1,在action中的代码

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		HttpServletResponse response = ServletActionContext.getResponse(); 
	    response.getWriter().print(str);

?配置文件和页面文件和原来一样即可

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2,要解决返回的中文是乱码的问题，可加入下列一行代码

HttpServletResponse response = ServletActionContext.getResponse(); 
		response.setContentType("text/html;charset=utf-8");
	    response.getWriter().print(str);