spring boot整合mybatis利用Mysql实现主键UUID的方法

2019-11-26 10:12:05

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前言

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实现

基础项目的pom.xml部分代码如下

 <properties>  <java.version>1.8</java.version> </properties> <!-- Inherit defaults from Spring Boot --> <parent>  <groupId>org.springframework.boot</groupId>  <artifactId>spring-boot-starter-parent</artifactId>  <version>1.5.9.RELEASE</version> </parent> <dependencies>  <!--Spring Boot依赖-->  <dependency>   <groupId>org.springframework.boot</groupId>   <artifactId>spring-boot-starter-web</artifactId>  </dependency>  <dependency>   <groupId>org.springframework.boot</groupId>   <artifactId>spring-boot-starter-jdbc</artifactId>  </dependency>  <dependency>   <groupId>org.springframework.boot</groupId>   <artifactId>spring-boot-starter-test</artifactId>   <scope>test</scope>  </dependency>  <!--常用库依赖-->  <dependency>   <groupId>commons-codec</groupId>   <artifactId>commons-codec</artifactId>  </dependency>  <dependency>   <groupId>org.apache.commons</groupId>   <artifactId>commons-lang3</artifactId>   <version>3.6</version>  </dependency>  <dependency>   <groupId>com.google.guava</groupId>   <artifactId>guava</artifactId>   <version>23.0</version>  </dependency>  <!--MySQL JDBC驱动-->  <dependency>   <groupId>mysql</groupId>   <artifactId>mysql-connector-java</artifactId>   <scope>runtime</scope>  </dependency>  <!--MyBatis 及 插件依赖-->  <dependency>   <groupId>org.mybatis</groupId>   <artifactId>mybatis-spring</artifactId>   <version>1.3.1</version>  </dependency>  <dependency>   <groupId>org.mybatis</groupId>   <artifactId>mybatis</artifactId>   <version>3.4.5</version>  </dependency>  <dependency>   <groupId>tk.mybatis</groupId>   <artifactId>mapper</artifactId>   <version>3.4.2</version>  </dependency>  <dependency>   <groupId>com.github.pagehelper</groupId>   <artifactId>pagehelper</artifactId>   <version>4.2.1</version>  </dependency>  <!--阿里 FastJson依赖-->  <dependency>   <groupId>com.alibaba</groupId>   <artifactId>fastjson</artifactId>   <version>1.2.44</version>  </dependency>  <!--阿里 Druid Spring Boot Starter依赖-->  <dependency>   <groupId>com.alibaba</groupId>   <artifactId>druid-spring-boot-starter</artifactId>   <version>1.1.6</version>  </dependency> </dependencies></project>

具体的mybatis配置如下

@Bean public MapperScannerConfigurer mapperScannerConfigurer() {  MapperScannerConfigurer mapperScannerConfigurer = new MapperScannerConfigurer();  mapperScannerConfigurer.setSqlSessionFactoryBeanName("sqlSessionFactoryBean");  mapperScannerConfigurer.setBasePackage(MAPPER_PACKAGE);  //配置通用Mapper，详情请查阅官方文档  Properties properties = new Properties();  properties.setProperty("mappers", MAPPER_INTERFACE_REFERENCE);  properties.setProperty("notEmpty", "true");//insert、update是否判断字符串类型!='' 即 test="str != null"表达式内是否追加 and str != ''  properties.setProperty("IDENTITY", "SELECT UUID()");//使用UUID作主  properties.setProperty("ORDER","BEFORE");//将查询主键作为前置操作  mapperScannerConfigurer.setProperties(properties);  return mapperScannerConfigurer; }

实体如下

public class User { @Id @Column(name = "ID") @GeneratedValue(strategy = GenerationType.IDENTITY) private String id; @Column(name = "CREATED_BY") private String createdBy; @DateTimeFormat(pattern = "yyyy-MM-dd HH:mm:ss") @Column(name = "CREATED_DATE") private Date createdDate; @Column(name = "LAST_MODIFIED_BY") private String lastModifiedBy; @DateTimeFormat(pattern = "yyyy-MM-dd HH:mm:ss") @Column(name = "LAST_MODIFIED_DATE") private Date lastModifiedDate;

下面这一行代码是为了解决spring MVC在入参是Date类型时或出现异常的问题

@DateTimeFormat(pattern = "yyyy-MM-dd HH:mm:ss")

测试

配置文件配置输出mybatis的sql日志

logging.level.com.你的dao或mapper包=debug

执行对应插入操作观察控制台

2018-03-06 17:59:22.612 DEBUG 6208 --- [nio-8686-exec-1] XXXXX: ==> Executing: SELECT UUID() 2018-03-06 17:59:22.629 DEBUG 6208 --- [nio-8686-exec-1] XXXXX: <==  Total: 12018-03-06 17:59:22.651 DEBUG 6208 --- [nio-8686-exec-1] XXXXX: ==> Preparing: INSERT INTO user ( ID,USER_NAME,NICK_NAME,PWD_SALT,PWD_LOGIN,CREATED_BY,CREATED_DATE,LAST_MODIFIED_BY,LAST_MODIFIED_DATE,ACCOUNT_TYPE,ACCOUNT_LOCKED,ONLINE_STATUS,GROUP_ID,GROUP_NAME ) VALUES( ?,?,?,?,? ) 2018-03-06 17:59:22.665 DEBUG 6208 --- [nio-8686-exec-1] XXXXX: ==> Parameters: 0b97ad1b-2125-11e8-9b42-704d7b7036d3(String), 2(String), 2018-01-01 01:07:05.0(Timestamp), 2(String), 2018-01-01 01:07:05.0(Timestamp)2018-03-06 17:59:22.670 DEBUG 6208 --- [nio-8686-exec-1] XXXXX: <== Updates: 1

可以看到,首先执行了查询UUID的操作,然后将执行结果作为插入的主键执行插入操作.

总结

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