解决中文乱码的filter(包括get和post提交两种方式)

解决中文乱码的filter(包括get和post提交两种方式)

public class TomcatFormFilter implements Filter {

public void destroy() {
// TODO Auto-generated method stub

}

public void doFilter(ServletRequest request,
ServletResponse response, FilterChain chain) throws IOException,
ServletException {
// 1. ServletRequest 转成 HttpServletRequest
HttpServletRequest req =
(HttpServletRequest)request;

// 2. 如果是GET，就生成一个Wrapper对象，覆盖获取参数的方法进行转码
if("GET".equalsIgnoreCase(req.getMethod()))
{
req = new
MyRequest(req);
}
// 3.
如果是POST，request.setCharacterEncoding("UTF-8")
else
if("POST".equalsIgnoreCase(req.getMethod())) {
req.setCharacterEncoding("UTF-8");
}
// 4.调用chain.doFilter继续向后执行
chain.doFilter(req, response);
}

public void init(FilterConfig arg0) throws
ServletException {
// TODO Auto-generated method stub

}

}

class MyRequest extends HttpServletRequestWrapper {

public MyRequest(HttpServletRequest request)
{
super(request);
// TODO Auto-generated constructor stub
}

public String changeEncoding(String input, String
srcEncoding, String targetEncoding) {
try {
// 1. 获取源编码的bytes[]
byte[] data =
input.getBytes(srcEncoding);
// 2.
将bytes[]按照制定编码转换为String
return new String(data,
targetEncoding);
} catch (UnsupportedEncodingException e) {
// TODO Auto-generated catch
block
e.printStackTrace();
}

return input;
}

@Override
public String getParameter(String name) {
String value = super.getParameter(name);

if(value != null) {
value = changeEncoding(value,
"ISO8859-1", "UTF-8");
}
return value;
}

@Override
public String[] getParameterValues(String name)
{
String[] values =
super.getParameterValues(name);
if(values != null && values.length >
0) {
for (int i = 0; i <
values.length; i++) {
String value
= values[i];

values[i] =
changeEncoding(value, "ISO8859-1", "UTF-8");
}
}
return values;
}

}