Struts2.0中获取项目的上下文的两种方式

? Struts2.0中获取项目的上下文的两种方式

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方法一：

? StringBuffer sb=new StringBuffer();
??sb.append(File.separator+"images"+File.separator+"vacationImage");
??String path=ServletActionContext.getServletContext().getRealPath(sb.toString());

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方法二：

通过RequestUtils获取项目的上下文的信息：

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String path=RequestUtils.getServletPath(ServletActionContext.getRequest());

源代码如下：

public class RequestUtils {

??? /**
???? * Retrieves the current request servlet path.
???? * Deals with differences between servlet specs (2.2 vs 2.3+)
???? *
???? * @param request the request
???? * @return the servlet path
???? */
??? public static String getServletPath(HttpServletRequest request) {
??????? String servletPath = request.getServletPath();
???????
??????? String requestUri = request.getRequestURI();
??????? // Detecting other characters that the servlet container cut off (like anything after ';')
??????? if (requestUri != null && servletPath != null && !requestUri.endsWith(servletPath)) {
??????????? int pos = requestUri.indexOf(servletPath);
??????????? if (pos > -1) {
??????????????? servletPath = requestUri.substring(requestUri.indexOf(servletPath));
??????????? }
??????? }
???????
??????? if (null != servletPath && !"".equals(servletPath)) {
??????????? return servletPath;
??????? }
???????
??????? int startIndex = request.getContextPath().equals("") ? 0 : request.getContextPath().length();
??????? int endIndex = request.getPathInfo() == null ? requestUri.length() : requestUri.lastIndexOf(request.getPathInfo());

??????? if (startIndex > endIndex) { // this should not happen
??????????? endIndex = startIndex;
??????? }

??????? return requestUri.substring(startIndex, endIndex);
??? }

}

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