Solve the problem of duplicate object binding parameters in spring MVC

HTML page

<formMethod= ' Post 'Action= ' url '>User name<inputtype= ' text 'name= ' name '>User ID<inputtype= ' text 'name= ' id '>Food Name<inputtype= ' text 'name= ' name '>Food ID<inputtype= ' text 'name= ' id '>     <inputtype= ' text 'name= ' age '>     <inputtype= ' text 'name= ' Price '></form>

Entity class

 Public classuser{PrivateString name; PrivateString ID; 　　PrivateInteger age; //Getter and Setter}---------------------------------- Public classfood{PrivateString name; PrivateString ID; PrivateDouble Price, 　　//Getter and Setter}

Controller

@requestMap (value={'/order/book '}) public string Show (User U,food f) {}

in these cases, neither user nor food can get the correct name and ID, or the1. Create an intermediate bridge, split the properties

Establish an intermediate Bridge Userfooddto object

 Public classuserfooddto{PrivateString uid;//User ID 　　 PrivateString uname;//User name 　　 PrivateString FID;//Food ID 　　 PrivateString fname;//Food Name 　　 PrivateDouble Price,//Food prices 　　 PrivateInteger age;//User Age//Getter and Setter}

Modify the name value of the foreground page

<formMethod= ' Post 'Action= ' url '>User ID<inputtype= ' text 'name= ' uid '>User name<inputtype= ' text 'name= ' uname '>Food ID<inputtype= ' text 'name= ' FID '>Food Name<inputtype= ' text 'name= ' fname '> 　　 <inputtype= ' text 'name= ' age '> 　　 <inputtype= ' text 'name= ' Price '></form>

Controller

@requestMapping (value={'/order/book ') public string Show (Userfooddto dto) {  // create user and food instances New  New Food ();    // Set properties individually　　U.setuid (Dto.getuid ()); F.setfid (Dto.getfid ());
U.setname (Dto.getuname ()); 　　F.setname (Dto.getfname ());　　U.setage (Dto.getage);　　F.setprice (Dto.getprice); .....}　　

The downside is that if you have a large amount of data, 10,000 fields, a lot of modifications, and a DTO, it's laborious to split, so it's not recommended to use it in large amounts of data.

2. Splitting conflicting properties using a bridge connection

Front Page

<formMethod= ' Post 'Action= ' url '>User name<inputtype= ' text 'name= ' uname '>User ID<inputtype= ' text 'name= ' uid '>Food Name<inputtype= ' text 'name= ' fname '>Food ID<inputtype= ' text 'name= ' FID '> 　　 <inputtype= ' text 'name= ' age '> 　　 <inputtype= ' text 'name= ' Price '></form>

Intermediate Bridge Class

--- specifically create a JavaBean public Class ufbridge{  private  String uname for conflicting fields;　　 Private  String uid;　　 Private  String fname;  Private  String fid;}

Controller

@requestMapping (value={'/order/book '}) public string Show (User u,food F,ufbridge ufb) {　　U.setid (UFB.GETUID);　　U.setname (Ufb.getuname ());　　F.setid (UFB.GETFID); F.setname (Ufb.getuname ());
}

3. Create a class containing user and food

Vo Object

 Public class　　userfoodvo{  private  user user;　　 Private food food ;  // omit getter and Setter methods }

Front Page

<formMethod= ' Post 'Action= ' url '>User name<inputtype= ' text 'name= ' User.Name '>User ID<inputtype= ' text 'name= ' User.ID '>Food Name<inputtype= ' text 'name= ' Food.name '>Food ID<inputtype= ' text 'name= ' food.id '> 　　 <inputtype= ' text 'name= ' User.age '> 　　 <inputtype= ' text 'name= ' Food.price '></form>

Controller

@requestMapping (value={'/order/book '}) public string Show (Userfoodvo vo) {}

Solve the problem of duplicate object binding parameters in spring MVC