URLDecoder: Illegal hex characters in escape (%) pattern - For input string: "KV"

使用Morphia，连接mongo

Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.mongodb.MongoClient]: Factory method 'mongo' threw exception; nested exception is java.lang.IllegalArgumentException: URLDecoder: Illegal hex characters in escape (%) pattern - For input string: "KV"
	at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:189) ~[spring-beans-4.3.13.RELEASE.jar:4.3.13.RELEASE]
	at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:588) ~[spring-beans-4.3.13.RELEASE.jar:4.3.13.RELEASE]
	... 93 common frames omitted
Caused by: java.lang.IllegalArgumentException: URLDecoder: Illegal hex characters in escape (%) pattern - For input string: "KV"
	at java.net.URLDecoder.decode(URLDecoder.java:194) ~[na:1.8.0_211]
	at com.mongodb.ConnectionString.urldecode(ConnectionString.java:755) ~[mongo-java-driver-3.4.3.jar:na]
	at com.mongodb.ConnectionString.<init>(ConnectionString.java:270) ~[mongo-java-driver-3.4.3.jar:na]
	at com.mongodb.MongoClientURI.<init>(MongoClientURI.java:201) ~[mongo-java-driver-3.4.3.jar:na]
	at org.springframework.boot.autoconfigure.mongo.MongoProperties.createNetworkMongoClient(MongoProperties.java:257) ~[spring-boot-autoconfigure-1.5.9.RELEASE.jar:1.5.9.RELEASE]
	at org.springframework.boot.autoconfigure.mongo.MongoProperties.createMongoClient(MongoProperties.java:208) ~[spring-boot-autoconfigure-1.5.9.RELEASE.jar:1.5.9.RELEASE]
	at org.springframework.boot.autoconfigure.mongo.MongoAutoConfiguration.mongo(MongoAutoConfiguration.java:73) ~[spring-boot-autoconfigure-1.5.9.RELEASE.jar:1.5.9.RELEASE]
	at org.springframework.boot.autoconfigure.mongo.MongoAutoConfiguration$$EnhancerBySpringCGLIB$$8b6ddb1f.CGLIB$mongo$1(<generated>) ~[spring-boot-autoconfigure-1.5.9.RELEASE.jar:1.5.9.RELEASE]
	at org.springframework.boot.autoconfigure.mongo.MongoAutoConfiguration$$EnhancerBySpringCGLIB$$8b6ddb1f$$FastClassBySpringCGLIB$$944b0e6b.invoke(<generated>) ~[spring-boot-autoconfigure-1.5.9.RELEASE.jar:1.5.9.RELEASE]
	at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:228) ~[spring-core-4.3.13.RELEASE.jar:4.3.13.RELEASE]
	at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:358) ~[spring-context-4.3.13.RELEASE.jar:4.3.13.RELEASE]
	at org.springframework.boot.autoconfigure.mongo.MongoAutoConfiguration$$EnhancerBySpringCGLIB$$8b6ddb1f.mongo(<generated>) ~[spring-boot-autoconfigure-1.5.9.RELEASE.jar:1.5.9.RELEASE]
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_211]
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_211]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_211]
	at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_211]
	at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:162) ~[spring-beans-4.3.13.RELEASE.jar:4.3.13.RELEASE]
	... 94 common frames omitted

原因，因为url地址中，有一个 % ,需要对 % 进行转化，将 % 替换为 %25