代码改变世界

随笔分类 -  Java

JSP 登录与注册的小案例

2016-12-24 17:31 by 甘雨路, 1391 阅读, 收藏,
摘要: Register com.zr.homework.servlet.Register LoginServlet com.zr.homework.servlet.LoginServlet Register /Register LoginServlet /LoginServle... 阅读全文

Java jdbc 连接oracle之三(封装工具类)

2016-12-20 09:20 by 甘雨路, 2204 阅读, 收藏,
摘要: driver = oracle.jdbc.driver.OracleDriver url = jdbc:oracle:thin:@192.168.10.105:1521:orcl user = LF password = LF package com.lf.testdatabase; import java.io.IOException; import java.io.InputStrea... 阅读全文

Java jdbc 连接oracle之二(使用properties文件)

2016-12-19 16:33 by 甘雨路, 4629 阅读, 收藏,
摘要: driver = oracle.jdbc.driver.OracleDriver url = jdbc:oracle:thin:@192.168.10.105:1521:orcl user = LF password = LF import java.io.InputStream; import java.sql.Connection; import java.sql.Driver; im... 阅读全文

Java jdbc 连接oracle

2016-12-19 15:40 by 甘雨路, 287 阅读, 收藏,
摘要: import java.sql.Connection; import java.sql.Driver; import java.sql.DriverManager; import java.sql.SQLException; import java.util.Properties; import org.junit.Test; public class Demo { @Test ... 阅读全文

Java 生成验证码

2016-12-17 16:10 by 甘雨路, 255 阅读, 收藏,
摘要: package com.lf.testvity; import java.awt.Color; import java.awt.Font; import java.awt.Graphics2D; import java.awt.Robot; import java.awt.image.BufferedImage; import java.io.FileInputStream; import j... 阅读全文

Java 画图

2016-12-14 09:36 by 甘雨路, 633 阅读, 收藏,
摘要: package com.lf.testproxy; import java.awt.Color; import java.awt.Font; import java.awt.Graphics2D; import java.awt.Image; import java.awt.image.BufferedImage; import java.io.File; import java.io.Fil... 阅读全文

Java 集合的基本用法

2016-12-13 19:55 by 甘雨路, 279 阅读, 收藏,
摘要: package jaxpsax; import java.util.Comparator; import java.util.HashSet; import java.util.Iterator; import java.util.Set; import java.util.TreeSet; import org.junit.Test; public class Testf { @... 阅读全文

Map的简单语法

2016-12-13 17:34 by 甘雨路, 1017 阅读, 收藏,
摘要: package jaxpsax; import java.util.Collection; import java.util.HashMap; import java.util.Iterator; import java.util.Map; import java.util.Map.Entry; import java.util.Set; import org.junit.Test; pu... 阅读全文

Java 使用jaxp删除节点

2016-12-12 11:43 by 甘雨路, 194 阅读, 收藏,
摘要: jobs 56 male Alis 32 package jaxp; import javax.xml.parsers.DocumentBuilder; import javax.xml.parsers.DocumentBuilderFactory; ... 阅读全文

Java 使用jaxp修改节点

2016-12-12 11:37 by 甘雨路, 265 阅读, 收藏,
摘要: jobs 56 female Alis 32 package jaxp; import javax.xml.parsers.DocumentBuilder; import javax.xml.parsers.DocumentBuilderFactory; ... 阅读全文

Java 使用jaxp添加节点

2016-12-12 11:24 by 甘雨路, 368 阅读, 收藏,
摘要: jobs 56 Alis 32 package jaxp; import javax.xml.parsers.DocumentBuilder; import javax.xml.parsers.DocumentBuilderFactory; import javax.... 阅读全文

Java jaxp查询节点

2016-12-12 09:17 by 甘雨路, 272 阅读, 收藏,
摘要: jobs 56 Alis 32 package jaxp; import java.io.IOException; import javax.xml.parsers.DocumentBuilder; import javax.xml.parsers.DocumentBuilder... 阅读全文

Java 杨辉三角的简单实现

2016-11-28 17:06 by 甘雨路, 1492 阅读, 收藏,
摘要: package com.lf.trianglenumber; public class Test { public static void main(String[] args) { // 打印的行数 int count = 10; // 创建二维数组 int[][] triangleNum = new int[count... 阅读全文

Java 反射的基本应用

2016-11-24 12:50 by 甘雨路, 200 阅读, 收藏,
摘要: package com.lf.testreflection; import java.lang.reflect.Field; import java.lang.reflect.Method; import org.junit.Test; public class ClassTest{ @Test public void testSomthing()throws E... 阅读全文

Java 多线程

2016-11-23 11:12 by 甘雨路, 142 阅读, 收藏,
摘要: package com.lf.threadhomework; public class TestHomework { public static void main(String[] args) { // 打印奇数的线程 OddNumberThread oddNumberThread = new OddNumberThread(); o... 阅读全文

Java IO 写文件

2016-11-22 11:22 by 甘雨路, 190 阅读, 收藏,
摘要: package com.lf.fileproject; import java.io.File; import java.io.FileOutputStream; import org.junit.Test; public class Test2 { @Test public void test2() { File file = new File("d:/... 阅读全文

Java IO读取文件之二

2016-11-21 16:33 by 甘雨路, 155 阅读, 收藏,
摘要: package com.lf.iopreoject; import java.io.BufferedReader; import java.io.File; import java.io.FileInputStream; import java.io.FileReader; import java.io.InputStreamReader; public class TestCode { ... 阅读全文

Java IO之一读取文件

2016-11-21 16:15 by 甘雨路, 153 阅读, 收藏,
摘要: package com.lf.iopreoject; import java.io.BufferedReader; import java.io.File; import java.io.FileInputStream; import java.io.FileReader; public class TestCode { public static void main(String[... 阅读全文

Java Collections的排序之二

2016-11-18 20:00 by 甘雨路, 173 阅读, 收藏,
摘要: package test.list; import java.util.ArrayList; import java.util.Collections; import java.util.HashSet; import java.util.Iterator; import java.util.LinkedList; import java.util.List; import java.util... 阅读全文

Java- 基本封装

2016-11-18 19:02 by 甘雨路, 263 阅读, 收藏,
摘要: package test.studet_manager; public class Student { static int num = 100; // 编号-->唯一的 private int number = -1; //姓名 private String name = ""; //性别 private String sex = "... 阅读全文