struts2直接返回字符串

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