javatype与oftype的区别

JavaType和ofType都是用来指定对象类型的，但是JavaType是用来指定pojo中对象属性的类型，而ofType指定的是映射到list集合属性中泛型的类型。

xml文件

<?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="com.fpy.rbac.mapper.RbacMapper" >
    <resultMap id="rmap" type="users">
        <id property="username" column="username"/>
        <result property="userpwd" column="userpwd"/>
        <!--配置关联对象-->
        <association property="roles" javaType="roles">
            <id property="roleid" column="roleid"/>
            <result property="rolename" column="rolename"/>
        </association>
      <!--  配置关联集合对象menus-->
        <collection property="menus" ofType="menus">
            <id property="menuid" column="menuid"/>
            <result property="menuname" column="menuname"/>
            <result property="menuurl" column="menuurl"/>
            <result property="fatherid" column="fatherid"/>
        </collection>
        <!-- 配置关联对象Funs -->
        <collection property="funs" ofType="Funs">
            <id property="funid" column="funid"/>
            <result property="funname" column="funname"/>
            <result property="funurl" column="funurl"/>
        </collection>

    </resultMap>

    <select id="selectUserByName" parameterType="string" resultMap="rmap">
        select
               *
        from
            users u,
            roles r,
            roles_menus rm,
            menus m left join funs f on m.menuid=f.menu_id
        where
            u.role_id = r.roleid
        and r.roleid = rm.roles_id
        and rm.menus_id = m.menuid
        and u.username=#{username}
    </select>
</mapper>

实体类：

package com.fpy.rbac.pojo;

import java.util.ArrayList;
import java.util.List;

public class Users {
    private String username;
    private String userpwd;
    private Roles roles;
    private List<Menus> menus = new ArrayList<Menus>();
    private List<Funs> funs = new ArrayList<>();
    public List<Funs> getFuns() {
        return funs;
    }
    public void setFuns(List<Funs> funs) {
        this.funs = funs;
    }
    public List<Menus> getMenus() {
        return menus;
    }
    public void setMenus(List<Menus> menus) {
        this.menus = menus;
    }
    public Roles getRoles() {
        return roles;
    }
    public void setRoles(Roles roles) {
        this.roles = roles;
    }
    public String getUsername() {
        return username;
    }
    public void setUsername(String username) {
        this.username = username;
    }
    public String getUserpwd() {
        return userpwd;
    }
    public void setUserpwd(String userpwd) {
        this.userpwd = userpwd;
    }

    @Override
    public String toString() {
        return "Users{" +
                "username='" + username + '\'' +
                ", userpwd='" + userpwd + '\'' +
                ", roles=" + roles +
                ", menus=" + menus +
                ", funs=" + funs +
                '}';
    }
}