response中文处理解决乱码问题

response
1.response的中文处理、解决乱码问题；

    //使用字符流

    //设置浏览器默认编码utf8
    response.setHeader("content-type", "text/html;charset=utf-8");
    //设置response默认编码
    response.setCharacterEncoding("utf-8");
    //字符流输出中文
    response.getWriter().print("文本");



    //使用字节流

    //浏览器默认编码
        response.setHeader("content-type", "text/html;charset=utf-8");

    //response响应编码
        response.getOutputStream().write("中文".getBytes("utf-8"));

2.response生成验证码
//1,生成内存中的图片

    int width = 150;
    int height = 30;

    BufferedImage bufferedimage = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
    Graphics2D gp = (Graphics2D) bufferedimage.getGraphics();
    gp.setColor(Color.WHITE);
    gp.fillRect(0, 0, width, height);
    gp.setColor(Color.BLACK);
    gp.drawRect(0, 0, width-1, height-1);