可以在jdbc.properties中配置两个数据连接资源，然后在spring-mybatis.xml配置文件中对两个数据库资源进行分别配置，同时映射对应得dao以及mapping文件 注意：两个数据资源对应的包最好路径不一样：
方式一：使用@ResponseBody注解方式
@ResponseBody @RequestMapping(value="getOrgTreeListStepbystep") public Map<String,Object> queryRegion(String orgid,String firstload){ Map<String,Object> map = new HashMap<String,Object>(); map.put("data", “数据”); return map; }方式二：使用JsonUtil工具类
@RequestMapping(value="/getModelList",method = RequestMethod.POST) public void getModelList(HttpServletRequest request,HttpServletResponse response,String pageno) { Page page = new Page(Integer.parseInt(pageno), 12, modelService.ModelTotal()); int pagenum =page.getPageno(); int size =page.getPagesize(); List<ModelBean> list = modelService.getModelList(pagenum, size); page.setPagelist(list); JsonUtil out = new JsonUtil(request,response); out.outObjString(page); }JsonUtil工具类
package com.qx.util; import java.io.IOException; import java.io.PrintWriter; import java.util.ArrayList; import java.util.List; import java.util.Map; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import com.google.gson.Gson; public class JsonUtil { public JsonUtil(HttpServletRequest request,HttpServletResponse response){ this.request = request; this.response = response; } /** 当前HttpServletRequest */ protected HttpServletRequest request; /** 当前HttpServletResponse */ protected HttpServletResponse response; protected PrintWriter writer; public PrintWriter getWriter() { try { writer = response.getWriter(); } catch (IOException e) { e.printStackTrace(); } return writer ; } public void setWriter(PrintWriter writer) { this.writer = writer; } public HttpServletRequest getRequest() { return request; } public void setRequest(HttpServletRequest request) { this.request = request; } public HttpServletResponse getResponse() { return response; } public void setResponse(HttpServletResponse response) { this.response = response; } // JSON private void setJsonHeader(){ HttpServletResponse r =getResponse(); r.setContentType("application/json;charset=UTF-8"); r.setHeader("Cache-Control", "no-cache, no-store, must-revalidate"); // HTTP 1.1. r.setHeader("Pragma", "no-cache"); // HTTP 1.0. r.setDateHeader("Expires", 0); // Proxies. } /** * 警告：请不要直接使用此函数，防止产生缓存问题 * 请考虑使用outObjString **/ public void outString(String str) { try { PrintWriter out = getResponse().getWriter(); out.print(str); //System.out.println(str); } catch (IOException e) { e.printStackTrace(); } } public void outJson(String str) { setJsonHeader(); outString(str); } @SuppressWarnings("rawtypes") public void outListString(List list) { if(list == null) list = new ArrayList(); setJsonHeader(); String jsonString = "{\"success\":true,\"total\":" + list.size() + ",\"data\":" + new Gson().toJson(list) + "}"; outString(jsonString); } @SuppressWarnings("rawtypes") public void outDelOrInListString(List tripList,List list) { if(list == null) list = new ArrayList(); setJsonHeader(); String jsonString = "{\"success\":true,\"total\":" + list.size() + ",\"data\":" + new Gson().toJson(tripList) + ",\"deleteTrip\":" + new Gson().toJson(list) + "}"; outString(jsonString); } @SuppressWarnings("rawtypes") public void outComboString(List list) { setJsonHeader(); String jsonString = null; if(list==null||list.isEmpty()){ jsonString = "{total:" + 0 + ",root:}"; }else{ jsonString = "{total:" + list.size() + ",root:" + new Gson().toJson(list) + "}"; } outString(jsonString); } @SuppressWarnings("rawtypes") public void outListStringToJSON(List list) { setJsonHeader(); String jsonString = "{\"total\":" + list.size() + ",\"root\":" + new Gson().toJson(list) + "}"; outString(jsonString); } @SuppressWarnings("rawtypes") public void outQueryDate(List list) { setJsonHeader(); String jsonString = "{\"success\":true,\"data\":" + new Gson().toJson(list) + "}"; System.out.println(jsonString); outString(jsonString); } public void outObjString(Object obj) { setJsonHeader(); String jsonString = "{\"success\":true,\"data\":" + new Gson().toJson(obj) + "}"; outString(jsonString); } @SuppressWarnings("rawtypes") public void outTreeJsonList(List list) { getResponse().setContentType("application/xml;charset=UTF-8"); outString(new Gson().toJson(list)); System.out.println(new Gson().toJson(list)); } @SuppressWarnings("rawtypes") public void outMapToJson(Map map) { setJsonHeader(); String jsonString = "{\"success\":true,\"data\":" + new Gson().toJson(map) + "}"; // System.out.println(jsonString); outString(jsonString); } }