java stringreader_java – 如何将StringReader转换为String？

StringReader的toString方法不返回StringReader内部缓冲区.

你需要从StringReader读取这个.

我建议使用接受字符数组的read的重载.批量读取速度高于单字符读取.

即.

//use string builder to avoid unnecessary string creation.

StringBuilder builder = new StringBuilder();

int charsRead = -1;

char[] chars = new char[100];

do{

charsRead = reader.read(chars,chars.length);

//if we have valid chars,append them to end of string.

if(charsRead>0)

builder.append(chars,charsRead);

}while(charsRead>0);

String stringReadFromReader = builder.toString();

System.out.println("String read = "+stringReadFromReader);