3-4 通用功能与配置

1. 加解密工具

上面的三个包在资料里面找

2. 通用json返回类

 

public class JsonResponse {

    private String code;

    private String msg;

    private T data;

    public JsonResponse(String code, String msg){
        this.code = code;
        this.msg = msg;
    }

    public JsonResponse(T data){
        this.data = data;
        msg = "成功";
        code = "0";
    }

    public static JsonResponse success(){
        return new JsonResponse<>(null);
    }

    public static JsonResponse success(String data){
        return new JsonResponse<>(data);
    }

    public static JsonResponse fail(){
        return new JsonResponse<>("1", "失败");
    }

    public static JsonResponse fail(String code, String msg){
        return new JsonResponse<>(code, msg);
    }

    public String getCode() {
        return code;
    }

    public void setCode(String code) {
        this.code = code;
    }

    public String getMsg() {
        return msg;
    }

    public void setMsg(String msg) {
        this.msg = msg;
    }

    public T getData() {
        return data;
    }

    public void setData(T data) {
        this.data = data;
    }
}

写在dao包下的com.imooc.bilibili.domain

3. JSON信息转换配置

引入依赖

写在service下的config包下 

@Configuration
public class JsonHttpMessageConverterConfig {

    @Bean
    @Primary
    public HttpMessageConverters fastJsonHttpMessageConverters(){
        FastJsonHttpMessageConverter fastConverter = new FastJsonHttpMessageConverter();
        FastJsonConfig fastJsonConfig = new FastJsonConfig();
        fastJsonConfig.setDateFormat("yyyy-MM-dd HH:mm:ss");
        fastJsonConfig.setSerializerFeatures(
                SerializerFeature.PrettyFormat,
                SerializerFeature.WriteNullStringAsEmpty,
                SerializerFeature.WriteNullListAsEmpty,
                SerializerFeature.WriteMapNullValue,
                SerializerFeature.MapSortField,
                SerializerFeature.DisableCircularReferenceDetect
        );
        fastConverter.setFastJsonConfig(fastJsonConfig);
        //如果使用feign进行微服务间的接口调用，则需要加上该配置
        fastConverter.setSupportedMediaTypes(Collections.singletonList(MediaType.APPLICATION_JSON));
        return new HttpMessageConverters(fastConverter);
    }
}

4. 全局异常处理配置

写在dao服务下的exception包下

public class ConditionException extends RuntimeException{

    private static final long serialVersionUID = 1L;

    private String code;

    public ConditionException(String code, String name){
        super(name);
        this.code = code;
    }

    public ConditionException(String name){
        super(name);
        code = "500";
    }

    public String getCode() {
        return code;
    }

    public void setCode(String code) {
        this.code = code;
    }
}

写在service下的handler包下

@ControllerAdvice
@Order(Ordered.HIGHEST_PRECEDENCE)
public class CommonGlobalExceptionHandler {

    @ExceptionHandler(value = Exception.class)
    @ResponseBody
    public JsonResponse commonExceptionHandler(HttpServletRequest request, Exception e){
        String errorMsg = e.getMessage();
        if(e instanceof ConditionException){
            String errorCode = ((ConditionException)e).getCode();
            return new JsonResponse<>(errorCode, errorMsg);
        }else{
            return new JsonResponse<>("500",errorMsg);
        }
    }
}