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转载 eclipse 国内下载镜像地址

eclipse 的服务器在国外，下载时会较慢，可用国内镜像地址http://mirrors.ustc.edu.cn/eclipse/technology/epp/downloads/release/

2022-01-30 14:02:27 5199

转载 java.lang.OutOfMemoryError: Java heap space 内存溢出

处理方法是设置TOMCAT的内存大小Eclipse下解决办法：Window–>Preference–>JAVA–>Installed JREs -->Edit–>Default VM arguments下填上:-Xms256m -Xmx512m -XX:PermSize=256m -XX:MaxPermSize=600m在这里插入图片描述...

2021-09-06 13:31:55 180

public static int count(String text,String sub){ //字段，符号int count =0, start =0;while((start=text.indexOf(sub,start))>=0){start += sub.length();count ++;}return count;}int comma = count(fengZhuangSpecials ,",");if(comma>0){String[] split =

2021-05-21 13:09:36 221

转载 https://blog.youkuaiyun.com/weixin_35886269/article/details/114870016

https://blog.youkuaiyun.com/weixin_35886269/article/details/114870016

2021-05-18 14:07:01 4252

原创比较两个list内容取出不同

//比较两个list public static List getDiffrent(List list1, List list2){ List diff = new ArrayList(); String temp1 = list1.toString ().replaceAll ("[\[\]]", “,”).replaceAll ("\s+", “”); &nb

2021-04-20 16:10:36 1124

原创解压路径下文件返回list

//解压目标路径下文件 public List unpacktheTXT(String path ){ List resultList = new ArrayList(); StringBuilder result = new StringBuilder(); try { File file = new F

2021-04-20 16:08:20 142

原创对List集合进行排序

升序Collections.sort(kaigongdanList, new Comparator() {@Overridepublic int compare(kaigongdan o1, kaigongdan o2) {if (o1.getStepId() > o2.getStepId()) {return 1;}if (o1.getStepId() == o2.getStepId()) {return 0;}return -1;}});降序Collections.so

2021-04-20 16:06:17 126

原创 java利用C盘自带解压软件进行压缩包解压

public String decompression(String tat ,String zipPathName){//tat 是压缩文件路径，zipPathName 是解压后保存路径Runtime runtime = Runtime.getRuntime();String textName = “”;File testFile = new File(zipPathName);String abnormal = “”;if(!testFile .exists()) {new File(zi

2021-03-10 13:44:19 201

原创爬虫时跳过证书

public class SSLHelper {public static String USER_AGENT = “Mozilla/4.0 (compatible; MSIE 9.0; Windows NT 5.0)”;static public void init() {try {SSLContext context = SSLContext.getInstance(“TLSv1.2”);context.init(null, new X509TrustManager[]{new X509Tru

2021-02-26 09:56:18 299

原创运用Jsoup写java爬虫下载文档

private static Document getDoc(String url) {Document doc = null;int loopCount = 0;while (true) {try {doc = Jsoup.connect(url).timeout(10000000).ignoreContentType(true).get();break;} catch (Exception e) {e.printStackTrace();}if (loopCount++ > 1

2021-02-26 09:48:15 219

转载 JSF 2.0教程

JSF 2.0教程JavaServer Faces（JSF）2.0是一个MVC Web框架，其重点是简化Java Web应用程序的构建用户界面（带有100多个现成的UI标签），并使可重用的UI组件易于实现。与JSF 1.x不同，在JSF 2.0中，几乎所有内容都在faces-config.xml声明，允许您使用批注来声明导航，托管Bean或CDI Bean，这使您的开发更加轻松和快捷。在本教程中，它提供了有关使用JavaServer Faces（JSF）2.0框架的许多分步示例和说明。快乐学习JSF

2020-08-26 14:14:26 726

WS3220243774的博客

原创 java 调用小程序