SpringBoot 速记

@Configuration
@ConditionalOnClass(RedisOperations.class)
@EnableConfigurationProperties(RedisProperties.class)
@Import({ LettuceConnectionConfiguration.class, JedisConnectionConfiguration.class })
public class RedisAutoConfiguration {
	@Bean
	@ConditionalOnMissingBean(name = "redisTemplate")
	public RedisTemplate<Object, Object> redisTemplate(RedisConnectionFactory redisConnectionFactory)
			throws UnknownHostException {
		RedisTemplate<Object, Object> template = new RedisTemplate<>();
		template.setConnectionFactory(redisConnectionFactory);
		return template;
	}
	@Bean
	@ConditionalOnMissingBean
	public StringRedisTemplate stringRedisTemplate(RedisConnectionFactory redisConnectionFactory)
			throws UnknownHostException {
		StringRedisTemplate template = new StringRedisTemplate();
		template.setConnectionFactory(redisConnectionFactory);
		return template;
	}
}
@ConfigurationProperties(prefix = "spring.redis")
public class RedisProperties {...}

@Autowired
private RedisTemplate redisTemplate;
ValueOperations ops2 = redisTemplate.opsForValue();
Book book = (Book) ops2.get("b1");

@SpringBootConfiguration
@EnableAutoConfiguration
@ComponentScan(excludeFilters = { @Filter(type = FilterType.CUSTOM, classes = TypeExcludeFilter.class),
		@Filter(type = FilterType.CUSTOM, classes = AutoConfigurationExcludeFilter.class) })
public @interface SpringBootApplication {...}

SpringApplication.run(SpringBootLearnApplication.class, args);

@Configuration
@ConfigurationProperties(prefix = "spring.datasource")
public class DruidConfigBean {
    private Integer initialSize;
    private Integer minIdle;
    private Integer maxActive;
    
    private List<String> customs;
    
    ...
}

SpringApplicationBuilder builder = new SpringApplicationBuilder(SpringBootLearnApplication.class);
builder.application().setAdditionalProfiles("prod");
builder.run(args);

/**
 * 加强版控制器，拦截自定义的异常处理
 *
 */
@ControllerAdvice
public class CustomExceptionHandler {
    
    // 指定全局拦截的异常类型，统一处理
    @ExceptionHandler(MaxUploadSizeExceededException.class)
    public void uploadException(MaxUploadSizeExceededException e, HttpServletResponse response) throws IOException {
        response.setContentType("text/html;charset=utf-8");
        PrintWriter out = response.getWriter();
        out.write("上传文件大小超出限制");
        out.flush();
        out.close();
    }
}

@ControllerAdvice
public class CustomModelAttribute {
    
    // 
    @ModelAttribute(value = "info")
    public Map<String, String> userInfo() throws IOException {
        Map<String, String> map = new HashMap<>();
        map.put("test", "testInfo");
        return map;
    }
}
@GetMapping("/hello")
public String hello(Model model) {
    Map<String, Object> map = model.asMap();
    Map<String, String> infoMap = (Map<String, String>) map.get("info");
    return infoMap.get("test");
}

// 第一行，支持的域
@CrossOrigin(origins = "http://localhost:3000")
@RequestMapping(value = "/login", method = RequestMethod.GET)
@ResponseBody
public String login(HttpServletResponse response) {
    // 第二行，响应体添加头信息（这一行是解决上面的提示）
    response.setHeader("Access-Control-Allow-Credentials", "true");
    return HttpRequestUtils.login();
}

/**
 * 自定义 MVC 拦截器
 */
public class MyInterceptor implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        // 在 controller 方法之前调用
        return true;
    }
    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
        // 在 controller 方法之后调用
    }
    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        // 在 postHandle 方法之后调用
    }
}

/**
 * 全局控制的 mvc 配置
 */
@Configuration
public class MyWebMvcConfig implements WebMvcConfigurer {
    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        registry.addInterceptor(new MyInterceptor())
                // 表示拦截的 URL
                .addPathPatterns("/**")
                // 表示需要排除的路径
                .excludePathPatterns("/hello");
    }
}

@Autowired
private RedisTemplate redisTemplate;
@Autowired
private StringRedisTemplate stringRedisTemplate;
@GetMapping("/testRedis")
public Book getForRedis() {
    ValueOperations<String, String> ops1 = stringRedisTemplate.opsForValue();
    ops1.set("name", "Go 语言实战");
    String name = ops1.get("name");
    System.out.println(name);
    ValueOperations ops2 = redisTemplate.opsForValue();
    Book book = (Book) ops2.get("b1");
    if (book == null) {
        book = new Book("Go 语言实战", 2, "none name", BigDecimal.ONE);
        ops2.set("b1", book);
    }
    return book;
}

@Autowired
private JavaMailSender javaMailSender;
@Override
public void sendHtmlMail(String from, String to, String subject, String content) {
    try {
        MimeMessage message = javaMailSender.createMimeMessage();
        MimeMessageHelper helper = new MimeMessageHelper(message, true);
        helper.setFrom(from);
        helper.setTo(to);
        helper.setSubject(subject);
        helper.setText(content, true);
        javaMailSender.send(message);
    } catch (MessagingException e) {
        System.out.println("发送邮件失败");
        log.error("发送邮件失败", e);
    }
}

@Autowired
private MailService mailService;
@Autowired
private TemplateEngine templateEngine;
    
@Test
public void sendThymeleafMail() {
    Context context = new Context();
    context.setVariable("subject", "图书清册");
    List<Book> books = Lists.newArrayList();
    books.add(new Book("Go 语言基础", 1, "nonename", BigDecimal.TEN));
    books.add(new Book("Go 语言实战", 2, "nonename", BigDecimal.TEN));
    books.add(new Book("Go 语言进阶", 3, "nonename", BigDecimal.TEN));
    context.setVariable("books", books);
    String mail = templateEngine.process("mailtemplate.html", context);
    mailService.sendHtmlMail("xxxx@qq.com", "xxxxxxxx@qq.com", "图书清册", mail);
}

@Configuration
@EnableSwagger2
@EnableWebMvc
public class SwaggerConfig {
    @Bean
    Docket docket() {
        return new Docket(DocumentationType.SWAGGER_2)
                .select()
                .apis(RequestHandlerSelectors.basePackage("cn.sevenyuan.demo.controller"))
                .paths(PathSelectors.any())
                .build().apiInfo(
                        new ApiInfoBuilder()
                                .description("Spring Boot learn project")
                                .contact(new Contact("JingQ", "https://github.com/vip-augus", "=-=@qq.com"))
                                .version("v1.0")
                                .title("API 测试文档")
                                .license("Apache2.0")
                                .licenseUrl("http://www.apache.org/licenese/LICENSE-2.0")
                                .build());
    }
}

@Configuration
@EnableRedisHttpSession(maxInactiveIntervalInSeconds = 60)
public class MyWebMvcConfig implements WebMvcConfigurer {
    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        registry.addResourceHandler("swagger-ui.html")
                .addResourceLocations("classpath:/META-INF/resources/");
        registry.addResourceHandler("/webjars/**")
                .addResourceLocations("classpath:/META-INF/resources/webjars/");
    }
}