JSP out.write()输出字符串
out对象的类型是JspWriter。JspWriter继承了java.io.Writer类,write是Writer类中定义的方法。
源码
public void write(int c) throws IOException { synchronized(lock) { if (writeBuffer == null) { writeBuffer = new char[writeBufferSize]; } writeBuffer[0] = (char) c; write(writeBuffer, 0, 1); } }
例子
out.write(6); //没有结果 out.write(6999999); //出现乱码 out.write(97); //结果:a(ASCII码) out.write(666 + ""); //结果:666
总结
1. write方法只能输出字符、字符数组和字符串等与字符相关的数据。
2. 如果字符串对象的值为null时,write方法则是抛出NullPointerException异常。
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