使用Spring Cloud Gateway Server MVC进行路由

问题描述 投票：0回答：1

我正在使用 Spring boot、Spring Cloud Gateway Server MVC、thymeleaf、Java 11、Maven 设计应用程序，但我是 Spring Cloud Gateway 的新手

我的 Spring 应用程序包含以下依赖项

Pom.xml

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.7.17</version>
    <relativePath/> <!-- lookup parent from repository -->
</parent>

<groupId>com.example</groupId>
<artifactId>spring-cloud-gateway-server-mvc</artifactId>
<version>0.0.1-SNAPSHOT</version>


<properties>
    <java.version>11</java.version>
    <spring-cloud.version>2021.0.8</spring-cloud.version>
</properties>


<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-actuator</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>

    <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-starter-gateway</artifactId>
        <version>3.1.8</version>
    </dependency>

    <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-gateway-mvc</artifactId>
        <version>3.1.8</version>
    </dependency>

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
        <scope>test</scope>
    </dependency>

    <dependency>
        <groupId>org.apache.tomcat</groupId>
        <artifactId>tomcat-jasper</artifactId>
        <version>9.0.82</version>
    </dependency>

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-devtools</artifactId>
        <scope>runtime</scope>
        <optional>true</optional>
    </dependency>

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-thymeleaf</artifactId>
    </dependency>
    
    <dependency>
        <groupId>com.fasterxml.jackson.module</groupId>
        <artifactId>jackson-module-afterburner</artifactId>
        <version>2.14.2</version>
    </dependency>

    <dependency>
        <groupId>io.projectreactor</groupId>
        <artifactId>reactor-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>
网关配置.java 
package com.commonapplication.controller;

  import org.springframework.cloud.gateway.route.RouteLocator;
  import org.springframework.cloud.gateway.route.builder.RouteLocatorBuilder;
  import org.springframework.context.annotation.Bean;
  import org.springframework.context.annotation.Configuration;
  @Configuration
  public class GatewayConfiguration {

    @Bean

    public RouteLocator customRouteLocator(RouteLocatorBuilder builder){
        return builder.routes().
                route("example_route",r->r
                                                .path("/demo1/**")
                                                .uri("http://localhost:8090/demo1Service1"))
                .build();

       
    }

应用程序.属性

logging.level.org.springframework.web=debug
logging.level.org.springframework.cloud.gateway.handler.RoutePredicateHandlerMapping= TRACE
spring.main.web-application-type=reactive

CommonApplication.java

package com.commonapplication;

@SpringBootApplication
public class CommonApplication  {

    public static void main(String[] args) {
        SpringApplication.run(CommonApplication.class, args);
        
    }
}

StartUpController.java

package com.commonapplication.controller;


import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.*;
import java.util.HashMap;
import java.util.List;

@Controller

public class StartUpController {
    
     @RequestMapping(value="/index",method=RequestMethod.GET) 
     public String index() {
         return "index";
     }

}

代码包含 src->resources->template 中的index.html 文件。 当从浏览器点击“localhost:8080/index”时。 index.html 已正确加载。此 UI 包含一个按钮。单击此按钮后，我的应用程序将点击“localhost:8080/demo1/service1”。路由是在 GatewayConfiguration.java 文件中为路径“demo1/**”定义的，以映射到在 localhost:8090 上运行的应用程序。 运行 localhost:8090 的映射应用程序的代码是

应用程序.属性

server.port=8090
spring.mvc.view.prefix=/WEB-INF/jsp/
spring.mvc.view.suffix=.jsp

pom.xml

<?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 https://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>2.7.17</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.example.demo1</groupId>
    <artifactId>demo1</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>demo1</name>
    <description>Demo project for Spring Boot</description>
    <properties>
        <java.version>11</java.version>
        <spring-cloud.version>2021.0.8</spring-cloud.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>


        <dependency>
            <groupId>org.apache.tomcat</groupId>
            <artifactId>tomcat-jasper</artifactId>
            <version>9.0.82</version>
        </dependency>


        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>jstl</artifactId>
        </dependency>



    </dependencies>
        

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

Demo1Application.java

package com.example.demo1;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class Demo1Application {

    public static void main(String[] args) {
        SpringApplication.run(Demo1Application.class, args);
    }

}

Demo1Controller.java

package com.example.demo1.controller;

import org.springframework.stereotype.Controller;
import org.springframework.ui.ModelMap;
import org.springframework.web.bind.annotation.*;

@RestController

public class Demo1Controller {
    @RequestMapping(value="/demo1Index",method= RequestMethod.GET)
    public String index(ModelMap map) {
        return "demo1Index";
    }

    @RequestMapping(value="/demo1Service1",method= RequestMethod.GET)
    @ResponseBody
    public String demoS1() {
        System.out.println("Demo 1 is working.");
        return "demo1 is working";
    }

}

点击按钮后，我会在日志中看到以下几行：

2023-11-24 13:45:45.223 DEBUG 12936 --- [nio-8080-exec-5] o.s.c.g.h.RoutePredicateHandlerMapping   : Mapping [Exchange: GET http://localhost:8080/demo1/service1?_=1700813739548] to Route{id='example_route', uri=http://localhost:8090/demo1Service1, order=0, predicate=Paths: [/demo1/**], match trailing slash: true, gatewayFilters=[], metadata={}}
2023-11-24 13:45:45.223 DEBUG 12936 --- [nio-8080-exec-5] o.s.c.g.h.RoutePredicateHandlerMapping   : [19d35c9c] Mapped to org.springframework.cloud.gateway.handler.FilteringWebHandler@23adefa8
2023-11-24 13:45:45.827 DEBUG 12936 --- [ctor-http-nio-2] o.s.w.s.adapter.HttpWebHandlerAdapter    : [19d35c9c] Completed 404 NOT_FOUND

我无法理解为什么我的网关找不到我在 8090 上运行的服务。我已经参考了很多示例，但每个示例都包含 eureka 服务器的使用。我是 Spring Cloud Gateway 的新手，所以我不确定这个应用程序是否可以在没有 eureka 服务器的情况下工作。另外，这里我使用 Spring Cloud Gateway Server MVC 而不是 Spring Cloud Gateway

spring-boot maven java-11 spring-cloud-gateway
1个回答
0
投票

在 Spring-cloud-gateway-server jar 中调试后发现错误。 将 GatewayConfiguration.java 中的路径更改为 .path("/demo1Service") 并将 uri 更改为 .uri("http://localhost:8090")。现在，当我点击 url htt://localhost:8080/demo1Service 时，它已成功路由到 http://localhost:8090/demo1Service。

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