mybatis-plus 批量插入示例代码

default boolean saveBatch(Collection<T> entityList) {
        return this.saveBatch(entityList, 1000);
    }

public boolean saveBatch(Collection<T> entityList, int batchSize) {
        String sqlStatement = this.getSqlStatement(SqlMethod.INSERT_ONE);
        return this.executeBatch(entityList, batchSize, (sqlSession, entity) -> {
            sqlSession.insert(sqlStatement, entity);
        });
    }

INSERT_ONE("insert", "插入一条数据（选择字段插入）", "<script>\nINSERT INTO %s %s VALUES %s\n</script>"),

/**
 * 支持自定义SQL注入方法
 */
public class CustomSqlInjector extends DefaultSqlInjector {
    @Override
    public List<AbstractMethod> getMethodList(Class<?> mapperClass) {
        // 获取父类SQL注入方法列表
        List<AbstractMethod> methodList = super.getMethodList(mapperClass);
        // 将批量插入方法添加进去
        methodList.add(new InsertBatchSomeColumn());
        return methodList;
    }
}

@Bean
public CustomSqlInjector customSqlInjector() {
     return new CustomSqlInjector();
}

/**
 * 自定义Mapper，添加批量插入接口
 * @param <T>
 */
@Mapper
public interface CustomMapper<T> extends BaseMapper<T> {
    /**
     * 批量插入
     * @param entityList 实体列表
     * @return 影响行数
     */
    Integer insertBatchSomeColumn(Collection<T> entityList);
}

@Mapper
public interface StudentDao extends CustomMapper<Student> {
    List<Student> query(Student student);
}

@Transactional  //事务注解要加上
    @Override
    public void testBatchCreate() {
        List<Student> list = new ArrayList<>();
        int startIndex = this.lambdaQuery().select(Student::getId).count();
        for (int i = 1; i <= 1000000; i++) {
            Student student = new Student();
            Long id = SnowFlake.nextId();
            student.setId(id);
            student.setCode("studentCode-" + (startIndex + i));
            student.setName("studentName-" + (startIndex + i));
            list.add(student);
        }
        Long startTime = System.currentTimeMillis();
        System.out.println("开始批量操作：" + startTime);
        int count = this.baseMapper.insertBatchSomeColumn(list);
        Long endTime = System.currentTimeMillis();
        System.out.println("完成批量操作：" + endTime);
        System.out.println("用时：" + (endTime - startTime));
        System.out.println("保存成功：" + count);
        //this.saveBatch(list);
    }