javaWeb开发中的字符过滤器配置--->让你二步轻松告别乱码

最新推荐文章于 2022-05-18 22:32:14 发布

原创最新推荐文章于 2022-05-18 22:32:14 发布 · 580 阅读

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文章标签：

#encoding #filter #null #string #class #java

字符过滤器

1,配置web.xml:

<filter>
<filter-name>encodingFilter</filter-name>
<filter-class>com.ssh.jboa.util.CharSetFileter</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>UTF-8</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>encodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>

2,编写java类文件继承Filter:

package com.ssh.jboa.util;

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 CharSetFileter implements Filter {

String encoding = null;

FilterConfig filterConfig = null;

// 初始化方法

public void init(FilterConfig filterConfig) throws ServletException {

this.filterConfig = filterConfig;

this.encoding = filterConfig.getInitParameter("encoding");

System.err.println(encoding);

}

// 过滤处理方法

public void doFilter(ServletRequest request, ServletResponse response,

FilterChain chain) throws IOException, ServletException {

if (encoding != null) {

// 对请求进行编码设置

request.setCharacterEncoding(encoding);

}

// 将处理权转交给下一个处理器

chain.doFilter(request, response);

}

// 销毁方法

public void destroy() {

this.encoding = null

this.filterConfig = null;

}

}