Allow map binding to work with unescaped characters

[yygnay]

Spring boot version： 2.0.2 (1.5.13 is normal)

Problem Description：

If the map key is with “/”, it cannot be parsed normally. Others are normal.

Example：

application.yml 

shiro:
  testMap:
    /test1: test1
    /test2: test2

Configuration class

@Data
@ConfigurationProperties(prefix="shiro")
public class ShiroProperties {
	private Map<String,String> testMap;
}

Test class

@Transactional
@RunWith(SpringRunner.class)
@SpringBootTest(classes=DataManage.class)
public class ShiroTest extends BaseTransactionalTest{

	@Autowired
	private ShiroProperties shiroConfig;
	
	@Test
	public void read() {
		System.out.println(shiroConfig.toString());
	}
	
}

console info：

ShiroProperties(testMap={test1=test1, test2=test2})

[philwebb]

The new binder is much stricter about property names which means you need to surround them in square brackets. Try the following:

shiro:
  testMap:
    "[/test1]": test1
    "[/test2]": test2

[philwebb]

I'm wonder if there's any way we can make this more user friendly. I've flagged the issue for discussion at our next call.

[yygnay]

Thank you! According to your suggestion it can be used normally, I hope there are relevant examples in the official document...

[mbhave]

We might be able to get the original key in the EntryBinder.

[edysli]

This also tripped me up while migrating to 2.0 because I have URLs as keys, something like:

myapp
  serviceUrls:
    'https://example.org/test': 'https://test.example.org/Endpoint'

and it used to work fine with 1.5. After finding this issue, I changed this map to:

'[https://example.org/test]': 'https://test.example.org/Endpoint'

and now it parses correctly. Please document this explicitly in the migration guide or reference doc.