JSP三种中文解决方案及区别

方法一：只是针对某一个字符串起作用
String name=request.getParameter("name");
name=new String(name.getBytes("ISO-8859-1"),"utf-8");

方法二：针对当前页面有效
request.setCharacterEncoding("gbk");
String  name=request.getParameter("name");

方法三：针对真个web站点有效
采用过滤器原理

1. public class SetEncodingFilter implements Filter {
2.     protected String encoding = null;
3.     protected FilterConfig filterConfig = null;
4.     protected boolean ignore = true;
5.     public void destroy() {
6.         this.encoding = null;
7.         this.filterConfig = null;
8.     }
9.     public void doFilter(ServletRequest request, ServletResponse response,
10.             FilterChain chain) throws IOException, ServletException {
11.         if (ignore || (request.getCharacterEncoding() == null)) {
12.             request.setCharacterEncoding(selectEncoding(request));
13.         }
14.         chain.doFilter(request, response);
15.     }
16.     public void init(FilterConfig filterConfig) throws ServletException {
18.         this.filterConfig = filterConfig;
19.         this.encoding = filterConfig.getInitParameter("encoding");
20.         String value = filterConfig.getInitParameter("ignore");
21.         if (value == null)
22.             this.ignore = true;
23.         else if (value.equalsIgnoreCase("true")
24.                 || value.equalsIgnoreCase("yes"))
25.             this.ignore = true;
26.         else
27.             this.ignore = false;
28.     }
29.     protected String selectEncoding(ServletRequest request) {
30.         return (this.encoding);
31.     }
32.     public FilterConfig getFilterConfig() {
33.         return filterConfig;
34.     }
35.     public void setFilterConfig(FilterConfig filterConfig) {
36.         this.filterConfig = filterConfig;
37.     }
38. }

web.xml

1.         <filter>
2.         <filter-name>SetCharsetEncodingFilter</filter-name>
3.         <filter-class>filter.SetEncodingFilter</filter-class>
4.         <init-param>
5.             <param-name>encoding</param-name>
6.             <param-value>gbk</param-value>
7.         </init-param>
8.     </filter>
9.     <filter-mapping>
10.         <filter-name>SetCharsetEncodingFilter</filter-name>
11.         <url-pattern>/*</url-pattern>
12.     </filter-mapping>