<h1> nested exception is org.hibernate.LazyInitializationException:</h1>

*:http://*.com/questions/36106620/failed-to-lazily-initialize-a-collection-of-role-user-authorities-could-not-in

也可以

@ManyToMany(fetch = FetchType.LAZY)  ==》 （fetch = FetchType.EAGER）
@Fetch(FetchMode.SUBSELECT)
@JoinTable(
        name = "sys_user_role",
        joinColumns = { @JoinColumn(name = "role_id") },
        inverseJoinColumns = @JoinColumn(name = "user_id")
)
@JsonIgnore
public Set<SysUser> getSysUsers() {
    return sysUsers;
}

public void setSysUsers(Set<SysUser> sysUsers) {
    this.sysUsers = sysUsers;
}