24, springboot-- integration Mybatis of creating the project, build environment ①

First, create a project and build environment:

 　　1) Create maven coordinate the project needed

 

 This mybatis the starter is out mybatis official adapt springboot

 

FIG be learned by this dependence is introduced which packages

 

　　 2), a data connection pool

　　Introducing data connection pool Druid

　　　　　　<!--引入druid数据源-->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.1.10</version>
        </dependency>

　　 3), the data connection pool configuration

　　application.yml profile settings:

　　Still Druid configuration

Spring: 
  DataSource: 
    # basic configuration of the data source 
    username: the root 
    password: 123 
    Driver-class-name: com.mysql.jdbc.Driver 
    URL: JDBC: MySQL: // localhost: 3306 / springbootmybatis 
    type: com.alibaba.druid.pool .DruidDataSource 
    # data sources other configuration 
    initialSize:. 5 
    minIdle:. 5 
    for maxActive: 20 is 
    maxWait: 60000 
    timeBetweenEvictionRunsMillis: 60000 
    minEvictableIdleTimeMillis: 300000 
    validationQuery: the SELECT the FROM. 1 the DUAL 
    testWhileIdle: to true 
    testOnBorrow: to false 
    testOnReturn: to false 
    poolPreparedStatements: to true  
    # configure the monitoring statistics interception filters after removing the monitoring interface sql not statistics, 'wall' for firewall
    Filters: STAT, Wall
    maxPoolPreparedStatementPerConnectionSize: 20
    useGlobalDataSourceStat: true
    connectionProperties: druid.stat.mergeSql=true;druid.stat.slowSqlMillis=500

　　4, the data source is added to the vessel, only the configuration data from the configuration of monitoring control effect +

@Configuration
 public  class DruidConfig { 

    @ConfigurationProperties (prefix = " spring.datasource " ) 
    @Bean 
    public the DataSource Druid () {
        return  new new DruidDataSource (); 
    } 

    // arranged to monitor data sources Durid
     // 1, a configuration management background of the Servlet 
    @ bean
     public ServletRegistrationBean statViewServlet () { 
        ServletRegistrationBean the bean = new new ServletRegistrationBean ( new new StatViewServlet (), "/ Druid / *" ); 
        the Map <String, String> = the InitParameters new newThe HashMap <> (); 

        initParameters.put ( "loginUsername", "the root" ); 
        initParameters.put ( "loginPassword", "123" );
         // allow access, the default can access all 
        initParameters.put ( "allow", ""); // default is to allow all access
         // to prevent access 
        initParameters.put ( "deny", "192.168.15.21" );
         // set the initialization parameters 
        bean.setInitParameters (the InitParameters);
         return bean;
    } 

    // 2, a configuration monitoring the Filter 
    @Bean
     public FilterRegistrationBean webStatFilter () { 
        FilterRegistrationBean the bean =new new FilterRegistrationBean (); 
        bean.setFilter ( new new WebStatFilter ()); 
        the Map <String, String> = the InitParameters new new the HashMap <> ();
         // excluded intercepted request 
        . initParameters.put ( "exclusions", " * js, * CSS, / Druid / * " );
         // set the initialization parameters 
        bean.setInitParameters (the InitParameters);
         // intercepted request 
        bean.setUrlPatterns (Arrays.asList (" / * " ));
         return the bean; 
    } 
}

　　5. After the above configuration to run these applications to access druid of login.html page to see if there is configured successfully

 　　6, create a database table

　　application.yml configuration ( the red part followed by a need to add springboot2.x )

Spring: 
  DataSource: 
    # basic configuration of the data source 
    username: the root 
    password: 123 
    Driver-class-name: com.mysql.cj.jdbc.Driver 
    URL: JDBC: MySQL: // localhost: 3306 / springbootmybatis serverTimezone = UTC? 
    type: COM .alibaba.druid.pool.DruidDataSource 
    # data sources other configuration 
    initialSize:. 5 
    minIdle:. 5 
    for maxActive: 20 is 
    maxWait: 60000 
    timeBetweenEvictionRunsMillis: 60000 
    minEvictableIdleTimeMillis: 300000 
    validationQuery: the SELECT the FROM. 1 the DUAL 
    testWhileIdle: to true 
    testOnBorrow: to false 
    testOnReturn: to false 
    poolPreparedStatements: to true
    # Configure monitoring statistics intercepted filters, after removing the monitoring interface sql not statistics, 'wall' for Firewall 
    Filters: STAT, Wall 
    maxPoolPreparedStatementPerConnectionSize: 20 
    useGlobalDataSourceStat: to true 
    ConnectionProperties: druid.stat.mergeSql = to true; druid.stat.slowSqlMillis = 500     Schema: 
      - CLASSPATH: SQL / department.sql 
      - CLASSPATH: SQL / employee.sql Initialization-MODE: Always

    

　　sql file will be built into the table specified path

 　　At this point after starting the project has been built database tables

After put application.yml table built in the schema: configuration commented out; otherwise every time you start the project will then delete the original table New Table

　　 7, create the corresponding javabean class

public class Employee {
    private Integer id;
    private String lastName;
    private Integer gender;
    private String email;
    private Integer dId;
.....
}

public class Department {
    private Integer id;
    private String departmentName;
...
}