向数据库写入数据

Java2024.iml

@@ -7,5 +7,6 @@
     </content>
     <orderEntry type="inheritedJdk" />
     <orderEntry type="sourceFolder" forTests="false" />
+    <orderEntry type="library" name="lib" level="project" />
   </component>
 </module>

note.txt

@@ -0,0 +1,2 @@
+这是第一行
+这是第二行

src/chapter10/Example01.java

@@ -0,0 +1,46 @@
+package chapter10;
+
+import java.sql.Connection;
+import java.sql.ResultSet;
+import java.sql.Statement;
+import java.sql.DriverManager;
+
+public class Example01 {
+    public static void main(String[] args) {
+        try {
+            // 1. 加载驱动
+            Class.forName("com.mysql.cj.jdbc.Driver");
+
+            // 2. 准备连接参数
+            String url = "jdbc:mysql://localhost:3306/school?characterEncoding=utf-8&useSSL=false&serverTimezone=UTC";
+            String username = "root";
+            String password = "root";
+
+            // 使用try-with-resources自动关闭资源
+            try (
+                    // 创建连接
+                    Connection connection = DriverManager.getConnection(url, username, password);
+                    // 创建语句对象
+                    Statement statement = connection.createStatement();
+                    // 执行查询获取结果集
+                    ResultSet resultSet = statement.executeQuery("select * from student")
+            ) {
+                // 处理结果集
+                while (resultSet.next()) {
+                    int id = resultSet.getInt("id");
+                    String name = resultSet.getString("name");
+                    int age = resultSet.getInt("age");
+                    String gender = resultSet.getString("gender");
+                    String className = resultSet.getString("class");
+
+                    System.out.println("id=" + id + ", name=" + name + ", age=" + age +
+                            ", gender=" + gender + ", className=" + className);
+                }
+            }
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+
+
+    }
+}

src/chapter10/Example02.java

@@ -0,0 +1,37 @@
+package chapter10;
+
+import java.sql.Connection;
+import java.sql.Statement;
+import java.sql.DriverManager;
+
+public class Example02 {
+    public static void main(String[] args) {
+        try {
+            // 1. 加载驱动
+            Class.forName("com.mysql.cj.jdbc.Driver");
+
+            // 2. 准备连接参数
+            String url = "jdbc:mysql://localhost:3306/school?characterEncoding=utf-8&useSSL=false&serverTimezone=UTC";
+            String username = "root";
+            String password = "root";
+
+            // 使用try-with-resources自动关闭资源
+            try (
+                    Connection connection = DriverManager.getConnection(url, username, password);
+                    Statement statement = connection.createStatement()
+            ) {
+                // 准备INSERT语句
+                String sql = "INSERT INTO student (name, age, gender, class, score) " +
+                        "VALUES ('小张', 19, 'M', '计算机1班', 88.5)";
+
+                // 执行INSERT语句
+                int rows = statement.executeUpdate(sql);
+
+                // 输出受影响的行数
+                System.out.println("成功插入 " + rows + " 条数据");
+            }
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+    }
+}

test.txt

@@ -0,0 +1 @@
+itcast

work.txt

@@ -0,0 +1,3 @@
+Java程序设计
+大数据2班
+2024年