1, Dependence

To test, use the JDBC template

<!-- jdbcTemplate -->
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-jdbc</artifactId>
</dependency>

<!-- druid Database connection pool -->
<dependency>
    <groupId>com.alibaba</groupId>
    <artifactId>druid</artifactId>
    <version>1.0.26</version>
</dependency>

<!-- mysql connector -->
<dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
    <scope>runtime</scope>
</dependency>

• 1
• 2
• 3
• 4
• 5
• 6
• 7
• 8
• 9
• 10
• 11
• 12
• 13
• 14
• 15
• 16
• 17
• 18
• 19

2, Druid configuration

druid.properties

#Database settings
spring.datasource.driverClassName=com.mysql.jdbc.Driver
spring.datasource.url=jdbc:mysql://localhost:3306/uu_core?useUnicode=true&characterEncoding=utf8&autoReconnect=true&useSSL=true
spring.datasource.username=root
spring.datasource.password=root
#--------------------------
# The following is the supplementary settings of the connection pool, which are applied to all data sources above
# Initialization size, min, Max
spring.datasource.initialSize=5
spring.datasource.minIdle=1
spring.datasource.maxActive=50
# Configure the timeout time for getting connection waiting
spring.datasource.maxWait=60000
# Configure how often to check the interval. Check the idle connections that need to be closed, in milliseconds
spring.datasource.timeBetweenEvictionRunsMillis=60000
# Configure the minimum lifetime of a connection in the pool, in milliseconds
spring.datasource.minEvictableIdleTimeMillis=300000
spring.datasource.validationQuery=SELECT 1 FROM DUAL
spring.datasource.testWhileIdle=true
spring.datasource.testOnBorrow=false
spring.datasource.testOnReturn=false
# Open PSCache and specify the size of PSCache on each connection
spring.datasource.poolPreparedStatements=false
#spring.datasource.maxPoolPreparedStatementPerConnectionSize=20
# Configure the filters intercepted by monitoring statistics. After the filters are removed, the monitoring interface sql cannot be counted. The 'wall' is used for the firewall
spring.datasource.filters=stat,wall,log4j
# Open mergeSql function through connectProperties property; slow SQL record
spring.datasource.connectionProperties=druid.stat.mergeSql=true;druid.stat.slowSqlMillis=5000
# Merge monitoring data from multiple druiddatasources
#spring.datasource.useGlobalDataSourceStat=true

• 1
• 2
• 3
• 4
• 5
• 6
• 7
• 8
• 9
• 10
• 11
• 12
• 13
• 14
• 15
• 16
• 17
• 18
• 19
• 20
• 21
• 22
• 23
• 24
• 25
• 26
• 27
• 28
• 29
• 30
• 31

3, Instantiate Druid Datasource

package cn.aduu.config;

import com.alibaba.druid.pool.DruidDataSource;
import com.alibaba.druid.support.http.StatViewServlet;
import com.alibaba.druid.support.http.WebStatFilter;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.boot.web.servlet.FilterRegistrationBean;
import org.springframework.boot.web.servlet.ServletRegistrationBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.PropertySource;

import javax.sql.DataSource;

/**
 * @author zh
 * @ClassName cn.aduu.config.DruidConfiguration
 * @Description
 */
@Configuration
@PropertySource(value = "classpath:druid.properties")
public class DruidConfiguration {

    @Bean(destroyMethod = "close", initMethod = "init")
    @ConfigurationProperties(prefix = "spring.datasource")
    public DataSource druidDataSource() {
        DruidDataSource druidDataSource = new DruidDataSource();
        return druidDataSource;
    }

    /**
     * Register a StatViewServlet
     * @return
     */
    @Bean
    public ServletRegistrationBean druidStatViewServlet(){
        //org.springframework.boot.context.embedded.ServletRegistrationBean provides class registration
        ServletRegistrationBean servletRegistrationBean = new ServletRegistrationBean(new StatViewServlet(),"/druid/*");

        //Add initialization parameter: initParams
        //White list:
        servletRegistrationBean.addInitParameter("allow","127.0.0.1");
        //IP Blacklist (deny takes precedence over allow when there is a common one): if deny is satisfied, prompt: sorry, you are not allowed to view this page
        servletRegistrationBean.addInitParameter("deny","192.168.1.73");
        //Login to view the account password of the information
        servletRegistrationBean.addInitParameter("loginUsername","admin");
        servletRegistrationBean.addInitParameter("loginPassword","123456");
        //Whether the data can be reset
        servletRegistrationBean.addInitParameter("resetEnable","false");
        return servletRegistrationBean;
    }

    /**
     * Register a: filterRegistrationBean
     * @return
     */
    @Bean
    public FilterRegistrationBean druidStatFilter(){

        FilterRegistrationBean filterRegistrationBean = new FilterRegistrationBean(new WebStatFilter());

        //Add filter rule
        filterRegistrationBean.addUrlPatterns("/*");

        //Add formatting information that does not need to be ignored
        filterRegistrationBean.addInitParameter("exclusions","*.js,*.gif,*.jpg,*.png,*.css,*.ico,/druid/*");
        return filterRegistrationBean;
    }
}

• 1
• 2
• 3
• 4
• 5
• 6
• 7
• 8
• 9
• 10
• 11
• 12
• 13
• 14
• 15
• 16
• 17
• 18
• 19
• 20
• 21
• 22
• 23
• 24
• 25
• 26
• 27
• 28
• 29
• 30
• 31
• 32
• 33
• 34
• 35
• 36
• 37
• 38
• 39
• 40
• 41
• 42
• 43
• 44
• 45
• 46
• 47
• 48
• 49
• 50
• 51
• 52
• 53
• 54
• 55
• 56
• 57
• 58
• 59
• 60
• 61
• 62
• 63
• 64
• 65
• 66
• 67
• 68
• 69
• 70

4, Monitoring

Visit http://localhost:8080/druid , use the account password configured above.

5, Testing

@RestController
public class HelloController{

    private static final Logger logger = LoggerFactory.getLogger(HelloController.class);

    @Autowired
    private JdbcTemplate jdbcTemplate;

    @RequestMapping("hello")
    public List<Map<String, Object>> hello() {
        List<Map<String, Object>> list = jdbcTemplate.queryForList("SELECT user,password FROM mysql.user ", new Object[]{});
        return list;
    }
}

• 1
• 2
• 3
• 4
• 5
• 6
• 7
• 8
• 9
• 10
• 11
• 12
• 13
• 14

Visit localhost:8080/hello

[
    {
        "user": "root",
        "password": "*81F5E21E35407D884A6CD4A731AEBFB6AF209E1B"
    },
    {
        "user": "root",
        "password": "*81F5E21E35407D884A6CD4A731AEBFB6AF209E1B"
    }
]

• 1
• 2
• 3
• 4
• 5
• 6
• 7
• 8
• 9
• 10