物联网架构成长之路(17)-SpringCloud目前遇到的注意事项

1. STS插件最好是要安装的.

2. 对应的Decompiler插件也是要安装的.

3. 如果遇到maven工程因为找不到包问题的, 在确认pom.xml 文件没有问题的情况下, 右键项目-Maven-Update Project 然后点击OK,更新一下工程,
　　还不行的 点击 Force Update of Snapshots/Releases
　　还不行的 删除.m2 Maven下载目录下的本地仓库所有文件,重新更新下载一遍
　　还不行的 在报错的Markers页签 右键删除报错信息
　　然后重新运行Spring Cloud

4.Spring-cloud 项目加入eureka后, restcontroller 默认返回的是xml格式,需要自定义一个配置类

 @Configuration
 public class WebMvcConfig extends WebMvcConfigurerAdapter {

     //解决spring-cloud 加载eureka后, restcontroller 默认返回xml格式
     @Override
     public void configureContentNegotiation(ContentNegotiationConfigurer configurer) {
         configurer.ignoreAcceptHeader(true).defaultContentType(MediaType.APPLICATION_JSON);
         super.configureContentNegotiation(configurer);
     }
 }

5. 如果需要在项目一启动,就执行某些代码,可以增加如下的监听器代码

 @Component
 public class OnStartListener implements ApplicationListener<ContextRefreshedEvent> {

     @Override
     public void onApplicationEvent(ContextRefreshedEvent event) {
         System.out.println(event.getApplicationContext().getParent());
         System.out.println("on start: " + System.currentTimeMillis());
     }

 }

6.启动事务时,要在启动类加入一些注解

 /**
  * 启动类
  * @author wunaozai
  * MapperScan : 扫描的是mapper.xml中namespace指向的包位置
  * EnableTransactionManagement : 加入事务
  * 加入@Transaction 事务处理后, spring 会启用动态代理方式,
  * 所以在EnableTransactionManagement 要增加proxyTargetClass
  */
 @EnableEurekaClient
 @SpringBootApplication
 @EnableTransactionManagement(proxyTargetClass=true)
 @MapperScan("com.wunaozai.xxx.center.mapper")
 public class ServiceDeveloperCenterApplication {

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

7.项目中各个文件夹(包名)都最好按照默认的约定的来,不要自己乱改.

8.一份简单的application.properties

 spring.application.name=service-developer-center

 #server
 server.port=9200
 server.session.timeout=360000
 server.session.cookie.name=IOT

 #eureka
 eureka.client.serviceUrl.defaultZone=http://172.16.23.203:9000/eureka/
 eureka.instance.prefer-ip-address=true
 eureka.instance.instance-id=${spring.cloud.client.ipAddress}:${server.port}

 #logging
 logging.path=log
 logging.level.com.favorites=INFO
 logging.level.org.springframework.web=INFO

 #datasource
 spring.datasource.url=jdbc:postgresql://172.16.23.202:5432/service_developer_center
 spring.datasource.username=postgres
 spring.datasource.password=
 spring.datasource.driverClassName=org.postgresql.Driver

 #mybatis
 mybatis.type-aliases-package=com.wunaozai.xxx.center.model
 mybatis.mapper-locations=classpath:com/wunaozai/xxx/center/mapper/*.xml

 #pagehelper
 pagehelper.helperDialect=postgresql
 pagehelper.reasonable=true
 pagehelper.supportMethodsArguments=true
 pagehelper.returnPageInfo=check

 #redis
 spring.redis.database=0
 spring.redis.host=172.16.20.229
 spring.redis.port=6379
 spring.redis.password=
 spring.redis.timeout=0
 spring.redis.pool.max-active=8
 spring.redis.pool.max-wait=-1
 spring.redis.pool.max-idle=8
 spring.redis.pool.min-idle=0
 spring.cache.type=Redis

 #thymeleaf
 spring.thymeleaf.mode=HTML5
 spring.thymeleaf.encoding=UTF-8
 spring.thymeleaf.content-type=text/html
 spring.thymeleaf.cache=false

 #upload max file size
 spring.http.multipart.maxFileSize=25Mb
 spring.http.multipart.maxRequestSize=50Mb

 #email config
 spring.mail.host=192.168.8.208
 spring.mail.username=xxx@wunaozai.com
 spring.mail.password=
 srping.mail.default-encoding=UTF-8

9.一份简单的 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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <modelVersion>4.0.0</modelVersion>

     <groupId>com.wunaozai.center</groupId>
     <artifactId>service-developer-center</artifactId>
     <version>0.0.1</version>
     <packaging>jar</packaging>

     <name>service-developer-center</name>
     <description>XXX开发者中心</description>

     <parent>
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-starter-parent</artifactId>
         <version>1.5.9.RELEASE</version>
         <relativePath/> <!-- lookup parent from repository -->
     </parent>

     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
         <java.version>1.8</java.version>
         <spring-cloud.version>Edgware.SR1</spring-cloud.version>
     </properties>

     <dependencies>
         <dependency>
             <groupId>org.springframework.cloud</groupId>
             <artifactId>spring-cloud-starter-eureka-server</artifactId>
         </dependency>
         <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-web</artifactId>
         </dependency>
         <dependency>
             <groupId>org.postgresql</groupId>
             <artifactId>postgresql</artifactId>
         </dependency>
         <dependency>
             <groupId>org.mybatis.spring.boot</groupId>
             <artifactId>mybatis-spring-boot-starter</artifactId>
             <version>1.3.1</version>
         </dependency>
         <!-- https://mvnrepository.com/artifact/com.github.pagehelper/pagehelper-spring-boot-starter -->
         <dependency>
             <groupId>com.github.pagehelper</groupId>
             <artifactId>pagehelper-spring-boot-starter</artifactId>
             <version>1.2.3</version>
         </dependency>
         <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-data-redis</artifactId>
         </dependency>
         <!-- https://mvnrepository.com/artifact/org.springframework.session/spring-session-data-redis -->
         <dependency>
             <groupId>org.springframework.session</groupId>
             <artifactId>spring-session-data-redis</artifactId>
         </dependency>
         <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-thymeleaf</artifactId>
         </dependency>
         <!-- https://mvnrepository.com/artifact/com.aliyun.oss/aliyun-sdk-oss -->
         <dependency>
             <groupId>com.aliyun.oss</groupId>
             <artifactId>aliyun-sdk-oss</artifactId>
             <version>3.0.0</version>
         </dependency>
         <!-- https://mvnrepository.com/artifact/commons-io/commons-io -->
         <dependency>
             <groupId>commons-io</groupId>
             <artifactId>commons-io</artifactId>
             <version>2.6</version>
         </dependency>
         <!-- https://mvnrepository.com/artifact/commons-fileupload/commons-fileupload -->
         <dependency>
             <groupId>commons-fileupload</groupId>
             <artifactId>commons-fileupload</artifactId>
             <version>1.3.3</version>
         </dependency>
         <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-mail</artifactId>
         </dependency> 

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

 </project>