Java中StringWriter的重要性是什么？
StringWriter 类是S的子类作家 类和它的字符串写入到输出流。要编写字符串，此字符流将字符串收集到字符串缓冲区中，然后构造一个字符串。StringWriter的缓冲区会根据数据自动增长。的StringWriter类的重要的方法是写()，，append()getBuffer()，冲洗()和关闭()。
语法
public class StringWriter extends Writer
示例
import java.io.*;
public class StringWriterTest {
public static void main(String args[]) {
String str = "Welcome to nhooo.com";
try {
StringWriter sw = new StringWriter();
sw.write(str);
StringBuffer sb = new StringBuffer();
sb = sw.getBuffer();
System.out.println("StringBuffer: "+ sb);
System.out.println("String written by StringWriter: "+ sw);
sw.close();
} catch (IOException ioe) {
System.out.println(ioe);
}
}
}输出结果
StringBuffer: Welcome to nhooo.com String written by StringWriter: Welcome to nhooo.com