二 创建springCloud_server项目注册到eureka服务中

1,创建springCloud_server项目

2,导入依赖

<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.shawemou.spring</groupId>
    <artifactId>springboot</artifactId>
    <version>1.0.0-SNAPSHOT</version>
    <packaging>war</packaging>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.5.4.RELEASE</version>
    </parent>

    <!-- 导入Spring Cloud的依赖管理 -->
    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>Dalston.SR3</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>


    <dependencies>
        <!--数据校验,自己做的form表单后台校验 -->
        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-validator</artifactId>
        </dependency>
        <!-- 提供前端 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <!-- restTemplate封装的okhttp -->
        <dependency>
            <groupId>com.squareup.okhttp3</groupId>
            <artifactId>okhttp</artifactId>
        </dependency>

        <!-- 注册到eureka服务需要这个依赖,除了eureka本身服务,排除jackson-dataformat-xml的jar包,因为远程调用
        这个jar包会吧json转为xml -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-eureka-server</artifactId>
            <exclusions>
                <exclusion>
                    <groupId>com.fasterxml.jackson.dataformat</groupId>
                    <artifactId>jackson-dataformat-xml</artifactId>
                </exclusion>
            </exclusions>
        </dependency>

        <!-- jsp标签库 -->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>jstl</artifactId>
        </dependency>

        <!-- 添加 tomcat的支持,当时为解析jsp用到的依赖-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-tomcat</artifactId>
            <scope>provided</scope>
        </dependency>

        <!-- 可以解析jsp,里面有跳转页面,所以配置  -->
        <dependency>
            <groupId>org.apache.tomcat.embed</groupId>
            <artifactId>tomcat-embed-jasper</artifactId>
            <scope>provided</scope>
        </dependency>

        <!-- servlet 依赖 -->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <scope>provided</scope>
        </dependency>
    </dependencies>

    <build>
        <finalName>${project.artifactId}</finalName>
        <plugins>
            <!-- 资源文件拷贝插件 -->
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-resources-plugin</artifactId>
                <configuration>
                    <encoding>UTF-8</encoding>
                </configuration>
            </plugin>
            <!-- java编译插件 -->
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                    <encoding>UTF-8</encoding>
                </configuration>
            </plugin>
        </plugins>
    </build>

</project>

3,编写application.yml文件
这里需要注意的是,在springboot中如果有跳转到jsp页面的话,springboot要改为web项目,并且jsp只能放在WEB-INF内部

server:
  port: 8083

spring: 
  application:  
    name: springcloud_orderServer #指定自己提供服务的名字,用于client调用
                                    #这是一个错误示例,服务名字不能还有下划线_
  mvc:
    view:
      prefix: /WEB-INF/  # 配置视图文件所在位置；  
      suffix: .jsp  # 配置视图文件后缀名；  


eureka:
  client:
    registerWithEureka: true #是否将自己注册到Eureka服务中，默认为true
    fetchRegistry: true #是否从Eureka中获取注册信息，默认为true
    serviceUrl: #Eureka客户端与Eureka服务端进行交互的地址
      defaultZone: http://shawemou:[email protected]:6868/eureka/ #因为eureka使用了安全校验,所以要加用户和密码
  instance: 
    prefer-ip-address: true #将自己的ip地址注册到Eureka服务中

4,编写入口ServerSpringApplication

@EnableEurekaClient
@SpringBootApplication
public class ServerSpringApplication {
    public static void main(String[] args) {
        SpringApplication.run(ServerSpringApplication.class, args);
    }

    @Bean
    public RestTemplate getRestTemplate() {
        return new RestTemplate(new OkHttp3ClientHttpRequestFactory());
    }

}

5,这里提一下,里面用到了后台表单校验

User类

public class User {
    @NotNull(message="名字不能为null")
    private String name;
    @NotNull(message="年龄不能为null")
    private Integer age;

    @Valid
    @NotNull
    private Cat cat;

Cat类

public class Cat {
    @NotNull(message = "猫的名字 不能为null")
    private String name;

    @NotNull(message = "猫的年龄不能为null")
    private Integer age;

Controller

    @GetMapping("insert2")
    public String insert(@Valid User user,BindingResult result,String i,HttpServletRequest request){
        System.out.println(user);
        ModelAndView mv = new ModelAndView("NewFile");
        if(result.hasErrors()){
            // 收集错误信息
            List<String> msgs = new ArrayList<>();
            for (ObjectError error : result.getAllErrors()) {
                System.out.println(error.getDefaultMessage());
                msgs.add(error.getDefaultMessage());
            }
            mv.addObject("msgs",msgs);
            request.setAttribute("msgs", msgs);
            // 参数有错，响应400
            return "NewFile";
        }
        return "NewFile";
    }

这样就将服务注册到eureka中了