增加RetException

docs/sqlsource.md

@@ -18,7 +18,7 @@
 ```sql
     SELECT * FROM user WHERE 1=2 OR user_name = 'hello'
 ```
-  有些场景要求参数是必需的，就需要使用$${}来保证不会进行。
+  有些场景要求参数是必需的，就需要使用$${}来校验参数是否必需。
 ```sql
     DELETE FROM user WHERE user_name = $${bean.userName}
 ```
@@ -79,6 +79,6 @@ public interface ForumInfoMapper extends BaseMapper<ForumInfo> {
     @Sql("UPDATE forum_section s "
             + " SET s.forum_sectionid = '' "
             + " WHERE s.forum_section_color = $${bean.forumSectionColor}")
-    public int updateForumResult(ForumBean bean);
+    public int updateForumResult(@Param("bean") ForumBean bean0);
 }
 ```

src/main/java/org/redkale/service/RetException.java

@@ -0,0 +1,43 @@
+/*
+ *
+ */
+package org.redkale.service;
+
+import org.redkale.util.RedkaleException;
+
+/**
+ * 错误码自定义异常类
+ *
+ * <p>详情见: https://redkale.org
+ *
+ * @author zhangjx
+ * @since 2.8.0
+ */
+public class RetException extends RedkaleException {
+
+    private int code;
+
+    public RetException(int code) {
+        super(RetCodes.retInfo(code));
+        this.code = code;
+    }
+
+    public RetException(int code, String message) {
+        super(message);
+        this.code = code;
+    }
+
+    public RetException(int code, Throwable cause) {
+        super(RetCodes.retInfo(code), cause);
+        this.code = code;
+    }
+
+    public RetException(int code, String message, Throwable cause) {
+        super(message, cause);
+        this.code = code;
+    }
+
+    public int getCode() {
+        return code;
+    }
+}

src/main/java/org/redkale/service/RetResult.java

@@ -126,11 +126,21 @@ public class RetResult<T> implements Serializable {
         return new RetResult(retcode, retinfo);
     }
 
+    // @since 2.8.0
+    public static <T> RetResult<T> fail(RetException ex) {
+        return new RetResult(ex.getCode(), ex.getMessage());
+    }
+
     // @since 2.7.0
     public static <T> CompletableFuture<RetResult<T>> failFuture(int retcode, String retinfo) {
         return CompletableFuture.completedFuture(new RetResult(retcode, retinfo));
     }
 
+    // @since 2.8.0
+    public static <T> CompletableFuture<RetResult<T>> failFuture(RetException ex) {
+        return CompletableFuture.completedFuture(new RetResult(ex.getCode(), ex.getMessage()));
+    }
+
     // @since 2.7.0
     public T join() {
         if (isSuccess()) {