spring:
  mvc:
    contentnegotiation:
      favor-parameter: false
      favor-path-extension: false

@Configuration
public class WebConfig implements WebMvcConfigurer {
    
    @Override
    public void configureContentNegotiation(ContentNegotiationConfigurer configurer) {
        configurer
            .defaultContentType(MediaType.APPLICATION_JSON)
            .favorParameter(false)
            .favorPathExtension(false)
            .ignoreAcceptHeader(false);  // 確保不忽略Accept頭
    }
}

@RestController
@RequestMapping("/api/products")
public class ProductController {
    
    private final ProductService productService;
    
    public ProductController(ProductService productService) {
        this.productService = productService;
    }
    
    @GetMapping("/{id}")
    public Product getProduct(@PathVariable Long id) {
        return productService.findById(id);
    }
    
    @GetMapping
    public List<Product> getAllProducts() {
        return productService.findAll();
    }
}

// 請(qǐng)求JSON格式
GET /api/products HTTP/1.1
Accept: application/json

// 請(qǐng)求XML格式
GET /api/products HTTP/1.1
Accept: application/xml

// 請(qǐng)求HTML格式
GET /api/products HTTP/1.1
Accept: text/html

<dependency>
    <groupId>com.fasterxml.jackson.dataformat</groupId>
    <artifactId>jackson-dataformat-xml</artifactId>
</dependency>

spring:
  mvc:
    contentnegotiation:
      favor-path-extension: true
      # 明確指定路徑擴(kuò)展名與媒體類型的映射關(guān)系
      media-types:
        json: application/json
        xml: application/xml
        html: text/html

@Configuration
public class WebConfig implements WebMvcConfigurer {
    
    @Override
    public void configureContentNegotiation(ContentNegotiationConfigurer configurer) {
        configurer
            .favorPathExtension(true)
            .ignoreAcceptHeader(false)
            .defaultContentType(MediaType.APPLICATION_JSON)
            .mediaType("json", MediaType.APPLICATION_JSON)
            .mediaType("xml", MediaType.APPLICATION_XML)
            .mediaType("html", MediaType.TEXT_HTML);
    }
}

@Configuration
public class WebConfig implements WebMvcConfigurer {
    
    @Override
    public void configurePathMatch(PathMatchConfigurer configurer) {
        UrlPathHelper urlPathHelper = new UrlPathHelper();
        urlPathHelper.setRemoveSemicolonContent(false);
        configurer.setUrlPathHelper(urlPathHelper);
    }
}

// 請(qǐng)求JSON格式
GET /api/products.json

// 請(qǐng)求XML格式
GET /api/products.xml

@Component
public class UrlRewriteFilter extends OncePerRequestFilter {
    
    @Override
    protected void doFilterInternal(HttpServletRequest request,
                                  HttpServletResponse response,
                                  FilterChain filterChain) throws ServletException, IOException {
        
        HttpServletRequest wrappedRequest = new HttpServletRequestWrapper(request) {
            @Override
            public String getRequestURI() {
                String uri = super.getRequestURI();
                return urlRewrite(uri);
            }
        };
        
        filterChain.doFilter(wrappedRequest, response);
    }
    
    private String urlRewrite(String url) {
        // 實(shí)現(xiàn)URL重寫(xiě)邏輯，例如添加缺失的文件擴(kuò)展名
        return url;
    }
}

spring:
  mvc:
    contentnegotiation:
      favor-parameter: true
      parameter-name: format  # 默認(rèn)為"format"，可自定義
      media-types:
        json: application/json
        xml: application/xml
        html: text/html

@Configuration
public class WebConfig implements WebMvcConfigurer {
    
    @Override
    public void configureContentNegotiation(ContentNegotiationConfigurer configurer) {
        configurer
            .favorParameter(true)
            .parameterName("format")
            .ignoreAcceptHeader(false)
            .defaultContentType(MediaType.APPLICATION_JSON)
            .mediaType("json", MediaType.APPLICATION_JSON)
            .mediaType("xml", MediaType.APPLICATION_XML)
            .mediaType("html", MediaType.TEXT_HTML);
    }
}

// 請(qǐng)求JSON格式
GET /api/products?format=json

// 請(qǐng)求XML格式
GET /api/products?format=xml

@Configuration
public class WebConfig implements WebMvcConfigurer {
    
    @Override
    public void configureContentNegotiation(ContentNegotiationConfigurer configurer) {
        configurer
            .favorParameter(true)
            .parameterName("format")
            .ignoreAcceptHeader(false)  // 不忽略Accept頭
            .defaultContentType(MediaType.APPLICATION_JSON)
            .mediaType("json", MediaType.APPLICATION_JSON)
            .mediaType("xml", MediaType.APPLICATION_XML)
            .mediaType("html", MediaType.TEXT_HTML);
    }
}

public class CustomContentNegotiationStrategy implements ContentNegotiationStrategy {
    
    @Override
    public List<MediaType> resolveMediaTypes(NativeWebRequest request) throws HttpMediaTypeNotAcceptableException {
        String userAgent = request.getHeader("User-Agent");
        
        // 基于User-Agent進(jìn)行內(nèi)容協(xié)商
        if (userAgent != null) {
            if (userAgent.contains("Mozilla")) {
                return Collections.singletonList(MediaType.TEXT_HTML);
            } else if (userAgent.contains("Android") || userAgent.contains("iPhone")) {
                return Collections.singletonList(MediaType.APPLICATION_JSON);
            }
        }
        
        // 默認(rèn)返回JSON
        return Collections.singletonList(MediaType.APPLICATION_JSON);
    }
}

@Configuration
public class WebConfig implements WebMvcConfigurer {
    
    @Override
    public void configureContentNegotiation(ContentNegotiationConfigurer configurer) {
        configurer.strategies(Arrays.asList(
            new CustomContentNegotiationStrategy(),
            new HeaderContentNegotiationStrategy()
        ));
    }
}

@RestController
@RequestMapping("/api/products")
public class ProductController {
    
    private final ProductService productService;
    
    // 通用的JSON/XML響應(yīng)
    @GetMapping("/{id}")
    public ProductDto getProduct(@PathVariable Long id) {
        Product product = productService.findById(id);
        return new ProductDto(product);  // 轉(zhuǎn)換為DTO避免實(shí)體類暴露
    }
    
    // 針對(duì)HTML的特殊處理
    @GetMapping(value = "/{id}", produces = MediaType.TEXT_HTML_VALUE)
    public ModelAndView getProductHtml(@PathVariable Long id) {
        Product product = productService.findById(id);
        
        ModelAndView mav = new ModelAndView("product-detail");
        mav.addObject("product", product);
        mav.addObject("relatedProducts", productService.findRelated(product));
        
        return mav;
    }
    
    // 針對(duì)移動(dòng)客戶端的精簡(jiǎn)響應(yīng)
    @GetMapping(value = "/{id}", produces = "application/vnd.company.mobile+json")
    public ProductMobileDto getProductForMobile(@PathVariable Long id) {
        Product product = productService.findById(id);
        return new ProductMobileDto(product);  // 包含移動(dòng)端需要的精簡(jiǎn)信息
    }
}