用struts2一直很舒服.就是缺少一個方便的返回字符串的方法.今天終於耐着性子看了看.原來不是很難啊..集成個類就可以了..廢話不說了.直接看代碼吧..
/**
* 擴展Struts2返回類型,直接返回String
*
* @author Carmack Created on 2009-3-24 下午03:36:32
*/
public class StringResult extends ServletRedirectResult {
/**
* @author Carmack Created on 2009-3-24 下午03:36:24
*/
private static final long serialVersionUID = -2800270132418148253L;
private static final Logger LOG = LoggerFactory.getLogger(StringResult.class);
public StringResult(){
super();
}
public StringResult(String location){
super(location);
}
public void doExecute(String finalLocation, ActionInvocation invocation) throws Exception {
HttpServletResponse response = (HttpServletResponse) invocation.getInvocationContext().get(HTTP_RESPONSE);
HttpServletRequest request = (HttpServletRequest) invocation.getInvocationContext().get(HTTP_REQUEST);
response.setContentType("text/plain; charset=UTF-8");
response.setHeader("Content-Disposition","inline");
PrintWriter writer = null;
try {
writer = response.getWriter();
writer.write(request.getAttribute(finalLocation).toString());
} catch(NullPointerException e) {
if(finalLocation.equals("")){
LOG.warn("未指定value",e);
}else{
LOG.error("空",e);
}
} finally {
if (writer != null) {
writer.flush();
writer.close();
}
}
}
}使用也很簡單啦. 在Action上寫
@Results({ @Result(name ="strResult", type=StringResult.class, value="testStr")})
在方法中先給testStr賦值,返回直接返回sttrResult就OK啦.
testStr ="測試返回字符串123abc";
return"strResult";
因爲我們的項目都是UTF-8編碼的,所以沒有做字符編碼的處理.有興趣的朋友自己處理吧.
可以查看org.apache.struts2.dispatcher.PlainTextResult
