JAVA 建立 + DAO包 + 实现 +《增删改查》+ 方法调用

public class sqlopenhelper_ {
    private Myhelper myhelper;

    public sqlopenhelper_(Myhelper myhelper) {
        this.myhelper = myhelper;
    }


    //添加
    public void Insertdata(String name1,String jsons1){
        //得到可读的数据库
        SQLiteDatabase database = myhelper.getWritableDatabase();
        //先删除
        database.delete("yingying", "name=?", new String[]{name1});
        //添加字段
        ContentValues values = new ContentValues();
        values.put("name",name1);
        values.put("jsons",jsons1);
        long yingying = database.insert("yingying", null, values);

    }
     //查询方法
    public String Selectdata(String name1){
        //设置变量
         String data="";
        //得到可读的数据库
        SQLiteDatabase database1 = myhelper.getWritableDatabase();
        //根据条件查询数据库
        Cursor cursor = database1.query("yingying", null, "name=?", new String[]{name1}, null, null, null);
        while (cursor.moveToNext()){
             data = cursor.getString(cursor.getColumnIndex("jsons"));
        }

        return data;
    }
}