The use of Spring MVC for @initbinder data binding

Javabean

Platformuser.java

@Entity @table (name =  "Dsm_user") public class platformuser extends dsmobject  {@Id @generatedvalue (strategy = generationtype.auto) @Columnprivate  integer userid;@ columnprivate string username; @Columnprivate  String password; @Columnprivate  string  work_id; @ManyToOne (Cascade = cascadetype.merge, fetch = fetchtype.eager) @ Joincolumn (name =  "org_id") private platformorganization org_id;//  eager to load, Load the user information while loading the role information @manytomany (Fetch = fetchtype.eager) @JoinTable (name =  "Dsm_user_role",  joinColumns = {  @JoinColumn (name =  "userid")  }, inversejoincolumns  = {  @JoinColumn (name =  "rid")  }) private set<platformrole> roles  = new HashSet<> (); @Columnprivate  String telephone;public Integer  GetUserid ()  {return userid;} Public vOid setuserid (Integer userid)  {this.userid = userid;} Public string getusername ()  {return username;} Public void setusername (String username)  {this.username = username;} Public string getpassword ()  {return password;} Public void setpassword (String password)  {this.password = password;} Public set<platformrole> getroles ()  {return roles;} Public void setroles (Set<platformrole> roles)  {this.roles = roles;} PUBLIC&NBSP;STRING&NBSP;GETWORK_ID ()  {return work_id;} public void setwork_id (string work_id)  {this.work_id = work_id;} PUBLIC&NBSP;PLATFORMORGANIZATION&NBSP;GETORG_ID ()  {return org_id;} public void setorg_id (platformorganization org_id)  {this.org_id = org_id;} Public string gettelephone ()  {return telephone;} Public&nBsp;void settelephone (String telephone)  {this.telephone = telephone;} Public platformuser ()  {}}

Platformrole.java

@Entity @table (name =  "Dsm_role") public class platformrole extends dsmobject  {@Id @generatedvalue (strategy = generationtype.auto) @Columnprivate  integer role_id;@ columnprivate string role_name; @Columnprivate  Integer role_class; @ManyToMany (mappedby  =  "Roles", Fetch = fetchtype.eager) private set<platformuser> users =  new HashSet<> ();//  eager to load, at the same time the management role can load the appropriate permissions @manytomany (Fetch = fetchtype.eager) @ Jointable (name =  "Dms_role_pri", joincolumns = {  @JoinColumn (name =  " Rid ")  }, inverseJoinColumns = {  @JoinColumn (name = " pid ")  }) Private &NBSP;SET&LT;PLATFORMPRIVILEGE&GT;&NBSP;PRIS;PUBLIC&NBSP;INTEGER&NBSP;GETROLE_ID ()  {return role_id;} public void setrole_id (integer role_id)  {this.role_id = role_id;} Public string getrole_name () &NBSp {return role_name;} Public void setrole_name (String role_name)  {this.role_name = role_name;} Public integer getrole_class ()  {return role_class;} Public void setrole_class (Integer role_class)  {this.role_class = role_class;} Public platformrole (Integer role_id, string role_name, integer role_class)   {Super ();this.role_id = role_id;this.role_name = role_name;this.role_class =  Role_class;} Public platformrole ()  {}public set<platformuser> getusers ()  {return users;} Public void setusers (Set<platformuser> users)  {this.users = users;} Public set<platformprivilege> getpris ()  {return pris;} Public void setpris (Set<platformprivilege> pris)  {this.pris = pris;}}

User and role are many-to-many relationships.

Bind a user's multiple role information to a checkbox while updating a user

Controller:

@InitBinderpublic  void initbinder (Webdatabinder binder)  throws exception { Binder.registercustomeditor (Set.class, new propertyeditorsupport ()  {@Overridepublic  void  setastext (String text)  {system.out.println (text);// long systeminfoid =  long.valueof (text);// systeminfo systeminfo =// systeminfoservice.findbyid (systemInfoId); String[] roles = text.split (","); Set<platformrole> platformroles = new hashset<> (); platformrole platformrole = null;for  (int i = 0; i <  roles.length; i++)  {platformrole = platformroleservice.findrolebyid (Integer.parseInt (roles [i])); Platformroles.add (platformrole);} System.out.println (Platformrole); SetValue (platformroles);});} /*********** upduser **************/@RequestMapping (value =  "/{user_id}/update",  method =  Requestmethod.get) public string update (@PathVariable  int user_id, model model)  {model.addattribute ("Platformorganization", platformorgservice.findallorg ()); Model.addattribute ("user_id" ,  user_id); Platformuser u = platformuserservice.finduserbyid (USER_ID); Set<platformrole> us = u.getroles (); Model.addattribute (U); List<platformrole> r = platformroleservice.findallrole ();/* * for (int i=0; I<r.size (); i++) { if (R.get (i). getrole_id (). Equals (US))  } */iterator<platformrole> it = us.iterator ();while  (It.hasNext ())  { Platformrole po = it.next (); int itu = po.getrole_id ();for  (int i  = 0; i < r.size ();  i++)  {if  (R.get (i). getrole_id (). Equals (ITU))  { R.set (I,&NBSP;PO);}}} Model.addattribute ("Platformrole",  r);return  "/platform/upduser";} @RequestMapping(value =  "/{user_id}/update",  method = requestmethod.post) public String  Update (@PathVariable  int user_id, platformuser user)  {platformuserservice.updateuser ( User);return  "redirect:/platformindex/users";}

In updateuser.jsp:

<%@ page language= "java"  import= "java.util.*"  pageencoding= "UTF-8"%><%@  taglib prefix= "Form"  uri= "Http://www.springframework.org/tags/form"%><% @taglib  uri= "http ://java.sun.com/jsp/jstl/core " prefix=" C "%><%string path = request.getcontextpath (); String basepath = request.getscheme ()  +  "://" + request.getservername ()  +   ":"  + request.getserverport () + path +  "/";%><! doctype html public  "-//w3c//dtd html 4.01 transitional//en" > 

The use of Spring MVC for @initbinder data binding