Java IO把一个文件中的内容以字符串的形式读出来

/**
* 把一个文件中的内容以字符串的形式读出来
*
* @author zhipengs
*
*/
public class FileToString {
public static void main(String[] args) {
System.out.println(readFileToString());
}

private static String readFileToString() {
// new 一个空文件，用于获取路径
File dirs = new File(".");
BufferedReader reader = null;
StringBuilder fileData = null;
try {
String filePath = dirs.getCanonicalPath() + File.separator + "src"
+ File.separator + "TestRead.java";

fileData = new StringBuilder(1000);
reader = new BufferedReader(new FileReader(filePath));

char[] buf = new char[1024];
int numRead = 0;
while ((numRead = reader.read(buf)) != -1) {
String readData = String.valueOf(buf, 0, numRead);
fileData.append(readData);
buf = new char[1024];
}
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
if (null != reader)
reader.close();
} catch (IOException e) {
e.printStackTrace();
}
}
return fileData.toString();
}
}