restapi-version

package com.cwteam.demo.version; import java.util.regex.Matcher; import java.util.regex.Pattern; import javax.servlet.http.HttpServletRequest; import org.springframework.web.servlet.mvc.condition.RequestCondition; /** * @author cwteam * @date 2017-08-14 * @desc * 首先，匹配过滤出当前访问接口中是否存在v(1-9)， * 如果存在，继续判断格式是否对，否则报错返回。 * 其次，比较请求地址中版本与控制器中版本，如果 * 请求的版本值大于控制器中版本值，则取控制器版本 * 值继续接口后续访问操作。 */ public class ApiVerCondition implements RequestCondition<ApiVerCondition> { private final static Pattern VERSION_PREFIX_PATTERN = Pattern.compile("v(\\d+)/"); private int apiVersion; public ApiVerCondition(int apiVersion){ this.apiVersion = apiVersion; } public ApiVerCondition combine(ApiVerCondition other) { return new ApiVerCondition(other.getApiVersion()); } public ApiVerCondition getMatchingCondition(HttpServletRequest request) { Matcher m = VERSION_PREFIX_PATTERN.matcher(request.getRequestURI()); if(m.find()){ Integer version = Integer.valueOf(m.group(1)); if(version >= this.apiVersion) return this; } return null; } public int compareTo(ApiVerCondition other, HttpServletRequest request) { return other.getApiVersion() - this.apiVersion; } public int getApiVersion() { return apiVersion; } }