String b = getParameter("name");
b = new String(dish_id.getBytes("GBK"), "UTF-8");
使用上述方法，当遇到奇数位中文时出现乱码。。。
还有其他方法转换吗？
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Filter
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恩，上述说写个filter是正确的，网上有很多这样的源码！
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帮顶 楼上~~
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可以试试URLEncoder试试。
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用java.nio.charset来解决这种问题，先查一下getbytes("GBK")后的是不是一个汉字三个字节
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10楼的兄弟那个是spring集成的CharacterEncodingFilter，如果不用spring的话就不行了
我这倒是有一个characterEncodingFilter的类，看看成不成
import javax.servlet.*;
import javax.servlet.http.HttpServletRequest;
import java.io.IOException;
/**
* Encoding Character to UTF-8
=================
*/
public class CharacterEncodingFilter
implements Filter {
private FilterConfig config = null;
// default to UTF-8
private String targetEncoding = "UTF-8";
public void init(FilterConfig config) throws ServletException {
this.config = config;
this.targetEncoding = config.getInitParameter("encoding");
}
public void destroy() {
config = null;
targetEncoding = null;
}
public void doFilter(ServletRequest srequest, ServletResponse sresponse,
FilterChain chain) throws IOException, ServletException {
HttpServletRequest request = (HttpServletRequest) srequest;
request.setCharacterEncoding(targetEncoding);
chain.doFilter(srequest, sresponse);
}
}
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你可以在传递之前就先讲字符转换成utf8的形式啊，然后在serlvet里面再转回来，就保证不回出错了。
转换的方式跟b = new String(dish_id.getBytes("GBK"), "UTF-8");
差不多，只是转为byte型，就可以了
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或者在过滤器里重写一个方法，好像是接收请求的方法。。。然后再操作，相当于是讲请求拦截了下来，
处理完成后，再继续执行下面的
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1.加了过滤器
2.你的MySQL里面的字符编码设置正确
定义SetCharacterEncodingFilter类，实现Filter接口，代码如下：
- Java code
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 {protected String encoding = null;protected FilterConfig filterConfig = null;protected boolean ignore = true;//destroy方法public void destroy() { this.encoding = null; this.filterConfig = null;}//选择设置使用的字符编码public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException { // Conditionally select and set the character encoding to be used if (ignore || (request.getCharacterEncoding() == null)) { String encoding = selectEncoding(request); if (encoding != null) request.setCharacterEncoding(encoding); } // Pass control on to the next filter chain.doFilter(request, response);}//将这个filter放置在服务器中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;}//选择适当的字符编码protected String selectEncoding(ServletRequest request) { return (this.encoding);}}配置这个Filter，只需在web.xml文件中添加如下代码：<filter> <filter-name>Set Character Encoding</filter-name> <filter-class>com.wanglei.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>