大家好，又见面了，我是你们的朋友全栈君。
阅读 http://www-128.ibm.com/developerworks/cn/java/j-lo-db4o2/
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<AutoInfo> _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<AutoInfo> getAutoInfoList() {
return this._autoInfoList;
}
public void addAutoInfo(AutoInfo _autoInfoList) {
if (null == this._autoInfoList)
this._autoInfoList = new java.util.ArrayList<AutoInfo>();
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
发布者：全栈程序员栈长，转载请注明出处：https://javaforall.cn/162608.html原文链接：https://javaforall.cn