網站:
JavaEye
作者:
iwinyeah
鏈接：
http://iwinyeah.javaeye.com/blog/174644
發表時間: 2008年03月21日
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我的FieldOutputStream繼承了DataOutputStream，這樣就可以只更改很少量的代碼就實現了既支持原生格式又支持文本方式輸出了,稍候一段時間手機理財將可以實現備份和恢復（文本格式）功能了.
package util;
/**
* --------------------------------------------------
* 字段輸出流
* --------------------------------------------------
* 從DataOutputStream繼承
* 主要增加了向輸出流寫入文本格式的數據字段的能力
* 文本格式流將由TAB分隔字段，回車換行符分隔記錄
* --------------------------------------------------
*
* @author iwinyeah 李永超
* @version 1.0.0
* */
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.OutputStream;
public class FieldOutputStream extends DataOutputStream {
public final static int BIN_MODE = 0;
public final static int TXT_MODE = 1;
private final static byte[] fieldSplit = {'\t'};
private final static byte[] recordSplit = {'\r','\n'};
private int mode;
private boolean nextEnd = false;
public FieldOutputStream(OutputStream out, int mode) {
super(out);
this.mode = mode;
}
// 接著寫入的是否最后一個字段
// 寫第一個字段前以參數false調用它
// 寫最后一個字段前以參數false調用它
public void setNextEnd(boolean end){
nextEnd = end;
}
public void putBoolean(boolean value) throws IOException {
if (mode == 0) {
writeBoolean(value);
} else {
out.write(value ? '1' : '0');
out.write(nextEnd ? recordSplit : fieldSplit);
}
}
public void putByte(byte value) throws IOException {
if (mode == 0) {
writeByte(value);
} else {
out.write(String.valueOf(value).getBytes("UTF-8"));
out.write(nextEnd ? recordSplit : fieldSplit);
}
}
public void putShort(short value) throws IOException {
if (mode == 0) {
writeShort(value);
} else {
out.write(String.valueOf(value).getBytes("UTF-8"));
out.write(nextEnd ? recordSplit : fieldSplit);
}
}
public void putInt(int value) throws IOException {
if (mode == 0) {
writeInt(value);
} else {
out.write(String.valueOf(value).getBytes("UTF-8"));
out.write(nextEnd ? recordSplit : fieldSplit);
}
}
public void putLong(long value) throws IOException {
if (mode == 0) {
writeLong(value);
} else {
out.write(String.valueOf(value).getBytes("UTF-8"));
out.write(nextEnd ? recordSplit : fieldSplit);
}
}
public void putString(String value) throws IOException {
if (mode == 0) {
if (value == null) {
writeByte(0);
} else {
writeByte(1);
writeUTF(value);
}
} else {
if(value != null){
byte[] b = value.getBytes("UTF-8");
for(int i = 0; i < b.length; i++){
if(b[i] == '\n'){
out.write('\\');
out.write('n');
}
else if(b[i] == '\r'){
out.write('\\');
out.write('r');
}
else if(b[i] == '\t'){
out.write('\\');
out.write('t');}
else if(b[i] == '\b'){
out.write('\\');
out.write('b');}
else if(b[i] == '\f'){
out.write('\\');
out.write('f');
}else{
out.write(b[i]);
}
}
}
out.write(nextEnd ? recordSplit : fieldSplit);
}
}
}
讀回請參看另一篇:字段輸入流FieldInputStream.
http://iwinyeah.javaeye.com/admin/blogs/174645
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文章來源:
http://iwinyeah.javaeye.com/blog/174644