设置网站字符集

/**
* 解决get和post请求全部乱码
*
* @author 俊
*
*/
public class GenericEncodingFilter implements Filter {

@Override
public void destroy() {
}

@Override
public void doFilter(ServletRequest request, ServletResponse response,
   FilterChain chain) throws IOException, ServletException {
  // 转型为与协议相关对象
  HttpServletRequest httpServletRequest = (HttpServletRequest) request;
  // 对request包装增强
  HttpServletRequest myrequest = new MyRequest(httpServletRequest);
  chain.doFilter(myrequest, response);
}

@Override
public void init(FilterConfig filterConfig) throws ServletException {
}

}

// 自定义request对象
class MyRequest extends HttpServletRequestWrapper {

private HttpServletRequest request;

private boolean hasEncode;

public MyRequest(HttpServletRequest request) {
super(request);// super必须写
this.request = request;
}

// 对需要增强方法进行覆盖
@Override
public Map getParameterMap() {
  // 先获得请求方式
  String method = request.getMethod();
  if (method.equalsIgnoreCase("post")) {
   // post请求
   try {
    // 处理post乱码
    request.setCharacterEncoding("utf-8");
    return request.getParameterMap();
   } catch (UnsupportedEncodingException e) {
    e.printStackTrace();
   }
  } else if (method.equalsIgnoreCase("get")) {
   // get请求
   Map<String, String[]> parameterMap = request.getParameterMap();
   if (!hasEncode) { // 确保get手动编码逻辑只运行一次
    for (String parameterName : parameterMap.keySet()) {
     String[] values = parameterMap.get(parameterName);
     if (values != null) {
      for (int i = 0; i < values.length; i++) {
       try {
        // 处理get乱码
        values[i] = new String(values[i]
          .getBytes("ISO-8859-1"), "utf-8");
       } catch (UnsupportedEncodingException e) {
        e.printStackTrace();
       }
      }
     }
    }
    hasEncode = true;
   }
   return parameterMap;
  }

return super.getParameterMap();
}

@Override
public String getParameter(String name) {
  Map<String, String[]> parameterMap = getParameterMap();
  String[] values = parameterMap.get(name);
  if (values == null) {
   return null;
  }
  return values[0]; // 取回参数的第一个值
}

@Override
public String[] getParameterValues(String name) {
  Map<String, String[]> parameterMap = getParameterMap();
  String[] values = parameterMap.get(name);
  return values;
}

}

猜你喜欢