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 {
@Bean
public IpCountService ipCountService(){
return new IpCountService();
}
}
org.springframework.boot.autoconfigure.EnableAutoConfiguration=\
cn.itcast.autoconfig.IpAutoCinfigur
@Autowired
private 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 {
@Bean
public 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 {
@Bean
public IpCountService ipCountService(){
return new IpCountService();
}
}
@Autowired
private 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 {
@Autowired
private IpCountService ipCountService;
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
ipCountService.count();
return true;
}
}
@Configuration
public class SpringMvcConfig implements WebMvcConfigurer {
@Bean
public IpCountInterceptor ipCountInterceptor(){
return new IpCountInterceptor();
}
@Override
public 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 {
@Bean
public 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。
