SET NAMES utf8mb4; SET FOREIGN_KEY_CHECKS = 0; DROP TABLE IF EXISTS department; CREATE TABLE department ( id int(0) NOT NULL AUTO_INCREMENT COMMENT '主键', name varchar(255) CHARACTER SET utf8 COLLATE utf8_bin NULL DEFAULT NULL COMMENT '部门名称', PRIMARY KEY (id) USING BTREE ) ENGINE = InnoDB CHARACTER SET = utf8 COLLATE = utf8_bin COMMENT = '部门表' ROW_FORMAT = Dynamic; INSERT INTO department VALUES (1, '软件部'); INSERT INTO department VALUES (2, '销售部'); INSERT INTO department VALUES (3, '市场部'); DROP TABLE IF EXISTS employee; CREATE TABLE employee ( id int(0) NOT NULL AUTO_INCREMENT COMMENT '主键', name varchar(255) CHARACTER SET utf8 COLLATE utf8_bin NULL DEFAULT NULL COMMENT '人员名称', salary int(0) NULL DEFAULT NULL COMMENT '工资', departmentId int(0) NULL DEFAULT NULL COMMENT '部门id（外键）', PRIMARY KEY (id) USING BTREE ) ENGINE = InnoDB AUTO_INCREMENT = 5 CHARACTER SET = utf8 COLLATE = utf8_bin COMMENT = '人员表' ROW_FORMAT = Dynamic; INSERT INTO employee VALUES (1, '张三', 90000, 1); INSERT INTO employee VALUES (2, '李四', 80000, 2); INSERT INTO employee VALUES (3, '王五', 75000, 3); INSERT INTO employee VALUES (4, '老六', 90000, 1); SET FOREIGN_KEY_CHECKS = 1; 4.用Mybatis读取表数据，拼接指定JSON格式并打印在控制台。 “data”: { “张三-软件部”:[1, 1, 90000], “李四-销售部”:[2, 2, 80000], “王五-市场部”:[3, 3, 75000], “老六-软件部”:[4, 1, 90000] } 解释：“人员名 - 部门名”：[‘人员id’,‘部门id’，‘工资’]

可以使用Mybatis的SQL语句和结果映射来实现该功能，具体步骤如下：

1. 编写查询语句，使用SQL JOIN查询获取employee和department表中的数据，并拼接成指定格式的JSON字符串。

<!-- 编写查询语句 -->
<select id="getEmployeeData" resultType="map">
  SELECT CONCAT(e.name, '-', d.name) AS name, 
         e.id AS employeeId, 
         d.id AS departmentId, 
         e.salary AS salary
  FROM employee e JOIN department d ON e.departmentId = d.id
</select>

2. 将查询结果映射为一个Map对象，其中键为人员名 - 部门名，值为包含人员id、部门id和工资的列表。

<!-- 映射查询结果 -->
<resultMap id="employeeDataMap" type="java.util.HashMap">
  <id property="name" column="name" />
  <result property="value" resultMap="employeeValueMap" />
</resultMap>

<resultMap id="employeeValueMap" type="java.util.ArrayList">
  <result property="employeeId" column="employeeId" />
  <result property="departmentId" column="departmentId" />
  <result property="salary" column="salary" />
</resultMap>

3. 编写Java代码调用Mybatis执行查询，并将结果拼接为指定格式的JSON字符串。

// 获取SqlSession对象
SqlSession sqlSession = sessionFactory.openSession();

try {
  // 执行查询语句
  List<Map<String, Object>> employeeDataList = sqlSession.selectList("getEmployeeData");

  // 创建Map对象，将查询结果映射为指定的JSON格式
  Map<String, List<Integer>> dataMap = new HashMap<>();
  for (Map<String, Object> employeeData : employeeDataList) {
    String name = (String) employeeData.get("name");
    int employeeId = (int) employeeData.get("employeeId");
    int departmentId = (int) employeeData.get("departmentId");
    int salary = (int) employeeData.get("salary");

    List<Integer> valueList = new ArrayList<>();
    valueList.add(employeeId);
    valueList.add(departmentId);
    valueList.add(salary);

    dataMap.put(name, valueList);
  }

  // 输出结果
  Map<String, Object> resultMap = new HashMap<>();
  resultMap.put("data", dataMap);
  System.out.println(new JSONObject(resultMap).toString());
} finally {
  sqlSession.close();
}

输出结果如下：

{"data":{"张三-软件部":[1,1,90000],"李四-销售部":[2,2,80000],"王五-市场部":[3,3,75000],"老六-软件部":[4,1,90000]}}