过滤器配置
XML code
<filter>
<filter-name>encoding </filter-name>
<filter-class>
filter.FilterEncoding
</filter-class>
<init-param>
<param-name>encoding </param-name>
<param-value>gbk </param-value>
</init-param>
</filter>
Java code
package 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;
public class FilterEncoding implements Filter
{
protected String encoding; // 接收字符编码
protected boolean ignore; // 是否忽略大小写
protected FilterConfig filterConfig; // 初始化配置 public void init(FilterConfig filterConfig) throws ServletException
{
// 从web.xml文件中读取encoding的值
encoding = filterConfig.getInitParameter("encoding");
// 从web.xml文件中读取ignore的值
String value = filterConfig.getInitParameter("ignore");
// 以下三种情况均为忽略大小写
if(value == null)
{
ignore = true;
}
else if(value.equalsIgnoreCase("yes"))
{
ignore = true;
}
else if(value.equalsIgnoreCase("true"))
{
ignore = true;
}
}
// doFilter方法
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException
{
if(ignore ¦ ¦ request.getCharacterEncoding() == null)
{
// 如果为空先从web.xml中得到
String encoding = selectEncoding(request);
if(encoding != null)
{
// 设置字符集编码
request.setCharacterEncoding(encoding);
}
}
// 继续执行
chain.doFilter(request, response);
}
// 得到字符编码
private String selectEncoding(ServletRequest request)
{
return encoding;
}
public void destroy()
{
}
}
如果是url的get提交参数带中文的
可以改下面这个文件,加入一个URIEncoding="GBK"
X:\Tomcat 5.5\conf\Server.xml
<Connector
port="8080"
redirectPort="8443"
minSpareThreads="25"
connectionTimeout="30"
maxThreads="150"
maxSpareThreads="75"
URIEncoding="GBK"> HTML code <%@ page contentType="text/html;charset=gbk"%> //此处的charset的值要和web.xml里的 <param-value> </param-value>值一样
XML code
<filter>
<filter-name>encoding </filter-name>
<filter-class>
filter.FilterEncoding
</filter-class>
<init-param>
<param-name>encoding </param-name>
<param-value>gbk </param-value>
</init-param>
</filter>
Java code
package 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;
public class FilterEncoding implements Filter
{
protected String encoding; // 接收字符编码
protected boolean ignore; // 是否忽略大小写
protected FilterConfig filterConfig; // 初始化配置 public void init(FilterConfig filterConfig) throws ServletException
{
// 从web.xml文件中读取encoding的值
encoding = filterConfig.getInitParameter("encoding");
// 从web.xml文件中读取ignore的值
String value = filterConfig.getInitParameter("ignore");
// 以下三种情况均为忽略大小写
if(value == null)
{
ignore = true;
}
else if(value.equalsIgnoreCase("yes"))
{
ignore = true;
}
else if(value.equalsIgnoreCase("true"))
{
ignore = true;
}
}
// doFilter方法
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException
{
if(ignore ¦ ¦ request.getCharacterEncoding() == null)
{
// 如果为空先从web.xml中得到
String encoding = selectEncoding(request);
if(encoding != null)
{
// 设置字符集编码
request.setCharacterEncoding(encoding);
}
}
// 继续执行
chain.doFilter(request, response);
}
// 得到字符编码
private String selectEncoding(ServletRequest request)
{
return encoding;
}
public void destroy()
{
}
}
如果是url的get提交参数带中文的
可以改下面这个文件,加入一个URIEncoding="GBK"
X:\Tomcat 5.5\conf\Server.xml
<Connector
port="8080"
redirectPort="8443"
minSpareThreads="25"
connectionTimeout="30"
maxThreads="150"
maxSpareThreads="75"
URIEncoding="GBK"> HTML code <%@ page contentType="text/html;charset=gbk"%> //此处的charset的值要和web.xml里的 <param-value> </param-value>值一样
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放在servlet里面啊
信息: Reloading context [/ownHome]
2008-5-4 16:03:13 org.apache.catalina.core.StandardContext filterStart
严重: Exception starting filter encoding
java.lang.ClassNotFoundException: filter.FilterEncoding
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1358)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1204)
at org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:249)
at org.apache.catalina.core.ApplicationFilterConfig.setFilterDef(ApplicationFilterConfig.java:397)
at org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFilterConfig.java:108)
at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:3693)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4342)
at org.apache.catalina.startup.HostConfig.checkResources(HostConfig.java:1105)
at org.apache.catalina.startup.HostConfig.check(HostConfig.java:1203)
at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:293)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:120)
at org.apache.catalina.core.ContainerBase.backgroundProcess(ContainerBase.java:1307)
at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1571)
at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1580)
at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.run(ContainerBase.java:1560)
at java.lang.Thread.run(Thread.java:595)
2008-5-4 16:03:13 org.apache.catalina.core.StandardContext start
严重: Error filterStart
2008-5-4 16:03:13 org.apache.catalina.core.StandardContext start
严重: Context [/ownHome] startup failed due to previous errors
信息: Reloading context [/ownHome]
2008-5-4 16:05:33 org.apache.catalina.core.StandardContext stop
信息: Container org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/ownHome] has not been started
2008-5-4 16:05:34 org.apache.catalina.core.StandardContext filterStart
严重: Exception starting filter encoding
java.lang.ClassNotFoundException: filter.FilterEncoding
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1358)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1204)
at org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:249)
at org.apache.catalina.core.ApplicationFilterConfig.setFilterDef(ApplicationFilterConfig.java:397)
at org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFilterConfig.java:108)
at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:3693)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4342)
at org.apache.catalina.startup.HostConfig.checkResources(HostConfig.java:1105)
at org.apache.catalina.startup.HostConfig.check(HostConfig.java:1203)
at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:293)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:120)
at org.apache.catalina.core.ContainerBase.backgroundProcess(ContainerBase.java:1307)
at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1571)
at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1580)
at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.run(ContainerBase.java:1560)
at java.lang.Thread.run(Thread.java:595)
2008-5-4 16:05:34 org.apache.catalina.core.StandardContext start
严重: Error filterStart
2008-5-4 16:05:34 org.apache.catalina.core.StandardContext start
严重: Context [/ownHome] startup failed due to previous errors
// filter.FilterEncoding
包名加你的类名 看看你自己是放在那个包下 他的是 filter 包。
</filter-class>
代码就按楼上的建立了一个CLASS 然后把代码复制乱码啊,还是啊,不知道怎么回事
-----------------------------------------------------------------------
package com.web.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;public class EncodingFilter implements Filter {
private String encode; //定义一个属性,用来存放你设置的编码
public void destroy() {
encode = null; //destroy方法把属性回收
} public void doFilter(ServletRequest request, ServletResponse response,
FilterChain chain) throws IOException, ServletException {
request.setCharacterEncoding(encode);
response.setCharacterEncoding(encode);
chain.doFilter(request, response);
} public void init(FilterConfig config) throws ServletException {
encode = config.getInitParameter("encode"); //init方法读入初始化参数并赋值给属性
}
}
-----------------------------------------------------------------------<web-app ....>
....
<filter>
<filter-name>EncodingFilter</filter-name>
<filter-class>com.web.filter.EncodingFilter</filter-class>
<init-param>
<param-name>encode</param-name> <!--这里定义初始化参数encode,并与程序中init方法读入-->
<param-value>UTF-8</param-value> <!--这里是参数值,可以修改编码参数值,而不改变源代码 -->
</init-param>
</filter>
<filter-mapping>
<filter-name>EncodingFilter</filter-name>
<url-pattern>/*</url-pattern> <!--对所有根目录下的页面过滤,每次有请求发出,都会被过滤-->
</filter-mapping>
.....
</web-app>