zhanghuanhao / librarysystem Goto Github PK

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基于SSM的图书馆管理系统。主要功能包括：图书查询、图书管理、图书编辑、读者管理、图书的借阅与归还以及借还日志记录等。

Java 96.40% JavaScript 3.60%

librarysystem's Issues

thank's you share this project,i login the system,but it aways don't response

项目bug

博主你好，目前的这个项目存在很多BUG，页面跳转路径问题，以及一些页面不全问题。麻烦你更新完整的项目代码上到仓库看看可以吗？

New bugs found in Book and Lend java class

I’ve identified a malicious code vulnerability that may expose internal representation by incorporating reference to a mutable object in the Lend.java and Book.java

Jetty启动报错

打开页面会显示这个报错

HTTP ERROR 500
Problem accessing /. Reason:

    PWC6033: Unable to compile class for JSP

PWC6199: Generated servlet error:
The type java.lang.String cannot be resolved. It is indirectly referenced from required .class files

PWC6199: Generated servlet error:
java.util.Vector cannot be resolved to a type

PWC6199: Generated servlet error:
_jspx_dependants cannot be resolved

Caused by:
org.apache.jasper.JasperException: PWC6033: Unable to compile class for JSP

PWC6199: Generated servlet error:
The type java.lang.String cannot be resolved. It is indirectly referenced from required .class files

PWC6199: Generated servlet error:
java.util.Vector cannot be resolved to a type

PWC6199: Generated servlet error:
_jspx_dependants cannot be resolved


	at org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:123)
	at org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:296)
	at org.apache.jasper.compiler.Compiler.generateClass(Compiler.java:376)
	at org.apache.jasper.compiler.Compiler.compile(Compiler.java:437)
	at org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:608)
	at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:360)
	at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:486)
	at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:380)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
	at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511)
	at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:390)
	at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
	at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
	at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
	at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:440)
	at org.mortbay.jetty.servlet.Dispatcher.forward(Dispatcher.java:327)
	at org.mortbay.jetty.servlet.Dispatcher.forward(Dispatcher.java:126)
	at org.springframework.web.servlet.view.InternalResourceView.renderMergedOutputModel(InternalResourceView.java:168)
	at org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:303)
	at org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1244)
	at org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:1027)
	at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:971)
	at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:893)
	at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970)
	at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:861)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:707)
	at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
	at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511)
	at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:390)
	at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
	at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
	at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
	at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:440)
	at org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:230)
	at org.mortbay.jetty.handler.HandlerCollection.handle(HandlerCollection.java:114)
	at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
	at org.mortbay.jetty.Server.handle(Server.java:326)
	at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)
	at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:926)
	at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:549)
	at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212)
	at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
	at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:410)
	at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582)
Powered by Jetty://

jetty:run以后就显示Directory: /和三个目录,点击目录都显示not found,该怎么访问页面?

提两个建议

1、请说明一下如果登录时连接数据库失败，可能是因为 JDBC 和本地 MySQL 版本冲突，可以在 pom.xml 第 18 行 <mysql.version>5.1.29</mysql.version> 修改成本地的 MySQL 版本。

2、数据库表设计可以把 admin 和 reader_card 合并，增加一个字段 is_admin 。

搜索图书失败的解决办法

搜索图书失败是因为乱码问题，通过调试会发现从浏览器接受的书名字符串其实是乱码的，然后在web.xml里加上这么一段乱码过滤器就可以了。

<!--乱码过滤器-->
<filter>
    <filter-name>encodingFilter</filter-name>
    <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
    <init-param>
        <param-name>encoding</param-name>
        <param-value>utf-8</param-value>
    </init-param>
</filter>
<filter-mapping>
    <filter-name>encodingFilter</filter-name>
    <url-pattern>/*</url-pattern>
</filter-mapping>

常见问题总结，欢迎补充

由于工作原因，本人将不再对此代码进行维护，如果有好的功能或者想法可以在提出后发布pr，我会在检查功能完整性后决定是否合并。

为什么图书添加和修改功能不可以，然后就是添加读者也不行会报错

HTTP状态 500 - 内部服务器错误
类型异常报告

消息 Request processing failed; nested exception is java.lang.NullPointerException

描述服务器遇到一个意外的情况，阻止它完成请求。

例外情况

org.springframework.web.util.NestedServletException: Request processing failed; nested exception is java.lang.NullPointerException
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:982)
org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:872)
javax.servlet.http.HttpServlet.service(HttpServlet.java:514)
org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)
javax.servlet.http.HttpServlet.service(HttpServlet.java:582)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:85)
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
根本原因。

java.lang.NullPointerException
com.library.dao.ReaderInfoDao.addReaderInfo(ReaderInfoDao.java:41)
com.library.service.ReaderInfoService.addReaderInfo(ReaderInfoService.java:36)
com.library.controller.ReaderController.readerInfoAddDo(ReaderController.java:106)
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
java.lang.reflect.Method.invoke(Method.java:498)
org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:221)
org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:137)
org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:110)
org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:806)
org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:729)
org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)
org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:959)
org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:893)
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970)
org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:872)
javax.servlet.http.HttpServlet.service(HttpServlet.java:514)
org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)
javax.servlet.http.HttpServlet.service(HttpServlet.java:582)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:85)
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
):注意主要问题的全部 stack 信息可以在 server logs 里查看

Apache Tomcat/8.5.87

zhanghuanhao / librarysystem Goto Github PK

librarysystem's Issues

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