Mybatis 报错:java.lang.NoSuchMethodException: java.lang.Long.<init>()

用户找角色时, 用户mapper中使用association 关联角色mapper 中的查询.

 用户代码

package mybatis.simple.model;

import java.io.Serializable;
import java.util.Date;

public class SysUser   implements Serializable {
    private static final long serialVersionUID = -7811230963635946774L;
    private Long id;
    private String userName;
    private String userPassword;
    private String userEmail;
    private String userInfo;
    private Date createTime;
    private byte[] headImg;
    private SysRole sysRole;
    
    public Long getId() {
        return id;
    }
    public void setId(Long id) {
        this.id = id;
    }
    
    public String getUserName() {
        return userName;
    }
    public void setUserName(String userName) {
        this.userName = userName;
    }

    public String getUserPassword() {
        return userPassword;
    }
    public void setUserPassword(String userPassword) {
        this.userPassword = userPassword;
    }

    public String getUserEmail() {
        return userEmail;
    }
    public void setUserEmail(String userEmail) {
        this.userEmail = userEmail;
    }

    public String getUserInfo() {
        return userInfo;
    }
    public void setUserInfo(String userInfo) {
        this.userInfo = userInfo;
    }
    
    public Date getCreateTime() {
        return createTime;
    }
    public void setCreateTime(Date createTime) {
        this.createTime = createTime;
    }

    public byte[] getHeadImg() {
        return headImg;
    }
    public void setHeadImg(byte[] headImg) {
        this.headImg = headImg;
    }

    public SysRole getSysRole() {
        return sysRole;
    }
    public void setSysRole(SysRole sysRole) {
        this.sysRole = sysRole;
    }
}

用户接口配置:

package mybatis.simple.mapper;

import tk.mybatis.simple.model.SysUser;

public interface SysUserMapper {
    SysUser selectUserAndRoleByPrimaryKey02(Long id);

}

用户mapper.xml 配置

<resultMap id="userWithRole02" type="tk.mybatis.simple.model.SysUser">
    <association property="sysRole" column="{id=role_id}" select="tk.mybatis.simple.mapper.SysRoleMapper.selectByPrimaryKey"/>
  </resultMap>

  <select id="selectUserAndRoleByPrimaryKey02" resultMap="userWithRole02">
    select u.* , ur.role_id
    from sys_user u
    inner join sys_user_role ur on ur.user_id=u.id
    where u.id=#{id}
  </select>

角色mapper.xml 配置

  <select id="selectByPrimaryKey" parameterType="java.lang.Long" resultMap="BaseResultMap">
    select 
    <include refid="Base_Column_List" />
    from sys_role
    where id = #{id,jdbcType=BIGINT}
  </select>

测试代码

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.BeforeClass;
import org.junit.Test;
import tk.mybatis.simple.model.SysUser;

import java.io.IOException;
import java.io.Reader;
import java.util.Date;
import java.util.List;

public class SysUserTest extends BaseTest {
    
    private static SqlSessionFactory sqlSessionFactory;
    @BeforeClass
    public static void buildSqlSessionFactory() {
        try {
            Reader reader = Resources.getResourceAsReader("mybatis-config.xml");
            sqlSessionFactory = new SqlSessionFactoryBuilder().build(reader);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    public SqlSession getSqlSession() {
        return sqlSessionFactory.openSession();
    }
    @Test
    public void testselectUserAndRoleByPrimaryKey02(){
        SqlSession sqlSession = getSqlSession();
        try{
            SysUserMapper mapper = sqlSession.getMapper(SysUserMapper.class);
            SysUser sysUser = mapper.selectUserAndRoleByPrimaryKey02(1L);
            System.out.println(sysUser);
        } finally {
            sqlSession.close();
        }
    }
}

测试后报错为:

DEBUG [main] - ==>  Preparing: select u.* , ur.role_id from sys_user u inner join sys_user_role ur on ur.user_id=u.id where u.id=? 
DEBUG [main] - ==> Parameters: 1(Long)
TRACE [main] - <==    Columns: id, user_name, user_password, user_email, user_info, head_img, create_time, role_id
TRACE [main] - <==        Row: 1, admin, 123456, [email protected], 管理员, <<BLOB>>, 2017-07-29 22:02:32.0, 1


org.apache.ibatis.exceptions.PersistenceException: 
### Error querying database.  Cause: org.apache.ibatis.reflection.ReflectionException: Error instantiating class java.lang.Long with invalid types () or values (). Cause: java.lang.NoSuchMethodException: java.lang.Long.<init>()
### The error may exist in tk/mybatis/simple/mapper/SysUserMapper.xml
### The error may involve tk.mybatis.simple.mapper.SysUserMapper.selectUserAndRoleByPrimaryKey02
### The error occurred while handling results
### SQL: select u.* , ur.role_id     from sys_user u     inner join sys_user_role ur on ur.user_id=u.id     where u.id=?
### Cause: org.apache.ibatis.reflection.ReflectionException: Error instantiating class java.lang.Long with invalid types () or values (). Cause: java.lang.NoSuchMethodException: java.lang.Long.<init>()


at org.apache.ibatis.exceptions.ExceptionFactory.wrapException(ExceptionFactory.java:30)
at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:122)
at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:113)
at org.apache.ibatis.session.defaults.DefaultSqlSession.selectOne(DefaultSqlSession.java:73)
at org.apache.ibatis.binding.MapperMethod.execute(MapperMethod.java:69)
at org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:53)
at com.sun.proxy.$Proxy5.selectUserAndRoleByPrimaryKey02(Unknown Source)
at mybatis.simple.mapper.SysUserTest.testselectUserAndRoleByPrimaryKey02(SysUserTest.java:27)
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$2.evaluate(ParentRunner.java:268)
at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47)
at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)
Caused by: org.apache.ibatis.reflection.ReflectionException: Error instantiating class java.lang.Long with invalid types () or values (). Cause: java.lang.NoSuchMethodException: java.lang.Long.<init>()
at org.apache.ibatis.reflection.factory.DefaultObjectFactory.instantiateClass(DefaultObjectFactory.java:90)
at org.apache.ibatis.reflection.factory.DefaultObjectFactory.create(DefaultObjectFactory.java:50)
at org.apache.ibatis.reflection.factory.DefaultObjectFactory.create(DefaultObjectFactory.java:42)
at org.apache.ibatis.executor.resultset.DefaultResultSetHandler.instantiateParameterObject(DefaultResultSetHandler.java:696)
at org.apache.ibatis.executor.resultset.DefaultResultSetHandler.prepareCompositeKeyParameter(DefaultResultSetHandler.java:676)
at org.apache.ibatis.executor.resultset.DefaultResultSetHandler.prepareParameterForNestedQuery(DefaultResultSetHandler.java:659)
at org.apache.ibatis.executor.resultset.DefaultResultSetHandler.getNestedQueryMappingValue(DefaultResultSetHandler.java:635)
at org.apache.ibatis.executor.resultset.DefaultResultSetHandler.getPropertyMappingValue(DefaultResultSetHandler.java:404)
at org.apache.ibatis.executor.resultset.DefaultResultSetHandler.applyPropertyMappings(DefaultResultSetHandler.java:384)
at org.apache.ibatis.executor.resultset.DefaultResultSetHandler.getRowValue(DefaultResultSetHandler.java:346)
at org.apache.ibatis.executor.resultset.DefaultResultSetHandler.handleRowValuesForSimpleResultMap(DefaultResultSetHandler.java:298)
at org.apache.ibatis.executor.resultset.DefaultResultSetHandler.handleRowValues(DefaultResultSetHandler.java:273)
at org.apache.ibatis.executor.resultset.DefaultResultSetHandler.handleResultSet(DefaultResultSetHandler.java:246)
at org.apache.ibatis.executor.resultset.DefaultResultSetHandler.handleResultSets(DefaultResultSetHandler.java:160)
at org.apache.ibatis.executor.statement.PreparedStatementHandler.query(PreparedStatementHandler.java:63)
at org.apache.ibatis.executor.statement.RoutingStatementHandler.query(RoutingStatementHandler.java:78)
at org.apache.ibatis.executor.SimpleExecutor.doQuery(SimpleExecutor.java:62)
at org.apache.ibatis.executor.BaseExecutor.queryFromDatabase(BaseExecutor.java:303)
at org.apache.ibatis.executor.BaseExecutor.query(BaseExecutor.java:154)
at org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:102)
at org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:82)
at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:120)
... 29 more
Caused by: java.lang.NoSuchMethodException: java.lang.Long.<init>()
at java.lang.Class.getConstructor0(Class.java:3082)
at java.lang.Class.getDeclaredConstructor(Class.java:2178)
at org.apache.ibatis.reflection.factory.DefaultObjectFactory.instantiateClass(DefaultObjectFactory.java:62)
... 50 more

后将角色mapper.xml  id="selectByPrimaryKey" 中parameterType 去掉后执行成功. 
应该是因为配置了ParameterType 后Mybatis 会自动创建对象并且设置参数. 但java.lang.Long 没有空参数的构造函数报错. 去掉parameterType 后, Mybatis 会自动进行类型匹配.