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public void write() throws IOException{
HttpServletResponse response=ServletActionContext.getResponse();
response.setContentType("text/html;charset=utf-8");
//response.setCharacterEncoding("UTF-8");
PrintWriter out = response.getWriter();
//JSON在传递过程中是普通字符串形式传递的,这里简单拼接一个做测试
String jsonString="{\"user\":{\"id\":\"123\",\"name\":\"张三\",\"say\":\"Hello , i am a action to print a json!\",\"password\":\"JSON\"},\"success\":true}";
out.println(jsonString);
out.flush();
out.close();
}