【Spring】构建Springboot项目 实现restful风格接口
项目代码如下:
- package hello;
- import org.springframework.boot.SpringApplication;
- import org.springframework.boot.autoconfigure.SpringBootApplication;
- @SpringBootApplication // same as @Configuration @EnableAutoConfiguration @ComponentScan
- public class Application {
- public static void main(String[] args) {
- SpringApplication.run(Application.class, args);
- }
- }
- package hello;
- public class Greeting {
- private long id;
- private String content;
- public Greeting(long id, String content) {
- super();
- this.id = id;
- this.content = content;
- }
- public long getId() {
- return id;
- }
- public void setId(long id) {
- this.id = id;
- }
- public String getContent() {
- return content;
- }
- public void setContent(String content) {
- this.content = content;
- }
- }
- package hello;
- import java.util.concurrent.atomic.AtomicLong;
- import org.springframework.web.bind.annotation.RequestMapping;
- import org.springframework.web.bind.annotation.RequestParam;
- import org.springframework.web.bind.annotation.RestController;
- @RestController // shorthand for @Controller and @ResponseBody rolled together
- public class GreetingController {
- private static final String template="Hello,%s!";
- private final AtomicLong counter=new AtomicLong();
- @RequestMapping("/greeting")
- public Greeting greeting(@RequestParam(value="name",defaultValue="World")String name){
- System.out.println("-------------------------");
- return new Greeting(counter.incrementAndGet(),String.format(template, name));
- }
- }
- <?xml version="1.0" encoding="UTF-8"?>
- <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.slp</groupId>
- <artifactId>restSpringDemo1</artifactId>
- <version>0.1.0</version>
- <parent>
- <groupId>org.springframework.boot</groupId>
- <artifactId>spring-boot-starter-parent</artifactId>
- <version>1.4.1.RELEASE</version>
- </parent>
- <dependencies>
- <dependency>
- <groupId>org.springframework.boot</groupId>
- <artifactId>spring-boot-starter-web</artifactId>
- </dependency>
- <dependency>
- <groupId>org.springframework.boot</groupId>
- <artifactId>spring-boot-starter-test</artifactId>
- <scope>test</scope>
- </dependency>
- <dependency>
- <groupId>com.jayway.jsonpath</groupId>
- <artifactId>json-path</artifactId>
- <scope>test</scope>
- </dependency>
- </dependencies>
- <properties>
- <java.version>1.8</java.version>
- </properties>
- <build>
- <plugins>
- <plugin>
- <groupId>org.springframework.boot</groupId>
- <artifactId>spring-boot-maven-plugin</artifactId>
- </plugin>
- </plugins>
- </build>
- <repositories>
- <repository>
- <id>spring-releases</id>
- <url>https://repo.spring.io/libs-release</url>
- </repository>
- </repositories>
- <pluginRepositories>
- <pluginRepository>
- <id>spring-releases</id>
- <url>https://repo.spring.io/libs-release</url>
- </pluginRepository>
- </pluginRepositories>
- </project>
在Application.java中run as java application 出现:
- . ____ _ __ _ _
- /\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
- ( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
- \\/ ___)| |_)| | | | | || (_| | ) ) ) )
- ' |____| .__|_| |_|_| |_\__, | / / / /
- =========|_|==============|___/=/_/_/_/
- :: Spring Boot :: (v1.4.1.RELEASE)
- 2016-10-13 11:19:16.510 INFO 9864 --- [ main] hello.Application : Starting Application on QH-20160418YQMB with PID 9864 (started by sanglp in D:\rest风格的apring项目\restSpringDemo1)
- 2016-10-13 11:19:16.525 INFO 9864 --- [ main] hello.Application : No active profile set, falling back to default profiles: default
- 2016-10-13 11:19:16.713 INFO 9864 --- [ main] ationConfigEmbeddedWebApplicationContext : Refreshing org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@72f926e6: startup date [Thu Oct 13 11:19:16 CST 2016]; root of context hierarchy
- 2016-10-13 11:19:19.691 INFO 9864 --- [ main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat initialized with port(s): 8080 (http)
- 2016-10-13 11:19:19.710 INFO 9864 --- [ main] o.apache.catalina.core.StandardService : Starting service Tomcat
- 2016-10-13 11:19:19.710 INFO 9864 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet Engine: Apache Tomcat/8.0.35
- 2016-10-13 11:19:20.148 INFO 9864 --- [ost-startStop-1] org.apache.jasper.servlet.TldScanner : At least one JAR was scanned for TLDs yet contained no TLDs. Enable debug logging for this logger for a complete list of JARs that were scanned but no TLDs were found in them. Skipping unneeded JARs during scanning can improve startup time and JSP compilation time.
- 2016-10-13 11:19:20.148 INFO 9864 --- [ost-startStop-1] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
- 2016-10-13 11:19:20.148 INFO 9864 --- [ost-startStop-1] o.s.web.context.ContextLoader : Root WebApplicationContext: initialization completed in 3451 ms
- 2016-10-13 11:19:20.382 INFO 9864 --- [ost-startStop-1] o.s.b.w.servlet.ServletRegistrationBean : Mapping servlet: 'dispatcherServlet' to [/]
- 2016-10-13 11:19:20.398 INFO 9864 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'characterEncodingFilter' to: [/*]
- 2016-10-13 11:19:20.398 INFO 9864 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'hiddenHttpMethodFilter' to: [/*]
- 2016-10-13 11:19:20.398 INFO 9864 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'httpPutFormContentFilter' to: [/*]
- 2016-10-13 11:19:20.398 INFO 9864 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'requestContextFilter' to: [/*]
- 2016-10-13 11:19:20.866 INFO 9864 --- [ main] s.w.s.m.m.a.RequestMappingHandlerAdapter : Looking for @ControllerAdvice: org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@72f926e6: startup date [Thu Oct 13 11:19:16 CST 2016]; root of context hierarchy
- 2016-10-13 11:19:20.986 INFO 9864 --- [ main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/greeting]}" onto public hello.Greeting hello.GreetingController.greeting(java.lang.String)
- 2016-10-13 11:19:20.986 INFO 9864 --- [ main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/error]}" onto public org.springframework.http.ResponseEntity<java.util.Map<java.lang.String, java.lang.Object>> org.springframework.boot.autoconfigure.web.BasicErrorController.error(javax.servlet.http.HttpServletRequest)
- 2016-10-13 11:19:20.986 INFO 9864 --- [ main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/error],produces=[text/html]}" onto public org.springframework.web.servlet.ModelAndView org.springframework.boot.autoconfigure.web.BasicErrorController.errorHtml(javax.servlet.http.HttpServletRequest,javax.servlet.http.HttpServletResponse)
- 2016-10-13 11:19:21.033 INFO 9864 --- [ main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/webjars/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
- 2016-10-13 11:19:21.033 INFO 9864 --- [ main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
- 2016-10-13 11:19:21.095 INFO 9864 --- [ main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/**/favicon.ico] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
- 2016-10-13 11:19:21.307 INFO 9864 --- [ main] o.s.j.e.a.AnnotationMBeanExporter : Registering beans for JMX exposure on startup
- 2016-10-13 11:19:21.463 INFO 9864 --- [ main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat started on port(s): 8080 (http)
- 2016-10-13 11:19:21.479 INFO 9864 --- [ main] hello.Application : Started Application in 6.497 seconds (JVM running for 7.83)
- 2016-10-13 11:21:46.570 INFO 9864 --- [nio-8080-exec-1] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring FrameworkServlet 'dispatcherServlet'
- 2016-10-13 11:21:46.570 INFO 9864 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet : FrameworkServlet 'dispatcherServlet': initialization started
- 2016-10-13 11:21:46.622 INFO 9864 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet : FrameworkServlet 'dispatcherServlet': initialization completed in 51 ms
表示启动成功,这是就可以访问了 http://localhost:8080/greeting?name=xxb
会出现如下结果:
- {"id":3,"content":"Hello,xuxiaobo!"}
这是一个纯java的项目,不需要启动tomcat也可以执行访问
首先你需要建立一个基本的项目,你可以使用任何你喜欢的方式去构造Spring项目,这里使用的是Maven.如果你不熟悉Maven的话请移步 Building Java Projects with Maven.
创建项目目录结构
在你所选的项目目录中,创建如下的子目录结构;例如在unix系统中使用mkdir -p src/main/java/hello。
- └── src
- └── main
- └── java
- └── hello
pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<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>org.springframework</groupId>
<artifactId>gs-rest-service</artifactId>
<version>0.1.0</version>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.4.1.RELEASE</version>
</parent>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>com.jayway.jsonpath</groupId>
<artifactId>json-path</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<properties>
<java.version>1.8</java.version>
</properties>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
<repositories>
<repository>
<id>spring-releases</id>
<url>https://repo.spring.io/libs-release</url>
</repository>
</repositories>
<pluginRepositories>
<pluginRepository>
<id>spring-releases</id>
<url>https://repo.spring.io/libs-release</url>
</pluginRepository>
</pluginRepositories>
</project>
Spring Boot的maven插件提供了很多便利的特性:
- 它包含了路径中的所有jar文件,使用“über-jar”。它使得执行和转换服务非常便利。
它查询
public static void main()
方法去标志为一个可执行的类- 它提供了一个内置的匹配Spring boot 依赖的版本,你可以选择任何你希望的版本,但是默认情况下它会选择Boot的版本设置变量。
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