任务10

.idea/dataSources.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="DataSourceManagerImpl" format="xml" multifile-model="true">
+    <data-source source="LOCAL" name="@localhost" uuid="c43832b1-ab66-4107-a9d6-04b8389eea6f">
+      <driver-ref>mysql.8</driver-ref>
+      <synchronize>true</synchronize>
+      <jdbc-driver>com.mysql.cj.jdbc.Driver</jdbc-driver>
+      <jdbc-url>jdbc:mysql://localhost:3306</jdbc-url>
+      <working-dir>$ProjectFileDir$</working-dir>
+    </data-source>
+  </component>
+</project>

grademanagement-MyBatisProject/grademanagement-MyBatisProject.iml

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

grademanagement-MyBatisProject/src/com/ssm/entity/Course.java

@@ -0,0 +1,50 @@
+package com.ssm.entity;
+
+public class Course {
+    private Integer courseId;      // 课程ID
+    private String courseName;     // 课程名称
+    private Integer credit;        // 学分（与数据库int类型匹配）
+    private String teacher;        // 教师
+
+    public Integer getCourseId() {
+        return courseId;
+    }
+
+    public void setCourseId(Integer courseId) {
+        this.courseId = courseId;
+    }
+
+    public String getCourseName() {
+        return courseName;
+    }
+
+    public void setCourseName(String courseName) {
+        this.courseName = courseName;
+    }
+
+    public Integer getCredit() {
+        return credit;
+    }
+
+    public void setCredit(Integer credit) {
+        this.credit = credit;
+    }
+
+    public String getTeacher() {
+        return teacher;
+    }
+
+    public void setTeacher(String teacher) {
+        this.teacher = teacher;
+    }
+
+    @Override
+    public String toString() {
+        return "Course{" +
+                "courseId=" + courseId +
+                ", courseName='" + courseName + '\'' +
+                ", credit=" + credit +
+                ", teacher='" + teacher + '\'' +
+                '}';
+    }
+}

grademanagement-MyBatisProject/src/com/ssm/mapper/CourseMapper.java

@@ -0,0 +1,10 @@
+package com.ssm.mapper;
+
+import com.ssm.entity.Course;
+
+import java.util.List;
+
+public interface CourseMapper {
+    Course getCourseById(Integer courseId);
+    List<Course> getAllCourses();
+}

grademanagement-MyBatisProject/src/com/ssm/mapper/CourseMapper.xml

@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="UTF-8" ?>
+<!DOCTYPE mapper
+        PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
+        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
+<mapper namespace="com.ssm.mapper.CourseMapper">
+    <!-- 根据ID查询课程 -->
+    <select id="getCourseById" resultType="com.ssm.entity.Course">
+        SELECT courseId, coursename, credit, teacher
+        FROM course
+        WHERE courseId = #{courseId}
+    </select>
+    
+    <!-- 查询所有课程 -->
+    <select id="getAllCourses" resultType="com.ssm.entity.Course">
+        SELECT courseId, coursename, credit, teacher
+        FROM course
+        ORDER BY courseId
+    </select>
+</mapper>

grademanagement-MyBatisProject/src/com/ssm/test/TestMyBatis.java

@@ -0,0 +1,44 @@
+package com.ssm.test;
+
+import com.ssm.entity.Course;
+import com.ssm.mapper.CourseMapper;
+import org.apache.ibatis.io.Resources;
+import org.apache.ibatis.session.SqlSession;
+import org.apache.ibatis.session.SqlSessionFactory;
+import org.apache.ibatis.session.SqlSessionFactoryBuilder;
+
+import java.io.InputStream;
+import java.util.List;
+
+public class TestMyBatis {
+    public static void main(String[] args) {
+        try {
+            // 使用正确的配置文件名 config.xml
+            SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(Resources.getResourceAsStream("config.xml"));
+            SqlSession sqlSession = sqlSessionFactory.openSession(true);
+            System.out.println("✅ MyBatis 连接成功！");
+
+            // 使用正确的变量名 sqlSession
+            CourseMapper courseMapper = sqlSession.getMapper(CourseMapper.class);
+            
+            // 测试查询单个课程
+            System.out.println("\n=== 成员吕淼 查询课程ID=1 ===");
+            Course course = courseMapper.getCourseById(1);
+            System.out.println(course);
+            
+            // 测试查询所有课程
+            System.out.println("\n=== 所有课程列表 ===");
+            List<Course> courses = courseMapper.getAllCourses();
+            for (Course c : courses) {
+                System.out.println(c);
+            }
+            
+            sqlSession.close();
+            System.out.println("\n✅ 测试完成！");
+            
+        } catch (Exception e) {
+            System.err.println("❌ 测试失败：");
+            e.printStackTrace();
+        }
+    }
+}

grademanagement-MyBatisProject/src/config.xml

@@ -4,5 +4,23 @@
   "http://mybatis.org/dtd/mybatis-3-config.dtd">
 <!-- mybatis全局配置文件 --> 
 <configuration>	
-
+    <!-- 配置环境 -->
+    <environments default="development">
+        <environment id="development">
+            <!-- 使用JDBC事务管理 -->
+            <transactionManager type="JDBC"/>
+            <!-- 数据库连接池 -->
+            <dataSource type="POOLED">
+                <property name="driver" value="com.mysql.cj.jdbc.Driver"/>
+                <property name="url" value="jdbc:mysql://localhost:3306/ssm?serverTimezone=Asia/Shanghai&amp;useSSL=false&amp;allowPublicKeyRetrieval=true"/>
+                <property name="username" value="root"/>
+                <property name="password" value="123456"/>
+            </dataSource>
+        </environment>
+    </environments>
+    
+    <!-- 配置Mapper映射文件 -->
+    <mappers>
+        <mapper resource="com/ssm/mapper/CourseMapper.xml"/>
+    </mappers>
 </configuration>

grademanagement/initial.sql

@@ -1,9 +1,7 @@
 
-
 SET NAMES utf8mb4;
 SET FOREIGN_KEY_CHECKS = 0;
 
-
 -- ----------------------------
 -- Table structure for demo
 -- ----------------------------
@@ -25,3 +23,23 @@ INSERT INTO `demo` VALUES (23, '4', '444');
 INSERT INTO `demo` VALUES (24, '5', '555');
 INSERT INTO `demo` VALUES (25, '6', '666');
 INSERT INTO `demo` VALUES (26, '7', '777');
+
+-- ----------------------------
+-- Table structure for course
+-- ----------------------------
+DROP TABLE IF EXISTS `course`;
+CREATE TABLE `course`  (
+  `courseId` int(11) NOT NULL AUTO_INCREMENT,
+  `coursename` varchar(100) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL,
+  `credit` int(11) NULL DEFAULT NULL,
+  `teacher` varchar(100) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
+  PRIMARY KEY (`courseId`) USING BTREE
+) ENGINE = InnoDB AUTO_INCREMENT = 1 CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = Compact;
+
+-- ----------------------------
+-- Records of course
+-- ----------------------------
+INSERT INTO `course` VALUES (1, '英语', 0, '张华');
+INSERT INTO `course` VALUES (2, 'C语言', 1, '李磊');
+
+SET FOREIGN_KEY_CHECKS = 1;

grademanagement/src/applicationContext.xml

@@ -18,8 +18,9 @@
 	</context:component-scan>
 	
 	<!-- 2.引入db.properties
-		注意：①方式二：<bean id="" class="PropertyPlaceholderConfigurer"> -->
-	<context:property-placeholder location="classpath:db.properties"/>
+		注意：①方式二：<bean id="" class="PropertyPlaceholderConfigurer">
+		②如果多个properties文件，可以使用location属性配置多个 -->
+	<context:property-placeholder location="classpath:db.properties" ignore-unresolvable="true"/>
 	
 	<!-- 3.引入数据库的数据源配置：
 		注意：①还可以配置事务控制、AOP等
@@ -31,11 +32,19 @@
 			<property name="password" value="${password}"></property>
 		</bean>  -->
 	<bean id="dataSource" class="org.apache.commons.dbcp2.BasicDataSource">
-		<!-- 这里报错说明类中不存在这个属性，需要改成规定的属性名 -->
+		<!-- 这里报错说明类中不存在这个属性,需要改成规定的属性名 -->
 		<property name="driverClassName" value="${driver}"></property>
 		<property name="url" value="${url}"></property>
 		<property name="username" value="${user}"></property>
 		<property name="password" value="${password}"></property>
+		<!-- 连接池配置 -->
+		<property name="initialSize" value="5"></property>
+		<property name="maxTotal" value="20"></property>
+		<property name="maxIdle" value="10"></property>
+		<property name="minIdle" value="5"></property>
+		<property name="maxWaitMillis" value="60000"></property>
+		<property name="validationQuery" value="SELECT 1"></property>
+		<property name="testOnBorrow" value="true"></property>
 	</bean>
 	
 	<!-- 事务管理器DataSourceTransactionManager，该类在spring-jdbc包中，指定这个事务管理器管理配置的dataSource数据源 -->
@@ -53,7 +62,7 @@
 			 即接口类的对象，然后才能操作具体增删改查操作。
 			 (2)Spring声明式事务非常强大，想让Spring管理事务。
 		注意：①SqlSessionFactoryBean类能创建出SqlSessionFactory对象，意味着容器一启动让容器帮我们创建SqlSessionFactory-->
-	<bean id="sqlSessionFactoryBean" class="org.mybatis.spring.SqlSessionFactoryBean">
+	<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
 		<!-- 访问数据库必然需要数据源，管理数据库的连接，提高数据库性能，在数据源中配置使用的连接池 -->
 		<property name="dataSource" ref="dataSource"></property>
 		<!-- 加载MyBatis全局配置文件config.xml，如果config.xml中没有东西可以删掉，
@@ -62,6 +71,8 @@
 		<!-- 指定SQL映射文件的位置，当SQL映射文件和接口名不一致时，使用该方法指定。
 		(不讲)?如果名字一致，则可以使用<mybatis:scan base-package=""/>扫描所有mapper SQL映射文件(报错，mybatis前缀未绑定)? -->
 		<property name="mapperLocations" value="classpath:com/ssm/mapper/*.xml"></property>
+		<!-- 配置类型别名包，让MyBatis能够识别实体类 -->
+		<property name="typeAliasesPackage" value="com.ssm.entity"></property>
 		<!-- 此处还可以配置别名处理器等,这些以前都是在全局配置文件中定义的，现在都变成sqlSessionFactoryBean的一个属性,
 		相当于mybatis全局配置文件中的内容都拿到Spring配置文件来配置。 -->
 	</bean>

grademanagement/src/db.properties

@@ -1,4 +1,4 @@
 driver=com.mysql.cj.jdbc.Driver
-url=jdbc:mysql://localhost:3306/ssm_farm?serverTimezone=Asia/Shanghai
+url=jdbc:mysql://localhost:3306/ssm?serverTimezone=Asia/Shanghai
 user=root
 password=root