Spring cloud 开发中遇到的坑
一、版本问题，
在框架搭建之初一定要统一好spring版本兼容问题，具体可以去spring.io 进入spring cloud 的中有兼容版本介绍，要不然后期各种版本兼容问题会让心态不爽。
二、跨域问题的处理，每个service都要添加
1、需要的JAR
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>4.0.0</version>
</dependency>
<dependency>
<groupId>org.codehaus.jackson</groupId>
<artifactId>jackson-core-asl</artifactId>
<version>1.9.13</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>2.5</version>
</dependency>
2、在启动类里面添加
/**
* @return 跨域过滤器
* @author CRH
* @date 2018/12/5
*/
@Bean
public WebMvcConfigurer corsConfigurer() {
return new WebMvcConfigurerAdapter() {
@Override
public void addCorsMappings(CorsRegistry registry) {
registry.addMapping("/**")
.allowedOrigins("*")
.allowCredentials(true)
.allowedMethods("GET","POST","DELETE","PUT")
.maxAge(3600);
}
};
}
三、Eureka-Server 端的配置
启动类添加
@EnableEurekaServer注解
1、pom文件集成
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-eureka-server</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
2、application.yml的配置
server:
port: 1111
spring:
application:
name: eureka-service
eureka:
server:
enableSelfPreservation: false
instance:
hostname: localhost
prefer-ip-address: true
# leaseRenewalIntervalInSeconds: 1
# leaseExpirationDurationInSeconds: 2
client:
register-with-eureka: false
fetch-registry: false
service-url:
defaultZone: http://${eureka.instance.hostname}:${server.port}/eureka
Eureka-client的配置
启动类添加@EnableDiscoveryClient注解
pom的配置
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-eureka</artifactId>
</dependency>
applicaton.yml 配置
配置server时一定要注意两点（每个server）
一、必须配置spring.application.name （网关监听）
二、必须开放应用服务器注册IP地址（用来网关转发）
eureka:
client:
service-url:
defaultZone: http://127.0.0.1:1111/eureka #Eureka-Server地址以及端口名称
instance:
appname: sm-server #服务名
prefer-ip-address: true #IP地址注册服务
session共享问题
使用redis来做session共享，所有的service都配置
pom配置
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-redis</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.session</groupId>
<artifactId>spring-session-data-redis</artifactId>
</dependency>
appliaction.yml
spring:
redis:
host: 10.0.0.17
database: 8
pool:
max-active: 8
min-idle: 1
max-idle: 1
max-wait: -1
