`var obj=$resource('url?action=:act');`
 `obj.$save{act:'save'}`

 var obj=`$resource`('url?action=:act',{
 act:'save',
 a:'1',
 b:'2'
 });

 var boj=$resource('url?action=:act',{
 ...
 },{
 a:{
 method:'get'
 }
 });

 var obj=$resource('url');
 //get()方法
 obj.get(params,successFn,errorFn);
 //query方法
 obj.query(params,successFn,errorFn);

 var obj=$resource('url');
 //save()方法
 obj.save(params,postData,successFn,errorFn);
 //delete方法
 obj.save(params,postData,successFn,errorFn);
 //remove方法
 obj.save(params,postData,successFn,errorFn);

 <div ng-controller='myController'>
 <ul>
 <li ng-repeat='item in items'>
 <span>{{item.Code}}</span>
 <span>{{item.Name}}</span>
 <span>{{item.Gender}}</span>
 </li>
 </ul>
 <div>
 Key: <input type="text" ng-model='key' />
 <button ng-click='save()'>保存</button>
 <div>{{result}}</div>
 </div>
 </div>
 <script type="text/javascript">
 angular.module('myapp',['ngResource'])
 .config(function($httpProvider){
 $httpProvider.defaults.transformRequest=function(obj){
 var arrStr=[];
 for(var p in obj){
  arrStr.push(encodeURIComponent(p)+"="+encodeURIComponent(obj[p]));
 }
 return arrStr.join("&");
 };
 $httpProvider.defaults.headers.post={
  'Content-Type':'application/x-www-form-urlencoded'
 }
 })
 .controller('myController',['$scope','$resource',function($scope,$resource){
 var stus=$resource('/info');
 ///info?action=search
 stus.query({action:'search'},function(resp){
  $scope.items=resp;
 });
 $scope.save=function(){
  var data={
  key:$scope.key
  };
  stus.save({action:'save'},data,function(resp){
  $scope.result=(resp[0]=='1')?'保存成功':"保存失败";
  });
 }
 }])
 </script>

 //对于query请求
 app.get('/info',function(req,res){
 var info=[
 {Code:'1001',Name:'zhangsan',Gender:'female'},
 {Code:'1002',Name:'lisi',Gender:'male'}
 ];
 res.status(200).json(info);
 });
 //对于save请求
 app.post('/info',function(req,res){
 if(req.body.key=='1001'){
 res.send('1');
 }else{
 res.send('0')
 }
 });

 <div ng-controller='myController'>
 <div>
 <div>{{r0}}</div>
 <div>{{r1}}</div>
 <div>{{r2}}</div>
 <button ng-click='click()'>开始</button>
 </div>
 </div>
 <script type="text/javascript">
 var url='/self?action=:act';
 angular.module('myapp',['ngResource'])
 .config(function($httpProvider){
 $httpProvider.defaults.transformRequest=function(obj){
 var arrStr=[];
 for(var p in obj){
  arrStr.push(encodeURIComponent(p)+"="+encodeURIComponent(obj[p]));
 }
 return arrStr.join("&");
 };
 $httpProvider.defaults.headers.post={
  'Content-Type':'application/x-www-form-urlencoded'
 }
 })
 .factory('custom',['$resource',function($resource){
 return $resource(url,{act:'search'},
  {
   update:{
   method:'POST',//使用POST方式请求服务器
   params:{
   update:true
   },
   isArray:false //表示调用该方法后，服务器返回的数据可以不是一个数组
   }
  });
 }])
 .controller('myController',['$scope','custom',function($scope,custom){
 $scope.click=function(){
  //这里的id是放在url后面的，/self?action=search&id=1001
  custom.get({id:'1001'},function(resp0){
  $scope.r0=(resp0[0]=='1')?'查找成功':'查找失败';
  resp0.key='1001';
  // /self?action=update&update=true
  resp0.$update({act:'update'},function(resp1){
  $scope.r1=(resp0[0]=='1')?'更新成功':'更新失败';
  //这里的key是放在数据body体里面的
  resp1.key='1002';
  //self?action=save
  resp1.$save({act:'save'},function(resp2){
  $scope.r2=(resp0[0]=='1')?'保存成功':'保存失败';
  })
  })
  })
 }
 }])
 </script>

 // /self?action=search&id=1001
 app.get('/self',function(req,res){
 if(req.query.action=='search'){
 console.log('req.params.id:'+req.params.id);
 if(req.query.id=='1001'){
 res.send('1');
 }else{
 res.send('0');
 }
 }
 });

 // /self?action=update&update=true /self?action=save
 app.post('/self',function(req,res){
 if(req.query.action=='update'){
 if(req.body.key=='1001' && req.query.update=='true'){
 res.send('1');
 }else{
 res.send('0');
 }
 }else if(req.query.action=='save'){
 if(req.body.key=='1002'){
 res.send('1');
 }else{
 res.send('0');
 }
 }
 })