增加校验:在系统中发现了多个分页插件，请检查系统配置!

abel533 · abel533 · commit f47692c774a1 · 2017-01-12T20:37:43.000+08:00
diff --git a/src/main/java/com/github/pagehelper/PageHelper.java b/src/main/java/com/github/pagehelper/PageHelper.java
@@ -28,6 +28,7 @@
 import com.github.pagehelper.page.PageAutoDialect;
 import com.github.pagehelper.page.PageMethod;
 import com.github.pagehelper.page.PageParams;
+import com.github.pagehelper.util.MSUtils;
 import org.apache.ibatis.cache.CacheKey;
 import org.apache.ibatis.mapping.BoundSql;
 import org.apache.ibatis.mapping.MappedStatement;
@@ -49,6 +50,9 @@ public class PageHelper extends PageMethod implements Dialect {
 
     @Override
     public boolean skip(MappedStatement ms, Object parameterObject, RowBounds rowBounds) {
+        if(ms.getId().endsWith(MSUtils.COUNT)){
+            throw new RuntimeException("在系统中发现了多个分页插件，请检查系统配置!");
+        }
         Page page = pageParams.getPage(parameterObject, rowBounds);
         if (page == null) {
             return true;
diff --git a/src/main/java/com/github/pagehelper/PageInterceptor.java b/src/main/java/com/github/pagehelper/PageInterceptor.java
@@ -93,7 +93,7 @@ public Object intercept(Invocation invocation) throws Throwable {
                 if (dialect.beforeCount(ms, parameter, rowBounds)) {
                     //创建 count 查询的缓存 key
                     CacheKey countKey = executor.createCacheKey(ms, parameter, RowBounds.DEFAULT, boundSql);
-                    countKey.update("_Count");
+                    countKey.update(MSUtils.COUNT);
                     MappedStatement countMs = msCountMap.get(countKey);
                     if (countMs == null) {
                         //根据当前的 ms 创建一个返回值为 Long 类型的 ms
diff --git a/src/main/java/com/github/pagehelper/util/MSUtils.java b/src/main/java/com/github/pagehelper/util/MSUtils.java
@@ -37,6 +37,7 @@
  * @author liuzh
  */
 public class MSUtils {
+    public static final String COUNT = "_COUNT";
     private static final List<ResultMapping> EMPTY_RESULTMAPPING = new ArrayList<ResultMapping>(0);
 
     /**
@@ -46,7 +47,7 @@ public class MSUtils {
      * @return
      */
     public static MappedStatement newCountMappedStatement(MappedStatement ms) {
-        MappedStatement.Builder builder = new MappedStatement.Builder(ms.getConfiguration(), ms.getId() + "_COUNT", ms.getSqlSource(), ms.getSqlCommandType());
+        MappedStatement.Builder builder = new MappedStatement.Builder(ms.getConfiguration(), ms.getId() + COUNT, ms.getSqlSource(), ms.getSqlCommandType());
         builder.resource(ms.getResource());
         builder.fetchSize(ms.getFetchSize());
         builder.statementType(ms.getStatementType());
