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[JSP/Java] Mandelbrot DL : 0: 曼德勃羅集合從數學上來講，曼德布洛特集合是一個複數的集合。一個給定的複數c或者屬於曼德布洛特集合M，或者不是。-From the Mandelbrot set mathematically speaking, the Mandelbrot set is a collection of complex numbers. A given complex number c or of Mandelbrot set M, or not.
Date : 2025-12-29 Size : 29kb User : kontakt
[JSP/Java] ComplexTest DL : 0: 个人原创代码：编写Java Application程序，定义一个复数(z=x+iy)类Complex，包含：两个属性：实部x和虚部y 默认构造函数 Complex()，设置x=0,y=0 构造函数：Complex(int i,int j) 显示复数的方法：showComp()将其显示为如： 5+8i或5-8i 的形式。求两个复数的和的方法：（参数是两个复数类对象，返回值是复数类对象）public Complex addComp(Complex C1,Complex C2) 求两个复数的差的方法：（参数是两个复数类对象，返回值是复数类对象）public Complex subComp(Complex C1,Complex C2) 求两个复数的乘积的方法：（参数是两个复数类对象，返回值是复数类对象，新复数实部=两复数实部乘积-两复数虚部乘积，新复数虚部=两复数实部与虚部交叉乘积之和，）public Complex multiComp(Complex C1,Complex C2) 比较两个复数是否相等的方法（参数是两个复数类对象，返回值是boolean类型）public boolean equalComp(Complex C1,Complex C2) 在Application中测试该类的方法，实部x和虚部y可由main方法参数提供输入。-Personal original code: using java application procedures, the definition of a complex number (z = x+ iy), Complex, including: Two properties: the real part x and imaginary Ministry y Default constructor Complex, (), set x = 0, y = 0 Constructor: Complex, (int i, int j) The complex method: showComp () to display: 5+8 i or 5-8i form is displayed. Seek two complex methods: (parameter two complex class object, the return value is a complex class object) public Complex addComp (Complex C1, Complex C2) Seek two complex methods: (argument two complex class object, the return value is the plural class object) public Complex subComp (Complex C1, Complex C2) Seeking the product of two complex numbers: (parameters are two complex class object, the return value is a complex class object, new plural = two of the real part of the complex product of the real part- two complex product of the imaginary part of the new complex imaginary part = two complex real and imaginary parts of the cros
Date : 2025-12-29 Size : 1kb User : 李瑞
[JSP/Java] 15hibernate_day01_pm_all DL : 0: Hibernate基本概念 1）Hibernate是什么，有什么作用和好处 Hibernate是一个数据库访问框架，用于实现对数据库的增删改查操作。使用Hibernate框架可以简化数据库访问操作，要程序员将更多的经历放在业务层编写上。原有JDBC操作数据库存在一些问题，主要有以下几个方面 a)需要编写大量复杂的SQL语句 b)需要设置大量的SQL参数或者将ResultSet取值封装成实体对象 c)当数据库移值时，需要修改部分SQL语句和操作使用Hibernate框架可以解决以上问题。 2）Hibernate实现原理设计原理：ORM(Object Relation Mapping)对象关系映射。意思是将程序中的实体对象和关系数据库表中的一行记录进行映射。这样在程序中使用该工具就可以将一个对象写入数据表，或者将数据表记录自动封装成一个对象返回。可以这样理解，利用Hibernate可以将user对象直接更新到数据表中；查询时可以将数据表记录以user对象形式返回。中间的JDBC+SQL操作对程序员来说不用关心，在Hibernate底层封装好了。同类框架还有一些，比如iBATIS,JPA等。-Hibernate basic concepts 1) Hibernate is, what role and benefits Hibernate is a database access framework for the realization of the database CRUD operations. Using Hibernate framework can simplify database access operations, to more experienced programmers will be placed on the preparation of the business layer. Original database JDBC operations there are some problems, mainly in the following aspects a) the need to write a lot of complex SQL statements b) the need to set a large number of SQL parameters or values will be packaged into a solid object ResultSet c) When the database shift values , you need to modify some SQL statements and operations Using Hibernate framework
Date : 2025-12-29 Size : 41kb User : 说法