自定义starter案例——统计独立IP访问次数

ip计数业务功能开发

public class IpCountService {private Map<String,Integer> ipCountMap = new HashMap<String,Integer>();@Autowired// 当前的request对象的诸如工作由当前的starter的工程提供自动装配private HttpServletRequest httpServletRequest;public void count(){// 每次调用当前操作，就记录当前访问的ip，然后累加访问次数// 1.获取当前操作的ip地址String ip = httpServletRequest.getRemoteAddr();System.out.println("----------------------------------" + ip);// 2.根据ip地址从map取值，并递增ipCountMap.put(ip,ipCountMap.get(ip)==null? 0+1 : ipCountMap.get(ip) + 1);}
}

使用@import注入bean也可以

public class IpAutoCinfiguration {@Beanpublic IpCountService ipCountService(){return new IpCountService();}
}

org.springframework.boot.autoconfigure.EnableAutoConfiguration=\
cn.itcast.autoconfig.IpAutoCinfigur

    @Autowiredprivate IpCountService ipCountService;@GetMapping("/{currentPage}/{pageSize}")public R getPage(@PathVariable int currentPage,@PathVariable int pageSize,Book book){ipCountService.count();IPage<Book> page = bookService.getPage(currentPage, pageSize,book);// 如果当前页码值大于总页码值，那么重新执行查询操作，使用最大页码值作为当前页码值if (currentPage > page.getPages()){page = bookService.getPage((int)page.getPages(), pageSize,book);}return new R(true,page);}

定时任务报表开发

@EnableScheduling
public class IpAutoCinfiguration {@Beanpublic IpCountService ipCountService(){return new IpCountService();}
}

@Scheduled(cron = "0/5 * * * * ?")public void print(){System.out.println("           ip访问监控");System.out.println("+-----ip-address-----+---+");for (Map.Entry<String, Integer> entry : ipCountMap.entrySet()) {String key = entry.getKey();Integer value = entry.getValue();System.out.println(String.format("|%18s  |%5d  |",key,value));}System.out.println("+--------------------+---+");}

使用属性配置功能设置功能参数

@ConfigurationProperties(prefix = "tools.ip")
public class IpProperties {/*** 日志的显示周期*/private Long cycle = 5L;/*** 是否周期内重置数据*/private Boolean cycleReset = false;/*** 日志的输出模式  detail:详细模式，simple：极简模式*/private String model = LogModel.DETAIL.value;public enum LogModel{DETAIL("detail"),SIMPLE("simple");private String value;LogModel(String value){this.value = value;}public String getValue(){return value;}}public Long getCycle() {return cycle;}public void setCycle(Long cycle) {this.cycle = cycle;}public Boolean getCycleReset() {return cycleReset;}public void setCycleReset(Boolean cycleReset) {this.cycleReset = cycleReset;}public String getModel() {return model;}public void setModel(String model) {this.model = model;}
}

@EnableScheduling
@EnableConfigurationProperties(IpProperties.class)
public class IpAutoCinfiguration {@Beanpublic IpCountService ipCountService(){return new IpCountService();}
}

    @Autowiredprivate IpProperties ipProperties;@Scheduled(cron = "0/5 * * * * ?")public void print(){if(ipProperties.getModel().equals(IpProperties.LogModel.DETAIL.getValue())){System.out.println("           ip访问监控");System.out.println("+-----ip-address-----+--num--+");for (Map.Entry<String, Integer> entry : ipCountMap.entrySet()) {String key = entry.getKey();Integer value = entry.getValue();System.out.println(String.format("|%18s  |%5d  |",key,value));}System.out.println("+--------------------+---+");} else if (ipProperties.getModel().equals(IpProperties.LogModel.SIMPLE.getValue())) {System.out.println("       ip访问监控");System.out.println("+-----ip-address-----+");for (String key : ipCountMap.keySet()) {System.out.println(String.format("|%18s  |",key));}System.out.println("+--------------------+");}if(ipProperties.getCycleReset()){ipCountMap.clear();}}

tools:ip:
#    cycle: 1
#    cycle-reset: true
#    model: "simple"

配置调整

自定义bean名称，原因如下：
因为我们的周期属性是要配置在cron表达式中的，但是如何获取配置的属性，需要读取到bean，但是直接找bean的话，名字特别长，而且这个bean的名字和beanName的生成器生成的名称恰巧与我们的表达式冲突，所以就曲线救国，自己给bean起个名字。
但是自己起个名字就出现了另一个问题，我们的配置类上以前是使用@EnableConfigurationProperties(IpProperties.class)注册的IpProperties的bean，现在IpProperties被注册了两次bean，又有了新的问题，所以我们在IpAutoCinfiguration上把以前的EnableConfigurationProperties的方式换成Import的方式导入bean。

自定义拦截器

public class IpCountInterceptor implements HandlerInterceptor {@Autowiredprivate IpCountService ipCountService;@Overridepublic boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {ipCountService.count();return true;}}

@Configuration
public class SpringMvcConfig implements WebMvcConfigurer {@Beanpublic IpCountInterceptor ipCountInterceptor(){return new IpCountInterceptor();}@Overridepublic void addInterceptors(InterceptorRegistry registry) {registry.addInterceptor(ipCountInterceptor()).addPathPatterns("/**");}
}

写完后要在启动类上加上拦截器哟！，使用Import加进去。

@EnableScheduling
//@EnableConfigurationProperties(IpProperties.class)
@Import({IpProperties.class, IpCountInterceptor.class, SpringMvcConfig.class})
public class IpAutoCinfiguration {@Beanpublic IpCountService ipCountService(){return new IpCountService();}
}

开启yml提示功能

<!--        <dependency>-->
<!--            <groupId>org.springframework.boot</groupId>-->
<!--            <artifactId>spring-boot-configuration-processor</artifactId>-->
<!--        </dependency>-->

用这个坐标生成spring-configuration-metadata，也就是加上这个坐标，然后clean-install,就会生成这个文件，把这个文件从target目录中找到并且提出来，放到我们的配置目录下，这个坐标就可以注释了，因为上线用不到。

  "hints": [{"name": "tools.ip.model","values": [{"value": "detail","description": "详细模式."},{"value": "simple","description": "极简模式."}]}]

提示功能默认是[]，自己照着样子配就行了。