将内容写到txt文档里面并读取及删除的方法

1、将内容写到txt文档里面 

复制代码代码如下:

public static void writeFile() { 
String txtFileName = "emailRecord.txt"; 
String directoryPath = ""; 
try { 
directoryPath = WebplusContext.getRealPath("/apps/schoolfellow/upload/smsRecord"); 
File directory = new File(directoryPath); 
if (!directory.exists()) { 
directory.mkdirs(); 
} 
File txtFile = new File(directoryPath, txtFileName); 
FileOutputStream out = new FileOutputStream(txtFile, true); 
String line = System.getProperty("line.separator"); 
String smsContent = "将内容写到txt文件里面！" + line; 
out.write(smsContent.toString().getBytes("GBK")); 
out.close(); 
} catch (Exception ex) { 
log.error("将结果写入文件失败！", ex); 
} 
} 

2、读取文件里面的内容 

复制代码代码如下:

public void readerFile() { 
String filePath = WebplusContext.getServletContext().getRealPath("/apps/schoolfellow/upload/emailRecord/emailRecord.txt"); 
FileInputStream fis = null; 
try { 
fis = new FileInputStream(filePath); 
InputStreamReader reader = new InputStreamReader(fis, "GBK"); 
BufferedReader br = new BufferedReader(reader); 
String info = ""; 
schoolfellows = new ArrayList<SchoolfellowDataViewWrap>(); 
while ((info = br.readLine()) != null) { 
System.out.println(info); 
} 
br.close(); 
fis.close(); 
} catch (Exception ex) { 
log.error("读取数据失败", ex); 
} finally { 
} 
} 

3、清除txt文件里面的内容 

复制代码代码如下:

public void clearFileContent() { 
String filePath = WebplusContext.getServletContext().getRealPath("/apps/schoolfellow/upload/emailRecord/emailRecord.txt"); 
try { 
FileOutputStream out = new FileOutputStream(filePath,false); 
out.write(new String("").getBytes()); 
out.close(); 
script = "alert('清空发送邮件日志成功！');"; 
} catch (Exception ex) { 
script = "alert('清空文件的内容失败,因为没有发送邮件日志文件！');"; 
} 
}