怎么从ibatis中获取SQL
展开全部
如何从ibatis中获取SQL
以下是在网上搜到的办法:
运行期从ibatis配置文件中获取sql的两种方法
运行期从ibatis配置文件中获取sql
1.通过SqlMapClientDaoSupport,SqlMapClientImpl,MappedStatement,Sql,RequestScope等ibatis提供的类
public List<UserInfo> getUserList(UserInfo userInfo) {
String sql = null;
SqlMapClientImpl sqlmap = (SqlMapClientImpl) this.getSqlMapClient();
MappedStatement stmt = sqlmap.getMappedStatement("getUserInfoList");
Sql stmtSql = stmt.getSql();
RequestScope requestScope = new RequestScope();
requestScope.setStatement(stmt);
sql = stmtSql.getSql(requestScope, userInfo);
System.out.println(sql);
return null;
}
注:这个方法我是写在dao中的,该dao extends SqlMapClientDaoSupport,所以上述就可以直接this调用getSqlMapClient()方法,
2.通过SqlMapExecutorDelegate,MappedStatement,Sql,RequestScope等ibatis提供的类
public List<UserInfo> getUserList(UserInfo userInfo) {
SqlMapExecutorDelegate delegate=((ExtendedSqlMapClient)
(getSqlMapClientTemplate().getSqlMapClient())).getDelegate();
MappedStatement ms = delegate.getMappedStatement("getUserInfoList");
Sql sql=ms.getSql();
RequestScope requestScope = new RequestScope();
requestScope.setStatement(ms);
String sqlStr = sql.getSql(requestScope,userInfo);
System.out.println(sqlStr);
}
注:这两个例子中用到的类都是ibatis官方jar文件中的,快速导入即可,"getUserInfoList"为ibatis的xml文件中配置的id,getSql(,)
中第二个参数就是要传递的参数对象。
上述写法完全可以再简化,上述只是简单介绍,可供参考.......
参考:http://hi.baidu.com/iduany/item/254166ffaef7a3e81a111f71
但是以上方法有点问题,ibatis参数有$和#之分,当#的时候,获取出来的SQL是含有?号的。
我想ibatis一定也是最后使用的是JDBC的一种实现,所以就debug了一下源代码。
看了一下,总结了一下,可以这样实现:
package com.seven.dbTools.ibatis;
import java.util.HashMap;
import java.util.Map;
import org.springframework.orm.ibatis.support.SqlMapClientDaoSupport;
import com.ibatis.sqlmap.engine.impl.SqlMapClientImpl;
import com.ibatis.sqlmap.engine.mapping.parameter.ParameterMap;
import com.ibatis.sqlmap.engine.mapping.sql.Sql;
import com.ibatis.sqlmap.engine.scope.RequestScope;
import com.ibatis.sqlmap.engine.mapping.statement.MappedStatement;
public class IbatisUtil extends SqlMapClientDaoSupport {
/**
* get sql from ibatis :从ibatis中获取sql已经动态参数
* @param sqlid : sqlMap中的id
* @param parameterMap : 参数map
* @return
*/
public Map<String, Object[]> getSqlAndParametersFromIbatis(String sqlid,
Map parameterMap) {
String sql = null;
SqlMapClientImpl sqlmap = (SqlMapClientImpl) this.getSqlMapClient();
MappedStatement stmt = sqlmap.getMappedStatement(sqlid);
Sql stmtSql = stmt.getSql();
RequestScope requestScope = new RequestScope();
requestScope.setStatement(stmt);
ParameterMap dynamicParameterMap = stmtSql.getParameterMap(
requestScope, parameterMap);
Object[] values = null;
if (dynamicParameterMap != null) {
values = dynamicParameterMap.getParameterObjectValues(requestScope,
parameterMap);
}
sql = stmtSql.getSql(requestScope, parameterMap);
Map<String, Object[]> sqlMap = new HashMap<String, Object[]>();
sqlMap.put(sql, values);
return sqlMap;
}
}
以上代码得到SQL和动态的参数。
以下是在网上搜到的办法:
运行期从ibatis配置文件中获取sql的两种方法
运行期从ibatis配置文件中获取sql
1.通过SqlMapClientDaoSupport,SqlMapClientImpl,MappedStatement,Sql,RequestScope等ibatis提供的类
public List<UserInfo> getUserList(UserInfo userInfo) {
String sql = null;
SqlMapClientImpl sqlmap = (SqlMapClientImpl) this.getSqlMapClient();
MappedStatement stmt = sqlmap.getMappedStatement("getUserInfoList");
Sql stmtSql = stmt.getSql();
RequestScope requestScope = new RequestScope();
requestScope.setStatement(stmt);
sql = stmtSql.getSql(requestScope, userInfo);
System.out.println(sql);
return null;
}
注:这个方法我是写在dao中的,该dao extends SqlMapClientDaoSupport,所以上述就可以直接this调用getSqlMapClient()方法,
2.通过SqlMapExecutorDelegate,MappedStatement,Sql,RequestScope等ibatis提供的类
public List<UserInfo> getUserList(UserInfo userInfo) {
SqlMapExecutorDelegate delegate=((ExtendedSqlMapClient)
(getSqlMapClientTemplate().getSqlMapClient())).getDelegate();
MappedStatement ms = delegate.getMappedStatement("getUserInfoList");
Sql sql=ms.getSql();
RequestScope requestScope = new RequestScope();
requestScope.setStatement(ms);
String sqlStr = sql.getSql(requestScope,userInfo);
System.out.println(sqlStr);
}
注:这两个例子中用到的类都是ibatis官方jar文件中的,快速导入即可,"getUserInfoList"为ibatis的xml文件中配置的id,getSql(,)
中第二个参数就是要传递的参数对象。
上述写法完全可以再简化,上述只是简单介绍,可供参考.......
参考:http://hi.baidu.com/iduany/item/254166ffaef7a3e81a111f71
但是以上方法有点问题,ibatis参数有$和#之分,当#的时候,获取出来的SQL是含有?号的。
我想ibatis一定也是最后使用的是JDBC的一种实现,所以就debug了一下源代码。
看了一下,总结了一下,可以这样实现:
package com.seven.dbTools.ibatis;
import java.util.HashMap;
import java.util.Map;
import org.springframework.orm.ibatis.support.SqlMapClientDaoSupport;
import com.ibatis.sqlmap.engine.impl.SqlMapClientImpl;
import com.ibatis.sqlmap.engine.mapping.parameter.ParameterMap;
import com.ibatis.sqlmap.engine.mapping.sql.Sql;
import com.ibatis.sqlmap.engine.scope.RequestScope;
import com.ibatis.sqlmap.engine.mapping.statement.MappedStatement;
public class IbatisUtil extends SqlMapClientDaoSupport {
/**
* get sql from ibatis :从ibatis中获取sql已经动态参数
* @param sqlid : sqlMap中的id
* @param parameterMap : 参数map
* @return
*/
public Map<String, Object[]> getSqlAndParametersFromIbatis(String sqlid,
Map parameterMap) {
String sql = null;
SqlMapClientImpl sqlmap = (SqlMapClientImpl) this.getSqlMapClient();
MappedStatement stmt = sqlmap.getMappedStatement(sqlid);
Sql stmtSql = stmt.getSql();
RequestScope requestScope = new RequestScope();
requestScope.setStatement(stmt);
ParameterMap dynamicParameterMap = stmtSql.getParameterMap(
requestScope, parameterMap);
Object[] values = null;
if (dynamicParameterMap != null) {
values = dynamicParameterMap.getParameterObjectValues(requestScope,
parameterMap);
}
sql = stmtSql.getSql(requestScope, parameterMap);
Map<String, Object[]> sqlMap = new HashMap<String, Object[]>();
sqlMap.put(sql, values);
return sqlMap;
}
}
以上代码得到SQL和动态的参数。
推荐律师服务:
若未解决您的问题,请您详细描述您的问题,通过百度律临进行免费专业咨询