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似水流年风萧兮 2019-08-03
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好，我试试，不过你那个CharacterEncodingFIlter类，全部刷红报错[/quote]
你都没引入正确，和引入相应包当然会报错了，你要学会看错误
最专业的Java劝退师 2019-08-03
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可以跳转到我写的那个类里面，
最专业的Java劝退师 2019-08-03
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好，我试试，不过你那个CharacterEncodingFIlter类，全部刷红报错
似水流年风萧兮 2019-08-03
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包名就是这个类所在的包，类名指的是你继承HttpServlet的那个类。在web.xml里，你ctrl+（鼠标移动到包名.类名上，可以点击进入），说明配置可以正常跳转到类
最专业的Java劝退师 2019-08-03
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那个xml里包名.类名指的是那个
似水流年风萧兮 2019-08-03
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忘记提供CharacterEncodingFilter类了
/*
* Copyright 2004 The Apache Software Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.icss.bk.filter;
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;
import javax.servlet.http.HttpServletRequest;
import java.io.UnsupportedEncodingException;
import java.util.Enumeration;
public class CharacterEncodingFilter implements Filter {
// ----------------------------------------------------- Instance Variables
/**
* The default character encoding to set for requests that pass through
* this filter.
*/
protected String encoding = null;
/**
* The filter configuration object we are associated with. If this value
* is null, this filter instance is not currently configured.
*/
protected FilterConfig filterConfig = null;
/**
* Should a character encoding specified by the client be ignored?
*/
protected boolean ignore = true;
// --------------------------------------------------------- Public Methods
/**
* Take this filter out of service.
*/
public void destroy() {
this.encoding = null;
this.filterConfig = null;
}
void encoding(HttpServletRequest request)
{
Enumeration<?> names = request.getParameterNames();
while (names.hasMoreElements())
{
String[] values = request.getParameterValues(names.nextElement().toString());
for (int i = 0; i < values.length; ++i)
{
try {
values[i] = new String(values[i].getBytes("ISO-8859-1"), encoding );
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
}
}
}
/**
* Select and set (if specified) the character encoding to be used to
* interpret request parameters for this request.
*
* @param request The servlet request we are processing
* @param result The servlet response we are creating
* @param chain The filter chain we are processing
*
* @exception IOException if an input/output error occurs
* @exception ServletException if a servlet error occurs
*/
public void doFilter(ServletRequest request, ServletResponse response,
FilterChain chain)
throws IOException, ServletException {
// Conditionally select and set the character encoding to be used
String xx = request.getCharacterEncoding();
if (ignore || (request.getCharacterEncoding() == null)) {
String encoding = selectEncoding(request);
if (encoding != null)
request.setCharacterEncoding(encoding);
HttpServletRequest r = (HttpServletRequest)request;
if(r.getMethod().equalsIgnoreCase("get")){
encoding(r);
}
}
// Pass control on to the next filter
chain.doFilter(request, response);
}
/**
* Place this filter into service.
*
* @param filterConfig The filter configuration object
*/
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;
}
// ------------------------------------------------------ Protected Methods
/**
* Select an appropriate character encoding to be used, based on the
* characteristics of the current request and/or filter initialization
* parameters. If no character encoding should be set, return
* <code>null</code>.
* <p>
* The default implementation unconditionally returns the value configured
* by the <strong>encoding</strong> initialization parameter for this
* filter.
*
* @param request The servlet request we are processing
*/
protected String selectEncoding(ServletRequest request) {
return (this.encoding);
}
}
似水流年风萧兮 2019-08-03
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试试加上这段
<filter>
<filter-name>CharacterEncodingFilter</filter-name>
<filter-class>com.icss.bk.filter.CharacterEncodingFilter</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>UTF-8</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>CharacterEncodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<servlet>
<servlet-name>Login</servlet-name>
<servlet-class>包名.类名</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>Login</servlet-name>
<url-pattern>/LoginServlet</url-pattern>
</servlet-mapping>
