捕获程序中出现的异常 可用于后期维护的必要性！做简单的测试 ！

复制代码 代码如下:

package helpEntity;

import java.io.BufferedReader;

import java.io.File;

import java.io.FileReader;

import java.io.FileWriter;

import java.io.PrintWriter;

import java.text.SimpleDateFormat;

import java.util.Date;

public class Log {

private File file = null;

public File getFile() {

return file;

}

public void setFile(File file) {

this.file = file;

}

public void saveLog(Exception e, String youName) {

try {

String nowPath = null;

nowPath = System.getProperty("user.dir");

String tempPath = null;

this.file = new File(nowPath);

tempPath = this.file.getParent();

if (tempPath == null) {

this.file = new File(nowPath);

}

this.file = new File(tempPath + "" + File.separator + "log.txt");

PrintWriter writer = null;

FileWriter fileWrite = new FileWriter(file, true);

writer = new PrintWriter(fileWrite);

writer.append(System.getProperty("line.separator")

+ new SimpleDateFormat("yyyy-MM-dd:HH:mm:ss")

.format(new Date()) + "__" + youName);

writer.append(System.getProperty("line.separator"));

writer.append(" *************************" + e.toString()

+ "*************************");

writer.append(System.getProperty("line.separator"));

e.printStackTrace(writer);

writer.flush();

writer.close();

} catch (Exception e2) {

e2.printStackTrace();

}

}

}