Spring-boot整合Druid以及遇到的404等问题

1.导入依赖

		<dependency>
		    <groupId>com.alibaba</groupId>
		    <artifactId>druid-spring-boot-starter</artifactId>
		    <version>1.1.20</version>
		</dependency>

（如果后续访问监控页面报404，可以试着将版本降低试试）

2.编写配置文件

spring:
  datasource:
    username: root
    password: root 
    url: jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=UTF-8&serverTimezone=UTC
    driver-class-name: com.mysql.cj.jdbc.Driver
    type: com.alibaba.druid.pool.DruidDataSource
    druid: 
      initialSize: 5
      minIdle: 5
      maxActive: 20
      maxWait: 60000
      timeBetweenEvictionRunsMillis: 60000
      minEvictableIdleTimeMillis: 300000
      validationQuery: SELECT 1 FROM DUAL
      testWhileIdle: true
      testOnBorrow: false
      testOnReturn: false
      # 打开PSCache
      poolPreparedStatements: true
      #配置监控统计拦截的filters，stat:监控统计、slf4j：日志记录、wall：防御sql注入
      filters: stat,wall,slf4j,config
      #指定每个连接上PSCache的大小
      maxPoolPreparedStatementPerConnectionSize: 20
      #合并多个DruidDataSource的监控数据
      useGlobalDataSourceStat: true
      #通过connectProperties属性来打开mergeSql功能；慢SQL记录
      connectionProperties: druid.stat.mergeSql=true;druid.stat.slowSqlMillis=5000

3.编写配置类

@Configuration
public class DruidConfig {
	@ConfigurationProperties(prefix = "spring.datasource")
	@Bean
    public DataSource druidDataSource(){
        return new DruidDataSource();
    }
	//Druid监控
	//1.配置一个管理后台的Servlet
	@Bean
	public ServletRegistrationBean<StatViewServlet> registrationBean(){
		ServletRegistrationBean<StatViewServlet> bean=new ServletRegistrationBean<>(new StatViewServlet());
		bean.addUrlMappings("/druid/*");
		Map<String,String> initParams=new HashMap<String,String>();
		initParams.put("loginUsername", "admin");//账户密码是固定的
		initParams.put("loginPassword", "123456");
		initParams.put("allow", "");//这个值为空就允许所有人访问
		bean.setInitParameters(initParams);
		return bean;
	}
	//2.配置一个web监控的Filter
	@Bean
	public FilterRegistrationBean<WebStatFilter>filterRegistrationBean(){
		FilterRegistrationBean<WebStatFilter> bean=new FilterRegistrationBean<>();
		bean.setFilter(new WebStatFilter());
		bean.addUrlPatterns("/*");
		//可以过滤和排除哪些东西
        Map<String,String> initParams = new HashMap<String,String>();
        //把不需要监控的过滤掉,这些不进行统计
        initParams.put("exclusions","*.js,*.css,/druid/*");
        bean.setInitParameters(initParams);
        return bean;
	}

4.启动项目访问http://localhost:服务端口/druid/login.html

如果配置了项目路径，例如：

server:
  servlet:  
    context-path: /test

那么访问 http://localhost:服务端口/项目名/druid/login.html

登录界面

输入账号：admin 密码：123456