简述：

在servlet填充Response的时候，做JSON格式的数据转换

使用的类是net.sf.json.JSONObject，传入response对象和返回的显示类，修改response，返回前台JSON格式数据

代码：

/**

* 以JSON格式输出

* @param response

*/

protected void responseOutWithJson(HttpServletResponse response,

Object responseObject) {

//将实体对象转换为JSON Object转换

JSONObject responseJSONObject = JSONObject.fromObject(responseObject);

response.setCharacterEncoding("UTF-8");

response.setContentType("application/json; charset=utf-8");

PrintWriter out = null;

try {

out = response.getWriter();

out.append(responseJSONObject.toString());

logger.debug("返回是\n");

logger.debug(responseJSONObject.toString());

} catch (IOException e) {

e.printStackTrace();

} finally {

if (out != null) {

out.close();

}

}

}

例如：

try {

HttpServletRequest request = ServletActionContext.getRequest();

HttpServletResponse response = ServletActionContext.getResponse();

String selectName = new String(request.getParameter("selectName").getBytes("iso-8859-1"),"utf-8");//用request获取URL传递的中文参数,防止乱码

response.setCharacterEncoding("utf-8");

PrintWriter out = response.getWriter();

if (!selectName.equals("")) {

historyEvent = historyEventService.getHistoryEventByName(projectId, selectName);//获取对象

response.setContentType("application/json; charset=utf-8");

JSONObject responseJSONObject = JSONObject.fromObject(historyEvent); //将实体对象转换为JSON Object转换

out.print(responseJSONObject.toString());

out.flush();

out.close();

}

} catch (Exception e) {

e.printStackTrace();

}