Springboot+AOP实现返回数据提示语国际化的示例代码

<dependencies>

         <dependency>

             <groupid>org.springframework.boot</groupid>

             <artifactid>spring-boot-starter-web</artifactid>

         </dependency>

         <dependency>

             <groupid>com.alibaba</groupid>

             <artifactid>fastjson</artifactid>

             <version> 1.2 . 68 </version>

         </dependency>

         <dependency>

             <groupid>org.apache.commons</groupid>

             <artifactid>commons-lang3</artifactid>

             <version> 3.9 </version>

         </dependency>

         <dependency>

             <groupid>org.projectlombok</groupid>

             <artifactid>lombok</artifactid>

             <version> 1.18 . 10 </version>

             <scope>provided</scope>

         </dependency>

         <dependency>

             <groupid>org.springframework.boot</groupid>

             <artifactid>spring-boot-starter-aop</artifactid>

         </dependency>

         <dependency>

             <groupid>org.springframework.boot</groupid>

             <artifactid>spring-boot-starter-test</artifactid>

             <scope>test</scope>

         </dependency>

     </dependencies>

/**

  * @author jcccc

  */

public enum codeenum {

     success( 1000 , "请求成功" ),

     fail( 2000 , "请求失败" );

     public final int code;

     public final string msg;

     public integer getcode() {

         return this .code;

     }

     codeenum( int code, string msg) {

         this .code = code;

         this .msg = msg;

     }

     public string getmsg() {

         return this .msg;

     }

}

import com.test.myi18n.enums.codeenum;

import lombok.data;

/**

  * @author jcccc

  */

@data

public class resultdata<t> {

     private integer code;

     private string message;

     private t data;

     public resultdata( int code, string message) {

         this .code = code;

         this .message = message;

     }

     public static resultdata success(codeenum codeenum) {

         return new resultdata(codeenum.code, codeenum.msg);

     }

     public static resultdata success(string msg) {

         return new resultdata(codeenum.success.getcode(),msg);

     }

}

import org.springframework.beans.factory.annotation.autowired;

import org.springframework.context.messagesource;

import org.springframework.context.i18n.localecontextholder;

import org.springframework.stereotype.component;

import java.util.locale;

/**

  * @author jcccc

  */

@component

public class localemessage {

     @autowired

     private messagesource messagesource;

     public string getmessage(string code){

         return this .getmessage(code, new object[]{});

     }

     public string getmessage(string code,string defaultmessage){

         return this .getmessage(code, null ,defaultmessage);

     }

     public string getmessage(string code,string defaultmessage,locale locale){ return this .getmessage(code, null ,defaultmessage,locale); }

     public string getmessage(string code,locale locale){

         return this .getmessage(code, null , "" ,locale);

     }

     public string getmessage(string code,object[] args){ return this .getmessage(code,args, "" ); }

     public string getmessage(string code,object[] args,locale locale){

         return this .getmessage(code,args, "" ,locale);

     }

     public string getmessage(string code,object[] args,string defaultmessage){ return this .getmessage(code,args, defaultmessage,localecontextholder.getlocale()); }

     public string getmessage(string code,object[]args,string defaultmessage,locale locale){ return messagesource.getmessage(code,args, defaultmessage,locale); }

}

import java.util.locale;

import com.test.myi18n.message.localemessage;

import org.springframework.beans.factory.annotation.autowired;

import org.springframework.stereotype.component;

@component

public class i18nutils {

     @autowired

     private localemessage localemessage;

     /**

      * 获取key

      *

      * @param key

      * @return

      */

     public   string getkey(string key) {

         string name = localemessage.getmessage(key);

         return name;

     }

     /**

      * 获取指定哪个配置文件下的key

      *

      * @param key

      * @param local

      * @return

      */

     public   string getkey(string key, locale local) {

         string name = localemessage.getmessage(key, local);

         return name;

     }

}

import lombok.allargsconstructor;

import org.apache.commons.lang3.stringutils;

import org.aspectj.lang.joinpoint;

import org.aspectj.lang.annotation.afterreturning;

import org.aspectj.lang.annotation.aspect;

import org.aspectj.lang.annotation.pointcut;

import org.springframework.beans.factory.annotation.autowired;

import org.springframework.boot.autoconfigure.condition.conditionalonproperty;

import org.springframework.stereotype.component;

import org.springframework.web.context.request.requestattributes;

import org.springframework.web.context.request.requestcontextholder;

import javax.servlet.http.httpservletrequest;

import java.util.*;

/**

  * @author jcccc

  */

@aspect

@component

@allargsconstructor

@conditionalonproperty (prefix = "lang" , name = "open" , havingvalue = "true" )

public class languageaspect {

     @autowired

     i18nutils i18nutils;

     @pointcut ( "execution(* com.test.myi18n.controller.*.*(..)))" )

     public void annotationlangcut() {

     }

     /**

      * 拦截controller层返回的结果，修改msg字段

      *

      * @param point

      * @param obj

      */

     @afterreturning (pointcut = "annotationlangcut()" , returning = "obj" )

     public void around(joinpoint point, object obj) {

         object resultobject = obj;

         try {

             requestattributes requestattributes = requestcontextholder.getrequestattributes();

             //从获取requestattributes中获取httpservletrequest的信息

             httpservletrequest request = (httpservletrequest) requestattributes.resolvereference(requestattributes.reference_request);

             string langflag = request.getheader( "lang" );

             if ( null != langflag) {

                 resultdata r = (resultdata) obj;

                 string msg = r.getmessage().trim();

                 if (stringutils.isnotempty(msg)) {

                     if ( "cn" .equals(langflag)) {

                         locale locale = locale.china;

                         msg = i18nutils.getkey(msg, locale);

                     } else if ( "en" .equals(langflag)) {

                         locale locale = locale.us;

                         msg = i18nutils.getkey(msg, locale);

                     } else {

                         msg = i18nutils.getkey(msg);

                     }

                 }

                 r.setmessage(msg);

             }

         } catch (exception e) {

             e.printstacktrace();

             //返回原值

             obj = resultobject;

         }

     }

}

@getmapping ( "test" )

    public resultdata test( @requestparam int testnum) {

        if ( 1 ==testnum){

            return resultdata.success(codeenum.success);

        }

        if ( 2 ==testnum){

            return resultdata.success(codeenum.fail);

        }

        if ( 3 ==testnum){

            return resultdata.success( "自定义的返回语" );

        }

        return resultdata.success(codeenum.success);

    }