mybatis--jdbc&数据库连接池DataSource&lombok的使用

springboot-mybatis-quickstart/pom.xml

@@ -40,6 +40,19 @@
             <artifactId>spring-boot-starter-test</artifactId>
             <scope>test</scope>
         </dependency>
+
+        <!--druid德鲁伊数据库连接池的依赖-->
+        <dependency>
+            <groupId>com.alibaba</groupId>
+            <artifactId>druid-spring-boot-starter</artifactId>
+            <version>1.2.8</version>
+        </dependency>
+
+        <!--lombok依赖-->
+        <dependency>
+            <groupId>org.projectlombok</groupId>
+            <artifactId>lombok</artifactId>
+        </dependency>
     </dependencies>
     <dependencyManagement>
         <dependencies>

springboot-mybatis-quickstart/src/main/java/com/inmind/pojo/User.java

@@ -1,71 +1,19 @@
 package com.inmind.pojo;
+
+import lombok.*;
+
 //对应User表的实体类
+//@Getter
+//@Setter
+//@ToString
+//@EqualsAndHashCode
+@Data
+@AllArgsConstructor
+@NoArgsConstructor
 public class User {
     private Integer id;
     private String name;
     private Short age;
     private Short gender;
     private String phone;
-
-    public User() {
-    }
-
-    public User(Integer id, String name, Short age, Short gender, String phone) {
-        this.id = id;
-        this.name = name;
-        this.age = age;
-        this.gender = gender;
-        this.phone = phone;
-    }
-
-    public Integer getId() {
-        return id;
-    }
-
-    public void setId(Integer id) {
-        this.id = id;
-    }
-
-    public String getName() {
-        return name;
-    }
-
-    public void setName(String name) {
-        this.name = name;
-    }
-
-    public Short getAge() {
-        return age;
-    }
-
-    public void setAge(Short age) {
-        this.age = age;
-    }
-
-    public Short getGender() {
-        return gender;
-    }
-
-    public void setGender(Short gender) {
-        this.gender = gender;
-    }
-
-    public String getPhone() {
-        return phone;
-    }
-
-    public void setPhone(String phone) {
-        this.phone = phone;
-    }
-
-    @Override
-    public String toString() {
-        return "User{" +
-                "id=" + id +
-                ", name='" + name + '\'' +
-                ", age=" + age +
-                ", gender=" + gender +
-                ", phone='" + phone + '\'' +
-                '}';
-    }
 }

springboot-mybatis-quickstart/src/test/java/com/inmind/SpringbootMybatisQuickstartApplicationTests.java

@@ -6,6 +6,11 @@ import org.junit.jupiter.api.Test;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.test.context.SpringBootTest;
 
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.sql.ResultSet;
+import java.sql.Statement;
+import java.util.ArrayList;
 import java.util.List;
 
 @SpringBootTest//在进行单元测试时，启动spring程序，启动IOC，将程序中Bean对象加载到容器
@@ -28,4 +33,40 @@ class SpringbootMybatisQuickstartApplicationTests {
         }
     }
 
+    //压实JDBC代码
+    @Test
+    public void testJdbc() throws Exception {
+        //1. 注册驱动
+        Class.forName("com.mysql.cj.jdbc.Driver");
+
+        //2. 获取连接对象
+        String url = "jdbc:mysql://localhost:3306/mybatis2";
+        String username = "root";
+        String password = "1234";
+        Connection connection = DriverManager.getConnection(url, username, password);
+
+        //3. 获取执行SQL的对象Statement,执行SQL,返回结果
+        String sql = "select * from user";
+        Statement statement = connection.createStatement();
+        ResultSet resultSet = statement.executeQuery(sql);
+
+        //4. 封装结果数据
+        List<User> userList = new ArrayList<>();
+        while (resultSet.next()){
+            int id = resultSet.getInt("id");
+            String name = resultSet.getString("name");
+            short age = resultSet.getShort("age");
+            short gender = resultSet.getShort("gender");
+            String phone = resultSet.getString("phone");
+
+            User user = new User(id,name,age,gender,phone);
+            userList.add(user);
+        }
+        userList.stream().forEach(user -> System.out.println(user));
+
+        //5. 释放资源
+        statement.close();
+        connection.close();
+    }
+
 }