db4o 记

db4o 记

编程汇总 • 2025-04-03 21:33 • 阅读 15

下载地址 http://developer.db4o.com/files/folders/objectmanager_xx/default.aspx 有cn的

代码—–main

package com;

import bo.AutoInfo;
import bo.People;

import com.db4o.Db4o;
import com.db4o.ObjectContainer;

public class DB4OTest{

public static void main(String[] args){

//打开数据库
ObjectContainer db = Db4o.openFile(“auto.yap”);
try{

//构造 People 对象
People peo = new People();
peo.setId(1);
peo.setAddress(“成都市”);
peo.setName(“张三”);
//构造 AutoInfo 对象
AutoInfo ai = new AutoInfo();
ai.setId(1);
ai.setLicensePlate(“川A00000”);
//设置 People 和 AutoInfo 的关系
ai.setOwnerNo(peo);
peo.addAutoInfo(ai);
//保存对象
db.set(peo);
}finally{

//关闭连接
db.close();
}
}
}
//——————————–

package bo;

public class People {

private java.lang.Integer _id;
private java.lang.String _name;
private java.lang.String _address;
private java.util.List _autoInfoList;

public java.lang.Integer getId() {

return _id;
}

public void setId(java.lang.Integer _id) {

this._id = _id;
}

public java.lang.String getName() {

return _name;
}

public void setName(java.lang.String _name) {

this._name = _name;
}

public java.lang.String getAddress() {

return _address;
}

public void setAddress(java.lang.String _address) {

this._address = _address;
}

public java.util.List getAutoInfoList() {

return this._autoInfoList;
}

public void addAutoInfo(AutoInfo _autoInfoList) {

if (null == this._autoInfoList)
this._autoInfoList = new java.util.ArrayList();
this._autoInfoList.add(_autoInfoList);
}

}
//———————————–

package bo;

public class AutoInfo{

private java.lang.Integer _id;
private java.lang.String _licensePlate;
private bo.People _ownerNo;

public java.lang.Integer getId () {

return _id;
}

public void setId (java.lang.Integer _id) {

this._id = _id;
}

public java.lang.String getLicensePlate () {

return _licensePlate;
}

public void setLicensePlate (java.lang.String _licensePlate) {

this._licensePlate = _licensePlate;
}

public bo.People getOwnerNo () {

return this._ownerNo;
}

public void setOwnerNo (bo.People _ownerNo) {

this._ownerNo = _ownerNo;
}

}

测试后使用 objectmanager 可以查看内容使用版本6.1

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