How to configure the filter filter to handle JSP garbled characters

Refer to the examples example of the Tomcat server directory WebApps

Simple configuration steps:
1. Add filter tags <filter> and <filter-mapping>; in Project Web. xml file
2. Implement the filter code;
3. Configure uriencoding for server.xml files in the Tomcat server conf directory;
4. The charset value of the foreground page setting contenttype is the same as the value set in Web. Xml.

Detailed configuration steps:
1. Configure the Web.xm file, add the filter configuration in the Web-app tab <filter> and <filter-mapping>

[HTML] view Plaincopy

<!--Chinese garbled processing filter--

1. <filter>
2. <filter-name>EncodingFilter</filter-name><!--Filter Name yourself--
3. <filter-class>com.filters.SetCharacterEncodingFilter</filter-class><!--filter class names, including package names consistent, Write All---
4. <init-param><!--initialization parameters, character set encoding to be specified--
5. <param-name>encoding</ param-name><!--Parameter name--
6. <param-value>GBK</param-value><!--parameter Value--
7. </init-param>
8. <init-param><!--initialization parameters, specifying whether to ignore case-and
9. <param-name>ignore </param-name>
10. <param-value>true</param-value>
11. </init-param>
12. </filter>
13. <filter-mapping>
14. <filter-name>EncodingFilter</filter-name>
15. <url-pattern>/*</url-pattern> <!--"/*" means all resources under the project--
16. </filter-mapping>
17. <!--Chinese garbled processing filter-->

2. Implement the filter code to create a Setcharacterencodingfilter class

[Java] view plaincopy

2. Package com.filters;
6. Import java.io.IOException;
10. Import Javax.servlet.Filter;
12. Import Javax.servlet.FilterChain;
14. Import Javax.servlet.FilterConfig;
16. Import javax.servlet.ServletException;
18. Import Javax.servlet.ServletRequest;
20. Import Javax.servlet.ServletResponse;
24. /**
26. * Custom Character processing filter
28. * Refer to from Tomcat directory Webapps\examples\web-inf\classes\filters
30. * @author Coderlu
32. * @since 2012-12-10
34. */
36. public class Setcharacterencodingfilter implements Filter {
40. protected Filterconfig filterconfig = null; Initialize configuration
42. protected String encoding = NULL; Receive character encoding
44. Protected Boolean ignore = true; Whether to ignore uppercase and lowercase
48. /* destructor
50. * @see Javax.servlet.filter#destroy ()
52. */
54. @Override
56. public void Destroy () {
58. this.encoding = null;
60. This.filterconfig = null;
62. }
66. /* Perform filtering operations
68. * @see Javax.servlet.filter#dofilter (javax.servlet.ServletRequest, Javax.servlet.ServletResponse, Javax.servlet.FilterChain)
70. */
72. @Override
74. public void DoFilter (ServletRequest request, servletresponse response,
76. Filterchain chain) throws IOException, Servletexception {
80. if (Ignore | | (request.getcharacterencoding () = = null)) {
82. String encoding = selectencoding (request); If NULL is first obtained from Web. xml
84. if (encoding! = NULL) {
86. request.setcharacterencoding (encoding); Setting Character Set encoding
88. }
90. }
92. Chain.dofilter (request, response);
94. }
98. /* Initialize Filter
100. * @see Javax.servlet.filter#init (javax.servlet.FilterConfig)
102. */
104. @Override
106. public void init (Filterconfig filterconfig) throws Servletexception {
108. This.filterconfig = Filterconfig;
110. this.encoding = Filterconfig.getinitparameter ("encoding"); Read the value of encoding from the Web. xml file
112. String value = filterconfig.getinitparameter ("Ignore"); Read the value of ignore from the Web. xml file
114. The following three cases are case-insensitive
116. if (value = = null)
118. This.ignore = true;
120. else if (Value.equalsignorecase ("true"))
122. This.ignore = true;
124. else if (value.equalsignorecase ("yes"))
126. This.ignore = true;
128. Else
130. This.ignore = false;
132. }
136. /**
138. * Get character encoding
140. * @param request
142. * @return
144. */
146. Protected String selectencoding (ServletRequest request) {
148. return (this.encoding);
150. }
152. }

3. Modify the Tomcat server Conf\server.xml file and add a uriencoding= "GBK"

[HTML] view Plaincopy

1. <!--uriencoding Configuration Server Response encoding set--
2. <connector port= "8080" protocol= "http/1.1"
3. connectiontimeout= "20000"
4. Redirectport= "8443"
5. uriencoding= "GBK"/>

4. Setting the foreground page character encoding set

[HTML] view Plaincopy

1. <%@ page contenttype= "TEXT/HTML;CHARSET=GBK"%>

The value of the charset here is the same as the <param-value></param-value> value in Web. xml

================================= Finish =====================================
Reference from:
Examples example of the Tomcat server directory WebApps
Filter filter configuration for JSP Chinese garbled: http://www.cnblogs.com/zhuboxingzbx/articles/1208118.html
JSP Chinese garbled, filter way to solve: http://www.zhouwenze.com/archives/20110729-411.html
JSP Chinese garbled filter Example: http://blog.csdn.net/wkupaochuan/article/details/7461208

http://blog.csdn.net/lutinghuan/article/details/8277422
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