struts2直接返回字符串..终于弄好了!
用struts2一直很舒服.就是缺少一个方便的返回字符串的方法.今天终于耐着性子看了看.原来不是很难啊..集成个类就可以了..废话不说了.直接看代码吧..
/**
* 扩展Struts2返回类型,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();
}
}
}
}
使用也很简单啦.
在Action上写
@Results({ @Result(name = "strResult" , type=StringResult.class, value="testStr")})
在方法中先给testStr赋值,返回直接返回sttrResult就OK啦.
testStr = "测试返回字符串123abc"; return "strResult";
因为我们的项目都是UTF-8编码的,所以没有做字符编码的处理.有兴趣的朋友自己处理吧.
可以查看org.apache.struts2.dispatcher.PlainTextResult