springboot項目的創建

springboot創建

1.controller
@RestController
public class BaseController {

    @RequestMapping(value = "/health_check")
    public String healthCheck() {
        return "everything is ok";
    }
 } 

2.enum 
public enum ApplyIsApprovalStateEnum {
    NO(0,"no"),
    YES(3,"yes");


    ApplyIsApprovalStateEnum(Integer code, String name){
        this.code = code;
        this.name = name;
    }
    public Integer getCode(){
        return this.code;
    }

    private Integer code;
    private String name;

} 

3.Application.java

@SpringBootApplication(exclude = {DataSourceAutoConfiguration.class})
@MapperScan("com.sun.metadata.mapper")
@EnableTransactionManagement
@EnableScheduling
@EnableAsync
public class MetadataApplication {

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

}

4.application.yml

spring:
  profiles:
    active: @profiles.active@
#    active: qa
#log:
#  dir: /opt/logs/self_access

mybatis-plus:
  configuration:
    log-impl: org.apache.ibatis.logging.stdout.StdOutImpl

5.application-dev.yml

server:
  port: 8080
  thymeleaf:
    template-loader-path: classpath:/templates
    charset: UTF-8
    cache: false
    suffix: .html
    servlet:
      content-type: text/html
  aop:
    auto: true

spring:
  datasource:
    url: jdbc:mysql://100.100.1:3308/data?useUnicode=true&characterEncoding=utf8&zeroDateTimeBehavior=convertToNull&useSSL=false&serverTimezone=GMT%2B8
    username: root
    password: D
    driver-class-name: com.mysql.cj.jdbc.Driver
    type: com.alibaba.druid.pool.DruidDataSource
  redis:
    host : 100.100.1
    port : 600
    password :
    timeout : 3000


mybatis:
  type-aliaases-pocket: com.sun.metadata.entity
  mapper-locations: classpath:mapper/*.xml
  configuration:
    map-underscore-to-camel-case: true

6.pom.xml


    <build>

        <finalName>metadata</finalName>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
            <plugin>
                <groupId>org.mybatis.generator</groupId>
                <artifactId>mybatis-generator-maven-plugin</artifactId>
                <version>1.3.7</version>
                <dependencies>
                    <dependency>
                        <groupId>mysql</groupId>
                        <artifactId>mysql-connector-java</artifactId>
                        <version>${mysql.version}</version>
                    </dependency>
                </dependencies>
            </plugin>
        </plugins>

        <!--重要 如果不設置resource 會導致application.yaml中的@@找不到pom文件中的配置-->
        <resources>
            <resource>
                <directory>src/main/resources</directory>
                <filtering>true</filtering>
            </resource>
        </resources>
        <!--重要 如果不設置resource 會導致application.yaml中的@@找不到pom文件中的配置-->

    </build>

<!-- 選取不同的配置文件，dev或者pro -->
    <profiles>
        <profile>
            <id>prod</id>
            <properties>
                <profiles.active>prod</profiles.active>
            </properties>
        </profile>
        <profile>
            <id>dev</id>
            <activation>
                <activeByDefault>true</activeByDefault>
            </activation>
            <properties>
                <profiles.active>dev</profiles.active>
            </properties>
        </profile>
    </profiles>

7.logback.xml

<?xml version="1.0" encoding="UTF-8"?>
<configuration>
    <appender name="console" class="ch.qos.logback.core.ConsoleAppender">
        <encoder>
            <pattern>%d{yyyy-MM-dd HH:mm:ss} %contextName [%thread] %-5level %logger{36} - %L%msg%n</pattern>
            <charset>UTF-8</charset>
        </encoder>
    </appender>

    //正常運行日誌
    <logger name="com.soul.metadata" additivity="true" level="DEBUG">
        <appender-ref ref="console"/>
    </logger>
</configuration>

8.工具類
8.1 從session中獲得信息
   public static String getNickName(HttpServletRequest request){
        UserEntity user = (UserEntity) request.getSession().getAttribute("session_user");
        if(null != user && StringUtils.isNotBlank(user.getName())){
            return user.getName();
        }
        return "";
    }
8.2 從cookie中獲得信息
 public static String getUserId(HttpServletRequest request) {
        String userId = "";
        if (request.getCookies() != null) {
            for (Cookie cookie : request.getCookies()) {
                log.info("cookie"+cookie.getName()+":value"+cookie.getValue());
                if (cookie.getName().equalsIgnoreCase("userId")) {
                    userId = cookie.getValue();
                }
            }
        }

        return userId;
    }

8.3 解決跨域問題
 
@Configuration
public class GlobalCorsConfig {
    @Bean
    public WebMvcConfigurer corsConfigurer() {
        return new WebMvcConfigurer() {
            @Override
            //重寫父類提供的跨域請求處理的接口
            public void addCorsMappings(CorsRegistry registry) {
                //添加映射路徑
                registry.addMapping("/**")
                        //放行哪些原始域
                        .allowedOrigins("*")
                        //是否發送Cookie信息
                        .allowCredentials(true)
                        //放行哪些原始域(請求方式)
                        .allowedMethods("GET", "POST", "PUT", "DELETE")
                        //放行哪些原始域(頭部信息)
                        .allowedHeaders("*")
                        //暴露哪些頭部信息（因爲跨域訪問默認不能獲取全部頭部信息）
                        .exposedHeaders("Header1", "Header2");
            }
        };


    }
}

8.4 攔截器處理

@Component
public class WebInterceptor implements HandlerInterceptor {

    /**
     * 預處理回調方法，實現處理器的預處理
     * 返回值：true表示繼續流程；false表示流程中斷，不會繼續調用其他的攔截器或處理器
     */
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler)
            throws Exception {
        System.out.println("開始攔截.........");
        response.setHeader("Access-Control-Allow-Origin", request.getHeader("Origin"));
        response.setHeader("Access-Control-Allow-Headers", "Origin, X-Atmosphere-tracking-id, X-Atmosphere-Framework, X-Cache-Date, Content-Type, X-Atmosphere-Transport,Sign-Auth,set-cookie,soul-request-type");
        response.setHeader("Access-Control-Allow-Credentials", "true");
        response.setContentType("text/html;charset=UTF-8");
        String userId = "";
        if (request.getMethod().equals("GET") || request.getMethod().equals("POST")) {
            if (request.getCookies() != null) {
                for (Cookie cookie : request.getCookies()) {
                    if (cookie.getName().equalsIgnoreCase("userId")) {
                        userId = cookie.getValue();
                    }
                }
            }
        } else
        if (request.getMethod().equals("OPTIONS")) {
            response.setStatus(200);
            return true;
        }

        StringBuffer requestURL = request.getRequestURL();

        if (requestURL.toString().contains("health_check")) {
            return true;
        } else if (userId.equals("")) {
            response.setStatus(200);
            JSONObject resoutJson = new JSONObject();
            resoutJson.put("success", false);
            resoutJson.put("code", 20001);
            OutputStream out = response.getOutputStream();
            out.write(resoutJson.toJSONString().getBytes());
            return false;
        } else {

            return true;
        }

    }
}

8.5 http的url連接

    public static String post(String url, String json) throws IOException {
        MediaType JSON = MediaType.parse("application/json; charset=utf-8");

        OkHttpClient client = new OkHttpClient();
        RequestBody body = RequestBody.create(json, JSON); // new
        Request request = new Request.Builder()
                .url(url)
                .post(body)
                .build();
        Response response = client.newCall(request).execute();
        return response.body().string();
    }

8.6 JSON處理

jsonObject  轉字符串  jsonObject.toJSONString()
			轉對象	RoleModel param = jsonObject.getObject("param",RoleModel.class);
			轉數組	 JSONArray jsonArray = jsonObject.getJSONArray("requestParam");