JSONBuilder可以向文件中写入写入json字符串。如下面的例子：
public class Test
{
public static void main(String args[]) throws IOException
{
File f = new File("d:" + File.separator + "test.txt");
FileWriter fw = new FileWriter(f);
JSONBuilder builder = new JSONBuilder(fw);
builder.object();
builder.key("Json");
builder.value("Hello, World!");
builder.endObject();
fw.flush();
fw.close();
}
}
输出结果为：{"Json":"Hello, World!"}