日常bug

日常bug

1、新建的 maven 项目没有 .classpath 文件

删除 maven 本地仓库的内容，重启 eclipse 后 Update Project（Alt+F5）

2、The bean 'adminService' could not be injected as a 'com.turtledove.service.impl.AdminService'

Description:

The bean 'adminService' could not be injected as a 'com.turtledove.service.impl.AdminService' because it is a JDK dynamic proxy that implements:
com.turtledove.service.IAdminService

Action:

Consider injecting the bean as one of its interfaces or forcing the use of CGLib-based proxies by setting proxyTargetClass=true on @EnableAsync and/or @EnableCaching.

原因：

自己实现了接口，即在action层中我注入的bean是实现类，而spring boot的事务默认是使用jdk的动态代理，即基于接口的。

解决：

1、将注入 Bean 的方式改成其接口

​ 设置 proxyTargetClass=true 在启动事务管理上@EnableTransactionManagement(proxyTargetClass=true)

2、保留接口方式注入Bean：

​ 在 Service 层对应的实现类上配置 @Scope(proxyMode = ScopedProxyMode.TARGET_CLASS)

3、Springboot 2.4.3 跨域问题

org.springframework.web.util.NestedServletException: Request processing failed; nested exception is java.lang.IllegalArgumentException:

When allowCredentials is true, allowedOrigins cannot contain the special value "*" since that cannot be set on the "Access-Control-Allow-Origin" response header. To allow credentials to a set of origins, list them explicitly or consider using "allowedOriginPatterns" instead.

修改前：

@Configuration
public class CorsConfig implements WebMvcConfigurer {
    @Override
    public void addCorsMappings(CorsRegistry registry) {
        registry.addMapping("/**")
                .allowedOrigins("*")
                .allowedMethods("GET", "HEAD", "POST", "PUT", "DELETE", "OPTIONS")
                .allowCredentials(true)
                .maxAge(3600)
                .allowedHeaders("*");
    }
}

修改后：

@Configuration
public class CorsConfig implements WebMvcConfigurer {
    @Override
    public void addCorsMappings(CorsRegistry registry) {
        // 设置允许跨域的路由
        registry.addMapping("/**")
                // 设置允许跨域请求的域名
                .allowedOriginPatterns("*")
                // 是否允许证书（cookies）
                .allowCredentials(true)
                // 设置允许的方法
                .allowedMethods("*")
                // 跨域允许时间
                .maxAge(3600);
    }
}