合并老师代码

students/1241588932/design-patterns-enan/pom.xml

@@ -0,0 +1,54 @@
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>com.coderising</groupId>
+    <artifactId>design-patterns-enan</artifactId>
+    <version>0.0.1-SNAPSHOT</version>
+    <packaging>jar</packaging>
+
+    <name>design-patterns-enan</name>
+    <url>http://maven.apache.org</url>
+
+    <properties>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+    </properties>
+
+    <dependencies>
+
+        <dependency>
+            <groupId>junit</groupId>
+            <artifactId>junit</artifactId>
+            <version>4.12</version>
+        </dependency>
+
+        <dependency>
+            <groupId>org.projectlombok</groupId>
+            <artifactId>lombok</artifactId>
+            <version>1.16.16</version>
+            <optional>true</optional>
+        </dependency>
+
+    </dependencies>
+    <repositories>
+        <repository>
+            <id>aliyunmaven</id>
+            <url>http://maven.aliyun.com/nexus/content/groups/public/</url>
+        </repository>
+    </repositories>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <version>3.3</version>
+                <configuration>
+                    <source>1.8</source>
+                    <target>1.8</target>
+                    <encoding>${project.build.sourceEncoding}</encoding>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+</project>

students/1241588932/design-patterns-enan/src/main/java/first/TagBuilder.java

@@ -0,0 +1,39 @@
+package first;
+
+public class TagBuilder {
+
+    private TagNode tagNode;
+    private TagNode currentTagNode;
+    private TagNode superTagNode;
+
+    public TagBuilder(String tagName) {
+        this.tagNode = new TagNode(tagName);
+        this.currentTagNode = this.tagNode;
+        this.superTagNode = null;
+    }
+
+    public TagBuilder addChild(String childTagName) {
+        this.superTagNode = this.currentTagNode;
+        TagNode tagNode = new TagNode(childTagName);
+        this.currentTagNode.add(tagNode);
+        this.currentTagNode = tagNode;
+        return this;
+    }
+
+    public TagBuilder setAttribute(String key, String value) {
+        this.currentTagNode.setAttribute(key, value);
+        return this;
+    }
+
+    public TagBuilder addSibling(String siblingTagName) {
+        TagNode tagNode = new TagNode(siblingTagName);
+        this.superTagNode.add(tagNode);
+        this.currentTagNode = tagNode;
+        return this;
+    }
+
+    public TagNode build() {
+        return tagNode;
+    }
+
+}

students/1241588932/design-patterns-enan/src/main/java/first/TagBuilderTest.java

@@ -0,0 +1,41 @@
+package first;
+
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+
+import static org.junit.Assert.assertEquals;
+
+public class TagBuilderTest {
+
+	@Before
+	public void setUp() throws Exception {
+	}
+
+	@After
+	public void tearDown() throws Exception {
+	}
+
+	@Test
+	public void testToXML() {
+
+		TagBuilder builder = new TagBuilder("order");
+
+		String xml = builder.addChild("line-items")
+			.addChild("line-item").setAttribute("pid", "P3677").setAttribute("qty", "3")
+			.addSibling("line-item").setAttribute("pid", "P9877").setAttribute("qty", "10")
+			.build()
+			.toXML();
+
+		String expected = "<order>"
+				+ "<line-items>"
+				+ "<line-item pid=\"P3677\" qty=\"3\"/>"
+				+ "<line-item pid=\"P9877\" qty=\"10\"/>"
+				+ "</line-items>"
+				+ "</order>";
+
+		System.out.println(xml);
+		assertEquals(expected, xml);
+	}
+
+}

students/1241588932/design-patterns-enan/src/main/java/first/TagNode.java

@@ -0,0 +1,83 @@
+package first;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class TagNode {
+	private String tagName;	
+	private String tagValue;
+	private List<TagNode> children = new ArrayList<>();	
+	private List<Attribute> attributes = new ArrayList<>();
+
+	public TagNode(String name){
+		this.tagName = name;
+	}
+	public void add(TagNode child){
+		this.children.add(child);
+	}
+	public void setAttribute(String name, String value) {
+		Attribute attr = findAttribute(name);
+		if(attr != null){
+			attr.value = value;
+			return;
+		}
+
+		attributes.add(new Attribute(name,value));
+	}
+	private Attribute findAttribute(String name){
+		for(Attribute attr : attributes){
+			if(attr.name.equals(name)){
+				return attr;
+			}
+		}
+		return null;
+	}
+	public void setValue(String value) {
+		this.tagValue = value;
+
+	}
+	public String getTagName() {
+		return tagName;
+	}
+	public List<TagNode> getChildren() {
+		return children;
+	}
+
+	private static class Attribute{
+		public Attribute(String name, String value) {
+			this.name = name;
+			this.value = value;
+		}
+		String name;
+		String value;
+
+	}
+	public String toXML(){
+		return toXML(this);
+	}
+	private String toXML(TagNode node){
+		StringBuilder buffer = new StringBuilder();
+		buffer.append("<").append(node.tagName);
+		if(node.attributes.size()> 0){
+			for(int i=0;i<node.attributes.size();i++){
+				Attribute attr = node.attributes.get(i);
+				buffer.append(" ").append(toXML(attr));				
+			}
+		}
+		if(node.children.size()== 0){
+			buffer.append("/>");
+			return buffer.toString();
+		}
+		buffer.append(">");		
+		for(TagNode childNode : node.children){
+			buffer.append(toXML(childNode));
+		}
+		buffer.append("</").append(node.tagName).append(">");
+
+
+		return buffer.toString();
+	}
+	private String toXML(Attribute attr){
+		return attr.name+"=\""+attr.value + "\"";
+	}
+}

students/250103158/data-structure/answer/pom.xml

@@ -0,0 +1,32 @@
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+
+  <groupId>com.coderising</groupId>
+  <artifactId>ds-answer</artifactId>
+  <version>0.0.1-SNAPSHOT</version>
+  <packaging>jar</packaging>
+
+  <name>ds-answer</name>
+  <url>http://maven.apache.org</url>
+
+  <properties>
+    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+  </properties>
+
+  <dependencies>
+
+    <dependency>
+    	<groupId>junit</groupId>
+    	<artifactId>junit</artifactId>
+    	<version>4.12</version>
+    </dependency>
+
+  </dependencies>
+  <repositories>
+        <repository>
+            <id>aliyunmaven</id>
+            <url>http://maven.aliyun.com/nexus/content/groups/public/</url>
+        </repository>
+    </repositories>
+</project>

students/250103158/data-structure/answer/src/main/java/com/coderising/download/DownloadThread.java

@@ -0,0 +1,20 @@
+package com.coderising.download;
+
+import com.coderising.download.api.Connection;
+
+public class DownloadThread extends Thread{
+
+	Connection conn;
+	int startPos;
+	int endPos;
+
+	public DownloadThread( Connection conn, int startPos, int endPos){
+
+		this.conn = conn;		
+		this.startPos = startPos;
+		this.endPos = endPos;
+	}
+	public void run(){	
+
+	}
+}

students/250103158/data-structure/answer/src/main/java/com/coderising/download/FileDownloader.java

@@ -0,0 +1,73 @@
+package com.coderising.download;
+
+import com.coderising.download.api.Connection;
+import com.coderising.download.api.ConnectionException;
+import com.coderising.download.api.ConnectionManager;
+import com.coderising.download.api.DownloadListener;
+
+
+public class FileDownloader {
+
+	String url;
+
+	DownloadListener listener;
+
+	ConnectionManager cm;
+
+
+	public FileDownloader(String _url) {
+		this.url = _url;
+
+	}
+
+	public void execute(){
+		// 在这里实现你的代码， 注意： 需要用多线程实现下载
+		// 这个类依赖于其他几个接口, 你需要写这几个接口的实现代码
+		// (1) ConnectionManager , 可以打开一个连接，通过Connection可以读取其中的一段（用startPos, endPos来指定）
+		// (2) DownloadListener, 由于是多线程下载， 调用这个类的客户端不知道什么时候结束，所以你需要实现当所有
+		//     线程都执行完以后， 调用listener的notifiedFinished方法， 这样客户端就能收到通知。
+		// 具体的实现思路：
+		// 1. 需要调用ConnectionManager的open方法打开连接， 然后通过Connection.getContentLength方法获得文件的长度
+		// 2. 至少启动3个线程下载，  注意每个线程需要先调用ConnectionManager的open方法
+		// 然后调用read方法， read方法中有读取文件的开始位置和结束位置的参数， 返回值是byte[]数组
+		// 3. 把byte数组写入到文件中
+		// 4. 所有的线程都下载完成以后， 需要调用listener的notifiedFinished方法
+
+		// 下面的代码是示例代码， 也就是说只有一个线程， 你需要改造成多线程的。
+		Connection conn = null;
+		try {
+
+			conn = cm.open(this.url);
+
+			int length = conn.getContentLength();	
+
+			new DownloadThread(conn,0,length-1).start();
+
+		} catch (ConnectionException e) {			
+			e.printStackTrace();
+		}finally{
+			if(conn != null){
+				conn.close();
+			}
+		}
+
+
+
+
+	}
+
+	public void setListener(DownloadListener listener) {
+		this.listener = listener;
+	}
+
+
+
+	public void setConnectionManager(ConnectionManager ucm){
+		this.cm = ucm;
+	}
+
+	public DownloadListener getListener(){
+		return this.listener;
+	}
+
+}