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package com.accphr.util;
import java.io.IOException;
import java.util.Iterator;
import java.util.Map;
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.http.HttpServletRequest;
/**
*
* 字符集过滤器
*
*/
public class CharacterEncodingFilter implements Filter {
/* 设置的字符集 */
private String encoding = "UTF-8";
public void destroy() {
}
@SuppressWarnings("unchecked")
public void doFilter(ServletRequest request, ServletResponse response,
FilterChain chain) throws IOException, ServletException {
// 处理服务器到客户端
response.setContentType("text/html;charset=" + this.encoding);
// 处理客户端到服务器
HttpServletRequest req = (HttpServletRequest) request;
String s = req.getMethod();// 获得表单提交方式
if (s.equalsIgnoreCase("post")) {
req.setCharacterEncoding(this.encoding);
} else if (s.equalsIgnoreCase("get")) {
Map<String, String[]> map = (Map<String, String[]>) req
.getParameterMap();
Iterator<String[]> it = map.values().iterator();
while (it.hasNext()) {
String[] paramValues = it.next();
for (int i = 0; i < paramValues.length; i++) {
byte[] b = paramValues[i].getBytes("ISO-8859-1");
paramValues[i] = new String(b, this.encoding);
}
}
}
chain.doFilter(request, response);
}
public void init(FilterConfig config) throws ServletException {
String encoding = config.getInitParameter("encoding");
if (StringUtils.isNotBlank(encoding)) {
this.encoding = StringUtils.trimToBlank(encoding);
}
}
}