使用Morphia框架操作mongodb

1. mac 下安装mongodb

sudo brew update

sudo brew install mongodb

sudo brew services mongodb start

2. 创建映射类

package mongodbDemo;
 
import org.mongodb.morphia.annotations.Entity;
import org.mongodb.morphia.annotations.Id;
  
 
//利用morphia的annotation进行注解
@Entity
public class User {
    @Id
    private long id;
     
    private String name;
    private boolean sex;
    private int age;
    private String address;
     
    public User() {
    }
    public User(long id, String name, boolean sex, int age, String address) {
        super();
        this.id = id;
        this.name = name;
        this.sex = sex;
        this.age = age;
        this.address = address;
    }
    //getter、setter
     
    @Override
    public String toString() {
        return this.id + "#" + this.name + "#" + this.age + "#" + this.sex + "#" + this.address;
    }
}

3. 测试代码

package mongodbDemo;
 
import org.mongodb.morphia.Datastore;
import org.mongodb.morphia.Morphia;
 
import com.mongodb.MongoClient;
 
public class demo {
     
    public static void main(String[] args) {
         
        Morphia morphia = new Morphia();
 
        // 告诉Morphia在哪里找到你的类
        // 可以为不同的包或者类进行多次的调用
        morphia.mapPackage("mongodbDemo");
 
        //创建datastore，并连接到指定数据库
        //datastore有两个参数，第一个用来连接到MongoDB，第二个是数据库的名字。
        final Datastore datastore = morphia.createDatastore(new MongoClient("localhost"), "morphia_example");
        datastore.ensureIndexes();
         
        final User user = new User(0,"zhansan",false,20,"home");
        datastore.save(user);
         
         
    }
     
}