要使用Java過濾器獲取所有參數(shù)值,可以按照以下步驟進行操作:
javax.servlet.Filter
接口,并重寫doFilter
方法。public class MyFilter implements Filter {
@Override
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
throws IOException, ServletException {
HttpServletRequest httpRequest = (HttpServletRequest) request;
// 獲取所有請求參數(shù)的Map集合
Map<String, String[]> parameterMap = httpRequest.getParameterMap();
// 遍歷參數(shù)Map集合
for (Map.Entry<String, String[]> entry : parameterMap.entrySet()) {
String paramName = entry.getKey();
String[] paramValues = entry.getValue();
// 輸出參數(shù)名和值
System.out.println(paramName + " = " + Arrays.toString(paramValues));
}
// 繼續(xù)執(zhí)行過濾器鏈
chain.doFilter(request, response);
}
// 其他方法省略
}
web.xml
文件中配置過濾器。<filter>
<filter-name>myFilter</filter-name>
<filter-class>com.example.MyFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>myFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
以上代碼會將過濾器應(yīng)用到所有的URL上。你也可以根據(jù)需要修改<url-pattern>
的值。
http://localhost:8080/example?param1=value1¶m2=value2
輸出結(jié)果:
param1 = [value1]
param2 = [value2]
這樣就可以通過Java過濾器獲取到所有的參數(shù)值了。