400 error occurred under SPRINGMVC

Today in running the original written code is suddenly appear HTTP400 error. After a long search on the internet, I finally found the problem.

The reason is that the value type passed by the form form is inconsistent with the type of parameter received in the background

At the front desk. A string-type character, while in the background it is received with a long. Although the background is received, the type is automatically converted. But because the foreground property string is not a number, so the conversion error. Cause 400 error. A 400 error is also caused by the discovery of an online search and a parameter ordering. See http://my.oschina.net/fqt520/blog/264261 for details.

400 error occurred under SPRINGMVC