项目初始导入

src/main/java/com/nis/persistence/dialect/H2Dialect.java

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+/**
+ * Copyright &copy; 2012-2014 <a href="https://github.com/thinkgem/jeesite">JeeSite</a> All rights reserved.
+ */
+package com.nis.persistence.dialect;
+
+
+/**
+ * A dialect compatible with the H2 database.
+ *
+ * @author poplar.yfyang
+ * @version 1.0 2010-10-10 下午12:31
+ * @since JDK 1.5
+ */
+public class H2Dialect implements Dialect {
+
+    public boolean supportsLimit() {
+        return true;
+    }
+
+    /**
+     * 将sql变成分页sql语句,提供将offset及limit使用占位符号(placeholder)替换.
+     * <pre>
+     * 如mysql
+     * dialect.getLimitString("select * from user", 12, ":offset",0,":limit") 将返回
+     * select * from user limit :offset,:limit
+     * </pre>
+     *
+     * @param sql               实际SQL语句
+     * @param offset            分页开始纪录条数
+     * @param offsetPlaceholder 分页开始纪录条数－占位符号
+     * @param limit             分页每页显示纪录条数
+     * @param limitPlaceholder  分页纪录条数占位符号
+     * @return 包含占位符的分页sql
+     */
+    private String getLimitString(String sql, int offset, String offsetPlaceholder, int limit, String limitPlaceholder) {
+        return sql + ((offset > 0) ? " limit " + limitPlaceholder + " offset "
+                + offsetPlaceholder : " limit " + limitPlaceholder);
+    }
+
+    @Override
+    public String getLimitString(String sql, int offset, int limit) {
+        return getLimitString(sql, offset, Integer.toString(offset), limit, Integer.toString(limit));
+    }
+}