Spring mvc Controller 处理安卓post和get请求

@Controller
@RequestMapping ("/MyController")
public class MyController {

@RequestMapping ("/test")
@ResponseBody
public String download (HttpServletRequest request)
{
String pathname = request.getParameter("a");
String filename = request.getParameter("b");
return pathname+";"+filename;
}

@RequestMapping (value = "/test1",method = RequestMethod.GET)
@ResponseBody
public Map<String, Object> download1 (HttpServletRequest request)
{
String pathname = request.getParameter("a");
String filename = request.getParameter("b");
HashMap hashMap = new HashMap();
hashMap.put("a", pathname);
hashMap.put("b", filename);
return hashMap;
}

@RequestMapping (value ="/test2",method = RequestMethod.POST)
@ResponseBody
public Map<String, Object> download2 (HttpServletRequest request)
{
Map<String, Object> httpToMap = HttpToMap(request);
if(httpToMap== null) {
httpToMap = new HashMap<String,Object>();
httpToMap.put("error", "没有数据");
}
return httpToMap;

}

@RequestMapping (value ="/test3",method = RequestMethod.POST)
@ResponseBody
public Map<String, Object> download3 (HttpServletRequest request)
{
try {
request.setCharacterEncoding("utf-8");
} catch (UnsupportedEncodingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
String parameter = request.getParameter("a");
return null;

}

StudentDAO studentDAO = new StudentDAO();//调用登陆判断方法

@RequestMapping(value="/doLogin/{username}/{password}",method=RequestMethod.GET)
@ResponseBody
public Map<String, Object> getTeacher(@PathVariable("username") Integer username, @PathVariable("password") String password){
System.out.println("拦截了客户端json请求");
Map<String, Object> map = new HashMap<String, Object>();

System.out.println("密码错误");
map.put("result", "密码错误");
return map; //封装为json返回给客户端
}

//********************************************************************************
public Map <String, Object> HttpToMap (HttpServletRequest request)
{
Map <String, Object> map;
try
{
JSONObject jsonObject = HttpToJson (request);
map = getMap (jsonObject);
}
catch (Exception e)
{
map = null;
}
return map;

}

public JSONObject HttpToJson (HttpServletRequest request)
{
JSONObject jsonObject;
BufferedReader reader = null;
try
{
reader = new BufferedReader (new InputStreamReader (request.getInputStream (), "utf-8"));
String jsonStr = null;
StringBuilder result = new StringBuilder ();
while ((jsonStr = reader.readLine ()) != null)
{
result.append (jsonStr);
}
jsonObject = JSONObject.parseObject (result.toString ()); // 取一个json转换为对象
}
catch (Exception e)
{
jsonObject = null;
}
finally
{
if (null != reader)
{
try
{
reader.close ();
}
catch (IOException e)
{
//LOGGER.error ("Close reader error : ", e);
} // 关闭输入流
}
}
return jsonObject;
}

private Map <String, Object> getMap (JSONObject jsonObject)
{
Map <String, Object> map = new HashMap <String, Object> ();
for (Iterator <String> keyIter = jsonObject.keySet ().iterator (); keyIter.hasNext ();)
{
String key = (String) keyIter.next ();

if (jsonObject.get (key).getClass ().equals (JSONObject.class))
{
Map <String, Object> map2;
map2 = getMap (jsonObject.getJSONObject (key));
map.put (key, map2);
}
else if (jsonObject.get (key).getClass ().equals (JSONArray.class))
{
List <Map <String, Object>> list;
list = getList (jsonObject.getJSONArray (key));
map.put (key, list);
}
else
{
map.put (key, jsonObject.get (key));
}
}

return map;
}

private List <Map <String, Object>> getList (JSONArray jsonArray)
{
List <Map <String, Object>> list = new ArrayList<> ();
for (int i = 0; i < jsonArray.size (); i++)
{
Map <String, Object> map2;
map2 = getMap (jsonArray.getJSONObject (i));
list.add (map2);
}
return list;
}

}

以上代码:

MyController 类之前加入注解

@Controller 声明是controller层

@RequestMapping ("/MyController") 该controller层目录结构 访问路径   ip:端口号/工程名称/MyController/

1.get请求

@RequestMapping ("/test")
@ResponseBody
public String download (HttpServletRequest request)
{
String pathname = request.getParameter("a");
String filename = request.getParameter("b");
return pathname+";"+filename;
}

访问路径为:

ip:端口号/工程名称/MyController/test?a=username&b=passworld

get请求内容在请求头上,拼接在url后面

如果不声明请求方式默认为get请求,所以 test和test1请求是等效的

StudentDAO studentDAO = new StudentDAO();//调用登陆判断方法

@RequestMapping(value="/doLogin/{username}/{password}",method=RequestMethod.GET)
@ResponseBody
public Map<String, Object> getTeacher(@PathVariable("username") Integer username, @PathVariable("password") String password){
System.out.println("拦截了客户端json请求");
Map<String, Object> map = new HashMap<String, Object>();

System.out.println("密码错误");
map.put("result", "密码错误
9116
");
return map; //封装为json返回给客户端
}

这种方式自定义格式

访问路径为:

ip:端口号/工程名称/MyController/doLogin/username/passworld

就可以得到 username 和passworld字段


2.post请求
post请求请求的内容通过http body部分发送

@RequestMapping (value ="/test2",method = RequestMethod.POST)
@ResponseBody
public Map<String, Object>  download2 (HttpServletRequest request)
{
Map<String, Object> httpToMap = HttpToMap(request);
if(httpToMap== null) {
httpToMap = new HashMap<String,Object>();
httpToMap.put("error", "没有数据");
}
return httpToMap;

}

这里通过request拿到流对象,再转换成String -->Json -->Map  参考工具方法:HttpToMap,HttpToJson,getMap,getList方法

以上方法亲测可用
test3,本来

 request.getParameter("key值"),可以拿到json的值,或者

request.getParameterMap可以拿到集合 这里一直拿到空(待研究)