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Just wonder what is behind the scene. Actually it seems that we can set the encoding with:
response.setContentType("text/html; charset=UTF-8")response.setCharacterEncoding("UTF-8")What is the difference?
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setContentType. Sets the content type of the response being sent to the client, if the response has not been committed yet. The given content type may include a character encoding specification, for example, text/html;charset=UTF-8 .
getWriter. Returns a PrintWriter object that can send character text to the client. The PrintWriter uses the character encoding returned by getCharacterEncoding() .
A ServletResponse object is created by the servlet container and passed as an argument to the servlet's service function. Use the ServletOutputStream supplied by getOutputStream to deliver binary data in a MIME body response (). Use the PrintWriter object given by getWriter to deliver character data ().
A ServletRequest object provides data including parameter name and values, attributes, and an input stream. Interfaces that extend ServletRequest can provide additional protocol-specific data (for example, HTTP data is provided by HttpServletRequest .
The javadoc is pretty clear about the difference:
void setCharacterEncoding(String charset)Sets the character encoding (MIME charset) of the response being sent to the client, for example, to UTF-8. If the character encoding has already been set bysetContentType(java.lang.String)orsetLocale(java.util.Locale), this method overrides it. CallingsetContentType(java.lang.String)with the String oftext/htmland calling this method with the String of UTF-8 is equivalent with callingsetContentTypewith the String oftext/html; charset=UTF-8.
void setContentType(String type)Sets the content type of the response being sent to the client, if the response has not been committed yet. The given content type may include a character encoding specification, for example,text/html;charset=UTF-8.
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