spring-cloud配置zuul网关及配置网关过滤器

╰半橙微兮° 2022-03-26 13:00 246阅读 0赞

首先先创建项目，选择左侧的导航栏的**Spring Initializr**，然后默认是Default选项。

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对项目信息进行编辑，填写组织名和项目名。

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选择Cloud Discovery，然后右侧选择Eureka Discovery(因为创建的是客户端，所以选择Discovery)。

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编辑项目名及存放路径，然后下一步就创建完项目了：

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创建好的项目展示：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MTU5NTcwMA_size_16_color_FFFFFF_t_70 4][]

接下来配置文件：

往pom.xml文件添加所需jar包和配置，请大家根据版本选择(我用的是Dalston，所以parent标签里的version是1.5.x版本，spring-cloud.version是Dalston)：

![20190115211757895.jpg][]

<?xml version="1.0" encoding="UTF-8"?>
    <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
             xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
        <modelVersion>4.0.0</modelVersion>
        <parent>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-parent</artifactId>
            <version>1.5.6.RELEASE</version>
            <relativePath/> 
        </parent>
        <groupId>com.spring-cloud</groupId>
        <artifactId>springboot-eureka-zuul</artifactId>
        <version>0.0.1-SNAPSHOT</version>
        <name>springboot-eureka-zuul</name>
        <description>Demo project for Spring Boot</description>
    
        <properties>
            <java.version>1.8</java.version>
            <spring-cloud.version>Dalston.SR4</spring-cloud.version>
        </properties>
    
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-starter-eureka</artifactId>
            </dependency>
    
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-starter-zuul</artifactId>
            </dependency>
    
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-test</artifactId>
                <scope>test</scope>
            </dependency>
        </dependencies>
    
        <dependencyManagement>
            <dependencies>
                <dependency>
                    <groupId>org.springframework.cloud</groupId>
                    <artifactId>spring-cloud-dependencies</artifactId>
                    <version>${spring-cloud.version}</version>
                    <type>pom</type>
                    <scope>import</scope>
                </dependency>
            </dependencies>
        </dependencyManagement>
    
        <build>
            <plugins>
                <plugin>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-maven-plugin</artifactId>
                </plugin>
            </plugins>
        </build>
    
        <repositories>
            <repository>
                <id>spring-milestones</id>
                <name>Spring Milestones</name>
                <url>https://repo.spring.io/milestone</url>
            </repository>
        </repositories>
    
    </project>

往SpringbootEurekaZuulApplication文件加入注解：

@EnableZuulProxy

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接下来在resources文件下的application.properties(我把后缀改成yml，效果相同)配置代码：

#端口号
    server:
      port: 7100
    spring:
    #应用名称
      application:
        name: tencent-zuul
    eureka:
      client:
    #默认路径
        service-url:
          defaultZone: http://root:111111@localhost:7000/eureka/
    #配置网关
    zuul:
    #访问加上/user/请求名称，便会跳到tencent-user-customer里的方法里
      routes:
        tencent-user-customer: /user/**

然后将服务中心，供应者，消费者启动，访问(访问时要加上/user/，网关其实就像一种委托，供应者委托给网关，消费者从网关访问然后由网关跳到供应者显示)：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MTU5NTcwMA_size_16_color_FFFFFF_t_70 6][]

接下来给网关加过滤器，有四种过滤器(pre，route，postroute，error)，这里配置的是pre过滤器，可以利用过滤器来实现一些功能(比如登录，令牌判断)：

![20190118115259248.jpg][]

package com.springcloud.springbooteurekazuul.filter;
    
    import com.netflix.zuul.ZuulFilter;
    import com.netflix.zuul.context.RequestContext;
    import org.springframework.cloud.netflix.zuul.filters.support.FilterConstants;
    import org.springframework.stereotype.Component;
    
    import javax.servlet.http.HttpServletRequest;
    
    @Component
    public class PreFilter extends ZuulFilter {
        @Override
        public String filterType() {  //过滤器类型
            return FilterConstants.PRE_TYPE;
        }
    
        @Override
        public int filterOrder() {  //过滤器优先级
            return 1;
        }
    
        @Override
        public boolean shouldFilter() {  //过滤器是否启用
            return true;
        }
    
        @Override
        public Object run() {  //执行的方法
            RequestContext ctx = RequestContext.getCurrentContext();
            HttpServletRequest request = ctx.getRequest();
            String token = request.getHeader("token");
            if(null == token || "".equals(token)){
                ctx.setSendZuulResponse(false);
                ctx.setResponseStatusCode(401);
                ctx.setResponseBody("token is not found");
            }
            return null;
        }
    }

然后将服务中心，供应者，消费者，网关启动，没有令牌时，页面提示：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MTU5NTcwMA_size_16_color_FFFFFF_t_70 7][]

当带上令牌后测试(使用的是postMan工具，测试方便)：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MTU5NTcwMA_size_16_color_FFFFFF_t_70 8][]

当然，还可以配置多个过滤器，当你想禁用其中的一个时，只需在application.yml文件里加上：

#禁用过滤器
    ThirdFilter: #想禁用的过滤器名称
      pre:
        #是否禁用
        disable: true

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MTU5NTcwMA_size_16_color_FFFFFF_t_70 9][]

--------------------

其他配置链接：

[spring-cloud配置：服务中心][spring-cloud]

[spring-cloud供应者消费者模式(下)：配置消费者][spring-cloud 1]

[spring-cloud供应者消费者模式(上)：配置供应者][spring-cloud 2]

[spring-cloud负载均衡配置][spring-cloud 3]

[spring-cloud熔断机制][spring-cloud 4]

[spring-cloud配置config server配置中心][spring-cloud_config server]

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[20190115211757895.jpg]: /images/20220326/34fb716372c74ea7a9bc81593176516a.png
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[20190118115259248.jpg]: /images/20220326/61aa2379eb314ab295828b4c8191ab16.png
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[spring-cloud]: https://blog.csdn.net/weixin_41595700/article/details/86499101
[spring-cloud 1]: https://blog.csdn.net/weixin_41595700/article/details/86502580
[spring-cloud 2]: https://blog.csdn.net/weixin_41595700/article/details/86501888
[spring-cloud 3]: https://blog.csdn.net/weixin_41595700/article/details/86520049
[spring-cloud 4]: https://blog.csdn.net/weixin_41595700/article/details/86509737
[spring-cloud_config server]: https://blog.csdn.net/weixin_41595700/article/details/86601860