cn.featherfly.web.servlet.StringPrintWriter Maven / Gradle / Ivy
package cn.featherfly.web.servlet;
import java.io.IOException;
import java.io.PrintWriter;
import java.io.StringWriter;
import cn.featherfly.common.lang.SystemPropertyUtils;
/**
*
* PrintWriter的包装类，所有的输出方法均使用传入的StringWriter实现.
*
*
* @author 钟冀
*/
public class StringPrintWriter extends PrintWriter {
private StringWriter sw;
/**
* @param sw
*/
public StringPrintWriter(StringWriter sw) {
super(sw);
try {
this.sw = sw;
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* {@inheritDoc}
*/
@Override
public void println(String s) {
sw.write(s);
}
/**
* {@inheritDoc}
*/
@Override
public void write(int c) {
sw.write(c);
}
/**
* {@inheritDoc}
*/
@Override
public void write(char buf[], int off, int len) {
sw.write(buf, off, len);
}
/**
* {@inheritDoc}
*/
@Override
public void write(char buf[]) {
sw.write(buf, 0, buf.length);
}
/**
* {@inheritDoc}
*/
@Override
public void write(String s, int off, int len) {
sw.write(s, off, len);
}
/**
* {@inheritDoc}
*/
@Override
public void write(String s) {
sw.write(s, 0, s.length());
}
/**
* {@inheritDoc}
*/
@Override
public void print(boolean b) {
sw.write(b ? "true" : "false");
}
/**
* {@inheritDoc}
*/
@Override
public void print(char c) {
sw.write(c);
}
/**
* {@inheritDoc}
*/
@Override
public void print(int i) {
sw.write(String.valueOf(i));
}
/**
* {@inheritDoc}
*/
@Override
public void print(long l) {
sw.write(String.valueOf(l));
}
/**
* {@inheritDoc}
*/
@Override
public void print(float f) {
sw.write(String.valueOf(f));
}
/**
* {@inheritDoc}
*/
@Override
public void print(double d) {
sw.write(String.valueOf(d));
}
/**
* {@inheritDoc}
*/
@Override
public void print(char s[]) {
try {
sw.write(s);
} catch (IOException e) {
e.printStackTrace();
}
}
/**
* {@inheritDoc}
*/
@Override
public void print(String s) {
if (s == null) {
s = "null";
}
sw.write(s);
}
/**
* {@inheritDoc}
*/
@Override
public void print(Object obj) {
sw.write(String.valueOf(obj));
}
/**
* {@inheritDoc}
*/
@Override
public void println() {
newLine();
}
/**
* {@inheritDoc}
*/
@Override
public void println(boolean x) {
synchronized (lock) {
print(x);
println();
}
}
/**
* {@inheritDoc}
*/
@Override
public void println(char x) {
synchronized (lock) {
print(x);
println();
}
}
/**
* {@inheritDoc}
*/
@Override
public void println(int x) {
synchronized (lock) {
print(x);
println();
}
}
/**
* {@inheritDoc}
*/
@Override
public void println(long x) {
synchronized (lock) {
print(x);
println();
}
}
/**
* {@inheritDoc}
*/
@Override
public void println(float x) {
synchronized (lock) {
print(x);
println();
}
}
/**
* {@inheritDoc}
*/
@Override
public void println(double x) {
synchronized (lock) {
print(x);
println();
}
}
/**
* {@inheritDoc}
*/
@Override
public void println(char x[]) {
synchronized (lock) {
print(x);
println();
}
}
/**
* {@inheritDoc}
*/
@Override
public void println(Object x) {
String s = String.valueOf(x);
synchronized (lock) {
print(s);
println();
}
}
/**
* {@inheritDoc}
*/
@Override
public PrintWriter append(CharSequence csq) {
if (csq == null)
sw.write("null");
else
sw.write(csq.toString());
return this;
}
/**
* {@inheritDoc}
*/
@Override
public PrintWriter append(CharSequence csq, int start, int end) {
CharSequence cs = (csq == null ? "null" : csq);
sw.write(cs.subSequence(start, end).toString());
return this;
}
/**
* {@inheritDoc}
*/
@Override
public PrintWriter append(char c) {
sw.write(c);
return this;
}
// ********************************************************************
//
// ********************************************************************
private String lineSeparator = SystemPropertyUtils.getLineSeparator();
private void newLine() {
sw.write(lineSeparator);
}
}