Java生成数据

public class DBToDBRunnerTest {

public static void main(String[] args) {
int lineNum = 1000;

StringBuffer destSb = new StringBuffer();
String field1 = "20150731";
String field2 = "1001";
String field3 = "www.baidu.com\n";
String srcStr = field1 + "\t" + field2 + "\t" + field3;

for(int i = 0; i < lineNum; i++) {
destSb.append(srcStr);
}

String filePath = "d:\\testData.txt";
CommonUtils.string2File(destSb.toString() , filePath , "UTF-8");
System.out.println("generate data OK");
}

}

class CommonUtils {
public static void string2File(String srcStr, String filePath, String encoding) {
try {
BufferedReader reader = null;
BufferedWriter writer = null;
try {
reader = new BufferedReader(new StringReader(srcStr));
writer = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(filePath), encoding));
char[] buf = new char[4096];
int len;
while ((len = reader.read(buf)) != -1) {
writer.write(buf, 0, len);
}
} finally {
try {
reader.close();
} finally {
writer.close();
}
}
} catch (Exception e) {
e.printStackTrace();
}
}
}