| 读取文件/cmd |
java |
|
package common;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import bean.VideoBean;
public class FileHelp {
//读取文件
public static List readFileByLines(File file) {
BufferedReader reader = null;
List<VideoBean> list=new ArrayList();
try {
// System.out.println("以行为单位读取文件内容，一次读一整行：");
reader = new BufferedReader(new FileReader(file));
String tempString = null;
int line = 1;
// 一次读入一行，直到读入null为文件结束
while ((tempString = reader.readLine()) != null) {
// 显示行号
// System.out.println("line " + line + ": " + tempString);
tempString=tempString.trim();
String s[]=tempString.split("[\\s]+");
if(s.length>=2){
VideoBean bean=new VideoBean();
bean.setGcid(s[0]);
bean.setCid(s[1]);
if(s.length>=3){
bean.setFileSize(s[2]);
}
if(s.length>=4){
bean.setTransSpec(s[3]);
}
list.add(bean);
}else if(s.length==1){
VideoBean bean=new VideoBean();
bean.setGcid(s[0]);
list.add(bean);
}
}
reader.close();
} catch (IOException e) {
e.printStackTrace();
} finally {
if (reader != null) {
try {
reader.close();
} catch (IOException e1) {
}
}
}
return list;
}
//输出文件
public static void WriteFileByLines(File file,List list) throws IOException {
PrintWriter pw = new PrintWriter(new FileWriter(file));
for (Iterator i = list.iterator(); i.hasNext();) {
pw.println(i.next());
}
pw.flush();
}
//输出某目录下文件的GCID 等信息
public static void recursion(String root){
File file = new File(root);
File[] subFile = file.listFiles();
for (int i = 0; i < subFile.length; i++) {
if (subFile[i].isDirectory()) {
// System.out.println("目录: " + subFile[i].getName());
recursion(subFile[i].getAbsolutePath());
}else{
System.out.println("文件: " + subFile[i].getName());
getCMD(subFile[i].getAbsolutePath());
}
}
}
public static File getFile(String gcid,String spec){
//在此目录下查找，该GCID的日志
File file = new File("D:/18");
File[] subFile = file.listFiles();
for (int i = 0; i < subFile.length; i++) {
String filename=subFile[i].getName();
if(filename.indexOf(gcid)>0&&filename.indexOf(spec)>0){//找到该日志后
// System.out.println(filename);
BufferedReader reader = null;
try {
// System.out.println("以行为单位读取文件内容，一次读一整行：");
reader = new BufferedReader(new FileReader(subFile[i]));
String tempString = null;
// 一次读入一行，直到读入null为文件结束
while ((tempString = reader.readLine()) != null) {
tempString=tempString.trim();
Pattern p = Pattern.compile("\\[buffer|\\[buffersink|\\[scale\\s@|\\[abuffer|\\[asf|error!|gfsfile open error|log4cplus:ERROR|Invalid data found");
Matcher m = p.matcher(tempString);
if(m.find()){
System.err.println(tempString);
}
}
}catch(Exception e){
System.err.println(e.toString());
}
}
}
return null;
}
//使用CMD获取相关信息
public static void getCMD(String path){
try {
String[] cmd = new String[3];
cmd[0 ] = "cmd";
cmd[1] = "/C";
cmd[2] = "cid "+path;
Process p = Runtime.getRuntime().exec(cmd);
InputStreamReader reader = new InputStreamReader( p.getInputStream() );
BufferedReader br = new BufferedReader(reader);
String rs = null;
while( (rs = br.readLine()) != null){
System.out.println(rs);
}
br.close();
p.destroy();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
//只输出gcid
public static void getFilterCMD(String path){
try {
String[] cmd = new String[3];
cmd[0 ] = "cmd";
cmd[1] = "/C";
cmd[2] = "cid "+path;
Process p = Runtime.getRuntime().exec(cmd);
InputStreamReader reader = new InputStreamReader( p.getInputStream() );
BufferedReader br = new BufferedReader(reader);
String rs = null;
while( (rs = br.readLine()) != null){
if(rs.contains("file gcid: ")){
String rs2[]=rs.split("file gcid: ");
System.out.println(rs2[1]);
}
}
br.close();
p.destroy();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public static void main(String[] args) {
recursion("C:/320");
}
public void recursionFilter(String root) {
File file = new File(root);
File[] subFile = file.listFiles();
for (int i = 0; i < subFile.length; i++) {
if (subFile[i].isDirectory()) {
// System.out.println("目录: " + subFile[i].getName());
recursion(subFile[i].getAbsolutePath());
}else{
System.out.println("文件: " + subFile[i].getName());
getFilterCMD(subFile[i].getAbsolutePath());
}
}
}
//读取文件
public static List readFileByLines2(File file) {
BufferedReader reader = null;
List<VideoBean> list=new ArrayList();
try {
// System.out.println("以行为单位读取文件内容，一次读一整行：");
reader = new BufferedReader(new FileReader(file));
String tempString = null;
int line = 1;
// 一次读入一行，直到读入null为文件结束
while ((tempString = reader.readLine()) != null) {
// 显示行号
// System.out.println("line " + line + ": " + tempString);
tempString=tempString.trim();
String s[]=tempString.split("[\\s]+");
if(s.length==5){
VideoBean bean=new VideoBean();
bean.setGcid(s[0]);
bean.setTransSpec(s[2]);
bean.setCid(s[4]);//失败码
list.add(bean);
}else if(s.length==4){
VideoBean bean=new VideoBean();
bean.setGcid(s[0]);
bean.setTransSpec(s[1]);
bean.setFileSize(s[2]);//succ or fail
bean.setCid(s[3]); // 状态码
list.add(bean);
}
}
reader.close();
} catch (IOException e) {
e.printStackTrace();
} finally {
if (reader != null) {
try {
reader.close();
} catch (IOException e1) {
}
}
}
return list;
}
//读取文件
}
|
| 设计4个线程,其中两个线程每次对j增加1,另外两个线程对j每次减少1.写出程序. |
java |
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/**
* @author WenQiang Wu
* @version Dec 28, 2009
*/
public class ThreadTest {
private int j;
/**
* add method
*/
private synchronized void add() {
j++;
System.out.println(Thread.currentThread().getName() + "->add : " + j);
}
/**
* inc method
*/
private synchronized void inc() {
j--;
System.out.println(Thread.currentThread().getName() + "->inc : " + j);
}
/**
*
* @param args
*/
public static void main(String[] args) {
ThreadTest tt = new ThreadTest();
//inner class instance
Inc inc = tt.new Inc();
Add add = tt.new Add();
//start thread
for (int i = 0; i < 2; i++) {
//start inc thread
Thread thread = new Thread(inc);
thread.start();
//start add thread
thread = new Thread(add);
thread.start();
}
}
/**
*
* @author WenQiang Wu
* @version Dec 28, 2009
*/
class Inc implements Runnable {
/*
* (non-Javadoc)
*
* @see java.lang.Runnable#run()
*/
public void run() {
for (int i = 0; i < 100; i++) {
inc();
}
}
}
/**
*
* @author WenQiang Wu
* @version Dec 28, 2009
*/
class Add implements Runnable {
/* (non-Javadoc)
* @see java.lang.Runnable#run()
*/
public void run() {
for (int i = 0; i < 100; i++) {
add();
}
}
}
}
|
| 假如有字符串“6sabcsssfsfs33”，用最有快速的方法去掉字符“ab3”，不能用java内置字符串方法（indeOf,substring)等? |
java |
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import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
* @author WenQiang Wu
* @version Dec 29, 2009
*/
public class ReplaceString {
/**
* use array method
*
* @param s
* @param match
*/
static void replace(String s, String match) {
char[] strs = s.toCharArray();
char[] matchs = match.toCharArray();
StringBuilder sb = new StringBuilder();
for (char c : strs) {
int index = -1;
for (char m : matchs) {
index++;
if (c == m) {
break;
} else if (index >= matchs.length - 1) {
sb.append(c);
}
}
}
System.out.println(sb.toString());
}
/**
* use regex method
*
* @param s
* @param p
*/
static void replace(String s, Pattern p) {
Matcher m = p.matcher(s);
StringBuilder sb = new StringBuilder();
while (m.find()) {
sb.append(m.group());
}
System.out.println(sb.toString());
}
/**
*
* @param args
*/
public static void main(String[] args) {
String s = "6sabcsssfsfs33";
String match = "ab3";
// method one
replace(s, match);
String regx = "[^a|b|3]";
Pattern p = Pattern.compile(regx);
// method two
replace(s, p);
}
}
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