springMVC远程接口开发

import java.io.IOException;
import java.io.PrintWriter;
import java.math.BigDecimal;
import java.util.List;

import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

import com.alibaba.fastjson.JSONObject;


/**
 * 安卓端订单管理
 * 
 * @author CNZZ
 *
 */
@Controller
@RequestMapping("/AndroidOrderManage")
public class AndroidOrderManageController {
	private static Logger log = LoggerFactory
			.getLogger(AndroidOrderManageController.class);

	@Resource
	AndroidOrderManageService androidOrderManageService;


	/**
	 * 安卓端订单创建
	 * 
	 * @param request
	 * @param response
	 * @return
	 * @throws Exception
	 */
	@RequestMapping("/createOrder")
	public void createOrder(HttpServletRequest request,
			HttpServletResponse response) throws Exception {
		JSONObject jsonObject = new JSONObject();

		try {
			// 1.入参打印
			String requestJSONStr = request.getParameter("requestJSONStr");
			log.info("安卓端订单创建,requestJSONStr={}", requestJSONStr);

			// 2.入参非空校验
			if (CmUtil.isEmpty(requestJSONStr)) {
				jsonObject.put("code", "-1");
				jsonObject.put("result", "");
				jsonObject.put("messages", "请求参数为空！");
				log.error("安卓端订单创建,请求参数为空,requestJSONStr={}", requestJSONStr);
				doResponse(response, jsonObject.toJSONString());
				return;
			}

			// 3.业务方法
			String orderNum = doCreateOrder(response, jsonObject,
					requestJSONStr);

			if (CmUtil.isEmpty(orderNum)) {
				return;
			}

			// 7.响应
			JSONObject result = new JSONObject();
			result.put("requestJSONStr", requestJSONStr);
			result.put("orderNum", orderNum);

			jsonObject.put("code", "000000");
			jsonObject.put("result", result);
			jsonObject.put("messages", "交易成功");

			doResponse(response, jsonObject.toJSONString());
		} catch (Exception e) {
			jsonObject.put("code", "-1");
			jsonObject.put("result", "");
			jsonObject.put("messages", "系统异常！");
			log.error("安卓端订单创建,系统异常,e={}", e);
			doResponse(response, jsonObject.toJSONString());
		}

	}

	/**
	 * 响应
	 * 
	 * @param response
	 * @param outputStr
	 */
	private void doResponse(HttpServletResponse response, String outputStr) {
		response.setContentType("application/json");
		PrintWriter out = null;
		try {
			out = response.getWriter();
			out.write(outputStr);
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} finally {
			out.flush();
			out.close();
		}
	}
}

其中部分方法和包导入删除过了，为了让流程更加清晰。