public static void showInfo(){

        SqlSession session = getSqlSesion();

        String sql = "me.gacl.mapping.userMapper.getUsers";

        List<Map<String,String>> users = session.selectList(sql);

        for(Map<String,String> u : users){

            System.out.println("id:" + u.get("id").toString() + "--NAME:" + u.get("NAME"));

        }

        session.close();

    }

     <select id="getUsers" resultType="Map">

         select * from users

     </select>

java.lang.ClassCastException: java.lang.Integer cannot be cast to java.lang.String

    at me.gacl.util.MyBatisUtil.showInfo(MyBatisUtil.java:46)

    at me.gacl.test.TestDBUtil.upUser(TestDBUtil.java:71)

    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)

    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

    at java.lang.reflect.Method.invoke(Method.java:498)

    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)

    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)

    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)

    at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)

    at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)

    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)

    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)

    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)

    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)

    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)

    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)

    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)

    at org.junit.runners.ParentRunner.run(ParentRunner.java:363)

    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:86)

    at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)

    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459)

    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:675)

    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)

    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)

    public static void showInfo(){

        SqlSession session = getSqlSesion();

        String sql = "me.gacl.mapping.userMapper.getUsers";

        List<Map<String,Object>> users = session.selectList(sql);

        for(Map<String,Object> u : users){

            System.out.println("id:" + u.get("id").toString() + "--NAME:" + u.get("NAME"));

        }

        session.close();

    }