net.gdface.utils.SampleLog Maven / Gradle / Ivy
package net.gdface.utils;
import java.io.PrintStream;
/**
* 简单日志输出工具类
* @author guyadong
* @deprecated name spelling mistake, replaced by {@link SimpleLog}
*/
public class SampleLog {
/** 占位符 */
private static final String DELIM_STR = "{}";
private static final Object[] EMPTY_ARGS = new Object[0];
private static void log(PrintStream printStream,int level, String format, Object ... args){
if(null == printStream || null == format){
return;
}
if(null == args){
args = EMPTY_ARGS;
}
StringBuilder buffer = new StringBuilder(format.length() + 64);
int beginIndex = 0,endIndex = 0,count = 0;
while((endIndex = format.indexOf(DELIM_STR, beginIndex))>=0){
buffer.append(format.substring(beginIndex, endIndex));
try{
buffer.append(args[count++]);
}catch(IndexOutOfBoundsException e){
// 数组越界时对应占位符填null
buffer.append("null");
}
beginIndex = endIndex + DELIM_STR.length();
}
buffer.append(format.substring(beginIndex,format.length()));
Thread currentThread = Thread.currentThread();
StackTraceElement stackTrace = currentThread.getStackTrace()[level];
printStream.printf("[%s] (%s:%d) %s\n",
currentThread.getName(),
stackTrace.getFileName(),
stackTrace.getLineNumber(),
buffer.toString());
}
/**
* 向{@code printStream}输出日志信息
* example:
*
* log("name : {},age:{}","tom",23);
*
* @param printStream
* @param format 格式字符串,采用"{}"为占位符,占位符个数要与{@code args}数组长度匹配
* @param args 填充占位符的参数列表,如果数量小于占位符个数则多出的占位符填充"null"
*/
public static void log(PrintStream printStream,String format, Object ... args){
log(printStream,3,format,args);
}
/**
* 向控制台输出日志信息
* @param format 格式字符串,采用"{}"为占位符
* @param args
* @see #log(PrintStream, String, Object...)
*/
public static void log(String format, Object ... args){
log(System.out,3,format,args);
}
}