SQLite数据库的操作

SQLite以其体积小，功能比完善而得到众多android开发者的青睐，今天，主要来讨论数据库的一般操作。

//创建或打开数据库的方法
    public static void createOrOpenDatabase()
    {
        try
        {
            sld=SQLiteDatabase.openDatabase
            (
                    "/data/data/com.bn.lc/mydb", //数据库所在路径
                    null,                                 //CursorFactory
                    SQLiteDatabase.OPEN_READWRITE|SQLiteDatabase.CREATE_IF_NECESSARY //读写、若不存在则创建
            );
            
            //收入
            String sql01="create table if not exists Income" +
                         "(" +
                             "id INTEGER PRIMARY KEY AUTOINCREMENT," +
                             "idate char(10)," +
                             "isource Varchar(20)," +
                             "imoney Integer," +
                             "imemo Varchar(50)" +
                         ")";
            //收入类别
            String sql02="create table if not exists Scy" +     //收入类别
                         "("+
                             "icategory Varchar(10) PRIMARY KEY ," +
                             "says varchar(50)" +
                         ")";
            //花费
            String sql03="create table if not exists Spend" +
                         "(" +
                             "id INTEGER PRIMARY KEY AUTOINCREMENT," +
                             "idate char(10)," +
                             "isource Varchar(20)," +
                             "imoney Integer," +
                             "imemo Varchar(50)" +
                         ")";
            //支出
            String sql04="create table if not exists Zcy" +        //支出类别
                         "(" +
                             "icategory Varchar(10) PRIMARY KEY," +
                             "says Varchar(50)" +
                         ")";
            //个人信息
            String sql05="create table if not exists PersonDate" +
                         "(" +
                             "id INTEGER PRIMARY KEY AUTOINCREMENT," +
                             "isex char(1)," +
                             "idate varchar(10)," +
                             "iage varchar(2)," +
                             "iblood varchar(5)," +
                             "iprovince varchar(5)," +
                             "icity varchar(5)," +
                             "iemail varchar(15)," +
                             "ioldpwd varchar(6)" +
                         ")";
            sld.execSQL(sql01);
            sld.execSQL(sql02);
            sld.execSQL(sql03);
            sld.execSQL(sql04);
            sld.execSQL(sql05);
        }
        catch(Exception e)
        {
            e.printStackTrace();
        }
    } 

以上是建立、创建数据库。
下面讲解插入操作：

//类别维护插入方法
    public static void insertCategory(String str,String str0,String str1)  
    {
        try
        {
            String sql="insert into "+str0+" values('"+str+"','"+str1+"');";
            sld.execSQL(sql);
        }
        catch(Exception e)
        {
            e.printStackTrace();
        }
    } 

查询方法：

//类别维护查询的方法
    public static  List<String> queryCategory(String str)
    {
        List<String> addcategory=new ArrayList<String>();
        try
        {
            String sql="select * from "+str+";";
            Cursor cur=sld.rawQuery(sql, new String[]{});
            while(cur.moveToNext())
            {
                addcategory.add(cur.getString(0));
                addcategory.add(cur.getString(1));
            }
            cur.close();
        }
        catch(Exception e)
        {
            e.printStackTrace();
        }
        return addcategory;
    }
    

删除信息的方法：

 //类别的删除信息
    public static void deleteValuesFromTable(String tablename,String colname,String getstr)
    {
        try
        {
            String sql="delete from "+tablename+" where "+colname+"='"+getstr+"';";
            sld.execSQL(sql);
        }
        catch(Exception e)
        {
            e.printStackTrace();
        }
    }
    

日常信息插入：

//日常收入插入记录的方法
    public static void insert(String tableName)
    {      
        int money=Integer.parseInt(Lc_Activity.Imoney01);
        try
        {
            String sql="insert into '"+tableName+"' values(null,'"+Lc_Activity.Idate01+"'," +
                       "'"+Lc_Activity.Isource+"','"+money+"','"+Lc_Activity.Imemo+"')";
            
            sld.execSQL(sql);
        }
        catch(Exception e)
        {
            e.printStackTrace();
        }
    }
    

关闭数据库的方法：、

//关闭数据库的方法
    public static void closeDatabase()
    {
        try
        {
            sld.close();             
        }
        catch(Exception e)
        {
            e.printStackTrace();
        }
    }

最后，我建立了一个工具类，以后如果用到可以直接使用：

package com.bn.lc;
import java.util.ArrayList;
import java.util.List;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
public class DBUtil 
{
    public static SQLiteDatabase sld;
    public static Lc_Activity activity;
            
    //创建或打开数据库的方法
    public static void createOrOpenDatabase()
    {
        try
        {
            sld=SQLiteDatabase.openDatabase
            (
                    "/data/data/com.bn.lc/mydb", //数据库所在路径
                    null,                                 //CursorFactory
                    SQLiteDatabase.OPEN_READWRITE|SQLiteDatabase.CREATE_IF_NECESSARY //读写、若不存在则创建
            );
            
            //收入
            String sql01="create table if not exists Income" +
                         "(" +
                             "id INTEGER PRIMARY KEY AUTOINCREMENT," +
                             "idate char(10)," +
                             "isource Varchar(20)," +
                             "imoney Integer," +
                             "imemo Varchar(50)" +
                         ")";
            //收入类别
            String sql02="create table if not exists Scy" +     //收入类别
                         "("+
                             "icategory Varchar(10) PRIMARY KEY ," +
                             "says varchar(50)" +
                         ")";
            //花费
            String sql03="create table if not exists Spend" +
                         "(" +
                             "id INTEGER PRIMARY KEY AUTOINCREMENT," +
                             "idate char(10)," +
                             "isource Varchar(20)," +
                             "imoney Integer," +
                             "imemo Varchar(50)" +
                         ")";
            //支出
            String sql04="create table if not exists Zcy" +        //支出类别
                         "(" +
                             "icategory Varchar(10) PRIMARY KEY," +
                             "says Varchar(50)" +
                         ")";
            //个人信息
            String sql05="create table if not exists PersonDate" +
                         "(" +
                             "id INTEGER PRIMARY KEY AUTOINCREMENT," +
                             "isex char(1)," +
                             "idate varchar(10)," +
                             "iage varchar(2)," +
                             "iblood varchar(5)," +
                             "iprovince varchar(5)," +
                             "icity varchar(5)," +
                             "iemail varchar(15)," +
                             "ioldpwd varchar(6)" +
                         ")";
            sld.execSQL(sql01);
            sld.execSQL(sql02);
            sld.execSQL(sql03);
            sld.execSQL(sql04);
            sld.execSQL(sql05);
        }
        catch(Exception e)
        {
            e.printStackTrace();
        }
    } 
    
    //类别维护插入方法
    public static void insertCategory(String str,String str0,String str1)  
    {
        try
        {
            String sql="insert into "+str0+" values('"+str+"','"+str1+"');";
            sld.execSQL(sql);
        }
        catch(Exception e)
        {
            e.printStackTrace();
        }
    } 
    
    //类别维护查询的方法
    public static  List<String> queryCategory(String str)
    {
        List<String> addcategory=new ArrayList<String>();
        try
        {
            String sql="select * from "+str+";";
            Cursor cur=sld.rawQuery(sql, new String[]{});
            while(cur.moveToNext())
            {
                addcategory.add(cur.getString(0));
                addcategory.add(cur.getString(1));
            }
            cur.close();
        }
        catch(Exception e)
        {
            e.printStackTrace();
        }
        return addcategory;
    }
    
    //类别的删除信息
    public static void deleteValuesFromTable(String tablename,String colname,String getstr)
    {
        try
        {
            String sql="delete from "+tablename+" where "+colname+"='"+getstr+"';";
            sld.execSQL(sql);
        }
        catch(Exception e)
        {
            e.printStackTrace();
        }
    }
    
  //日常收入插入记录的方法
    public static void insert(String tableName)
    {      
        int money=Integer.parseInt(Lc_Activity.Imoney01);
        try
        {
            String sql="insert into '"+tableName+"' values(null,'"+Lc_Activity.Idate01+"'," +
                       "'"+Lc_Activity.Isource+"','"+money+"','"+Lc_Activity.Imemo+"')";
            
            sld.execSQL(sql);
        }
        catch(Exception e)
        {
            e.printStackTrace();
        }
    }
    
  //收入 支出查询
    public static  List<String> queryIncome(String tableName, int state)
    {
        List<String> IncomeSpeedSelect=new ArrayList<String>();
        try 
        { 
            if(state==1)
            {  //checkBox1 checkBox2 checkBox3都被选中的情况 
                String sql1="select * from '"+tableName+"' where " +
                    "idate between '"+Lc_Activity.Idate01+"' AND '"+Lc_Activity.Idate02+"' " +
                        "and imoney between '"+Integer.parseInt(Lc_Activity.Imoney01)+"'  " +
                            "and '"+Integer.parseInt(Lc_Activity.Imoney02)+"' " +
                                "and isource='"+Lc_Activity.Isource+"';";
                Cursor cur=sld.rawQuery(sql1, new String[]{});       
                while(cur.moveToNext())                               
                {
                    IncomeSpeedSelect.add(cur.getString(1));
                    IncomeSpeedSelect.add(cur.getString(2));
                    IncomeSpeedSelect.add(cur.getString(3));
                    IncomeSpeedSelect.add(cur.getString(4));
                }
                cur.close();
            }
            if(state==2)
            {//checkBox1 checkBox2 都被选中的情况 
                String sql1="select * from '"+tableName+"' where " +
                    "idate between '"+Lc_Activity.Idate01+"' AND '"+Lc_Activity.Idate02+"' " +
                        "and imoney between '"+Integer.parseInt(Lc_Activity.Imoney01)+"'  " +
                            "and '"+Integer.parseInt(Lc_Activity.Imoney02)+"' ;";
                Cursor cur=sld.rawQuery(sql1, new String[]{});       
                while(cur.moveToNext())                               
                {
                    IncomeSpeedSelect.add(cur.getString(1));
                    IncomeSpeedSelect.add(cur.getString(2));
                    IncomeSpeedSelect.add(cur.getString(3));
                    IncomeSpeedSelect.add(cur.getString(4));
                }
                cur.close();
            }
            if(state==3)
            {//checkBox1  checkBox3都被选中的情况 
                String sql1="select * from '"+tableName+"' where " +
                "idate between '"+Lc_Activity.Idate01+"' AND '"+Lc_Activity.Idate02+"' " +
                    "and isource='"+Lc_Activity.Isource+"';";
                Cursor cur=sld.rawQuery(sql1, new String[]{});       
                while(cur.moveToNext())                               
                {
                    IncomeSpeedSelect.add(cur.getString(1));
                    IncomeSpeedSelect.add(cur.getString(2));
                    IncomeSpeedSelect.add(cur.getString(3));
                    IncomeSpeedSelect.add(cur.getString(4));
                }
                cur.close();
            }
            if(state==4)
            {// checkBox2 checkBox3都被选中的情况 
                String sql1="select * from '"+tableName+"' " +
                   "where imoney between '"+Integer.parseInt(Lc_Activity.Imoney01)+"' " +
                         "and '"+Integer.parseInt(Lc_Activity.Imoney02)+"' " +
                                 "and isource='"+Lc_Activity.Isource+"';";
                Cursor cur=sld.rawQuery(sql1, new String[]{});       
                while(cur.moveToNext())                               
                {
                    IncomeSpeedSelect.add(cur.getString(1));
                    IncomeSpeedSelect.add(cur.getString(2));
                    IncomeSpeedSelect.add(cur.getString(3));
                    IncomeSpeedSelect.add(cur.getString(4));
                }
            cur.close();
            }
            if(state==5)
            {// checkBox1 都被选中的情况 
                String sql1="select * from '"+tableName+"' where " +
                    "idate between '"+Lc_Activity.Idate01+"' AND '"+Lc_Activity.Idate02+"' ;";
                Cursor cur=sld.rawQuery(sql1, new String[]{});       
                while(cur.moveToNext())                               
                {
                    IncomeSpeedSelect.add(cur.getString(1));
                    IncomeSpeedSelect.add(cur.getString(2));
                    IncomeSpeedSelect.add(cur.getString(3));
                    IncomeSpeedSelect.add(cur.getString(4));
                }
                cur.close();
            }
            if(state==6)
            {// checkBox2 都被选中的情况 
                String sql1="select * from '"+tableName+"' where " +
                "imoney between '"+Integer.parseInt(Lc_Activity.Imoney01)+"'" +
                     " and '"+Integer.parseInt(Lc_Activity.Imoney02)+"' ;";
                Cursor cur=sld.rawQuery(sql1, new String[]{});       
                while(cur.moveToNext())                               
                {
                    IncomeSpeedSelect.add(cur.getString(1));
                    IncomeSpeedSelect.add(cur.getString(2));
                    IncomeSpeedSelect.add(cur.getString(3));
                    IncomeSpeedSelect.add(cur.getString(4));
                }
                cur.close();
                
            }
            if(state==7)
            {// checkBox3 都被选中的情况 
                String sql1="select * from '"+tableName+"' where isource='"+Lc_Activity.Isource+"' ;";
                Cursor cur=sld.rawQuery(sql1, new String[]{});       
                while(cur.moveToNext())                               
                {
                    IncomeSpeedSelect.add(cur.getString(1));
                    IncomeSpeedSelect.add(cur.getString(2));
                    IncomeSpeedSelect.add(cur.getString(3));
                    IncomeSpeedSelect.add(cur.getString(4));
                }
                cur.close();    
            }
        }
        catch(Exception e)
        {
            e.printStackTrace();
        }
        return IncomeSpeedSelect;
    }

    //收入支出查询 只有表名
    public static List<String> queryTable(String tableName)
    {
        List<String> slist=new ArrayList<String>();
        try
        {
            String sql="select * from "+tableName+";";
            Cursor cur=sld.rawQuery(sql, new String[]{});       
            while(cur.moveToNext())                               
            {
                slist.add(cur.getString(1));
                slist.add(cur.getString(2));
                slist.add(cur.getString(3));
                slist.add(cur.getString(4));
            }
            cur.close(); 
        }
        catch(Exception e)
        {
            e.printStackTrace();
        }
        return slist;
    }
    
    //收入或支出的类别的查询
    public static List<String> getIsource(String tableName)
    {
        List<String> alist=new ArrayList<String>();
        try
        {
            String sql="select isource from "+tableName;
            Cursor cur=sld.rawQuery(sql, new String[]{});
            while(cur.moveToNext())                               
            {
                alist.add(cur.getString(0));
            }
            cur.close();
        }
        catch(Exception e)
        {
            e.printStackTrace();
        }
        return alist;
    }
    
    //获得对应表的同类的总和
    public static List<String> getSum(String tableName,int state)  
    {
        List<String> sumSelect=new ArrayList<String>();
        if(state==1)
        {
            try
            {
                String sql="select sum(imoney) from "+tableName+" " +
                    "where idate between '"+Lc_Activity.Idate01+"' AND '"+Lc_Activity.Idate02+"' ;";
                Cursor cur=sld.rawQuery(sql, new String[]{});
                while(cur.moveToNext())
                {
                     sumSelect.add(cur.getString(0));
                }
            }
            catch(Exception e)
            {
                e.printStackTrace();
            }
            return sumSelect;
        }
        if(state==2)
        {
            try
            {
                String sql="select sum(imoney) from "+tableName+" where isource= '"+Lc_Activity.Isource+"';";
                Cursor cur=sld.rawQuery(sql, new String[]{});
                while(cur.moveToNext())
                {
                     sumSelect.add(cur.getString(0));
                }
            }
            catch(Exception e)
            {
                e.printStackTrace();
            }
            return sumSelect;
        }
        if(state==3)
        {
            try
            {
                String sql="select sum(imoney) from '"+tableName+"' " +
                    "where (isource= '"+Lc_Activity.Isource+"') " +
                        "and idate between '"+Lc_Activity.Idate01+"' and '"+Lc_Activity.Idate02+"' ;";
                Cursor cur=sld.rawQuery(sql, new String[]{});
                while(cur.moveToNext())
                {
                     sumSelect.add(cur.getString(0));
                }
            }
            catch(Exception e)
            {
                e.printStackTrace();
            }
            return sumSelect;
        }
        
        return sumSelect;
    }

    //查询个人信息
    public static String getPassword()
    {
        String result=null;
        try
        {
            String sql="select Ioldpwd from PersonDate;";
            Cursor cur=sld.rawQuery(sql, new String[]{});  
             
            while(cur.moveToNext())                               
            {
                result=cur.getString(0);
                System.out.println(result);
            }
            cur.close();        
        }
        catch(Exception e)
        {
            e.printStackTrace();
        }
        return result;
    }
    
    //插入个人信息
    public static void InsertPersonDate()  
    {      
        try
        {
            String sql="insert into PersonDate values(1,'"+Lc_Activity.sexDate+"'," +
                       "'"+Lc_Activity.Idate01+"','"+Lc_Activity.Iage+"','"+Lc_Activity.bloodDate+"'," +
                       "'"+Lc_Activity.priovinceDate+"','"+Lc_Activity.cityDate+"','"+Lc_Activity.Iemail+"'," +
                       "'"+Lc_Activity.Ioldpwd+"');";
            sld.execSQL(sql);
        }
        catch(Exception e)
        {
            e.printStackTrace();
        }
    }
    
    //更改个人信息
    public static void UpdatePersonDate()  
    {      
        try
        {
            String sql="update PersonDate set isex='"+Lc_Activity.sexDate+"'," +
                       "idate='"+Lc_Activity.Idate01+"',iage='"+Lc_Activity.Iage+"'," +
                       "iblood='"+Lc_Activity.bloodDate+"'," +
                       "iprovince='"+Lc_Activity.priovinceDate+"',icity='"+Lc_Activity.cityDate+"'," +
                       "iemail='"+Lc_Activity.Iemail+"',ioldpwd='"+Lc_Activity.Inewpwd+"' where id=1;";
            sld.execSQL(sql);
        }
        catch(Exception e)
        {
            e.printStackTrace();
        }
    }

    //查询表中的数据
    public static List<String> getAllInformation(String time,String source,String money,String tableName)
    {
        List<String> slist=new ArrayList<String>();
        try
        {
            String sql="select * from "+tableName+" where idate='"+time+
                       "' and isource='"+source+"' and imoney='"+money+"';";
            Cursor cur=sld.rawQuery(sql, new String[]{});
            while(cur.moveToNext())                               
            {
                slist.add(cur.getString(0));
                slist.add(cur.getString(1));
                slist.add(cur.getString(2));
                slist.add(cur.getString(3));
                slist.add(cur.getString(4));
            }
            cur.close();        
        }
        catch(Exception e)
        {
            e.printStackTrace();
        }
        return slist;
    }
    
    //删除表中的某一条记录   (收入 支出查询详细信息的删除功能)
    public static void deleteFromTable(int id,String str)
    {
        try
        {
            String sql="delete from "+str+" where id="+id+";";
            sld.execSQL(sql);
        }
        catch(Exception e)
        {
            e.printStackTrace();
        }
    }
    //关闭数据库的方法
    public static void closeDatabase()
    {
        try
        {
            sld.close();             
        }
        catch(Exception e)
        {
            e.printStackTrace();
        }
    }
}