在Struts2拦截器中更改请求参数值

也许您可以这样尝试。

public String intercept(ActionInvocation invocation) throws Exception {    final ActionContext context = invocation.getInvocationContext();    Map<String,Object> parameters = (Map<String,Object>)context.get(ActionContext.PARAMETERS);    Map<String, Object> parametersCopy = new HashMap<String, Object>();    parametersCopy.putAll(parameters);    parametersCopy.put("myParam", "changedValue");    context.put(ActionContext.PARAMETERS, parametersCopy);    return invocation.invoke();}