fixes #740 check escape backslash before appy quoteReplacement config

config/src/main/java/com/networknt/config/ConfigInjection.java

@@ -70,7 +70,12 @@ public static Object getInjectValue(String string) {
             if (!(value instanceof String)) {
                 return value;
             }
-            m.appendReplacement(sb, m.quoteReplacement((String)value));
+            String valueStr = (String)value;
+            if(valueStr.contains("\\")) {
+                m.appendReplacement(sb, (String)value);
+            } else {
+                m.appendReplacement(sb, m.quoteReplacement((String)value));
+            }
         }
         return m.appendTail(sb).toString();
     }

config/src/test/java/com/networknt/config/ConfigEscapeTest.java

@@ -34,4 +34,17 @@ public void testValuesEscape() {
         Map<String, Object> passwordMap = Config.getInstance().getJsonMapConfigNoCache("password");
         Assert.assertEquals("def$g", passwordMap.get("value"));
     }
+
+    @Test
+    public void testSql1() {
+        Map<String, Object> passwordMap = Config.getInstance().getJsonMapConfigNoCache("password");
+        Assert.assertEquals("SELECT JSON_VALUE(abc, '$.foo.bar') FROM def", passwordMap.get("sql1"));
+    }
+
+    @Test
+    public void testSql2() {
+        Map<String, Object> passwordMap = Config.getInstance().getJsonMapConfigNoCache("password");
+        Assert.assertEquals("SELECT JSON_VALUE(abc, '$.foo.bar') FROM def", passwordMap.get("sql2"));
+    }
+
 }

config/src/test/resources/config/password.yml

@@ -2,3 +2,5 @@
 # the config file not loaded properly. This is to reproduce the issue and get it fixed.
 password: ${password:abc$defg}
 value: ${password.escapeValue:abc$defg}
+sql1: ${password.sql1:SELECT}
+sql2: ${password.sql2:SELECT}

config/src/test/resources/config/values.yaml

@@ -7,4 +7,6 @@ TEST.map:
   key2: element2
 TEST.null:
 TEST.emptyString: ""
-password.escapeValue: def$g
+password.escapeValue: def$g
+password.sql1: SELECT JSON_VALUE(abc, '\$.foo.bar') FROM def
+password.sql2: SELECT JSON_VALUE(abc, '$.foo.bar') FROM def