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原创 Java delete if exists

【代码】Java delete if exists。

原创 Java delete file

【代码】Java delete file。

原创 Java move files

【代码】Java move files。

原创 java file copy

package sample;import java.nio.file.Files;import java.nio.file.Path;import java.nio.file.Paths;public class CopyExample1 {public static void main(String[] args) throws Exception {Path source = Paths.get("foo/bar/note.txt");Path target = Paths.get("temp/bar

原创 Java create file

package sample;import java.nio.file.Files;import java.nio.file.Path;import java.nio.file.Paths;public class PathExample3 {public static void main(String[] args) throws Exception {Path path = Paths.get("temp/bar/note.txt");Files.createFile(path);}}

原创 Java Directory

Files;try {;

原创 Interface Path

package sample;import java.nio.file.Path;import java.nio.file.Paths;public class PathExample1 {public static void main(String[] args) {Path p = Paths.get("C:/work/docs/note.txt");System.out.println(p);System.out.println(p.getRoot());System.out.println(p.ge

原创 DAO Java

try {return con;try {\n" + e);if (smt!= null) {try {if (con!= null) {try {try {\n" + e);if (smt!= null) {try {if (con!= null) {try {try {

原创 Spring Boot Architecture

原创 DAO(Data Access Object)

1.add.ctp2.index.ctp3.controller

原创 Entity

Enity<---------------->1 line in table

原创 Object Relational Mapping(ORM)

原创 Spring Starter Project

/DependencyInjectionSample/src/main/java/com/example/demo/chapter03/used/Greet.java/DependencyInjectionSample/src/main/java/com/example/demo/chapter03/used/MorningGreet.java/DependencyInjectionSample/src/main/java/com/example/demo/chapter03/used/EveningGre

原创 Dependency Injection

sprintf—Return a formatted stringsprintf(string$format,mixed...$values) :string|false

原创 Javadoc自动生成

Alt+Shift+j

原创 Sping MVC Model

4.

原创 Javadoc comment自动生成

按下Alt + Shift + j。

原创 DAO(Data Access Object)

(Servlet)CompileTomcatCompile。

原创 JavaBeans

①②③ complie④ Tomcat⑤。

原创 netstat -nao | find “8080“

Tomcat port

原创 Web Application Folder

C:\work\tomcat\webapps\book

原创 Servlet修改后可以不用重启Tomcat

Before1.Servlet (Hello.java)编译编译javac -encoding utf-8 -d ..\classes -sourcepath . chapter3\Hello.java生成Hello.class2.启动Tomcat3.运行http://localhost:8080/book/chapter3/helloServlet修改后可以不用重启Tomcat 的方法演示如下1.编写文件context.htmlC:...

原创 Servlet编译

1.编译Servlet文件Hello.javajavac -encoding utf-8 -d ..\classes -sourcepath . chapter3\Hello.java生成Hello.class2.启动tomcat3.运行http://localhost:8080/book/chapter3/hello

原创 javax.servlet不存在

1.编译Servlet (Hello.java)的时候，提示 javax.servlet不存在2.原因Classpath的设置有问题3.调查开始-输入cmd，输入下面代码echo %classpath%.;C:\Program Files\Java\jdk1.8.0_171\lib\tools.jar;C:\Program Files\Java\jdk1.8.0_171\lib\dt.jarC:\work\tomcat\lib\servlet-api.jar4.改..

原创 Java throw throws

1.throwfunction内部throwsfunction外部2.throw 后面只能一次抛出一个异常throws可以一次抛出若干异常，异常之间用逗号分开

原创 margin 0 auto

居中margin : 0 automargin-top:0;margin-right:auto;margin-bottom:0;margin-left:auto;

原创 Android 网站页面内容控制在手机屏幕内

<meta name="viewport" content="width=640px, user-scalable=no, target-densitydpi=device-dpi">

原创 PHP json_encode()

private $data =[......];echo json_encode($this->data[$id]);

原创 this-＞Html

$this->Html->scriptStart(array('inline' => false));$this->Html->scriptEnd();$this->Html->css(filename [, ] );echo $this->Html->css('forms');<link rel="stylesheet" href="/css/forms.css" />

原创 CakePHP find()

$this->model name->find('all',array('fields' => array('id','last_name','first_name'),'conditions' => array('Model.id' => 10),'order' => array('id' => 'asc'),'limit' =&gt...

原创 PHP strpos

strpos(string$haystack,mixed$needle[,int$offset= 0] ) :int

原创 PHP array_key_exists()

array_key_exists(mixed$key,array$array) :boolChecks if the given key or index exists in the array

原创 CakePHP 3.9.3 autoRender

public $autoRender = false; Controller $autoRender = false action 　　　　　　　　　　　　　　　　　　　　　　　　　　　↓ Web browser

原创 PHP sprintf()

sprintf(string$format,mixed...$values) :string|false%02dE%02 包含0在内2位dintegerEscientific notation

原创 CakePHP array

$name = array('Tom', 'Lili', 'Kate');print $name[0];print $name[1];print $name[2];$name = array('Tom' =>'CN', 'Lili' =>US, 'Kate' =>JP);print $name['Tom'];print $name['Lili'];print $name['Kate'];

原创 CakePHP foreach

foreach( $arrayname as $key =>$value){print $key;print $value;print '<br />';}

原创 CakePHP HTML helper link method

$this->Html->link('title', ['controller' => 'controllername ', 'action' => 'action name','parameter']);

原创 Html Placeholder

index.html<!DOCTYPE html><html><body><h1>placeholder</h1><form action="/test.html"> <label for="phone">Enter a phone number:</label><br><br> <input type="tel" id="phone" name="pho..

原创 notepad++ 代码带颜色

Settings----StyleConfiguratorSelect theme:BespinLanguage----P----PHP

原创 页面浮动按钮固定在右下角

footer.php<div style="z-index: 9999; position: fixed ! important; right: 0px; bottom: 0px;"><table width="100%" style="position: absolute; right: 0px; bottom: 0px;"><tr><td><ul> <li><a href="https://xxxxx...