1、package fileAndStringOperate;import java.io.BufferedReader;import java.io.File;import java.io.FileOutputStream;import java.io.FileReader;import java.io.FileWriter;import java.io.IOException;import java.io.OutputStream;public class ReadFileToString public static void main(String args) throws IOExcept
2、ionString fileData = readtxt(“D:IR1JAVA 网络爬虫.txt“);CountRelatedDocument(fileData);/MyWebRec myWebRec = new MyWebRec2000;ClassifyURL(fileData);private static String readtxt(String filePath) throws IOExceptionBufferedReader br=new BufferedReader(new FileReader(filePath);String str=“;String r=br.readLi
3、ne();while(r!=null)str+=r+“n“;r=br.readLine();return str;private static char readtxtToChar(String filePath) throws IOExceptionchar data = null;int currentline = 0;BufferedReader br=new BufferedReader(new FileReader(filePath);String str=“;String r=br.readLine();while(r!=null)str+=r+“n“;datacurrentlin
4、e+ = str.toCharArray();r=br.readLine();return data;private static int CountRelatedDocument(String fileData)int cntRelated = 0;int currentLine = 1;int baiduCnt = 0;int bingCnt = 0;int sogouCnt = 0;int _360Cnt = 0;int State = 0;boolean baiduY = new boolean51;boolean bingY = new boolean51;boolean sogou
5、Y = new boolean51;boolean _360Y = new boolean51;char fileChar = fileData.toCharArray();for(int i = 0; i fileChar.length;i +)if(fileChari = # System.out.println(“分点：“+currentLine);if(fileChari = n)currentLine +;if(currentLine %3 = 0)if(fileChari = Y|fileChari = y)if(State = 1)baiduCnt +;baiduYcurrent
6、Line/3 = true;else if(State = 2)bingCnt +;bingYcurrentLine/3 - 50 = true;/System.out.println(currentLine/3 - 50);else if(State = 3)sogouCnt +;sogouYcurrentLine/3 - 100 =true;else if(State = 4)_360Cnt +;_360YcurrentLine/3 - 150 = true;cntRelated+;tryCaculatePR(baiduY,bingY,_360Y,sogouY,cntRelated);ca
7、tch(Exception e)e.getMessage();System.out.println(“cntRelated = “+cntRelated);System.out.println(“baiduCnt = “+baiduCnt);System.out.println(“bingCnt = “+bingCnt);System.out.println(“sohuCnt = “+sogouCnt);System.out.println(“_360Cnt = “+_360Cnt);System.out.println(“currentLine = “ + currentLine);retu
8、rn cntRelated;private static void ClassifyURL(String fileData)String str1 = fileData.split(“n“);for(int i = 0;i str1.length;i +)if(str1i.startsWith(“#*“)str1i = str1i.substring(10);private static void CaculatePR(boolean baiduY,boolean bingY,boolean _360Y,boolean sogouY,int cntRelated) throws IOExcep
9、tiondouble baiduP = new double 51;double baiduR = new double 51;double bingP = new double 51;double bingR = new double 51;double sogouP = new double 51;double sogouR = new double 51;double _360P = new double 51;double _360R = new double 51;int cntBaidu = 0;int cntBing = 0;int cntSogou = 0;int cnt360
10、 = 0;/System.out.println(“Related:“+cntRelated);for(int i = 1;i = 50;i +)if(baiduYi = true)cntBaidu +;if(bingYi = true)cntBing +;if(sogouYi = true)cntSogou +;if(_360Yi = true)cnt360 +;baiduPi = 1.000000*cntBaidu/i;baiduRi = 1.000000*cntBaidu/cntRelated;bingPi = 1.000000*cntBing/i;bingRi = 1.000000*c
11、ntBing/cntRelated;sogouPi = 1.000000*cntSogou/i;sogouRi = 1.000000*cntSogou/cntRelated;_360Pi = 1.000000*cnt360/i;_360Ri = 1.000000*cnt360/cntRelated;/System.out.print(cntBaidu+“t“+cntBing+“t“+cntSogou+“t“+cnt360+“n“);CaculateMAP(baiduP,bingP,sogouP, _360P);File file = new File(“D:/JAVA 网络爬虫.txt“);F
12、ileWriter out = new FileWriter(file); /文件写入流/将数组中的数据写入到文件中。每行各数据之间 TAB 间隔for(int i=1;i=50;i+)out.write(“baidu“+“t“+baiduPi+“t“ + baiduRi+“rn“); for(int i=1;i=50;i+)out.write(“bing“+“t“+bingPi+“t“ + bingRi+“rn“); for(int i=1;i=50;i+)out.write(“sogou“+“t“+sogouPi+“t“ + sogouRi+“rn“); for(int i=1;i=50;
13、i+)out.write(“360“+“t“+_360Pi+“t“ + _360Ri+“rn“); out.close();private static void CaculateMAP(double baiduP,double bingP,double sogouP,double _360P)double baiduPre=0,bingPre=0,sogouPre=0,_360Pre=0;for(int i = 1;i = 50;i + )baiduPre += baiduPi;bingPre += bingPi;sogouPre += sogouPi;_360Pre += _360Pi;baiduPre /= 50;bingPre /= 50;sogouPre /= 50;_360Pre /= 50;System.out.println(“baidu:“+baiduPre+“bing:“+bingPre+“sogou:“+sogouPre+“360:“+_360Pre);
