// 2、连接数据库
+			conn = DriverManager.getConnection(DBURL, DBUSER, DBPASS);
+			//stmt = conn.createStatement();
+
+			//修改
+			if(!changeYear.equals("") && !changeScore.equals("")) {
+				out.println("进来修改啦");
+				try {
+					ps = conn.prepareStatement("update line set score =" + changeScore + " where name =\"" + changeName + "\" and year = " + changeYear); //转义字符串\,因为changeName是字符串,注意这里不要手贱加了空格
+					ps.executeUpdate();
+				} catch (Exception e) {
+					out.print("修改出了点问题");
+					e.printStackTrace();
+				}
+			}
+			
+			
+			conn.close();
+
+		} catch (Exception e) {
+			e.printStackTrace();
+		}
+			out.flush();
+			out.close();
+
+	}
+
+}

src\\BA_Control/pieChange.java

@@ -0,0 +1,74 @@
+package BA_Control;
+
+import java.io.IOException;
+import java.io.PrintWriter;
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.sql.PreparedStatement;
+//import java.sql.ResultSet;
+//import java.sql.Statement;
+import java.sql.Statement;
+
+import javax.servlet.ServletException;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+public class pieChange extends HttpServlet {
+	public static final String DBURL = "jdbc:mysql://localhost:3306/kui?serverTimezone=GMT%2B8&useUnicode=true&characterEncoding=UTF-8";
+	public static final String DBUSER = "root";
+	public static final String DBPASS = "001011";
+	@Override
+	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
+		request.setCharacterEncoding("UTF-8");
+		response.setCharacterEncoding("UTF-8");
+		response.setContentType("text/html;UTF-8");
+		// 输出流
+		PrintWriter out = response.getWriter();
+		// 数据库连接代码
+		try {
+			
+			//修改
+			String changeName = request.getParameter("changeName");
+			String changeScore = request.getParameter("changeScore");
+			
+			Connection conn = null; // 表示数据库的连接的对象
+			//Statement stmt = null; // 表示数据库的更新操作 
+			PreparedStatement ps = null;
+
+			// 1、使用Class类加载驱动程序
+			try {
+				Class.forName("com.mysql.jdbc.Driver");
+			} catch (ClassNotFoundException e) {
+				out.print("找不到driver");
+				e.printStackTrace();
+			}
+
+			// 2、连接数据库
+			conn = DriverManager.getConnection(DBURL, DBUSER, DBPASS);
+			//stmt = conn.createStatement();
+
+			//修改
+			if(!changeName.equals("") && !changeScore.equals("")) {
+				out.println("进来修改啦");
+				try {
+					ps = conn.prepareStatement("update pie set score =" + changeScore + " where name =\"" + changeName + "\""); //转义字符串\,因为changeName是字符串,注意这里不要手贱加了空格
+					ps.executeUpdate();
+				} catch (Exception e) {
+					out.print("修改出了点问题");
+					e.printStackTrace();
+				}
+			}
+			
+			
+			conn.close();
+
+		} catch (Exception e) {
+			e.printStackTrace();
+		}
+			out.flush();
+			out.close();
+
+	}
+
+}