neversayno_yl的博客

HTTP Status 500 - Could not write content: No serializer found for class org.hibernate.proxy.pojo.javassist.JavassistLazyInitializer and no properties discovered to create BeanSerializer (to avoid exc...

HTTP Status 500 - Could not write content: could not initialize proxy - no Session 原因：EntityManager提前关闭了 解决方案：在web.xml中配置Spring的过滤器 <!--解决no-session的问题--> <filter> <filter-...

1.通过单例实现提供jdbc的连接和流关闭 package cn.itsource.util; import java.sql.Connection; import java.sql.DriverManager; import java.sql.PreparedStatement; import java.sql.ResultSet; import java.sql.SQLException...

xml文件内容: <?xml version="1.0" encoding="UTF-8"?> <class> <student> <name>李明</name> <age>25</age> </student> <student> <n...

mysql8.0.15的jre下载地址:https://dev.mysql.com/downloads/file/?id=484819 package cn.itsorce.jdbc; import java.sql.Connection; import java.sql.DriverManager; import java.sql.ResultSet; import java.sql.SQ...

package cn.itsource.utils; import java.io.File; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.util.UUID; import javax.servlet.http.HttpServlet...

package cn.itsource; import java.io.IOException; import java.sql.Connection; import java.sql.PreparedStatement; import java.sql.ResultSet; import java.sql.ResultSetMetaData; import java.sql.SQLExcep...