Spring Boot入門第三天：配置日志系統和Druid數據庫連接池。

 

一、日志管理

1.在application.properties文件中加入如下內容：

logging.level.root=WARN
logging.level.org.springframework.web=DEBUG
logging.file=/log/log/my.log
logging.pattern.console=%d{yyyy-MM-dd HH:mm:ss} [%thread] %-5level %logger- %msg%n
logging.pattern.file=%d{yyyy-MM-dd HH:mm:ss} [%thread] %-5level %logger- %msg%n

設置了日志輸出的級別，以及生成日志文件。再簡單一點的話，最后兩行也可以不要。

2.使用slf4j日志框架：

private static final Logger LOGGER = LoggerFactory.getLogger(UserController.class);

LOGGER.warn("您執行了UserController類中的userList2()方法。");

好了，不能寫太多了。

二、配置Druid

1.在pom.xml文件中添加druid依賴：

        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.0.26</version>
        </dependency>

2.添加配置類，直接拷貝了別人的代碼：

package com.yws710.springboot.demo1;

import com.alibaba.druid.support.http.StatViewServlet;
import com.alibaba.druid.support.http.WebStatFilter;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
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 java.util.HashMap;
import java.util.Map;

@Configuration
public class DruidConfiguration {

    private static final Logger LOGGER = LoggerFactory.getLogger(DruidConfiguration.class);

    @Bean
    public ServletRegistrationBean druidServlet() {
        LOGGER.info("init Druid Servlet Configuration ");
        ServletRegistrationBean servletRegistrationBean = new ServletRegistrationBean();
        servletRegistrationBean.setServlet(new StatViewServlet());
        servletRegistrationBean.addUrlMappings("/druid/*");
        Map<String, String> initParameters = new HashMap<String, String>();
        initParameters.put("loginUsername", "admin");// 用戶名
        initParameters.put("loginPassword", "admin");// 密碼
        initParameters.put("resetEnable", "false");// 禁用HTML頁面上的“Reset All”功能
        initParameters.put("allow", ""); // IP白名單 (沒有配置或者為空，則允許所有訪問)
        //initParameters.put("deny", "192.168.20.38");// IP黑名單 (存在共同時，deny優先於allow)
        servletRegistrationBean.setInitParameters(initParameters);
        return servletRegistrationBean;
    }

    @Bean
    public FilterRegistrationBean filterRegistrationBean() {
        FilterRegistrationBean filterRegistrationBean = new FilterRegistrationBean();
        filterRegistrationBean.setFilter(new WebStatFilter());
        filterRegistrationBean.addUrlPatterns("/*");
        filterRegistrationBean.addInitParameter("exclusions", "*.js,*.gif,*.jpg,*.png,*.css,*.ico,/druid/*");
        return filterRegistrationBean;
    }

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

}

3.添加配置文件，打開application.properties文件，加入如下代碼：

##Druid##
spring.datasource.type=com.alibaba.druid.pool.DruidDataSource
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.url=jdbc:mysql://localhost:3306/demo1?characterEncoding=UTF-8
spring.datasource.username=root
spring.datasource.password=123456

spring.datasource.initialSize=5
spring.datasource.minIdle=5
spring.datasource.maxActive=20
spring.datasource.maxWait=60000
spring.datasource.timeBetweenEvictionRunsMillis=60000
spring.datasource.minEvictableIdleTimeMillis=300000
spring.datasource.validationQuery=SELECT 1 FROM DUAL
spring.datasource.testWhileIdle=true
spring.datasource.testOnBorrow=false
spring.datasource.testOnReturn=false
spring.datasource.poolPreparedStatements=true
spring.datasource.maxPoolPreparedStatementPerConnectionSize=20
spring.datasource.filters=stat,wall,log4j
spring.datasource.connectionProperties=druid.stat.mergeSql=true;druid.stat.slowSqlMillis=5000
spring.datasource.useGlobalDataSourceStat=true


spring.jpa.properties.hibernate.hbm2ddl.auto=update
spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.MySQL5InnoDBDialect
spring.jpa.show-sql= true

 參考：https://github.com/alibaba/druid/

4.啟動項目。在瀏覽器地址欄中輸入http://localhost:8080/druid/

由於上面配置了用戶名和密碼，因此需要登錄：

登錄成功后的頁面就不截圖了，用過Druid的自然知道，沒用過的趕緊用啊，這么好的東西。