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/**
* @author liweihan
* @time 2016/12/23 11:56
* @description 返回JSON格式！如果含有<br/> ，text/html就显示变化了！
* @param request
* @param response
* @param result
* @param callBack
* 参考：http://blog.sina.com.cn/s/blog_a03d702f010143tw.html
* text/html HTML
text/plain TXT
text/xml XML
application/json json字符串
text/html的意思是将文件的content-type设置为text/html的形式，浏览器在获取到这种文件时会自动调用html的解析器对文件进行相应的处理。
text/plain的意思是将文件设置为纯文本的形式，浏览器在获取到这种文件时并不会对其进行处理。
*/
public
void
printJsonAutoEncodeNoCache(HttpServletRequest request, HttpServletResponse response, String result, String callBack) {
if
(StringUtils.isNotBlank(callBack)) {
result =
new
StringBuffer(ToolUtil.filterHtml(callBack)).append(
"("
).append(result).append(
")"
).toString();
}
byte
[] outBytes;
try
{
String encoding =
"gbk"
;
if
(StringUtils.isNotBlank(request.getParameter(
"encoding"
))) {
encoding = request.getParameter(
"encoding"
);
}
if
(
"gbk"
.equalsIgnoreCase(encoding.trim())) {
response.setContentType(
"application/json; charset=GBK"
);
outBytes = result.getBytes(
"gbk"
);
}
else
{
response.setContentType(
"application/json; charset=UTF-8"
);
outBytes = result.getBytes(
"utf-8"
);
}
response.setHeader(
"Pragma"
,
"No-cache"
);
response.setHeader(
"Cache-Control"
,
"no-cache"
);
response.setDateHeader(
"Expires"
,
0
);
response.getOutputStream().write(outBytes);
// response.flushBuffer();
/**
* 2016-07-11-han-add - explain：
* response.flushBuffer():Forces any content in the buffer to be written to the client.
* A call to this method automatically commits the response, meaning the status code and headers will be written.
*
* java.lang.Object
extended byjava.io.OutputStream
extended byjavax.servlet.ServletOutputStream
OutputStream.flush(): 刷新此输出流并强制写出所有缓冲的输出字节。
OutputStream.close():关闭此输出流并释放与此流有关的所有系统资源。
*/
response.getOutputStream().flush();
response.flushBuffer();
response.getOutputStream().close();
}
catch
(IOException e) {
logger.error(
" ====== print result error"
, e);
}
}
|
注意一下，如果我们要返回JSON格式的数据，尽量设置response.setContentType()为application/json,这样可以防止运营商劫持！然后在我们的返回结果中加一些广告的JS代码！
本文转自韩立伟 51CTO博客，原文链接：http://blog.51cto.com/hanchaohan/1913122
，如需转载请自行联系原作者
