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操作jdk版本以及tomcat版本：右键项目--buildpath--configure buildpath... project Facets libraries add/选中remove JRE System Libraries/Server Runtime Execution environm 阅读全文
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import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import java.io.ObjectInputStream; import java.io.ObjectOutputStream;... 阅读全文
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import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import java.net.Socket; import java.net.UnknownHostException; public class cli... 阅读全文
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import java.util.ArrayList; import javax.servlet.ServletOutputStream; import org.apache.poi.hssf.usermodel.HSSFCell; import org.apache.poi.hssf.usermodel.HSSFCellStyle; import org.apache.poi.hssf.u... 阅读全文
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package com.zhujie; import java.lang.management.GarbageCollectorMXBean; import org.aopalliance.intercept.Invocation; import org.aspectj.lang.JoinPoint 阅读全文
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import java.util.LinkedHashMap; import java.util.Map; public class LRUCache extends LinkedHashMap { private static final int MAX_CACHE_SIZE = 100; private int limit; public LRUCache() ... 阅读全文
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import java.io.IOException; import java.net.http.WebSocket; import java.util.concurrent.CopyOnWriteArraySet; import javax.websocket.OnClose; import javax.websocket.OnMessage; import javax.websocket.... 阅读全文
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package com.xml; import java.io.File; import java.io.FileOutputStream; import java.io.IOException; import java.util.Iterator; import java.util.List; import org.dom4j.Attribute; import org.dom4j.Doc... 阅读全文
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package com.xml; import java.io.File; import java.io.IOException; import javax.xml.crypto.dsig.Transform; import javax.xml.parsers.DocumentBuilder; import javax.xml.parsers.DocumentBuilderFactory; ... 阅读全文
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import ch.qos.logback.classic.Logger; import org.apache.commons.net.ftp.*; import org.slf4j.LoggerFactory; import java.io.File; import java.io.FileInputStream; import java.io.IOException; import jav... 阅读全文