java - 如何用JAVA发回JSON？

Question

我有问题 using Gzip compression and JQuery together .看来这可能是由我在 Struts Actions 中发送 JSON 响应的方式引起的。我使用下一个代码将我的 JSON 对象发回。

public ActionForward get(ActionMapping mapping,
    ActionForm     form,
    HttpServletRequest request,
    HttpServletResponse response) {
       JSONObject json = // Do some logic here
       RequestUtils.populateWithJSON(response, json);
       return null;             
}

public static void populateWithJSON(HttpServletResponse response,JSONObject json) {
    if(json!=null) {
        response.setContentType("text/x-json;charset=UTF-8");           
        response.setHeader("Cache-Control", "no-cache");
        try {
             response.getWriter().write(json.toString());
        } catch (IOException e) {
            throw new ApplicationException("IOException in populateWithJSON", e);
        }                               
    }
 }

有没有更好的方法在 Java 网络应用程序中发送 JSON？

Answer 1

代替

try {
       response.getWriter().write(json.toString());
} catch (IOException e) {
       throw new ApplicationException("IOException in populateWithJSON", e);
}        

试试这个

try {
        json.write(response.getWriter());
} catch (IOException e) {
        throw new ApplicationException("IOException in populateWithJSON", e);
}                                      

因为这会避免创建字符串，JSONObject 会直接将字节写入 Writer 对象