StructureUtil.java

import net.minecraft.server.v1_10_R1.Block;
import net.minecraft.server.v1_10_R1.BlockPosition;
import net.minecraft.server.v1_10_R1.Blocks;
import net.minecraft.server.v1_10_R1.ChunkCoordIntPair;
import net.minecraft.server.v1_10_R1.DefinedStructure;
import net.minecraft.server.v1_10_R1.DefinedStructureInfo;
import net.minecraft.server.v1_10_R1.DefinedStructureManager;
import net.minecraft.server.v1_10_R1.EnumBlockMirror;
import net.minecraft.server.v1_10_R1.EnumBlockRotation;
import net.minecraft.server.v1_10_R1.MinecraftKey;
import net.minecraft.server.v1_10_R1.MinecraftServer;
import net.minecraft.server.v1_10_R1.WorldServer;

import org.bukkit.Location;
import org.bukkit.craftbukkit.v1_10_R1.CraftWorld;

/**
 * Created by Martin on 05.11.2016.
 */
public class StructureUtil {
    
    /**
     * Saves a schematic
     *
     * @param start  the start location
     * @param size   the size
     * @param name   the name
     * @param author the author
     * @return idk, ask nms...
     */
    public static boolean save(Location start, Vector size, String name, String author) {
        BlockPosition startPos = new BlockPosition(start.getBlockX(), start.getBlockY(), start.getBlockZ());
        BlockPosition sizePos = new BlockPosition(size.getBlockX(),size.getBlockY(),size.getBlockZ());
        WorldServer world = ((CraftWorld) start.getWorld()).getHandle();
        MinecraftServer server = world.getMinecraftServer();
        DefinedStructureManager structureManager = world.y();
        DefinedStructure structure = structureManager.a(server, new MinecraftKey(name));
        structure.a(world, startPos, sizePos, true, Blocks.dj); // false -> do not includ entities, dj -> stucture void
        structure.a(author); // set author
        return structureManager.d(server, new MinecraftKey(name)); // rename to c for 1.11
    }
    
    /**
     * Loads a structure
     *
     * @param origin the origin location
     * @param name   the name
     * @return if is was successful
     */
    public static boolean load(Location origin, String name) {
        BlockPosition originPos = new BlockPosition(origin.getBlockX(), origin.getBlockY(), origin.getBlockZ());
        WorldServer world = ((CraftWorld) origin.getWorld()).getHandle();
        MinecraftServer server = world.getMinecraftServer();
        DefinedStructureManager structureManager = world.y();
        DefinedStructure structure = structureManager.b(server, new MinecraftKey(name));
        if (structure == null) {
            return false;
        } else {
            DefinedStructureInfo structureInfo = (new DefinedStructureInfo()).a(EnumBlockMirror.NONE).a(EnumBlockRotation.NONE).a(false).a((ChunkCoordIntPair) null).a((Block) null).b(false);
            structure.a(world, originPos, structureInfo);
            return true;
        }
    }
}

https://gist.github.com/MiniDigger/e10fdb52db509f4b82980ea9b4040e60#file-structureutil-java-L33

Replace the getX/Y/Z with getBlockX/Y/Z. I forgot it while writing on phone.

ah, saw that two while writing the reflection version, forgot to update this one, thank you