一：首先下载 ORMLite Jar 包

先去 ORMLite官网下载jar包 写博客时，目前最新的，对于Android为：ormlite-android-5.0.jar 和 ormlite-core-5.0.jar ； 
然后分包处理，建议如图所示分包：

二：配置Bean类

@DatabaseTable(tableName = "Book")public class MyBean {

@DatabaseField(generatedId = true)private int id;

@DatabaseField(columnName = "name")public String name;

@DatabaseField(columnName = "author")public String author;

@DatabaseField(columnName = "price")public String price;

@DatabaseField(columnName = "pages")public int pages;

public String getAuthor() {return author;}

public void setAuthor(String author) {this.author = author;}

public String getPrice() {return price;}

public void setPrice(String price) {this.price = price;}

public int getPages() {return pages;}

public void setPages(int pages) {this.pages = pages;}

public String getName() {return name;}

public void setName(String name) {this.name = name;}
}

三：编写Helper类

public class MyDatabaseHelper extends OrmLiteSqliteOpenHelper {

public static final String DB_NAME = "BookStore.db";public static final int DB_VERSION = 1;

public MyDatabaseHelper(Context context) {super(context, DB_NAME, null, DB_VERSION);}

@Overridepublic void onCreate(SQLiteDatabase sqLiteDatabase, ConnectionSource connectionSource) {try {TableUtils.createTable(connectionSource, MyBean.class);} catch (SQLException e) {e.printStackTrace();}}

@Overridepublic void onUpgrade(SQLiteDatabase sqLiteDatabase, ConnectionSource connectionSource, int oldVersion, int newVersion) {System.out.println("MyDatabaseHelper.onUpgrade oldVersion=" + oldVersion + "  newVersion=" + newVersion);try {

switch (oldVersion) {case 1:getDao(MyBean.class).executeRaw("alter table Book add column book_type varchar(20)");//在数据库版本1的下一版本，Book表中新添加了 book_type 字段

case 2:// TableUtils.createTable(connectionSource, MyBean2.class);//在数据库版本2的下一版本，新增加了一张表default:break;}

//显然这样处理比较暴力//TableUtils.dropTable(connectionSource, MyBean.class, true);//onCreate(sqLiteDatabase, connectionSource);} catch (SQLException e) {e.printStackTrace();}}

private static MyDatabaseHelper instance;

/*** 单例获取该Helper** @param context* @return*/public static MyDatabaseHelper getHelper(Context context) {if (instance == null) {synchronized (MyDatabaseHelper.class) {if (instance == null)instance = new MyDatabaseHelper(context);}}return instance;}

private Map<String, Dao> daos = new HashMap<>();

public synchronized Dao getDao(Class clazz) throws SQLException {Dao dao = null;String className = clazz.getSimpleName();if (daos.containsKey(className)) {dao = daos.get(clazz);}if (dao == null) {dao = super.getDao(clazz);daos.put(className, dao);}return dao;}

@Overridepublic void close() {super.close();for (String key : daos.keySet()) {Dao dao = daos.get(key);dao = null;}}

}

四：编写DAO类

1：接口编写：

public interface MyDataImpl {

void insert(ArrayList<MyBean> beanArrayList);

void insert(MyBean myBean);

void update(String name, String price);

void update2(String columnName, String columnValue);

void update3(String queryColumnName, String queryColumnValue, String setColumnName, String setColumnValue);

void delete(String name);

int deleteAll();

ArrayList<String> queryPrice(String name);

String queryAuthor(String name, String price);

long queryCount();

ArrayList<MyBean> queryId(int id);

ArrayList<MyBean> queryAll();

}

public class MyDataDao implements MyDataImpl {private MyDatabaseHelper mHelper;private Dao<MyBean, Integer> dao;private Context mContext;private static MyDataDao instance;

protected MyDataDao(Context context) {this.mContext = context;try {mHelper = MyDatabaseHelper.getHelper(mContext);dao = mHelper.getDao(MyBean.class);} catch (SQLException e) {e.printStackTrace();}}

public static MyDataDao getInstance(Context context) {if (instance == null) {synchronized (MyDataDao.class) {if (instance == null) {instance = new MyDataDao(context);}}

}return instance;}

@Overridepublic void insert(MyBean myBean) {

try {

//事务操作/* TransactionManager.callInTransaction(mHelper.getConnectionSource(), new Callable<Void>() {@Overridepublic Void call() throws Exception {return null;}});*/

dao.create(myBean);//dao.createOrUpdate(myBean);//和上一行的方法效果一样} catch (SQLException e) {e.printStackTrace();}}

@Overridepublic void insert(ArrayList<MyBean> beanArrayList) {try {dao.create(beanArrayList);} catch (SQLException e) {e.printStackTrace();}}

@Overridepublic void update(String name, String price) {ArrayList<MyBean> list = null;try {list = (ArrayList<MyBean>) dao.queryForEq("name", name);if (list != null) {for (MyBean bean : list) {bean.setPrice(price);dao.update(bean);//dao.createOrUpdate(bean);//和上一行的方法效果一样}

}} catch (SQLException e) {e.printStackTrace();}}

@Overridepublic void update2(String columnName, String columnValue) {try {//下面这两个代码的意思一样dao.updateBuilder().updateColumnValue(columnName, columnValue).update();//dao.updateRaw("update Book set " + columnName + "=?", new String[]{columnValue});} catch (SQLException e) {e.printStackTrace();}

}

@Overridepublic void update3(String queryColumnName, String queryColumnValue, String setColumnName, String setColumnValue) {try {String sql = "update Book set " + setColumnName + "= '" + setColumnValue + "' where " + queryColumnName + "= '" + queryColumnValue + "'";System.out.println("MyDataDao.update3 sql=" + sql);dao.updateRaw(sql);

//dao.updateRaw("update Book set price= '33333元' where name= '西游记'");//等价于上面的写法} catch (SQLException e) {e.printStackTrace();}}

@Overridepublic void delete(String name) {ArrayList<MyBean> list = null;try {list = (ArrayList<MyBean>) dao.queryForEq("name", name);if (list != null) {for (MyBean bean : list) {dao.delete(bean);}}} catch (SQLException e) {e.printStackTrace();}}

/*** @return -1:删除数据异常  0：无数据*/@Overridepublic int deleteAll() {int number = -1;try {number = dao.deleteBuilder().delete();//返回删除的数据条数  例如：删除1条数据，返回1，依次类推。

//dao.deleteBuilder().where().eq("name", "记").reset();//????} catch (SQLException e) {e.printStackTrace();}return number;}

@Overridepublic ArrayList<String> queryPrice(String name) {List<MyBean> list = null;ArrayList<String> strings = null;try {list = dao.queryForEq("name", name);if (list != null) {strings = new ArrayList<>();for (MyBean myBean : list) {strings.add(myBean.getPrice());}/*for (int i = 0; i < list.size(); i++) {strings.add(list.get(i).getPrice());}*/}} catch (SQLException e) {e.printStackTrace();}return strings;}

@Overridepublic String queryAuthor(String name1, String price1) {List<MyBean> list = null;String author = "";

try {list = dao.queryBuilder().where().eq("name", name1).and().eq("price", price1).query();//上述相当与：select * from Book where name = name1 and price = price1 ;if (list != null) {for (MyBean myBean : list) {author = myBean.getAuthor();}}} catch (SQLException e) {e.printStackTrace();}

return author;//说明：如果这个 author 是唯一的，可以这样的返回。如果是多个的话，要返回一个ArrayList<String> 类型}

/*** @return 表中数据的个数*/@Overridepublic long queryCount() {long number = 0;try {number = dao.queryBuilder().countOf();} catch (SQLException e) {e.printStackTrace();}return number;}

/*** @param id 这个id 就是表中，每次插入数据，自己递增的id 字段*/@Overridepublic ArrayList<MyBean> queryId(int id) {ArrayList<MyBean> list = null;

try {MyBean myBean = dao.queryForId(id);if (myBean != null) {list = new ArrayList<>();list.add(myBean);}return list;} catch (SQLException e) {e.printStackTrace();}return list;}

@Overridepublic ArrayList<MyBean> queryAll() {ArrayList<MyBean> list = null;try {list = (ArrayList<MyBean>) dao.queryForAll();

if (list != null) {return list;}} catch (SQLException e) {e.printStackTrace();}return list;}

public boolean delteTables(Context context, String DBname) {//?????return false;}

/*** 这个方法可以的*/public boolean delteDatabases(Context context, String DBname) {return context.deleteDatabase(DBname);}

}

五：测试

源码下载地址

参考文章：

● Android快速开发–使用ORMLite操作数据库

●  鸿洋的博客：

●  Android ORMLite 框架的入门用法

●  Android 快速开发系列 ORMLite 框架最佳实践

●  SQL 语法

●  SQL UPDATE 语句

●  OrmLite 官网