mybatis只能进行查找，不能进行删除，插入，更新

mybatis只能进行查找，不能进行删除，插入，更新 ，是不是哪里配置错了？ 求各位大神！！~~~
mybatis.xml
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration
  PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
  "http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
<typeAliases>
  <typeAlias alias="User" type="mvc.web.controller.User"/>
</typeAliases>
  <environments default="development">
    <environment id="development">
      <transactionManager type="JDBC"/>
      <dataSource type="POOLED">
        <property name="driver" value="com.mysql.jdbc.Driver"/>
        <property name="url" value="jdbc:mysql://localhost:3306/test"/>
        <property name="username" value="root"/>
        <property name="password" value="123456"/>
      </dataSource>
    </environment>
  </environments>
  <mappers>
    <mapper resource="mvc/web/controller/UserMapper.xml"/>
  </mappers>
</configuration>
UserMapper.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" 
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="mvc.web.controller.UserMapper">
  <cache />  
<select id="selectUser" parameterType="String" resultType="User">
   select * from u  where name = #{name}
</select>
<delete id="deleteUser" parameterType="User">
delete from u where name = #{name}
</delete>
 </mapper>UserMapper.javapackage mvc.web.controller;
public interface UserMapper {
User selectUser(String name);
void deleteUser(User user);
}User.java
package mvc.web.controller;import java.io.Serializable;public class User implements Serializable {
private String id;
private String name;

public User(String id, String name) {
super();
this.id = id;
this.name = name;
}
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}

}单元测试 代码package mvc.web.controller;import java.io.IOException;
import java.io.InputStream;import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;
import org.junit.Test;public class Test_Mybatis {
@Test
public void t1(){
String resource = "mvc/web/controller/mybatis.xml";
InputStream inputStream = null;
try {
inputStream = Resources.getResourceAsStream(resource);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);
SqlSession session = sqlSessionFactory.openSession();
try {
  UserMapper mapper = session.getMapper(UserMapper.class);
  User user = mapper.selectUser("aa");
  System.out.println(user.getId());
  System.out.println(user.getName());
} finally {
  session.close();
}
}
@Test
public void t2(){
String resource = "mvc/web/controller/mybatis.xml";
InputStream inputStream = null;
try {
inputStream = Resources.getResourceAsStream(resource);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);
SqlSession session = sqlSessionFactory.openSession();
try {
  UserMapper mapper = session.getMapper(UserMapper.class);
  mapper.deleteUser(new User("aa","aa"));
  
} finally {
  session.close();
}
}}