SpringBoot SSM整合
一、Spring Boot整合Web开发
1.默认静态资源配置
WebMvcAutoConfiguration该类下找到属性：ResourceProperties进入可查看到：Spring Boot 默认将 /** 所有访问映射到以下目录：
classpath:/staticclasspath:/publicclasspath:/resourcesclasspath:/META-INF/resources
如：在src/main/resources目录下新建 public、resources、static 三个目录，并分别放入 a.jpg b.jpg c.jpg 图片
均能正常访问相应的图片资源。那么说明，Spring Boot 默认会挨个从 public resources static 里面找是否存在相应的资源，如果有则直接返回。
2.在application配置
在application.properties中添加配置：
注意：通过spring.mvc.static-path-pattern这种方式配置，会使Spring Boot的默认配置失效，也就是说，/public /resources 等默认配置不能使用。配置中配置了静态模式为/static/，就只能通过/static/来访问。
spring: mvc: static-path-pattern: /static/**
3. 配置主页面
WebMvcAutoConfiguration:默认：index.html
在静态资源下 public、resources、static可直接访问
@Beanpublic WelcomePageHandlerMapping welcomePageHandlerMapping(ApplicationContext applicationContext) { return new WelcomePageHandlerMapping(new TemplateAvailabilityProviders(applicationContext), applicationContext, getWelcomePage(), this.mvcProperties.getStaticPathPattern());} 二、SpringBoot整合MyBatis
1、新建SpringBoot工程
2、POM.XML SSM
<dependencies> <!-- spring web mvc--> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <!-- spring mybatis --> <dependency> <groupId>org.mybatis.spring.boot</groupId> <artifactId>mybatis-spring-boot-starter</artifactId> <version>2.1.0</version> </dependency> <!-- mysql 驱动--> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <scope>runtime</scope> </dependency> <!-- 热部署 --> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-devtools</artifactId> <optional>true</optional> </dependency> <!-- 单元测试 --> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> </dependencies>
<!-- druid 数据源连接池 --> <dependency> <groupId>com.alibaba</groupId> <artifactId>druid-spring-boot-starter</artifactId> <version>1.1.10</version> </dependency>
3、bean代码
@Datapublic class User { private Integer id; private String name; private String telphone; private Integer status; } 4、mapper代码
@Mapper //MapperScannerConfigurer 自动扫描 将Mapper接口生成代理注入到Spring DAO接口所在包名，Spring会自动查找其下的类public interface UserMapper { List<User> selectAll(); ........}
5、application.yml配置
server: port: 8080 context-path: /bootspring: #数据源连接配置 datasource: name: test type: com.alibaba.druid.pool.DruidDataSource druid: #druid相关配置 url: jdbc:mysql://localhost:3306/school?serverTimezone=UTC&useUnicode=true&characterEncoding=utf-8&useSSL=false driver-class-name: com.mysql.cj.jdbc.Driver username: root password: root #监控统计拦截的filters filters: stat #配置初始化大小/最小/最大 initial-size: 1 min-idle: 1 max-active: 20 #获取连接等待超时时间 max-wait: 60000 #间隔多久进行一次检测，检测需要关闭的空闲连接 time-between-eviction-runs-millis: 60000 #一个连接在池中最小生存的时间 min-evictable-idle-time-millis: 300000 validation-query: SELECT 'x' test-while-idle: true test-on-borrow: false test-on-return: false #打开PSCache，并指定每个连接上PSCache的大小。oracle设为true，mysql设为false。分库分表较多推荐设置为false pool-prepared-statements: false max-pool-prepared-statement-per-connection-size: 20#整合myBatismybatis: mapper-locations: classpath:mapper/*.xml # mapper映射对应的配置文件位置.xml type-aliases-package: com.qfjy.bean # 对应的实体类的包名
6、启动类 Application
注意：@MapperScan(value="com.qfjy.mapper") 或接口上@Mapper各选一个
@SpringBootApplication@MapperScan(value = "com.qfjy.mapper")public class Boot2SsmApplication { public static void main(String[] args) { SpringApplication.run(Boot2SsmApplication.class, args); }}
7、异常注意事项
Loading class `com.mysql.jdbc.Driver'. This is deprecated. The new driver class is `com.mysql.cj.jdbc.Driver'. The driver is automatically registered via the SPI and manual loading of the driver class is generally unnecessary.2019-07-24 19:24:52.225 ERROR 8704 --- [ restartedMain] com.alibaba.druid.pool.DruidDataSource : init datasource error, url: jdbc:mysql://localhost:3306/maven_ssmjava.sql.SQLException: The server time zone value '�й���ʱ��' is unrecognized or represents more than one time zone. You must configure either the server or JDBC driver (via the serverTimezone configuration property) to use a more specifc time zone value if .................
使用Idea做jdbc的时候用了最新的mysql-connector-java-8.0.11库发现编码没有异常但是运行时出现了两个异常，如下
意思是 mysql.jdbc.driver被弃用了新的驱动类是“com.mysql.cjdbc.driver”。驱动程序通过SPI自动注册，而手动加载类通常是不必要的，解决方案如下：
把com.mysql.jdbc.Driver 改为com.mysql.cj.jdbc.Driver 即可
第二个异常是时区的错误，因此只你需要设置为你当前系统时区即可
?serverTimezone=GMT%2B8
完整如下：
spring: #数据源连接配置 datasource: name: test type: com.alibaba.druid.pool.DruidDataSource druid: #druid相关配置 url: jdbc:mysql://localhost:3306/maven_ssm?serverTimezone=GMT%2B8 driver-class-name: com.mysql.cj.jdbc.Driver username: root password: root