用Java中的过滤器写两个filter一个写请求,一个写响应字符串乱码处理
时间: 2023-05-17 13:04:59 浏览: 49
可以使用Java中的过滤器来处理请求和响应中的字符串乱码。以下是一个简单的示例代码:
```java
import javax.servlet.*;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
public class CharsetFilter implements Filter {
private String encoding;
@Override
public void init(FilterConfig filterConfig) throws ServletException {
encoding = filterConfig.getInitParameter("encoding");
}
@Override
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
HttpServletRequest req = (HttpServletRequest) request;
HttpServletResponse resp = (HttpServletResponse) response;
req.setCharacterEncoding(encoding);
resp.setCharacterEncoding(encoding);
chain.doFilter(req, resp);
}
@Override
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>
```
这样就可以在请求和响应中处理字符串乱码了。