Collection properties of spring beans

Spring provides special configuration element tags for the basic collection types set, list, map, and Properties. Among them, Properties can be regarded as a special case of Map. Both the key and value of Map can be objects, but the KEY and value of Properties can only be strings.

<!-- Collection properties -->

           < bean id = "world4" class = "com.modle.World" >

               <!----> < property name = "sprotsList" >

                    < list >

                    < value > 红警 </ value >

                    < value > 战地 </ value >

                    < value > fifa </ value >

                    </ list >

               </ property >

               < property name = "set" >

               < set >

                    < value > 123 </ value >

                    < value > 124 </ value >

                    < value > 125 </ value >

               </ set >

               </ property >

               < property name = "map" >

                    < map >

                         < entry >

                              < key >< value > ab </ value ></ key >

                              < value > ac </ value >

                         </ entry >

                         < entry >

                              < key >< value > abc </ value ></ key >

                              < value > acd </ value >

                         </ entry >

                    </ map >

               </ property >

               < property name = "properties" >

               < props >

                    < prop key = "key1" > com1 </ prop >

                    < prop key = "key2" > com2 </ prop >

               </ props >

                   

               </ property >

           </ bean >