[Fix][Connector-V2] Fix text file read separator issue (#8970)

Author: corgy-w

Diff for: seatunnel-formats/seatunnel-format-text/src/main/java/org/apache/seatunnel/format/text/splitor/DefaultTextLineSplitor.java

@@ -18,11 +18,12 @@
 package org.apache.seatunnel.format.text.splitor;
 
 import java.io.Serializable;
+import java.util.regex.Pattern;
 
 public class DefaultTextLineSplitor implements TextLineSplitor, Serializable {
 
     @Override
     public String[] spliteLine(String line, String seperator) {
-        return line.split(seperator, -1);
+        return line.split(Pattern.quote(seperator), -1);
     }
 }

Diff for: seatunnel-formats/seatunnel-format-text/src/test/java/org/apache/seatunnel/format/text/TextFormatSchemaTest.java

@@ -232,4 +232,22 @@ public void testSerializationWithNullValue() throws Exception {
                 "\\N\u0001\\N\u0001\\N\u0001\\N\u0001\\N\u0001\\N\u0001\\N\u0001\\N",
                 new String(textSerializationSchema.serialize(expected)));
     }
+
+    @Test
+    public void testSerializationWithRequireEscapeCharacters() throws Exception {
+        SeaTunnelRowType rowType =
+                new SeaTunnelRowType(
+                        new String[] {"id", "name"},
+                        new SeaTunnelDataType[] {INT_TYPE, STRING_TYPE});
+        TextDeserializationSchema deserializationSchema =
+                TextDeserializationSchema.builder()
+                        .seaTunnelRowType(rowType)
+                        .delimiter("|")
+                        .build();
+
+        String content = "1|tyrantlucifer";
+        SeaTunnelRow seaTunnelRow = deserializationSchema.deserialize(content.getBytes());
+        Assertions.assertEquals(1, seaTunnelRow.getField(0));
+        Assertions.assertEquals("tyrantlucifer", seaTunnelRow.getField(1));
+    }
 }