helloword, the extension of Notepad has been changed and cannot be opened.

The extension of Notepad has been changed and it cannot be used. What should I do?

From [Javadiscussion group] 2020-01-28 09:49:26 0  1  1308

java - How to start the SpringBoot project jar package and use https communication protocol?

I want to make a pure back-end Java project, use the springboot framework, and then change the default http pr...

From [Javadiscussion group] 2017-06-12 09:25:44 0  1  1308

java-ee - java开发web现在一般用什么mvc框架？

感觉struts是不是有些复杂了， 一般选择的是什么方式

From [Javadiscussion group] 2017-04-17 11:07:48 0  21  1308

java - Spring boot 配置spring.jackson.serialization-inclusion无效

在学习spring boot时配置Jackson遇到一个配置spring.jackson.serialization-inclusion无效，配置在一起的date-format是有效的，查了一大圈资料，感觉应该可以才对！...

From [Javadiscussion group] 2017-04-18 10:47:33 0  1  1306

java - Spring boot mybatis custom converter problem

When spring boot is integrated with mybatis, the custom typehandler (converter) is not called. First, the tabl...

From [Javadiscussion group] 2017-06-14 10:54:51 0  1  1304

Why can't I see it?

Why can't I see it?

From [Javadiscussion group] 2018-03-29 15:54:00 0  1  1303

java - SpringBoot can run in Eclipse, but there will be a logback exception when deployed on Tomcat8.

To develop a new project, I used Springboot as the framework. During the development of the project, I have be...

From [Javadiscussion group] 2017-05-27 17:40:13 0  3  1300

java - mybatis参数格式化异常:NumberFormatException: For input string:"xx"

使用mybatis注解开发的时候，总会遇到很多问题，但是mybatis的注解并不是那么的美好，一些问题或者错误根本不能给出准确的定位，有时候，甚至会给出Unknow Source的错误，获取就是一个关闭标签没有关上。此类...

From [Javadiscussion group] 2017-04-18 09:48:57 0  2  1300

java - 如何使用 IntelliJ 运行参数带 重定向符号 的程序？

这个问题的核心是 重定向符号 < 在命令行中，我可以这样执行程序： java -cp /classpath MyClass < data.txt 即编译 MyClass.class 字节码文件...

From [Javadiscussion group] 2017-04-18 09:57:25 0  1  1297

java - 为什么jdk1.5 以后就可以不用配置classpath环境变量？

本人初学者，最近在看Java疯狂讲义时里面说jdk1.5以后就不用配置classpath环境变量，配了有时反而会出现错误？这是为什么 ？

From [Javadiscussion group] 2017-04-18 09:40:37 0  4  1293

java - myeclipse导入项目的时候提示project upgrade,是什么意思

myeclipse导入项目的时候提示project upgrade,是什么意思

From [Javadiscussion group] 2017-04-17 17:02:36 0  1  1292

java - I have configured a data source, why is it prompted that there is more than one bean of "DataSource" type?

I seem to have configured only one data source. Why is it prompted that there are multiple data sources when i...

From [Javadiscussion group] 2017-06-28 09:25:25 0  1  1290

java的web项目是否可以与扫描枪交互

想问下，一个b/s的java项目。需要扫码，获取数据，能实现吗？需要什么方法实现。

From [Javadiscussion group] 2017-04-18 09:17:49 0  8  1289

jvm - Are Java new objects atomic?

{Code...} I would like to ask, there is complex object initialization logic in the xxx() method. Is the object...

From [Javadiscussion group] 2017-06-23 09:14:17 0  4  1287

java - Manual close is not allowed over a Spring managed SqlSession

idea junit运行报错：java.lang.UnsupportedOperationException: Manual close is not allowed over a Spring managed SqlS...

From [Javadiscussion group] 2017-04-17 17:52:37 0  1  1287