用java中的过滤器两个filter写一个请求,一个响应字符串乱码处理
时间: 2023-05-13 07:06:53 浏览: 100
可以使用以下代码来处理请求和响应字符串的乱码:
```java
public class CharsetFilter implements Filter {
private String encoding;
public void init(FilterConfig config) throws ServletException {
encoding = config.getInitParameter("encoding");
if (encoding == null) {
encoding = "UTF-8";
}
}
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
throws IOException, ServletException {
request.setCharacterEncoding(encoding);
response.setCharacterEncoding(encoding);
chain.doFilter(request, response);
}
public void destroy() {
encoding = null;
}
}
```
在 web.xml 文件中配置过滤器:
```xml
<filter>
<filter-name>CharsetFilter</filter-name>
<filter-class>com.example.CharsetFilter</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>UTF-8</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>CharsetFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
```
这样就可以在整个应用程序中使用该过滤器来处理请求和响应字符串的乱码问题了。
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