水完上次那个webService，总感觉不太对，是不是也太麻烦了。。。。
然后找了下，可以直接访问到 controller。。。。
1，Controller 上线
依然是从Application开始
package dc.test.spring.boot2.sun;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
/**
* 入口3，实现 直接访问controller
*
* @author senrsl
* @ClassName: TestSunApplication
* @Package: dc.test.spring.boot2.sun
* @CreateTime: 2020/10/12 3:25 下午
*/
@SpringBootApplication
public class TestSunApplication {
public static void main(String[] args) {
SpringApplication.run(TestSunApplication.class, args);
}
}
然后，直接加个controller。。。。
package dc.test.spring.boot2.sun.controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
/**
* http://localhost:8080/sun
*
* @author senrsl
* @ClassName: Test01Controller
* @Package: dc.test.spring.boot2.controller
* @CreateTime: 2020/9/27 4:30 下午
*/
@RestController
public class TestSun01Controller {
@RequestMapping("sun")
public String sun() {
return getClass().getSimpleName() + " from Sun";
}
}
这时候，直接运行，竟然可以直接访问了。。。。
也不需要 注解去Scan啥的。。。。
结构如下：
SENRSL:boot2 senrsl$ tree sun/
sun/
├── TestSunApplication.java
└── controller
└── TestSun01Controller.java
1 directory, 2 files
SENRSL:boot2 senrsl$
然后，get 跟post 都可以访问。。。。
SENRSL:Downloads senrsl$ curl -d 'name=bbbb&age=16' -X POST http://localhost:8080/sun
TestSun01Controller from Sun
SENRSL:Downloads senrsl$
SENRSL:Downloads senrsl$ curl 'http://localhost:8080/sun'
TestSun01Controller from Sun
SENRSL:Downloads senrsl$
这个简单了好多啊。。。。
2，@RestController默认返回 json结构
如果Controller类注解为 @RestController，会把返回的类默认返回为json字符串
结构如下
SENRSL:boot2 senrsl$ tree lee/
lee/
├── TestLeeApplication.java
├── controller
│ └── TestLeeController.java
└── domain
└── LeeBean.java
2 directories, 3 files
SENRSL:boot2 senrsl$
主入口无变化，domain如下
package dc.test.spring.boot2.lee.domain;
/**
* @author senrsl
* @ClassName: LeeBean
* @Package: dc.test.spring.boot2.lee.domain
* @CreateTime: 2020/10/12 3:51 下午
*/
public class LeeBean {
private long id;
private String name;
private int age;
public LeeBean() {
}
public LeeBean(long id, String name, int age) {
this.id = id;
this.name = name;
this.age = age;
}
public long getId() {
return id;
}
public String getName() {
return name;
}
public int getAge() {
return age;
}
}
然后 Controller如下：
package dc.test.spring.boot2.lee.controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import dc.test.spring.boot2.lee.domain.LeeBean;
/**
* @author senrsl
* @ClassName: TestLeeController
* @Package: dc.test.spring.boot2.lee.controller
* @CreateTime: 2020/10/12 3:51 下午
*/
@RestController
public class TestLeeController {
@RequestMapping("getLeeBean")
public LeeBean getLeeBean() {
return new LeeBean(1L, "李啊", 100);
}
}
domain需要写getter，不然会报
Resolved [org.springframework.http.converter.HttpMessageNotWritableException: No converter found for return value of type: class dc.test.spring.boot2.lee.domain.LeeBean]
运行效果：
SENRSL:Downloads senrsl$ curl http://localhost:8080/getLeeBean
{"id":1,"name":"李啊","age":100}
SENRSL:Downloads senrsl$ curl -X POST http://localhost:8080/getLeeBean
{"id":1,"name":"李啊","age":100}SENRSL:Downloads senrsl$
看起来这个玩法，是现在更新语言的标配呢。。。。
3，增加filter
都是些老概念，老玩法，新工具。。。。
以前注册filter是在web.xml里逐个增加配置，使用Spring boot 可以通过xxxFilter注解、FilterRegistrationBean自定义注册等方式；
文件结构如下：
SENRSL:boot2 senrsl$ tree zhou/
zhou/
├── TestZhouApplication.java
├── configuration
│ └── TestZhouConfiguration.java
├── controller
│ └── TestZhouController.java
└── filter
└── TestZhou01Filter.java
3 directories, 4 files
SENRSL:boot2 senrsl$
增加了TestZhouConfiguration文件和filter目录。
其中 TestZhou01Filter如下：
package dc.test.spring.boot2.zhou.filter;
import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
/**
* filter来自javax.servlet包
*
* @author senrsl
* @ClassName: TestZhou01Filter
* @Package: dc.test.spring.boot2.zhou.filter
* @CreateTime: 2020/10/12 4:19 下午
*/
public class TestZhou01Filter implements Filter {
@Override
public void init(FilterConfig filterConfig) throws ServletException {
System.out.println(getClass().getSimpleName() + " init() " + filterConfig + " " + filterConfig.getFilterName() + " " + filterConfig.getInitParameter("testInit01"));
}
@Override
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
HttpServletRequest req = (HttpServletRequest) request;
System.out.println(getClass().getSimpleName() + " doFilter() " + "request = " + request + ", response = " + response + ", chain = " + chain + ",requestUrl:" + req.getRequestURI());
chain.doFilter(request, response);
}
@Override
public void destroy() {
System.out.println(getClass().getSimpleName() + " destroy()");
}
}
配置文件，TestZhouConfiguration如下：
package dc.test.spring.boot2.zhou.configuration;
import org.apache.catalina.filters.RemoteIpFilter;
import org.springframework.boot.web.servlet.FilterRegistrationBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import dc.test.spring.boot2.zhou.filter.TestZhou01Filter;
/**
* @author senrsl
* @ClassName: TestZhouConfiguration
* @Package: dc.test.spring.boot2.zhou.configuration
* @CreateTime: 2020/10/12 4:28 下午
*/
@Configuration
public class TestZhouConfiguration {
@Bean
public RemoteIpFilter testRemoteIpFilter() {
return new RemoteIpFilter();
}
@Bean
public FilterRegistrationBean testFilterRegistrationBean() {
FilterRegistrationBean bean = new FilterRegistrationBean();
bean.setFilter(new TestZhou01Filter());
//bean.addUrlPatterns("/zhou"); //过滤路径,只过滤/zhou，不过滤aaa/zhou或zhou/bbb
bean.addUrlPatterns("/zhou/*");
bean.addInitParameter("testInit01", "aaaaaaaaaaa");//这里设置，filter中filterConfig能取到
bean.setName(TestZhou01Filter.class.getSimpleName());
bean.setOrder(1); //排序
return bean;
}
}
调用url，收到filter相关日志。。。。
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v2.3.4.RELEASE)
2020-10-12 16:38:24.108 INFO 32347 --- [ main] d.t.s.boot2.zhou.TestZhouApplication : Starting TestZhouApplication on SENRSL with PID 32347 (/Users/senrsl/j2ee/Project/TestSpringBoot/spring_boot2/build/classes/java/main started by senrsl in /Users/senrsl/j2ee/Project/TestSpringBoot/spring_boot2)
2020-10-12 16:38:24.110 INFO 32347 --- [ main] d.t.s.boot2.zhou.TestZhouApplication : No active profile set, falling back to default profiles: default
2020-10-12 16:38:24.574 INFO 32347 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 8080 (http)
2020-10-12 16:38:24.580 INFO 32347 --- [ main] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2020-10-12 16:38:24.580 INFO 32347 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet engine: [Apache Tomcat/9.0.38]
2020-10-12 16:38:24.621 INFO 32347 --- [ main] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2020-10-12 16:38:24.621 INFO 32347 --- [ main] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 486 ms
TestZhou01Filter init() ApplicationFilterConfig[name=TestZhou01Filter, filterClass=dc.test.spring.boot2.zhou.filter.TestZhou01Filter] TestZhou01Filter aaaaaaaaaaa
2020-10-12 16:38:24.724 INFO 32347 --- [ main] o.s.s.concurrent.ThreadPoolTaskExecutor : Initializing ExecutorService 'applicationTaskExecutor'
2020-10-12 16:38:24.834 INFO 32347 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat started on port(s): 8080 (http) with context path ''
2020-10-12 16:38:24.841 INFO 32347 --- [ main] d.t.s.boot2.zhou.TestZhouApplication : Started TestZhouApplication in 0.932 seconds (JVM running for 1.299)
2020-10-12 16:39:38.510 INFO 32347 --- [nio-8080-exec-1] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring DispatcherServlet 'dispatcherServlet'
2020-10-12 16:39:38.511 INFO 32347 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet : Initializing Servlet 'dispatcherServlet'
2020-10-12 16:39:38.514 INFO 32347 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet : Completed initialization in 3 ms
TestZhou01Filter doFilter() request = org.apache.catalina.connector.RequestFacade@161b9acd, response = org.apache.catalina.connector.ResponseFacade@48b86f4f, chain = org.apache.catalina.core.ApplicationFilterChain@76899320,requestUrl:/zhou
TestZhou01Filter destroy()
2020-10-12 16:42:56.306 INFO 32347 --- [extShutdownHook] o.s.s.concurrent.ThreadPoolTaskExecutor : Shutting down ExecutorService 'applicationTaskExecutor'
Process finished with exit code 130 (interrupted by signal 2: SIGINT)
其中，启动时调用init，关闭时调用destroy，调用url时调用 doFilter()....
今天就水到这里，喝会茶准备下班！
senRsl
2020年10月12日15:31:46
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