报错：org.hibernate.loader.MultipleBagFetchException: cannot simultaneously fetch multiple bags出错原因：当(fetch = FetchType.EAGER)多余一个时，持久框架抓取一方的对象时，同时又将多方的对象加载进容器中，多方又可能关联其它对象，Hibernate实现的JPA，默认最高抓取深度含本身级为四

ireport编译时报以下错误：The method decodeBase64(byte[]) in the type Base64 is not applicable for the arguments (String) value = net.sf.jasperreports.engine.util.JRImageLoader.loadImage(org.apache.commons.co..

Angular 启动项目时报以下错误：Could not find module "@angular-devkit/build-angular" from "D:\\xxx".解决方法，运行以下命令：npm i --save-dev @angular-devkit/build-angular    ...