java将控制台输出日志写入到指定文件中
/**
* 控制台日志写入文件
* @author Mr peng
*
*/
@Component
public class ConsoleLogWrite extends OutputStream{
//window输出文件路径
@Value("${}")
private String consoleLogWriteWindowsUrl;
//linux输出文件路径
@Value("${}")
private String consoleLogWriteLinuxUrl;
private OutputStream oldOutputStream, newOutputStream;
public ConsoleLogWrite() {
}
public ConsoleLogWrite(OutputStream oldOutputStream, OutputStream newOutputStream) {
this.oldOutputStream = oldOutputStream;
this.newOutputStream = newOutputStream;
}
//重写输出流的方式，改为两种，一种控制台输出，一种写入指定文件
@Override
public void write(int b) throws IOException {
oldOutputStream.write(b);
newOutputStream.write(b);
}
//当前bean初始化前调用
@PostConstruct
public void writeLogToFile() throws Exception {
File tmplLogFile = new File(getUploadPath(consoleLogWriteLinuxUrl, consoleLogWriteWindowsUrl));
//启一个定时线程延迟15分钟后每过30分钟检查文件大小是否超过100M，如果超过则删除重新创建
ScheduledExecutorService executorService = Executors.newScheduledThreadPool(1);
executorService.scheduleWithFixedDelay(new Runnable() {
@Override
public void run() {
try {
//文件不存在就创建
if (!tmplLogFile.exists()) {
try {
tmplLogFile.createNewFile();
} catch (IOException e) {
e.printStackTrace();
}
}
//文件大于100M就删除，重新创建
double KB = 1024 * 1024;
double MB = KB * 1024;
if(tmplLogFile.length() > MB * 100){
tmplLogFile.delete();
}
}catch (Exception e) {
e.printStackTrace();
}
}
}, 15, 30, TimeUnit.MINUTES);
//设置输出模式
PrintStream oldOutputStream = System.out;
OutputStream newOutputStream = new FileOutputStream(tmplLogFile);
ConsoleLogWrite multiOutputStream = new ConsoleLogWrite(oldOutputStream, new PrintStream(newOutputStream));
System.setOut(new PrintStream(multiOutputStream));
System.setErr(new PrintStream(multiOutputStream));
}
/**
* 根据当前系统返回对应的路径
* @param linuxPath
* @param windowsPath
* @return
*/
public static String getUploadPath(String linuxPath, String windowsPath) {
if(System.getProperty("").toLowerCase().indexOf("linux") > 0) {
return linuxPath;
}
return windowsPath;
}
}