src/org/nutz/lang/Streams.java
public static StringBuilder read(Reader reader) throws IOException {
        StringBuilder sb = new StringBuilder();
        read(reader, sb);
        return sb;
    }
public static StringBuilder read(Reader reader) throws IOException {
        StringBuilder sb = new StringBuilder();
        read(reader, sb);
        return sb;
    }
从一个文本流中读取全部内容并返回
<p>
<b style=color:red>注意</b>，它并不会关闭输出流

@param reader
文本输出流
@return 文本内容
@throws IOException