Solution to jsp file garbled

Recently, Chinese garbled characters are frequently encountered when debugging Jsp files. The troubleshooting methods are summarized for your reference:
1. garbled characters are displayed on the Jsp file Page. In this case, it is better to handle it. Add the following code to the Page command on the Page:
<% @ Page contentType = "text/html; charset = gb2312" %>

2. When a Jsp page is submitted using a form, the submitted data contains Chinese characters. When we obtain the form data, garbled characters will also appear when it is displayed on other pages, the solution is to add the following line of code when receiving data in the submitted Servlet:
Request. setCharacterEncoding ("gb2312 ");
This is one of the methods. When there are few pages, it is better. If there are many pages, this sentence will be added for every new page I add, so we can use a filter to solve the problem, the specific steps are as follows:
First, write a filter class. The Code is as follows:
Package demo;
Import java. io. IOException;
Import javax. servlet. Filter;
Import javax. servlet. FilterChain;
Import javax. servlet. FilterConfig;
Import javax. servlet. ServletException;
Import javax. servlet. ServletRequest;
Import javax. servlet. ServletResponse;

Public class SetCharacterEncodingFilter implements Filter {
Public void destroy (){
}
Public void doFilter (ServletRequest request, ServletResponse response,
FilterChain chain) throws IOException, ServletException {
Request. setCharacterEncoding ("gbk ");
// Transfer control to the next Filter
Chain. doFilter (request, response );
}
Public void init (FilterConfig filterConfig) throws ServletException {
}
}
Then add the following code to the web. xml file:
<Filter>
<! -- Name the filter -->
<Filter-name> Set Character Encoding </filter-name>
<! -- The package name of the filter class. Class Name -->
<Filter-class> demo. SetCharacterEncodingFilter </filter-class>
</Filter>
<Filter-mapping>
<Filter-name> Set Character Encoding </filter-name>
<! -- Match all requests -->
<Url-pattern>/* </url-pattern>
</Filter-mapping>
In this way, all requests will be processed by this filter, so that no matter how many pages are added, you can rest assured that you do not always have to consider adding such a code.

3. garbled characters occur during database access. This phenomenon is depressing and complicated to handle.
First, we need to convert the following encoding when storing data into the database: for example, to store strings containing Chinese characters into the database, first:
String s = request. getParameter ("author ");
String author = new String (s. getBytes ("ISO8859_1"), "gb2312 ");
String s = rs. getString ("author ");
String author = new String (s. getBytes ("GB2312"), "ISO8859_1 ");