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String keyword = new String(request.getParameter("keyword").getBytes("iso-8859-1"),"utf-8");

2， 就是從 tomcat 的配置入手，修改 server.xml 文件 （SUN 不推薦此做法）

<Connector port="8088"  maxThreads="150" 
minSpareThreads="25" maxSpareThreads="75" 
enableLookups="false" redirectPort="8443" 
acceptCount="100" debug="0" connectionTimeout="20000"
disableUploadTimeout="true" URIEncoding="UTF-8"  />

下面給大家介紹給一勞永逸的做法，搞個(gè)過(guò)濾器既能解決 GET 編碼，又能解決 POST 編碼，是不是很 cool ？
public class CnRequestWrapper extends HttpServletRequestWrapper {
	public CnRequestWrapper(HttpServletRequest request) {		super(request);	}
   	@Override	public String getParameter(String name) {				String value = super.getParameter(name);		if (value != null && !"".equals(value)) {			try {				value = new String(value.getBytes(), "UTF-8");			} catch (UnsupportedEncodingException e) {				e.printStackTrace();			}		}		return value;	}	
}

然后在自己的 CharsetFilter 中使用這個(gè)自定義的包裝器將請求包裝一下即可
	public void doFilter(ServletRequest req, ServletResponse res,			FilterChain chain) throws IOException, ServletException {	
		HttpServletRequest request = (HttpServletRequest) req;		chain.doFilter(new CnRequestWrapper(request), res);	}

最后，在程序中就不用再擔心編碼的問(wèn)題了