response.setContentType()类型及解释

response.setContentType(MIME)的作用是使客户端浏览器，区分不同种类的数据，并根据不同的MIME调用浏览器内不同的程序嵌入模块来处理相应的数据。

MIME类型：
tomcat的安装目录\conf\web.xml定义了大量的类型，例如：
<mime-mapping>
<extension>html</extension>
<mime-type>text/html</mime-type>html类型数据
</mime-mapping>
<mime-mapping>
<extension>json</extension>
<mime-type>application/json</mime-type>json格式数据
</mime-mapping>
<mime-mapping>
<extension>text</extension>
<mime-type>text/plain</mime-type>文本数据
</mime-mapping>
等等。。。。。

response.setContentType("text/html");
response.setCharacterEncoding("UTF-8");
response.setHeader("Cache-Control", "no-cache");
java.io.PrintWriter pw = null;
try{
pw = response.getWriter();
pw.write(print.get("result")); //将需要返回的数据
}catch (Exception e){
//
}finally{
pw.close();
}

常见ContentType类型：
<option   value="image/bmp">BMP</option>
<option   value="image/gif">GIF</option>
<option   value="image/jpeg">JPEG</option>
<option   value="image/tiff">TIFF</option>
<option   value="image/x-dcx">DCX</option>
<option   value="image/x-pcx">PCX</option>
<option   value="text/html">HTML</option>
<option   value="text/plain">TXT</option>
<option   value="text/xml">XML</option>
<option   value="application/afp">AFP</option>
<option   value="application/pdf">PDF</option>
<option   value="application/rtf">RTF</option>
<option   value="application/msword">MSWORD</option>
<option   value="application/vnd.ms-excel">MSEXCEL</option>
<option   value="application/vnd.ms-powerpoint">MSPOWERPOINT</option>
<option   value="application/wordperfect5.1">WORDPERFECT</option>
<option   value="application/vnd.lotus-wordpro">WORDPRO</option>
<option   value="application/vnd.visio">VISIO</option>
<option   value="application/vnd.framemaker">FRAMEMAKER</option>
<option   value="application/vnd.lotus-1-2-3">LOTUS123</option>

引用于：http://blog.sina.com.cn/s/blog_a03d702f010143tw.html