# MapperGenerator

**Repository Path**: a1422749310/mapper-generator

## Basic Information

- **Project Name**: MapperGenerator
- **Description**: 测试时，可快速调用 Mapper 的 Mapper Generator
- **Primary Language**: Unknown
- **License**: Not specified
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 0
- **Created**: 2023-05-01
- **Last Updated**: 2023-05-01

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

使用教程：[测试时，可快速调用 Mapper 的 Mapper Generator](https://blog.csdn.net/qq_30763385/article/details/130456408)

解决的问题：SpringBootTest 启动太慢

实现方式：递归读取 xml 文件，解析其内部 namespace，add 到 configuration 中

参考：[不使用 XML 构建 SqlSessionFactory](https://mybatis.org/mybatis-3/zh/getting-started.html#%E4%B8%8D%E4%BD%BF%E7%94%A8-xml-%E6%9E%84%E5%BB%BA-sqlsessionfactory)


## 使用方式
假设有这样一个数据库，名为 a
```sql
SET NAMES utf8mb4;
SET FOREIGN_KEY_CHECKS = 0;

-- ----------------------------
-- Table structure for a
-- ----------------------------
DROP TABLE IF EXISTS `a`;
CREATE TABLE `a`  (
  `a` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NULL DEFAULT NULL,
  `b` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NULL DEFAULT NULL,
  `c` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NULL DEFAULT NULL
) ENGINE = InnoDB CHARACTER SET = utf8mb4 COLLATE = utf8mb4_general_ci ROW_FORMAT = Dynamic;

-- ----------------------------
-- Records of a
-- ----------------------------
INSERT INTO `a` VALUES ('1', '1', '2');
INSERT INTO `a` VALUES ('2', '1', '2');
INSERT INTO `a` VALUES ('3', '1', '3');
INSERT INTO `a` VALUES ('4', '1', '3');
INSERT INTO `a` VALUES ('5', '1', '4');
INSERT INTO `a` VALUES ('6', '1', '5');

SET FOREIGN_KEY_CHECKS = 1;
```

使用如下

```java
 @Test
 public void test_mapper_find_all() {
     // 获取 Mapper
     AMapper mapper = MapperGenerator.getMapper(AMapper.class);
     // 执行内容
     List<A> all = mapper.findAll();
     // 输出结果
     all.forEach(System.out::println);
 }
```

项目结构如下，使用前，需修改 GeneratorConstants 下的配置信息