SpringBoot+rest接口+swagger2生成API文檔+validator+mybatis+aop+國際化
代碼地址:JillWen_SpringBootDemo
mybatis
1. 添加依賴:
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>${mybatis.version}</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<!--這裏如果不寫版本會自動繼承spring-boot-starter-parent裏的版本號-->
<version>${mysql.version}</version>
</dependency>
2. dao層定義UserMapper.xml文件和UserMapper類
3. 使用註意:
- 使用mybatisGenerator插件(idea裏直接裝需要收費,參考:http://blog.csdn.net/luanlouis/article/details/43192131)
- 添加依賴
<plugin>
<groupId>org.mybatis.generator</groupId>
<artifactId>mybatis-generator-maven-plugin</artifactId>
<version>${mybatis-generator.version}</version>
<configuration>
<verbose>true</verbose>
<overwrite>true</overwrite>
</configuration>
</plugin>
添加一個“Run運行”選項,使用maven運行mybatis-generator-maven-plugin插件, 在 “Command line” 選項中輸入“mybatis-generator:generate -e”
- 當mapper.xml文件不是放在resource文件下時,需要加插件將其生成到target裏。 每次修改後需要install。
<plugin>
<artifactId>maven-resources-plugin</artifactId>
<version>2.5</version>
<executions>
<execution>
<id>copy-xmls</id>
<phase>process-sources</phase>
<goals>
<goal>copy-resources</goal>
</goals>
<configuration>
<outputDirectory>${basedir}/target/classes</outputDirectory>
<resources>
<resource>
<directory>${basedir}/src/main/java</directory>
<includes>
<include>**/*.xml</include>
</includes>
</resource>
</resources>
</configuration>
</execution>
</executions>
</plugin>
- [email protected](@MapperScan("com.example.demo.server.dao")) 時idea會報錯,但是可以運行,[email protected]
restful接口
1. restful接口定義
(參考:http://websystique.com/spring-boot/spring-boot-rest-api-example/):
- GET request to /users/ returns a list of users
- GET request to /users/1 returns the user with ID 1
- POST request to /users/ with a user object as JSON creates a new user
- PUT request to /users/1 with a user object as JSON updates the user with ID 1
- DELETE request to /users/1 deletes the user with ID 1
- DELETE request to /users/ deletes all the users
2. controller裏主要代碼
@Autowired
IUserService userService;
/**
* 查詢所有用戶
* @return
*/
@RequestMapping(value = "/", method = RequestMethod.GET)
public List<User> listAllUsers() {
List<User> users = userService.findAllUsers();
return users;
}
/**
* 根據id查詢用戶
* @param id
* @return
*/
@RequestMapping(value = "/{id}", method = RequestMethod.GET)
public User getUser(@PathVariable("id") int id) {
logger.info("Fetching User with id {}", id);
User user = userService.findById(id);
if (user == null) {
logger.error("User with id {} not found.", id);
}
return user;
}
/**
* 新建一個用戶
* @param user
* @return
*/
@RequestMapping(value = "/", method = RequestMethod.POST)
public String createUser(@ModelAttribute User user) {
[email protected],[email protected]/RequestBody ?
logger.info("Creating User : {}", user);
User exitUser = new User();
exitUser.setId(user.getId());
if (userService.isUserExist(exitUser)) {
logger.error("Unable to create. A User with id {} already exist", exitUser.getId());
}
userService.saveUser(user);
return "success";
}
/**
* 根據id更新用戶信息
* @param id
* @param user
* @return
*/
@RequestMapping(value = "/{id}", method = RequestMethod.PUT)
public String updateUser(@PathVariable("id") int id, @ModelAttribute User user) {
//RequestBody
logger.info("Updating User with id {}", id);
User currentUser = userService.findById(id);
if (currentUser == null) {
logger.error("Unable to update. User with id {} not found.", id);
return "fail";
}
currentUser.setName(user.getName());
currentUser.setAge(user.getAge());
userService.updateUser(currentUser);
return "success";
}
/**
* 根據id刪除用戶
* @param id
* @return
*/
@RequestMapping(value = "/{id}", method = RequestMethod.DELETE)
public String deleteUser(@PathVariable("id") int id) {
logger.info("Fetching & Deleting User with id {}", id);
User user = userService.findById(id);
if (user == null) {
logger.error("Unable to delete. User with id {} not found.", id);
return "fail";
}
userService.deleteUserById(id);
return "success";
}
/**
* 刪除所有用戶
* @return
*/
@RequestMapping(value = "/", method = RequestMethod.DELETE)
public String deleteAllUsers() {
logger.info("Deleting All Users");
userService.deleteAllUsers();
return "success";
}
測試(使用postman):
查詢所有用戶
查詢id為1的用戶
創建一個用戶
更新id為1的用戶
3.使用swagger2生成api文檔
(參考http://blog.didispace.com/springbootswagger2/)
- 引入依賴
<dependency>
<groupId>io.springfox</groupId>
<artifactId>springfox-swagger2</artifactId>
<version>2.2.2</version>
</dependency>
<dependency>
<groupId>io.springfox</groupId>
<artifactId>springfox-swagger-ui</artifactId>
<version>2.2.2</version>
</dependency>
- 創建Swagger2配置類
@Configuration
@EnableSwagger2
public class Swagger2 {
@Bean
public Docket createRestApi() {
return new Docket(DocumentationType.SWAGGER_2)
.apiInfo(apiInfo())
.select()
.apis(RequestHandlerSelectors.basePackage("com.example.demo.server.controller"))
.paths(PathSelectors.any())
.build();
}
private ApiInfo apiInfo() {
return new ApiInfoBuilder()
.title("Spring Boot中使用Swagger2構建RESTful APIs")
.description("使用Swagger2構建RESTful APIs")
.termsOfServiceUrl("http://www.wjcoding.cn/")
.contact("Jill")
.version("1.0")
.build();
}
}
- controller裏使用:
@ApiOperation(value="創建用戶", notes="根據User對象創建用戶")
@ApiImplicitParam(name = "user", value = "用戶詳細實體user", required = true, dataType = "User")
@RequestMapping(value = "/", method = RequestMethod.POST)
public String createUser(@ModelAttribute User user) {
//代碼略
}
- 查看api文檔: 啟動Spring Boot程序,訪問:http://localhost:8080/swagger-ui.html
國際化
(參考博客:http://412887952-qq-com.iteye.com/blog/2312274)
1. 頁面中使用國際化
創建messages.properties(messages_zh_CN.properties,messages_en_US.properties)文件 thymeleaf裏使用#{key}顯示,例如:<p th:text="#{welcome}"></p>
2. 國際化文件相關配置
#指定message的basename,多個以逗號分隔,如果不加包名的話,默認從classpath路徑開始,默認: messages spring.messages.basename=i18n/messages #設定加載的資源文件緩存失效時間,-1的話為永不過期,默認為-1 spring.messages.cache-seconds=3600 #設定Message bundles的編碼,默認: UTF-8 #spring.messages.encoding=UTF-8
驗證:火狐地址欄裏輸入about:config回車,搜索accept_languages,改成en_US,en
3. 代碼中使用國際化
- 創建messages.properties(messages_zh_CN.properties,messages_en_US.properties)文件
- 代碼裏先獲取區域,再國際化信息:
Locale locale = LocaleContextHolder.getLocale();
(或者Locale locale = RequestContextUtils.getLocale(request);)
String msg = messageSource.getMessage("welcome", null,locale);
-
區域解析器 默認:AcceptHeaderLocaleResolver 根據HTTP請求的頭部信息accept-language來解析區域
-
會話區域解析器:SessionLocaleResolver
@Bean
public LocaleResolver localeResolver() {
SessionLocaleResolver slr = new SessionLocaleResolver();
//設置默認區域
slr.setDefaultLocale(Locale.CHINA);
return slr;
}
request.getSession().setAttribute(SessionLocaleResolver.LOCALE_SESSION_ATTRIBUTE_NAME, new Locale("en", "US"))
- Cookie區域解析器:CookieLocaleResolver
@Bean
public LocaleResolver localeResolver() {
CookieLocaleResolver slr = new CookieLocaleResolver();
//設置默認區域
slr.setDefaultLocale(Locale.CHINA);
slr.setCookieMaxAge(3600);//設置cookie有效期.
returnslr;
}
- 固定的區域解析器:FixedLocaleResolver
@Bean
public LocaleResolver localeResolver() {
FixedLocaleResolver slr = new FixedLocaleResolver ();
//設置默認區域
slr.setDefaultLocale(Locale.US);
returnslr;
}
- 使用參數修改用戶的區域 將LocaleChangeInterceptor攔截器應用到處理程序映射中,它會發現當前HTTP請求中出現的特殊參數。 其中的參數名稱可以通過攔截器的paramName屬性進行自定義。 如果這種參數出現在當前請求中,攔截器就會根據參數值來改變用戶的區域。
@Bean
public LocaleChangeInterceptor localeChangeInterceptor() {
LocaleChangeInterceptor lci = new LocaleChangeInterceptor();
// 設置請求地址的參數,默認為:locale
// lci.setParamName(LocaleChangeInterceptor.DEFAULT_PARAM_NAME);
return lci;
}
@Override
public void addInterceptors(InterceptorRegistry registry) {
registry.addInterceptor(localeChangeInterceptor());
}
註意這個是可以和會話區域解析器以及Cookie區域解析器一起使用的, 但是不能和FixedLocaleResolver一起使用,否則會拋出異常信息。
驗證:
aop
(參考:http://blog.didispace.com/springbootaoplog/)
1. 添加依賴
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-aop</artifactId>
</dependency>
2. 使用:
實現AOP的切面主要有以下幾個要素:
- [email protected]
- @Order(i)註解來標識切面的優先級。i的值越小,優先級越高。
- 在切入點前的操作,按order的值由小到大執行
- 在切入點後的操作,按order的值由大到小執行
- [email protected],可以是一個規則表達式,比如下例中某個package下的所有函數,也可以是一個註解等。 根據需要在切入點不同位置的切入內容
- [email protected]
- [email protected]
- [email protected](可以用來對處理返回值做一些加工處理)
- [email protected],並自己控制何時執行切入點自身的內容
- [email protected]之後的處理邏輯
@Aspect
@Component
@Order(1)
public class WebLogAspect {
private Logger logger = Logger.getLogger(WebLogAspect.class);
ThreadLocal<Long> startTime = new ThreadLocal<>();
@Pointcut("execution(public * com.example.demo.server.controller..*.*(..))")
public void webLog(){}
@Before("webLog()")
public void doBefore(JoinPoint joinPoint) throws Throwable {
startTime.set(System.currentTimeMillis());
// 接收到請求,記錄請求內容
ServletRequestAttributes attributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
HttpServletRequest request = attributes.getRequest();
// 記錄下請求內容
logger.info("URL : " + request.getRequestURL().toString());
logger.info("HTTP_METHOD : " + request.getMethod());
logger.info("IP : " + request.getRemoteAddr());
logger.info("CLASS_METHOD : " + joinPoint.getSignature().getDeclaringTypeName() + "." + joinPoint.getSignature().getName());
logger.info("ARGS : " + Arrays.toString(joinPoint.getArgs()));
}
@AfterReturning(returning = "ret",pointcut = "webLog()")
public void doAfterReturning(Object ret) throws Throwable {
// 處理完請求,返回內容
logger.info("RESPONSE : " + ret);
logger.info("RESPONSE : " + ret);
logger.info("SPEND TIME : " + (System.currentTimeMillis() - startTime.get()));
}
}
validator
(參考http://www.jianshu.com/p/a9b1e2f7a749)
1. 添加限制
[email protected],因為id類型為int
private int id;
//使用groups屬性來給分組命名,然後在需要的地方指定命令即可
@NotBlank(groups=NAME.class)
private String name;
@Min(1)
private Integer age;
2. 使用驗證
@RestController
public class ValidateController {
@RequestMapping(value="testUser")
public void testStudent(@Validated User user) {
}
@RequestMapping(value="testUser1")
public void testStudent1(@Validated(User.NAME.class) User user) {
}
}
使用 @ScriptAssert 註解校驗復雜的業務邏輯: 如果需要校驗的業務邏輯比較復雜,[email protected], 通過方法來進行復雜業務邏輯的校驗,然後返回 true或false來表明是否校驗成功。
@ScriptAssert(lang="javascript",script="com.learn.validate.domain
.Student.checkParams(_this.name,_this.age,_this.classes)",
groups=CHECK.class)
public class Student {
//其他代碼
/註意進行校驗的方法要寫成靜態方法,否則會出現
//TypeError: xxx is not a function 的錯誤
public static boolean checkParams(String name,int age,String classes) {
if(name!=null&&age>8&classes!=null)
{
return true;
}
else
{
return false;
}
}
}
3. 註意:
在Hibernate Validator(org.hibernate.validator.constraints)中:
@NotEmpty://CharSequence, Collection, Map 和 Array 對象不能是 null 並且相關對象的 size 大於 0。 @NotBlank://String 不是 null 且去除兩端空白字符後的長度(trimmed length)大於 0。
驗證:
SpringBoot+rest接口+swagger2生成API文檔+validator+mybatis+aop+國際化