基於SpringCloud+vue(ElementUI)+mySQL先後端分離設計之--搭建Beans編寫Token解析註解

開發一個博客系統

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搭建eureka註冊中心 （請先閱讀此文章） https://segmentfault.com/a/11...
搭建Beans編寫Token解析註解 https://segmentfault.com/a/11...
搭建權限管理系統 https://segmentfault.com/a/11...
搭建後臺管理系統 https://segmentfault.com/a/11...
前端Fetch請求封裝 https://segmentfault.com/a/11...

1.建立一個maven的空項目,寫本身的Entity和工具類在打包以後在其餘項目中引入 就能夠了;

IDEA打包部署項目到maven

在Idea中的最右邊的導航欄中能夠看到一個Maven Projects，單擊打開，如圖所示：

引入Beans項目到當前項目：

<dependency>
    <groupId>com.server</groupId>
    <artifactId>beans</artifactId>
    <version>1.0-SNAPSHOT</version>
</dependency>

編寫Token解析註解（Token的字符串-解析爲->爲TokenEntity實體）

註解解析Token實例

TokenEntity實體
public class TokenEntity{
    private String userId;
    private String token;
    private Date expiresDate; //過時時間
    private Date createDate;  //建立時間

    public TokenEntity(String userId, String token, Date expiresDate, Date createDate) {
        this.userId = userId;
        this.token = token;
        this.expiresDate = expiresDate;
        this.createDate = createDate;
    }

    public TokenEntity() {
        super();
    }

    get/set方法略

解析Token的工具類中的方法（此方法根據本身具體如何解析token來編寫）
public static Object getToken(String token,String key) throws Exception {
        DecodedJWT jwt = verifyToken(token,key);
        Map<String, Claim> map = jwt.getClaims();
        TokenEntity bean = new TokenEntity();
        bean.setUserId(map.get("userId").asString());
        bean.setToken(token);
        bean.setExpiresDate(jwt.getIssuedAt());
        bean.setCreateDate(jwt.getExpiresAt());
        return bean;
    }

主要註解相關內容來了

註解類
import java.lang.annotation.*;

@Target(ElementType.PARAMETER)
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface RequestToken {
    String value();
}

解析類
import com.server.authority.util.TokenUtil;
import com.server.config.SysBaseConfig;
import org.springframework.core.MethodParameter;
import org.springframework.web.bind.support.WebDataBinderFactory;
import org.springframework.web.context.request.NativeWebRequest;
import org.springframework.web.method.support.HandlerMethodArgumentResolver;
import org.springframework.web.method.support.ModelAndViewContainer;

public class RequestTokenAnalysis implements HandlerMethodArgumentResolver{
    @Override
    public boolean supportsParameter(MethodParameter methodParameter) {
        return methodParameter.hasParameterAnnotation(RequestToken.class);
    }

    @Override
    public Object resolveArgument(MethodParameter methodParameter, ModelAndViewContainer modelAndViewContainer, NativeWebRequest nativeWebRequest, WebDataBinderFactory webDataBinderFactory) throws Exception {
        RequestToken token = methodParameter.getParameterAnnotation(RequestToken.class);
        String value = token.value();
        Class clazz = methodParameter.getParameterType();
        String data = nativeWebRequest.getParameter(value);
        if (data == null) {
            return clazz.newInstance();
        }
        Object object = TokenUtil.getToken(data, SysBaseConfig.TOKEN_KEY);
        return object;
    }
}

測試註解類
@RequestMapping(value = "/token",method = RequestMethod.GET)
    @ResponseBody
    public TResponse userToken(@RequestToken(ParameterNames.ACCESS_TOKEN) TokenEntity token){
        try{
            return authorityService.userVerify(token.getToken());
        }catch (Exception e){
            return tResponse.getTResponse("oxs-pai-appMenu","zh_CN", e.getMessage(), SResponse.getInstance().getSResponse(StatusCode.USER_DEFINED,"異常"));
        }
    }

例如地址:http://127.0.0.1:8762/auth/token
請求頭中添加：at=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJleHAiOjE1MzI2NTI3MTIsInVzZXJJZCI6IjEiLCJpYXQiOjE1MzI1NjYzMTJ9.z1MweHILT6f2KeUumVSNuuY0F9EYsePQp5JmKJiwDuc

注入註解

import com.server.authority.annotation.RequestTokenAnalysis;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
import org.springframework.web.method.support.HandlerMethodArgumentResolver;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;

import java.util.List;

@SpringBootApplication
@EnableEurekaClient
public class AuthorityApplication extends WebMvcConfigurerAdapter {

    public static void main(String[] args) {
        SpringApplication.run(AuthorityApplication.class, args);
    }

    @Override
    public void addArgumentResolvers(List<HandlerMethodArgumentResolver> argumentResolvers) {
        argumentResolvers.add(new RequestTokenAnalysis());
        super.addArgumentResolvers(argumentResolvers);
    }
}

總結：可以成功解析出TokenEntity