修改java内容

Author: tjlizz

Java/api自动增加前缀.md

@@ -0,0 +1,62 @@
+* AutoPrefixUrlMapping.java
+```java
+public class AutoPrefixUrlMapping extends RequestMappingHandlerMapping {
+
+    @Value("${api-package}")
+    private String apiPackagePath;
+
+    @Override
+    protected RequestMappingInfo getMappingForMethod(Method method, Class<?> handlerType) {
+        RequestMappingInfo mappingInfo =  super.getMappingForMethod(method, handlerType);
+        if(mappingInfo != null){
+            String prefix = this.getPrefix(handlerType);
+            return RequestMappingInfo.paths(prefix).build().combine(mappingInfo);
+        }
+        return mappingInfo;
+    }
+
+    private String getPrefix(Class<?> handlerType){
+        String packageName = handlerType.getPackage().getName();
+        String dotPath = packageName.replaceAll(this.apiPackagePath,"");
+        return dotPath.replace(".", "/");
+    }
+}
+```
+
+* AutoPrefixConfiguration.java
+```java
+
+@Configuration
+public class AutoPrefixConfiguration implements WebMvcRegistrations {
+
+    @Override
+    public RequestMappingHandlerMapping getRequestMappingHandlerMapping() {
+        return new AutoPrefixUrlMapping();
+    }
+}
+```
+
+
+* application.yml
+
+```yml
+  api-package: com.example.demo
+```
+* DemoController
+
+```java
+@RestController
+@RequestMapping("/demo")
+public class DemoController {
+
+    @GetMapping("/a")
+    public ResponseEntity getUser() {
+        return ResponseEntity.status(HttpStatus.OK).body("22");
+    }
+
+```
+ *  目录结构
+
+  ![2](/img/java/api.png)
+
+请求地址:http://localhost:8080/api/demo/a

README.md

@@ -23,4 +23,6 @@
 
   * [扫一扫登录](./webChat/扫一扫登录.md)
 
-
+# java
+ *  [api地址自动增加前缀](./Java/api自动增加前缀.md)
+ *  [springboot使用@value注入静态属性](./Java/Springboot使用@value注入静态属性.md)