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 17:05:07 浏览: 66
可以使用Java中的Filter接口来实现过滤器,具体代码如下:
请求过滤器:
```
import javax.servlet.*;
import javax.servlet.http.HttpServletRequest;
import java.io.IOException;
public class RequestFilter implements Filter {
@Override
public void init(FilterConfig filterConfig) throws ServletException {
// 初始化操作
}
@Override
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
// 处理请求
HttpServletRequest httpRequest = (HttpServletRequest) request;
String requestURI = httpRequest.getRequestURI();
System.out.println("请求URI:" + requestURI);
// 继续执行过滤器链
chain.doFilter(request, response);
}
@Override
public void destroy() {
// 销毁操作
}
}
```
响应过滤器:
```
import javax.servlet.*;
import java.io.IOException;
public class ResponseFilter implements Filter {
@Override
public void init(FilterConfig filterConfig) throws ServletException {
// 初始化操作
}
@Override
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
// 处理响应
response.setContentType("text/html;charset=UTF-8");
chain.doFilter(request, response);
}
@Override
public void destroy() {
// 销毁操作
}
}
```
在web.xml中配置过滤器:
```
<filter>
<filter-name>RequestFilter</filter-name>
<filter-class>com.example.RequestFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>RequestFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<filter>
<filter-name>ResponseFilter</filter-name>
<filter-class>com.example.ResponseFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>ResponseFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
```
这样就可以实现请求和响应的字符串乱码处理了。
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