内容协商 contentNegotiation 的使用

pom.xml

@@ -166,6 +166,10 @@
             <scope>system</scope>
             <systemPath>${project.basedir}/src/main/resources/lib/doudian-sdk-java-1.0.0-20220509171318.jar</systemPath>
         </dependency>
+        <dependency>
+            <groupId>com.fasterxml.jackson.dataformat</groupId>
+            <artifactId>jackson-dataformat-xml</artifactId>
+        </dependency>
     </dependencies>
 
     <!-- 阿里云maven仓库 -->

src/main/java/com/api/config/WebMvcConfig.java

@@ -8,16 +8,26 @@
 
 package com.api.config;
 
+import com.api.converter.CustomMessageConverter;
+import com.api.form.ChildConvertForm;
 import com.common.interceptor.AuthorizationInterceptor;
 import com.api.resolver.LoginUserHandlerMethodArgumentResolver;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.context.annotation.Configuration;
+import org.springframework.core.convert.converter.Converter;
+import org.springframework.format.FormatterRegistry;
+import org.springframework.http.MediaType;
+import org.springframework.http.converter.HttpMessageConverter;
+import org.springframework.web.accept.ParameterContentNegotiationStrategy;
 import org.springframework.web.method.support.HandlerMethodArgumentResolver;
+import org.springframework.web.servlet.config.annotation.ContentNegotiationConfigurer;
 import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
 import org.springframework.web.servlet.config.annotation.PathMatchConfigurer;
 import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
 import org.springframework.web.util.UrlPathHelper;
 
+import java.util.Arrays;
+import java.util.HashMap;
 import java.util.List;
 
 /**
@@ -49,4 +59,37 @@ public class WebMvcConfig implements WebMvcConfigurer {
         urlPathHelper.setRemoveSemicolonContent(false);
         configurer.setUrlPathHelper(urlPathHelper);
     }
+
+    @Override
+    public void addFormatters(FormatterRegistry registry) {
+        registry.addConverter(new Converter<String, ChildConvertForm>() {
+            @Override
+            public ChildConvertForm convert(String s) {
+                if(!s.isEmpty()) {
+                    String[] split = s.split(",");
+                    ChildConvertForm childConvertForm = new ChildConvertForm();
+                    childConvertForm.setChildName(split[0]);
+                    childConvertForm.setChildAge(Integer.parseInt(split[1]));
+                    return childConvertForm;
+                }
+                return null;
+            }
+        });
+    }
+
+    @Override
+    public void extendMessageConverters(List<HttpMessageConverter<?>> converters) {
+        converters.add(new CustomMessageConverter());
+    }
+
+    @Override
+    public void configureContentNegotiation(ContentNegotiationConfigurer configurer) {
+        HashMap<String, MediaType> stringMediaTypeHashMap = new HashMap<>();
+        stringMediaTypeHashMap.put("json",MediaType.APPLICATION_JSON);
+        stringMediaTypeHashMap.put("xml",MediaType.APPLICATION_XML);
+        stringMediaTypeHashMap.put("zxy",MediaType.parseMediaType("application/x-zxy"));
+        ParameterContentNegotiationStrategy parameterContentNegotiationStrategy =
+                new ParameterContentNegotiationStrategy(stringMediaTypeHashMap);
+        configurer.strategies(Arrays.asList(parameterContentNegotiationStrategy));
+    }
 }

src/main/java/com/api/controller/ApiTestController.java

@@ -78,6 +78,7 @@ public class ApiTestController extends AbsctactController {
     @ApiOperation("忽略Token验证测试")
     public R notToken1(@RequestParam Map<String,String> testQuery){
 //        return R.ok().put("msg", "无需token也能访问。。。");
+        System.out.println("notoken");
         return R.ok().put( "无需token也能访问。。。");
     }
 //    @GetMapping("notToken")

src/main/java/com/api/controller/ModelAndMapController.java

@@ -0,0 +1,53 @@
+package com.api.controller;
+
+import com.api.form.LoginForm;
+import org.springframework.stereotype.Controller;
+import org.springframework.ui.Model;
+import org.springframework.web.bind.annotation.*;
+
+import javax.servlet.http.Cookie;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import java.util.Map;
+
+@Controller
+@RequestMapping("/ModelAndMap")
+public class ModelAndMapController {
+    @GetMapping("/goto")
+    public String goTo(
+            Map<String,Object> map,
+            Model model,
+            HttpServletResponse response,
+            HttpServletRequest request) {
+        map.put("m1","v1");
+        model.addAttribute("m2","v2");
+        Cookie cookie = new Cookie("cookie_key", "cookieValue");
+        cookie.setDomain("localhost");
+        response.addCookie(cookie);
+        request.setAttribute("zhang","xiaoyu");
+        return "forward:/ModelAndMap/success";
+    }
+    @GetMapping("/success")
+    @ResponseBody
+    public LoginForm success(@RequestAttribute("zhang") String zhang,
+                          HttpServletRequest request) {
+        LoginForm loginForm = new LoginForm();
+        loginForm.setMobile("mobile");
+        loginForm.setPassword("zxys");
+        return loginForm;
+    }
+    @GetMapping("getTest")
+    @ResponseBody
+    public LoginForm getTest() {
+        LoginForm loginForm = new LoginForm();
+        loginForm.setMobile("mobile");
+        loginForm.setPassword("zxys");
+        return loginForm;
+    }
+    @PostMapping("postTest")
+    @ResponseBody
+    public LoginForm postTest(LoginForm loginForm) {
+        return loginForm;
+    }
+
+}

src/main/java/com/api/controller/RequestController.java

@@ -31,6 +31,6 @@ public class RequestController {
                          @MatrixVariable("name")List<String> names) {
         System.out.println(low);
         System.out.println(names);
-        return null;
+        return low;
     }
 }

src/main/java/com/api/converter/CustomMessageConverter.java

@@ -0,0 +1,42 @@
+package com.api.converter;
+
+import com.api.form.LoginForm;
+import org.springframework.http.HttpInputMessage;
+import org.springframework.http.HttpOutputMessage;
+import org.springframework.http.MediaType;
+import org.springframework.http.converter.HttpMessageConverter;
+import org.springframework.http.converter.HttpMessageNotReadableException;
+import org.springframework.http.converter.HttpMessageNotWritableException;
+
+import java.io.IOException;
+import java.io.OutputStream;
+import java.util.List;
+
+public class CustomMessageConverter implements HttpMessageConverter<LoginForm> {
+    @Override
+    public boolean canRead(Class<?> aClass, MediaType mediaType) {
+        return false;
+    }
+
+    @Override
+    public boolean canWrite(Class<?> aClass, MediaType mediaType) {
+        return aClass.isAssignableFrom(LoginForm.class);
+    }
+
+    @Override
+    public List<MediaType> getSupportedMediaTypes() {
+        return MediaType.parseMediaTypes("application/x-zxy");
+    }
+
+    @Override
+    public LoginForm read(Class<? extends LoginForm> aClass, HttpInputMessage httpInputMessage) throws IOException, HttpMessageNotReadableException {
+        return null;
+    }
+
+    @Override
+    public void write(LoginForm loginForm, MediaType mediaType, HttpOutputMessage httpOutputMessage) throws IOException, HttpMessageNotWritableException {
+        String str = loginForm.getMobile()+","+ loginForm.getPassword();
+        OutputStream body = httpOutputMessage.getBody();
+        body.write(str.getBytes());
+    }
+}

src/main/java/com/api/form/ChildConvertForm.java

@@ -0,0 +1,9 @@
+package com.api.form;
+
+import lombok.Data;
+
+@Data
+public class ChildConvertForm {
+    private String childName;
+    private Integer childAge;
+}

src/main/java/com/api/form/LoginForm.java

@@ -30,4 +30,6 @@ public class LoginForm {
     @NotBlank(message="密码不能为空")
     private String password;
 
+    private ChildConvertForm childConvertForm;
+
 }

src/main/resources/application.yml

@@ -33,6 +33,9 @@ spring:
   http:
     encoding:
       charset: UTF-8
+  mvc:
+    contentnegotiation:
+      favor-parameter: true
 renren:
   redis:
     open: false  # 是否开启redis缓存  true开启   false关闭