SpringBoot笔记

@SpringBootApplication
public class Springdemo02Application {

    public static void main(String[] args) {
        SpringApplication.run(Springdemo02Application.class, args);
    }
}

@Target({ElementType.TYPE})
@Retention(RetentionPolicy.RUNTIME)
@Documented
@Inherited
@SpringBootConfiguration
@EnableAutoConfiguration
@ComponentScan(
    excludeFilters = {@Filter(
    type = FilterType.CUSTOM,
    classes = {TypeExcludeFilter.class}
), @Filter(
    type = FilterType.CUSTOM,
    classes = {AutoConfigurationExcludeFilter.class}
)}
)
public @interface SpringBootApplication {
    @AliasFor(
        annotation = EnableAutoConfiguration.class
    )
    Class<?>[] exclude() default {};

    @AliasFor(
        annotation = EnableAutoConfiguration.class
    )
    String[] excludeName() default {};

    @AliasFor(
        annotation = ComponentScan.class,
        attribute = "basePackages"
    )
    String[] scanBasePackages() default {};

    @AliasFor(
        annotation = ComponentScan.class,
        attribute = "basePackageClasses"
    )
    Class<?>[] scanBasePackageClasses() default {};

    @AliasFor(
        annotation = ComponentScan.class,
        attribute = "nameGenerator"
    )
    Class<? extends BeanNameGenerator> nameGenerator() default BeanNameGenerator.class;

    @AliasFor(
        annotation = Configuration.class
    )
    boolean proxyBeanMethods() default true;
}

@Target({ElementType.TYPE})
@Retention(RetentionPolicy.RUNTIME)
@Documented
@Inherited
@AutoConfigurationPackage
@Import({AutoConfigurationImportSelector.class})
public @interface EnableAutoConfiguration {
    String ENABLED_OVERRIDE_PROPERTY = "spring.boot.enableautoconfiguration";

    Class<?>[] exclude() default {};

    String[] excludeName() default {};
}

/**
 * @author zhang
 * @date 2020/10/10 9:39
 */
@Controller
public class HelloController {

    @Value("${person.name}")
    private String name;
    @Value("${person.age}")
    private int age;


    @ResponseBody
    @RequestMapping("/index")
    public String index(){
        System.out.println(name + "---------" + age);
        return "Hello Spring Boot";
    }
}

/**
 * @author zhang
 * @date 2020/10/10 9:39
 */
@Controller
@ConfigurationProperties(prefix = "person")
public class HelloController {

    private String name;
    private int age;


    @ResponseBody
    @RequestMapping("/index")
    public String index(){
        System.out.println(name + "---------" + age);
        return "Hello Spring Boot";
    }


    public void setName(String name) {
        this.name = name;
    }

    public void setAge(int age) {
        this.age = age;
    }
}

@SpringBootTest(classes = Springdemo1Application.class)
@RunWith(SpringRunner.class)

/**
 * @author zhang
 * @date 2020/10/12 9:42
 */
@Controller
public class HelloController {

    @RequestMapping("/index")
    public String index(Model model){
        User user = new User(1L,"张三",new Date());
        model.addAttribute("user",user);
        model.addAttribute("num",10);
        model.addAttribute("gender","w");
        return "hello";
    }
}

/**
 * @author zhang
 * @date 2020/10/12 15:54
 */
@Controller
@RequestMapping("/user")
public class UserController {
    @RequestMapping("/userList")
    public String userList(Model model){
        List<User> list = new ArrayList<>();
        list.add(new User(1L,"张三",new Date()));
        list.add(new User(2L,"李四",new Date()));
        list.add(new User(3L,"王五",new Date()));
        list.add(new User(4L,"赵六",new Date()));
        list.add(new User(5L,"田七",new Date()));

        model.addAttribute("userList",list);
        return "user";
    }
}

@RequestMapping("/edit")
public String editUser(int id){
    System.out.println("要修改的id是" + id);
    return "user";
}

@RequestMapping("/delete/{id}")
public String deleteUser(@PathVariable("id") int id){
    System.out.println("要删除的id是:" + id);
    return "user";
}

@ControllerAdvice
public class WebException {
    @ExceptionHandler(value = Exception.class)
    public ModelAndView defaultException(Exception e, HttpServletRequest request){
        ModelAndView mv=new ModelAndView();
        mv.setViewName("error");
        //异常对象
        mv.addObject("exception",e);
        //异常请求
        mv.addObject("url",request.getRequestURI());
        return  mv;
    }

public class WebInterceptor implements HandlerInterceptor {
    /**
     *
     * @param request
     * @param response
     * @param handler
     * @return
     * @throws Exception
     *
     * 登录验证：
     * 拦截所有请求
     * 对于登录请求放行
     * 非登录请求进行登录验证（currUser是否为空）
     */
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        String uri=request.getRequestURI();
        System.out.println(uri);
        if(uri.endsWith("/login")||uri.endsWith("/toLogin")||uri.endsWith("/")){
            //登录请求 放行
            return true;
        }
        //
        HttpSession session=request.getSession();
        Object user=session.getAttribute("currUser");
        if(user==null){
            //未登录
            //跳转到登录页
            response.sendRedirect(request.getContextPath()+"/toLogin");
            return  false;
        }
        return true;
    }
}

@Configuration
public class WebMvc implements WebMvcConfigurer {
    //注册拦截器
    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        registry.addInterceptor(new WebInterceptor()).addPathPatterns("/**")
        .excludePathPatterns("/css/**")
        .excludePathPatterns("/js/**")
        .excludePathPatterns("/images/**");
    }
}

@Configuration
public class WebMvc implements WebMvcConfigurer {
    /**
     *
     * @param registry
     * registry给指定的视图添加控制层
     * login
     */
    @Override
    public void addViewControllers(ViewControllerRegistry registry) {
        //http://localhost:8088/ProductWeb/
        registry.addViewController("/").setViewName("login");
        registry.addViewController("/toLogin").setViewName("login");
    }
}

/**
 * @author zhang
 * @date 2020/10/14 9:20
 */
@Controller
@RequestMapping("/file")
public class FileUploadController {

    @Value("${imgFile}")
    private String targetPath;

    @RequestMapping("/uploadPage")
    public String uploadPage(){
        return "/upload/fileupload";
    }

    @RequestMapping("/upload")
    public String upload(MultipartFile imgFile, Model model) throws IOException {
        //获取文件名称，包含上传文件的后缀
        String fileName = imgFile.getOriginalFilename();

        //获取文件上传的后缀名
        assert fileName != null;
        String suffix = fileName.substring(fileName.lastIndexOf("."));

        //文件重命名
        fileName = UUID.randomUUID().toString().replace("-","").toLowerCase() + suffix;
        System.out.println("上传的文件名称:"+fileName);
        System.out.println("上传的路径" + targetPath);
        //上传
        imgFile.transferTo(new File(targetPath,fileName));
        model.addAttribute("path",fileName);
        return "upload/show";
    }