Exercise4

　　1、Struts2框架下ActionSupport的使用（附加） 在Myeclipse中新建web项目lab4plus； 在实验四的基础上修改LoginAction，使之继承ActionSupport，并重写Validate方法，在其中增加FieldError、ActionError和ActionMessage； 修改login.jsp、loginSuccess.jsp和loginFail.jsp页面，用<s:actionmessage>和<s:actionerror>标签输出信息； 将lab4plus布署在Tomcat服务器上； 运行login.jsp页面，并记录运行结果、主要处理流程与关键代码。(, Struts2 framework ActionSupport use (additional) Create a new web project in Myeclipse lab4plus In the experiment on the basis of four modified LoginAction, so inheritance ActionSupport, and override the Validate method, in which the increase FieldError, ActionError and ActionMessage Modify login.jsp, loginSuccess.jsp and loginFail.jsp page with <s:actionmessage> and <s:actionerror> tag output information The lab4plus deployed on Tomcat server Run login.jsp page and record the results, the main processes and key code. )

采用java编写的Median filter程序()

用JAVA实现一般背包问题（附院码）比较实用(Knapsack problem)

编写HibernateUtil工具类，用工厂方法设计模式实现(Write HibernateUtil tools with factory method design pattern)

分段直线拟合，将一组点 分段拟合计算出最小权值和画出线条(Piecewise linear fitting, fitting a set of points to calculate the minimum weight sub-values ​ ​ and draw lines )

实现一个数据单元，包括学号和姓名两部分。 编写两个线程，一个线程往数据单元中写，另一个线程往出读。要求每写一次就往出读一次。

Full documentation for Java Card 2.1.1 API for Smart Card development.

代码简洁之道，主要对代码编写的规范型，命名的合理性进行讲解(Code concise way, mainly code preparation of the standard type, the rationality of naming on)

An output stream for the body of an HTTP request Source Code for Java Script.

根据字符串内容识别编码格式 简单实用 用来解决检测编码不统一的问题(Identifies the encoding format based on the string content)