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These are the user uploaded subtitles that are being translated: 1 1 00:00:01,271 --> 00:00:02,208 In this video 2 2 00:00:02,208 --> 00:00:04,359 we're gonna learn how to inject values 3 3 00:00:04,359 --> 00:00:06,276 from a properties file. 4 4 00:00:09,912 --> 00:00:11,580 Alright, so in the previous videos 5 5 00:00:11,580 --> 00:00:13,636 we learnt how to inject literal values, 6 6 00:00:13,636 --> 00:00:16,326 so we could inject an email address in the team. 7 7 00:00:16,326 --> 00:00:18,162 The only problem is that those values 8 8 00:00:18,162 --> 00:00:20,908 were hard coded in the config file 9 9 00:00:20,908 --> 00:00:22,714 and what we'd like to do is be able to read 10 10 00:00:22,714 --> 00:00:26,005 this information from our properties file. 11 11 00:00:26,005 --> 00:00:28,318 So, we'll have an external properties file, 12 12 00:00:28,318 --> 00:00:29,839 we'll have our values there 13 13 00:00:29,839 --> 00:00:32,691 and then we'll be able to read the email address 14 14 00:00:32,691 --> 00:00:36,024 and team name from this properties file. 15 15 00:00:37,190 --> 00:00:38,539 Alright, again, you know how I love 16 16 00:00:38,539 --> 00:00:40,810 my step-by-step process, 17 17 00:00:40,810 --> 00:00:42,947 so the first thing we're gonna have to do here 18 18 00:00:42,947 --> 00:00:45,216 is create the properties file, 19 19 00:00:45,216 --> 00:00:47,541 then we'll load the properties file 20 20 00:00:47,541 --> 00:00:49,842 into the Spring config file 21 21 00:00:49,842 --> 00:00:51,651 and then finally in step three 22 22 00:00:51,651 --> 00:00:55,818 we'll reference those values from the properties file. 23 23 00:00:59,901 --> 00:01:01,711 Alright, so let's go ahead and look at step one, 24 24 00:01:01,711 --> 00:01:03,250 creating a properties file, right. 25 25 00:01:03,250 --> 00:01:04,094 Very simple. 26 26 00:01:04,094 --> 00:01:05,795 Simply open a text editor, 27 27 00:01:05,795 --> 00:01:08,279 create a file, in this case, sport.properties 28 28 00:01:08,279 --> 00:01:10,541 and you simply give the name value pairs. 29 29 00:01:10,541 --> 00:01:12,788 So, the name of the property is foo.email 30 30 00:01:12,788 --> 00:01:15,478 and the value is myeasycoach. 31 31 00:01:15,478 --> 00:01:16,792 The actual property names, 32 32 00:01:16,792 --> 00:01:18,531 you can give any name that you want. 33 33 00:01:18,531 --> 00:01:19,807 There's no direct relation 34 34 00:01:19,807 --> 00:01:21,319 to your actual bean. 35 35 00:01:21,319 --> 00:01:25,942 You can call them foo bar, test, funny, bozo, anything. 36 36 00:01:25,942 --> 00:01:28,382 The only thing is that you simply have to be consistent 37 37 00:01:28,382 --> 00:01:30,958 between referring to the property name 38 38 00:01:30,958 --> 00:01:33,630 in this config file and also referring to the property name 39 39 00:01:33,630 --> 00:01:35,380 in your Spring setup. 40 40 00:01:39,083 --> 00:01:40,522 Alright, so those are our properties. 41 41 00:01:40,522 --> 00:01:43,078 Now step two is loading the properties file 42 42 00:01:43,078 --> 00:01:44,518 in the Spring config, 43 43 00:01:44,518 --> 00:01:47,091 so in your application context.xml 44 44 00:01:47,091 --> 00:01:50,590 you simply make use of this context:property-placeholder, 45 45 00:01:50,590 --> 00:01:52,023 you give the location for it, 46 46 00:01:52,023 --> 00:01:54,655 so in this case the file will be on our classpath, 47 47 00:01:54,655 --> 00:01:56,536 and then you give the actual file name, 48 48 00:01:56,536 --> 00:01:57,825 so in this example 49 49 00:01:57,825 --> 00:02:01,094 our properties file's called sport.properties 50 50 00:02:01,094 --> 00:02:03,634 and so I'll actually load that properties file 51 51 00:02:03,634 --> 00:02:05,296 into memory and then you can use it 52 52 00:02:05,296 --> 00:02:07,879 within this Spring config file. 53 53 00:02:10,579 --> 00:02:12,606 So, now this brings us to step three, 54 54 00:02:12,606 --> 00:02:15,241 referencing the values from the properties file. 55 55 00:02:15,241 --> 00:02:17,210 So, the general syntax is you simply use 56 56 00:02:17,210 --> 00:02:19,055 the dollar sign, curly brace 57 57 00:02:19,055 --> 00:02:21,459 and you give whatever the property name is 58 58 00:02:21,459 --> 00:02:23,491 and then Spring will actually substitute 59 59 00:02:23,491 --> 00:02:26,065 that property value directly there. 60 60 00:02:26,065 --> 00:02:28,143 So, in this case for email address, 61 61 00:02:28,143 --> 00:02:29,729 I simply give value 62 62 00:02:29,729 --> 00:02:33,193 equals dollar sign, curly brace, foo.email, 63 63 00:02:33,193 --> 00:02:35,974 so foo.email's the actual property name 64 64 00:02:35,974 --> 00:02:37,371 from that prop's file 65 65 00:02:37,371 --> 00:02:41,454 and that will include the value of myeasycoach@luv2code. 66 66 00:02:41,454 --> 00:02:44,682 And then here I do a similar thing here for the team. 67 67 00:02:44,682 --> 00:02:48,317 So, I reference that property name foo.team, 68 68 00:02:48,317 --> 00:02:49,765 and again, based on information 69 69 00:02:49,765 --> 00:02:51,370 from the properties file 70 70 00:02:51,370 --> 00:02:52,538 it will actually put in the value 71 71 00:02:52,538 --> 00:02:55,537 of Royal Challengers Bangalore. 72 72 00:02:55,537 --> 00:02:56,462 So, that's basically it 73 73 00:02:56,462 --> 00:02:58,847 and you can add additional props in there as you like 74 74 00:02:58,847 --> 00:03:00,026 and simply reference them. 75 75 00:03:00,026 --> 00:03:02,323 So, the key item here is that you reference 76 76 00:03:02,323 --> 00:03:06,057 those values using the dollar sign, curly brace, 77 77 00:03:06,057 --> 00:03:08,881 and then whatever that property name is. 78 78 00:03:08,881 --> 00:03:10,411 Alright, so good stuff here. 79 79 00:03:10,411 --> 00:03:13,200 In the next video we're gonna dive into Eclipse 80 80 00:03:13,200 --> 00:03:15,135 and we'll actually write this code. 81 81 00:03:15,135 --> 00:03:17,635 Alright, so I'll see you then. 6764