1、下载jar
具体到Android，需要在 http://ormlite.com/releases 页面下载两个jar 包（本文基于ORMLite的版本是：ormlite 4.49-SNAPSHOT）：
（1）core列表下的jar包；
（2）android列表下的jar包。
如图所示：
将上面的两个jar包下载后放到Android工程项目中的libs包中，如图所示：
以上完成后，ORMLite开发环境搭建就完成了，接下来就可以使用了。
2、代码：
表student.java和AClass.java
package com.zzw.ormlitedatabasetest; import com.j256.ormlite.field.DatabaseField;
import com.j256.ormlite.table.DatabaseTable; @DatabaseTable(tableName = "Student")
public class Student { @DatabaseField(id = true, columnName = "Student_id")
public int Student_id;
@DatabaseField(columnName = "name")
public String name;
@DatabaseField(columnName = "sex")
public String sex;
@DatabaseField(columnName = "age")
public int age;
@DatabaseField(foreign = true, foreignAutoRefresh = true)
public AClass aClass; public Student() { } public Student(String name, String sex, int age) {
super();
this.name = name;
this.sex = sex;
this.age = age;
} @Override
public String toString() {
return "Student [Student_id=" + Student_id + ", name=" + name + ", sex=" + sex + ", age=" + age + ",className="
+ aClass.name + "]";
} }
Student
package com.zzw.ormlitedatabasetest; import com.j256.ormlite.dao.ForeignCollection;
import com.j256.ormlite.field.DataType;
import com.j256.ormlite.field.DatabaseField;
import com.j256.ormlite.field.ForeignCollectionField;
import com.j256.ormlite.table.DatabaseTable; @DatabaseTable(tableName = "Classess")
public class AClass { @DatabaseField(id = true, columnName = "classess_id")
public int classess_id;
@DatabaseField(dataType = DataType.STRING)
public String name;
@ForeignCollectionField(eager = false)
public ForeignCollection<Student> students = null; public AClass() {
super();
} public AClass(int classess_id, String name, ForeignCollection<Student> students) {
super();
this.classess_id = classess_id;
this.name = name;
this.students = students;
} }
AClass
ORMLite数据库管理工具类ORMLiteDatabaseHelper.java：
package com.zzw.ormlitedatabasetest; import java.sql.SQLException; import com.j256.ormlite.android.apptools.OrmLiteSqliteOpenHelper;
import com.j256.ormlite.dao.Dao;
import com.j256.ormlite.support.ConnectionSource;
import com.j256.ormlite.table.TableUtils; import android.content.Context;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteDatabase.CursorFactory;
import android.util.Log; public class OrmLiteDatabaseHelper extends OrmLiteSqliteOpenHelper {
private static final String TAG = "OrmLiteDatabaseHelper"; public static OrmLiteDatabaseHelper mDatabaseHelper = null; public Dao<Student, Integer> mStudentDao = null;
public Dao<AClass, Integer> mAClassDao = null; public static String database_NAME = "school.db";
public static int database_VERSION = 1; public OrmLiteDatabaseHelper(Context context, String databaseName, CursorFactory factory, int databaseVersion) {
super(context, databaseName, factory, databaseVersion);
} public static OrmLiteDatabaseHelper getInstance(Context context) {
if (mDatabaseHelper == null) {
mDatabaseHelper = new OrmLiteDatabaseHelper(context, database_NAME, null, database_VERSION);
}
Log.d(TAG, "数据库school.db创建成功");
return mDatabaseHelper;
} @Override
public void onCreate(SQLiteDatabase arg0, ConnectionSource arg1) {
try {
TableUtils.createTableIfNotExists(arg1, AClass.class);
Log.e(TAG, "AClass表在School.db中被创建");
TableUtils.createTableIfNotExists(arg1, Student.class);
Log.e(TAG, "Student表在School.db中被创建");
} catch (SQLException e) {
e.printStackTrace();
} } @Override
public void onUpgrade(SQLiteDatabase arg0, ConnectionSource arg1, int arg2, int arg3) { } public Dao<Student, Integer> getStudentDao() {
if (mStudentDao == null) {
try {
mStudentDao = getDao(Student.class);
Log.e(TAG, "得到Student的Dao");
} catch (SQLException e) {
e.printStackTrace();
}
}
return mStudentDao;
} public Dao<AClass, Integer> getAClassDao() {
if (mAClassDao == null) {
try {
mAClassDao = getDao(AClass.class);
Log.e(TAG, "得到AClass的Dao");
} catch (SQLException e) {
e.printStackTrace();
}
}
return mAClassDao;
} @Override
public void close() {
super.close();
if (mAClassDao != null) {
mAClassDao = null;
}
if (mStudentDao != null) {
mStudentDao = null;
}
}
}
MainActivity:
package com.zzw.ormlitedatabasetest; import java.sql.SQLException;
import java.util.List; import com.j256.ormlite.dao.Dao; import android.app.Activity;
import android.graphics.Color;
import android.os.Bundle;
import android.util.Log;
import android.widget.ScrollView;
import android.widget.TextView;
import android.widget.Toast; public class MainActivity extends Activity { private static final String TAG = "MainActivity"; private Dao<AClass, Integer> mAClassDao = null;
private Dao<Student, Integer> mStudentDao = null; AClass aClass1, aClass2, aClass3, aClass4, aClass5; @Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main); OrmLiteDatabaseHelper mOrmLiteDatabaseHelper = OrmLiteDatabaseHelper.getInstance(this); mAClassDao = mOrmLiteDatabaseHelper.getAClassDao();
mStudentDao = mOrmLiteDatabaseHelper.getStudentDao(); } @Override
protected void onStart() {
Log.d(TAG, ">>>>>>>>>>>>");
super.onStart();
int AClasses_count = createAClasses();
if (AClasses_count == 5) {
try {
aClass1 = mAClassDao.queryForId(1);
aClass2 = mAClassDao.queryForId(2);
aClass3 = mAClassDao.queryForId(3);
aClass4 = mAClassDao.queryForId(4);
aClass5 = mAClassDao.queryForId(5); createStudents(); } catch (Exception e) {
e.printStackTrace();
}
} else {
Toast.makeText(this, "班级创建错误", 0).show();
}
queryAllStudents();
} private void createStudents() {
Log.d(TAG, "学生创建开始------>");
Student student = new Student();
for (int i = 1; i <= 20; i++) {
student.Student_id = i;
student.age = (int) (Math.random() * 100);
if (i % 2 == 0) {
student.sex = "男";
} else {
student.sex = "女";
}
if (i > 0 && i <= 4) {
student.aClass = aClass1;
student.name = "陶" + i;
} else if (i > 4 && i <= 8) {
student.aClass = aClass2;
student.name = "李" + i;
} else if (i > 8 && i <= 12) {
student.aClass = aClass3;
student.name = "阿" + i;
} else if (i > 12 && i <= 16) {
student.aClass = aClass4;
student.name = "曾" + i;
} else {
student.aClass = aClass5;
student.name = "蒋" + i;
} try {
mStudentDao.createIfNotExists(student);
} catch (SQLException e) {
e.printStackTrace();
}
}
Log.d(TAG, "学生创建成功------>");
} private int createAClasses() {
Log.d(TAG, "班级创建开始------>");
AClass aClass = new AClass();
int AClasses_count = 0;
for (int i = 1; i <= 5; i++) {
aClass.classess_id = i;
aClass.name = "高三" + i + "班";
try {
mAClassDao.createIfNotExists(aClass);
AClasses_count++;
} catch (SQLException e) {
e.printStackTrace();
}
}
Log.d(TAG, "班级创建成功------>");
return AClasses_count;
} private void queryAllStudents() {
Log.d(TAG, "查询全部学生开始------>>>>");
try {
List<Student> students = mStudentDao.queryForAll();
if (students != null && students.size() > 0) {
for (Student student : students) {
Log.i(TAG, student.toString());
}
}
} catch (SQLException e) {
e.printStackTrace();
}
Log.d(TAG, "查询全部学生完毕------>>>>");
} @Override
protected void onDestroy() {
super.onDestroy();
if (mAClassDao != null) {
mAClassDao = null;
}
if (mStudentDao != null) {
mStudentDao = null;
}
Log.d(TAG, "<<<<<<<<<<<");
} }