这个项目由jbuilder移到eclipse上的，jb下是顺利运行的。但现在出现了问题。 out.println(user1.getUser_info());//这可以取到值！ 那么为 ...

The most significant addition to the Java language since Sun Microsystems rewrote the collections API for Java 5 is the introduction of Java records. Java records address two significant pain points ...