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关于 druid 监控的两个小问题

2025年3月12日 发表评论 阅读评论

前一段时间做一个小需求，需要展示 druid 的监控页面，我们都知道 druid 监控地址是：http://ip:port/druid/index.html，但是当时一直报 404，后来查了资料，引入的 jar 包：

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<dependency>
    <groupId>com.alibaba</groupId>
    <artifactId>druid</artifactId>
    <version>1.2.24</version>
</dependency>

应该是因为不是通过 starter 包引入的，所以需要手动配置：

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package cn.bridgeli.demo;
 
import com.alibaba.druid.support.jakarta.StatViewServlet;
import com.alibaba.druid.support.jakarta.WebStatFilter;
import com.alibaba.druid.util.Utils;
import jakarta.servlet.Filter;
import jakarta.servlet.FilterChain;
import jakarta.servlet.ServletException;
import jakarta.servlet.ServletRequest;
import jakarta.servlet.ServletResponse;
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.io.IOException;
 
@Configuration
public class DruidConfig {
 
    @Bean
    public ServletRegistrationBean<StatViewServlet> statViewServlet() {
        ServletRegistrationBean<StatViewServlet> servletRegistrationBean = new ServletRegistrationBean<>(new StatViewServlet(), "/druid/*");
        // 设置登录用户名和密码
        servletRegistrationBean.addInitParameter("loginUsername", "BridgeLi");
        servletRegistrationBean.addInitParameter("loginPassword", "BridgeLi");
        return servletRegistrationBean;
    }
 
    @Bean
    public FilterRegistrationBean<WebStatFilter> webStatFilter() {
        FilterRegistrationBean<WebStatFilter> filterRegistrationBean = new FilterRegistrationBean<>(new WebStatFilter());
        filterRegistrationBean.addUrlPatterns("/*");
        filterRegistrationBean.addInitParameter("exclusions", "*.js,*.gif,*.jpg,*.png,*.css,*.ico,/druid/*");
        return filterRegistrationBean;
    }
 
}

另外一个小问题就是，这么引入之后，打开监控页最下面会有 alibaba 的广告，一般情况下，我们肯定是想去掉的，广告代码所在的位置在 support/http/resources/js/common.js 这个 js 里面，网上有人说直接解压删掉，重新打包就行了，但是这个有问题就是必须用重新打包的这个 jar，搜了一下资料，其实去掉也很简单，在上面的那个类里面增加一个 配置过滤掉即可：

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@Bean
public FilterRegistrationBean<Filter> removeDruidAdFilterRegistrationBean() {
    // 获取web监控页面的参数
    // 提取common.js的配置路径
    String pattern = "/druid/*";
    String commonJsPattern = pattern.replaceAll("\\*", "js/common.js");
    final String filePath = "support/http/resources/js/common.js";
    // 创建filter进行过滤
    Filter filter = new Filter() {
        @Override
        public void init(jakarta.servlet.FilterConfig filterConfig) throws ServletException {
        }
 
        @Override
        public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
                throws IOException, ServletException {
            chain.doFilter(request, response);
            // 重置缓冲区，响应头不会被重置
            response.resetBuffer();
            // 获取common.js
            String text = Utils.readFromResource(filePath);
            // 正则替换banner, 除去底部的广告信息
            text = text.replaceAll("<a.*?banner\"></a><br/>", "");
            text = text.replaceAll("powered.*?shrek.wang</a>", "");
            response.getWriter().write(text);
        }
 
        @Override
        public void destroy() {
        }
    };
    FilterRegistrationBean<Filter> registrationBean = new FilterRegistrationBean<>();
    registrationBean.setFilter(filter);
    registrationBean.addUrlPatterns(commonJsPattern);
    return registrationBean;
}

如果是引入的 starter 也可以把方法的声明改成下面这种：

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@SuppressWarnings({"rawtypes", "unchecked"})
@Bean
@ConditionalOnProperty(name = "spring.datasource.druid.statViewServlet.enabled", havingValue = "true")
public FilterRegistrationBean removeDruidFilterRegistrationBean(DruidStatProperties properties) {
    // 获取web监控页面的参数
    DruidStatProperties.StatViewServlet config = properties.getStatViewServlet();
    // 提取common.js的配置路径
    String pattern = config.getUrlPattern() != null ? config.getUrlPattern() : "/druid/*";
    String commonJsPattern = pattern.replaceAll("\\*", "js/common.js");
    final String filePath = "support/http/resources/js/common.js";
    // 创建filter进行过滤
    Filter filter = new Filter() {
        @Override
        public void init(javax.servlet.FilterConfig filterConfig) throws ServletException {
        }
 
        @Override
        public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
                throws IOException, ServletException {
            chain.doFilter(request, response);
            // 重置缓冲区，响应头不会被重置
            response.resetBuffer();
            // 获取common.js
            String text = Utils.readFromResource(filePath);
            // 正则替换banner, 除去底部的广告信息
            text = text.replaceAll("<a.*?banner\"></a><br/>", "");
            text = text.replaceAll("powered.*?shrek.wang</a>", "");
            response.getWriter().write(text);
        }
 
        @Override
        public void destroy() {
        }
    };
    FilterRegistrationBean registrationBean = new FilterRegistrationBean();
    registrationBean.setFilter(filter);
    registrationBean.addUrlPatterns(commonJsPattern);
    return registrationBean;
}

其实就是怎么拿到 common.js 而已。

全文完，如果本文对您有所帮助，请花 1 秒钟帮忙点击一下广告，谢谢。

作 者： BridgeLi，https://www.bridgeli.cn
原文链接：http://www.bridgeli.cn/archives/778
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