1.解决POST传送乱码的问题．
<filter>
<filter-name>Set Character Encoding</filter-name>
<filter-class>com.util.filters.SetCharacterEncodingFilter</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>UTF-8</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>Set Character Encoding</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
SetCharacterEncodingFilter:
package com.util.filters;
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;
import javax.servlet.UnavailableException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class SetCharacterEncodingFilter
implements Filter {
protected String encoding = null;
protected FilterConfig filterConfig = null;
protected boolean ignore = true;
public void destroy() {
this.encoding = null;
this.filterConfig = null;
}
public void doFilter(ServletRequest request, ServletResponse response,
FilterChain chain) throws IOException, ServletException {
// Conditionally select and set the character encoding to be used
request.setCharacterEncoding("GBK");
// Pass control on to the next filter
chain.doFilter(request, response);
}
public void init(FilterConfig filterConfig) throws ServletException {
this.filterConfig = filterConfig;
this.encoding = filterConfig.getInitParameter("encoding");
String value = filterConfig.getInitParameter("ignore");
if (value == null) {
this.ignore = true;
}
else if (value.equalsIgnoreCase("true")) {
this.ignore = true;
}
else if (value.equalsIgnoreCase("yes")) {
this.ignore = true;
}
else {
this.ignore = false;
}
}
protected String selectEncoding(ServletRequest request) {
return (this.encoding);
}
}
2．解决GET方式出现乱码的方案
tomcat的server.xml中
<Connector connectionTimeout="20000" maxSpareThreads="75" maxThreads="150" minSpareThreads="25" port="8080" redirectPort="8443" uRIEncoding="UTF-8" useBodyEncodingForURI="true">
</Connector>
注意其中的useBodyEncodingForURI="true"这句是是解决问题的关键，但缺省情况下没有，自己加进去。
然后再用Filter方案解决 解决GET的问题
3.乱码字符转换
byte[] bytes = str.getBytes("ISO8859-1");
String dept=new String(bytes);
AJAX
在用XMLHttpRequest发送请求时如用post方式传送数据,容易出现中文乱码问题!
在Ajax中,默认的编码方式是UTF-8,所以在服务器端用request.setCharacterEncoding("UTF-8");(对于java言,其它语言可能类似方法)设置编码即可解决大部份的编码问题!
对于服务器端返回的XML文件在用responseXML读取时也要注意编码问题!
以下是正确的处理方法：
response.setCharacterEncoding("UTF-8");-----(1)
PrintWriter out=response.getWriter();------(2)
out.println("返回内容");
如上所示,如果1、2的先后顺序发生变化就会产生乱码！