接口开发

接口开发最基本的是如何获取请求的参数和如何返回查到的数据，参数的格式采用JSON

以struts框架为例

post方式传递json数据参数

public class GetbusinessInformation  extends BaseAction{public ActionForward execute(ActionMapping mapping,ActionForm form,HttpServletRequest request,HttpServletResponse response) throws Exception{JSONObject jsonRequestParam = JSONObject.fromObject(this.getStrResponse(request));JSONObject json = new JSONObject();//返回的JSON数据String requst_code = (String)jsonRequestParam.get("req_code");//请求接口路由识别码    System.out.println(jsonRequestParam.toString());//打印请求参数    if(StringUtils.equals("001", requst_code)){    json = ...................//此处调用具体的实现方法    }    if(StringUtils.equals("002", requst_code)){    json = ...................//此处调用具体的实现方法    }    ...........................    System.out.println(json.toString());//打印输出参数    response.setCharacterEncoding("UTF-8");    response.getWriter().write(json.toString());    response.getWriter().flush();    response.getWriter().close();    return null;    }}

//获取请求体中的数据  public String getStrResponse(HttpServletRequest request) throws IOException{  int contentLength = request.getContentLength();    if(contentLength<0){    return null;    }byte buffer[] = new byte[contentLength];for (int i = 0; i < contentLength;) {int len = request.getInputStream().read(buffer, i, contentLength - i);if (len == -1) {break;}i += len;         }return new String(buffer, "utf-8");    }

get方式传递参数，可直接用request.getParameter("参数名")获取。