SpringMVC构建REST接口:第七篇 控制层实现
SpringMVC构建REST接口的控制层，是整个接口的最顶层，也就是直接暴露给用户。
在这层，对调用者身份以及对传入的参数进行验证，以及返回参数的组织。
我喜欢对象，不喜欢以一个个的参数，再说我们用jackjson自动进行对象实例和Json的转换，所以我们需要输入输出参数的对象集。 由于目前SpringMVC对控制层的方法参数不支持泛型，所以我们需要在com.jiahe.rest.demo2.requestmodels建立相对应的请求参数对象；而输出可以使用泛型。
一、输入参数组织
依次在com.jiahe.rest.demo2.requestmodels建立接口请求的头部对象和DishesCook的请求对象。
1、接口请求的头部对象Header
public class Header implements Serializable {
private static final long serialVersionUID = 1L;
private String ck; //给予调用者的，根据项目制定标准
private String v;//调用登陆接口后的返回值，根据项目制定标准
...ToAdd get/set 利用Eclipse生产各个属性的get\set
...ToAdd toString() 利用Eclipse生产实例的字符串转换
...ToAdd Constructors from super 利用Eclipse生产默认构造函数
...ToAdd Constructor use fields 利用Eclipse生产全字段的构造函数
}2、DishesCook的请求对象
public class DishesCookReauest implements Serializable {
private static final long serialVersionUID = 1L;
private Header header;//求情头
...ToAdd get/set 利用Eclipse生产各个属性的get\set
...ToAdd toString() 利用Eclipse生产实例的字符串转换
...ToAdd Constructors from super 利用Eclipse生产默认构造函数
...ToAdd Constructor use fields 利用Eclipse生产全字段的构造函数
}二、输出参数组织
输出的Json，我们采用{"data":"","message":"",status:0}格式，因此需要在com.jiahe.rest.demo2.responseModels建立一个对应的泛型对象。
public class ResultData<T> implements Serializable {
private static final long serialVersionUID = 1L;
private int status;//返回 0：失败；1：成功
private T data;//具体的对象
private String message;//错误时消息
...ToAdd get/set 利用Eclipse生产各个属性的get\set
...ToAdd toString() 利用Eclipse生产实例的字符串转换
...ToAdd Constructors from super 利用Eclipse生产默认构造函数
...ToAdd Constructor use fields 利用Eclipse生产全字段的构造函数
}三、DishesCook控制层实现
1、在package com.jiahe.rest.demo2.controller下添加类DishesCookController
2、其余和《SpringMVC构建REST接口:第四篇 第一个REST风格的接口》基本相同，下面是代码
@Controller
@RequestMapping("/dishescook")
public class DishesCookController {
@Autowired
private DishesCookService dishesCookService;
/**
* add 增加一个DishesCook
* http://localhost:8080/demo2/dishescook/add
* @param requestData
* @param mode
* @param response
* @return
* @throws IOException
*/
@RequestMapping(value = "/add", method = RequestMethod.POST)
@ResponseBody
public ResultData<DishesCook> add(@RequestBody DishesCookRequest requestData,
Model mode, HttpServletResponse response) throws IOException {
ResultData<DishesCook> resultData =new ResultData<DishesCook>();
resultData.setStatus(0);
resultData.setData(null);
if (requestData==null) {
resultData.setMessage("参数错误：没有传入参数");
} else {
//身份验证处理
try {
int i=dishesCookService.insert(requestData.getDishesCook());
if (i==1){
resultData.setStatus(1);
resultData.setMessage("添加成功");
} else {
resultData.setMessage("添加失败");
}
} catch (Exception e) {
resultData.setMessage("添加失败:"+e.getMessage());
}
}
return resultData;
}
/**
* update 修改一个DishesCook
* http://localhost:8080/demo2/dishescook/update
* @param requestData
* @param mode
* @param response
* @return
* @throws IOException
*/
@RequestMapping(value = "/update", method = RequestMethod.POST)
@ResponseBody
public ResultData<DishesCook> update(@RequestBody DishesCookRequest requestData,
Model mode, HttpServletResponse response) throws IOException {
ResultData<DishesCook> resultData =new ResultData<DishesCook>();
resultData.setStatus(0);
resultData.setData(null);
if (requestData==null) {
resultData.setMessage("参数错误：没有传入参数");
} else {
//身份验证处理
try {
int i=dishesCookService.update(requestData.getDishesCook());
if (i==1){
resultData.setStatus(1);
resultData.setMessage("修改成功");
} else {
resultData.setMessage("修改失败");
}
} catch (Exception e) {
resultData.setMessage("修改失败:"+e.getMessage());
}
}
return resultData;
}
/**
* deleteByID 删除一个DishesCook
* http://localhost:8080/demo2/dishescook/deletebyid
* @param requestData
* @param mode
* @param response
* @return
* @throws IOException
*/
@RequestMapping(value = "/deletebyid", method = RequestMethod.POST)
@ResponseBody
public ResultData<DishesCook> deleteByID(@RequestBody DishesCookRequest requestData,
Model mode, HttpServletResponse response) throws IOException {
ResultData<DishesCook> resultData =new ResultData<DishesCook>();
resultData.setStatus(0);
resultData.setData(null);
if (requestData==null) {
resultData.setMessage("参数错误：没有传入参数");
} else {
//身份验证处理
try {
int i=dishesCookService.deleteByID(requestData.getDishesCook());
if (i==1){
resultData.setStatus(1);
resultData.setMessage("删除成功");
} else {
resultData.setMessage("删除失败");
}
} catch (Exception e) {
resultData.setMessage("删除失败:"+e.getMessage());
}
}
return resultData;
}
@RequestMapping(value = "/deletebycondition", method = RequestMethod.POST)
@ResponseBody
public ResultData<DishesCook> deleteByCondition(@RequestBody DishesCookRequest requestData,
Model mode, HttpServletResponse response) throws IOException {
ResultData<DishesCook> resultData =new ResultData<DishesCook>();
resultData.setStatus(0);
resultData.setData(null);
if (requestData==null) {
resultData.setMessage("参数错误：没有传入参数");
} else {
//身份验证处理
try {
int i=dishesCookService.deleteByCondition(requestData.getDishesCook());
if (i==1){
resultData.setStatus(1);
resultData.setMessage("删除成功");
} else {
resultData.setMessage("删除失败");
}
} catch (Exception e) {
resultData.setMessage("删除失败:"+e.getMessage());
}
}
return resultData;
}
@RequestMapping(value = "/findbyid", method = RequestMethod.POST)
@ResponseBody
public ResultData<DishesCook> findByID(@RequestBody DishesCookRequest requestData,
Model mode, HttpServletResponse response) throws IOException {
ResultData<DishesCook> resultData =new ResultData<DishesCook>();
resultData.setStatus(0);
resultData.setData(null);
if (requestData==null) {
resultData.setMessage("参数错误：没有传入参数");
} else {
//身份验证处理
try {
DishesCook dishesCook =dishesCookService.findByID(requestData.getDishesCook());
resultData.setStatus(1);
resultData.setData(dishesCook);
} catch (Exception e) {
resultData.setMessage("查询失败:"+e.getMessage());
}
}
return resultData;
}
@RequestMapping(value = "/findbycondition", method = RequestMethod.POST)
@ResponseBody
public ResultData<List<DishesCook>> findByCondition(@RequestBody DishesCookRequest requestData,
Model mode, HttpServletResponse response) throws IOException {
ResultData<List<DishesCook>> resultData =new ResultData<List<DishesCook>>();
resultData.setStatus(0);
resultData.setData(null);
if (requestData==null) {
resultData.setMessage("参数错误：没有传入参数");
} else {
//身份验证处理
try {
List<DishesCook> dishesCookList =dishesCookService.findByCondition(requestData.getDishesCook());
resultData.setStatus(1);
resultData.setData(dishesCookList);
} catch (Exception e) {
resultData.setMessage("查询失败:"+e.getMessage());
}
}
return resultData;
}
@RequestMapping(value = "/findcountbycondition", method = RequestMethod.POST)
@ResponseBody
public ResultData<Long> findCountByCondition(@RequestBody DishesCookRequest requestData,
Model mode, HttpServletResponse response) throws IOException {
ResultData<Long> resultData =new ResultData<Long>();
resultData.setStatus(0);
resultData.setData(null);
if (requestData==null) {
resultData.setMessage("参数错误：没有传入参数");
} else {
//身份验证处理
try {
Long l =dishesCookService.findCountByCondition(requestData.getDishesCook());
resultData.setStatus(1);
resultData.setData(l);
} catch (Exception e) {
resultData.setMessage("查询失败:"+e.getMessage());
}
}
return resultData;
}
}
身份验证处理,没有处理，有很多方法进行处理，根据项目情况实现它.
注意：1、每个action的请求方式都使用的method = RequestMethod.POST,是为了统一调用。
2、控制层，主要注意各种注解。
源代码：http://download.csdn.net/detail/lxhjh/5435319