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[JAVA]用Java实现的各种排序

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用Java语言实现的各种排序,包括插入排序、冒泡排序、选择排序、Shell排序、快速排序、归并排序、堆排序、SortUtil等。 $[[?;g  
插入排序: `-4'/~G  
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package org.rut.util.algorithm.support; z(+&wa  
@zo7.'7P   
import org.rut.util.algorithm.SortUtil; !6M Bxg>  
/** G@9u:\[l  
* @author treeroot Yg/}ghF\  
* @since 2006-2-2 S"zk!2@C  
* @version 1.0 {{32jU7<  
*/ I6+2>CUGo  
public class InsertSort implements SortUtil.Sort{ Nu@5 kwH  
y`4{!CEyLW  
/* (non-Javadoc) Z(p*Z,?u  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ~F;CE"3A  
*/ !K[/L< Kv  
public void sort(int[] data) { {&-#s#&  
int temp; O16r!6=-n  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); [9OSpq  
} 7Re-5vz R  
} E4r.ky`#~  
} 6a*83G,k  
\b$<J.3  
} f3G1r5x  
oCVku:.  
冒泡排序: ll%G!VR  
I+|uU g5  
package org.rut.util.algorithm.support; T^]7R4 Fg  
ys%zlbj[  
import org.rut.util.algorithm.SortUtil; qEQAn/&  
wX0l?xdI  
/**  MGQ,\55"  
* @author treeroot =2%VZE7Vm  
* @since 2006-2-2 ePEe?o4;  
* @version 1.0 \,R!S/R#  
*/ !MoOKW  
public class BubbleSort implements SortUtil.Sort{ - IU4#s  
ul@3 Bt  
/* (non-Javadoc) RDJ+QOVKg  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 26.)Ur<F  
*/ :3^dF}>  
public void sort(int[] data) {  q>-R3HB  
int temp; 1[-vD=  
for(int i=0;i for(int j=data.length-1;j>i;j--){ cKjRF6w  
if(data[j] SortUtil.swap(data,j,j-1); 2Lfah?Tx~C  
} uE`r/=4  
} BSgTde|3y  
} 3+(z_!Qh  
} 1k[GuG%/K  
rslvsS:  
} SE)nD@:  
8KMv Ac  
选择排序: E(4w5=8TI  
(.?ZKL  
package org.rut.util.algorithm.support; sn"fK=,#g  
[b/o$zR  
import org.rut.util.algorithm.SortUtil; ,h&a9:+i  
&RO7{,`  
/** Wp[9beI*M  
* @author treeroot T SjI z5  
* @since 2006-2-2 {kL&Rv%'  
* @version 1.0 f%XJ;y\,9H  
*/ h5GU9M  
public class SelectionSort implements SortUtil.Sort { OlY$ v@|  
0V`[Zgf  
/* >c~RI7uu  
* (non-Javadoc) ?djQZ *  
* n]yEdL/1  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) BBnq_w"a  
*/ A@$kLex  
public void sort(int[] data) { "9XfQ"P  
int temp; (=c1  
for (int i = 0; i < data.length; i++) { =&vFVIhWcf  
int lowIndex = i; =Op+v"  
for (int j = data.length - 1; j > i; j--) { 6 BAW  
if (data[j] < data[lowIndex]) { 4W;S=#1  
lowIndex = j; ~OypE4./1  
} h<x4YB5Mj  
} RMP9y$~3pU  
SortUtil.swap(data,i,lowIndex); 2SG$LIV 9Y  
} 7L3ik;>  
} |+}G|hx@9  
%j+xgX/&  
} Hd &{d+B  
p&Ed\aQ%z;  
Shell排序: m3.sVI0I  
}dYBces  
package org.rut.util.algorithm.support; 1m@^E:w  
BVpO#c~I  
import org.rut.util.algorithm.SortUtil; X+82[Y,mB.  
T!|=El>  
/** 6.c^u5;  
* @author treeroot 0 n vSvk  
* @since 2006-2-2 "r'ozf2 \  
* @version 1.0 cg{AMeW  
*/ Z`Z5sj 4{  
public class ShellSort implements SortUtil.Sort{ bC6oqF'#  
Jxl6a:  
/* (non-Javadoc) J'T=q/  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) V 9;[M;  
*/ z-T{~{q  
public void sort(int[] data) { #& ?g %'  
for(int i=data.length/2;i>2;i/=2){ +.yT/y"  
for(int j=0;j insertSort(data,j,i); >I"V],d!6  
} B.dT)@Lx0  
} j\&pej  
insertSort(data,0,1); H17-/|-;0!  
} mY7>(M{  
CH#k(sy  
/** B&?sF" Y  
* @param data s Be7"^  
* @param j OF U/gaO~  
* @param i EHf\L  
*/ /j2H A^GT  
private void insertSort(int[] data, int start, int inc) { |CFRJN-J"  
int temp; *m+BuGt|  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); Wr?'$:  
} 0Q5^C!K  
} cmwPuK$  
} 2{|$T2?e  
rf &M!d}!  
} |I;$M;'r&  
gb|Q%LS9R  
快速排序: 07v!Zj  
PJ4(}a  
package org.rut.util.algorithm.support; SGL|Ck  
5s{j = .O  
import org.rut.util.algorithm.SortUtil; -V.d?A4"  
oXsL9,  
/** G\d$x4CVGc  
* @author treeroot ~wm;;#_O  
* @since 2006-2-2 t<iEj"5  
* @version 1.0 :iWS\G^ U  
*/ a?h*eAAc.  
public class QuickSort implements SortUtil.Sort{ Q n)d2-<  
OWq'[T4  
/* (non-Javadoc) 1Tp/MV/>  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) `_ %S  
*/ KL,/2 (  
public void sort(int[] data) { hB;VCg8  
quickSort(data,0,data.length-1); ^"\s eS  
} +EXJ\wy  
private void quickSort(int[] data,int i,int j){ T4/fdORS  
int pivotIndex=(i+j)/2; R7 jmv n  
file://swap `O?T.p)   
SortUtil.swap(data,pivotIndex,j); PQmq5N6  
9# 4Y1LS)  
int k=partition(data,i-1,j,data[j]); @oP_;G  
SortUtil.swap(data,k,j); )m3Uar  
if((k-i)>1) quickSort(data,i,k-1); e>rRTN  
if((j-k)>1) quickSort(data,k+1,j); N7r_77%m0  
r;>+)**@vl  
} u|#>32kV  
/** #hfuH=&oh  
* @param data /'2O.d0}.  
* @param i ] Wy)   
* @param j g1E~+@  
* @return 6d[_G$'nk  
*/ /PBaIoJE  
private int partition(int[] data, int l, int r,int pivot) { n"PJ,ao  
do{ Gl %3XdU  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); Di_2Plo)4  
SortUtil.swap(data,l,r); moj ]j`P5a  
} D%mXA70  
while(l SortUtil.swap(data,l,r); f*{ YFg?*&  
return l; _mvxsG  
} 5<pftTcZ  
<:FP4e "(  
} jxa D&4Fs8  
#o/ H~Iv  
改进后的快速排序: lE8&..~l$+  
>7`<!YJkK  
package org.rut.util.algorithm.support; X=JmF97  
/v|"0  
import org.rut.util.algorithm.SortUtil; @$"J|s3M  
u?Tpi[ #  
/** r)9Dy,  
* @author treeroot Xv <G-N4  
* @since 2006-2-2 FsB^CxVg  
* @version 1.0 hv6@Jr3  
*/  |{* }|  
public class ImprovedQuickSort implements SortUtil.Sort { 5erc D  
(`>voi<^  
private static int MAX_STACK_SIZE=4096; +MbIB&fRCB  
private static int THRESHOLD=10; o*x*jn:hm  
/* (non-Javadoc) &C im!I  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 6$a$K,dZ  
*/ _zt1 9%Wg  
public void sort(int[] data) { cfox7FmW  
int[] stack=new int[MAX_STACK_SIZE]; x^|Vaf  
KIA 2"KbjG  
int top=-1; <^b7cOFQ  
int pivot; & gJV{V5Ay  
int pivotIndex,l,r; n,eJ$2!J  
50TA :7  
stack[++top]=0; -LDCBc"  
stack[++top]=data.length-1;  nVu&/  
SvN9aD1  
while(top>0){ ^_5L"F]sP  
int j=stack[top--]; A7! g  
int i=stack[top--]; svelYe#9z  
GU't%[  
pivotIndex=(i+j)/2; 1Gt/Tq$_b  
pivot=data[pivotIndex]; AM"Nn L"  
6Ao%>;e*  
SortUtil.swap(data,pivotIndex,j); H/M Au7  
V._6=ZJ  
file://partition !3mA 0-!+  
l=i-1; gH2,\z`[4  
r=j; 6.5T/D*TT  
do{ oLWJm  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); KbL V' %D  
SortUtil.swap(data,l,r); VIP7OHJh  
} |/g W_;(  
while(l SortUtil.swap(data,l,r); ZYf2XI(_"  
SortUtil.swap(data,l,j); i>EgG5iJ  
uE[(cko  
if((l-i)>THRESHOLD){ 2([2Pb3<"  
stack[++top]=i; L,d LE-L  
stack[++top]=l-1; 2L AYDaS  
} Ggh.dZI4  
if((j-l)>THRESHOLD){ $Vc~/>  
stack[++top]=l+1; r]W  
stack[++top]=j; t9&c E:n  
}  tvXW  
#jAqra._b  
} 2tROT][J%  
file://new InsertSort().sort(data); :{NC-%4o0  
insertSort(data); AamVms  
} i"|$(2  
/** ?ER-25S  
* @param data g}p;\o   
*/ @&D?e:|!U  
private void insertSort(int[] data) { vP7K9K x  
int temp; |QV!-LK  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); Kj=b[ e%  
} Soie^$ Y  
} p3/*fH98  
} /7!""{1\\  
9h/>QLx  
} GE>[*zN  
.^$YfTabq  
归并排序: !v]b(z`Y  
FWH}j0Gj|  
package org.rut.util.algorithm.support; >NB?& |  
sH[ -W-  
import org.rut.util.algorithm.SortUtil; _C\[DR0n  
++L?+^h  
/** 0A{/B/r   
* @author treeroot B2Xn?i3 l  
* @since 2006-2-2 H3{GmV8  
* @version 1.0 h7s; m  
*/ yqSs,vz  
public class MergeSort implements SortUtil.Sort{ DF6c|  
(H oqR  
/* (non-Javadoc) u*  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])  p!Eft/A(  
*/ (Qgde6  
public void sort(int[] data) { p;?*}xa  
int[] temp=new int[data.length]; _2btfY1U  
mergeSort(data,temp,0,data.length-1); +i\&6HGK;-  
} VL' fP2  
G8W#<1LE  
private void mergeSort(int[] data,int[] temp,int l,int r){ %AOIKK5  
int mid=(l+r)/2; `Q+moX  
if(l==r) return ; E,n}HiAz7V  
mergeSort(data,temp,l,mid); :b[`  v  
mergeSort(data,temp,mid+1,r); y/V%&.$o=  
for(int i=l;i<=r;i++){ $./bjV%  
temp=data; {{C`mgC  
} 7VK}Dy/Vvn  
int i1=l; bslrqUk_`=  
int i2=mid+1; k`".  
for(int cur=l;cur<=r;cur++){ "uLjIIl  
if(i1==mid+1) 5>6PH+Oq  
data[cur]=temp[i2++]; B= keBO](@  
else if(i2>r) k%[3Q>5iM  
data[cur]=temp[i1++]; (wc03,K^  
else if(temp[i1] data[cur]=temp[i1++]; E&yD8=vw  
else >hY" 3  
data[cur]=temp[i2++]; _WX#a|4h{  
} TwyM\9l7  
} Z%Z9oJ:  
@v\*AYr'M  
} I *c;H I  
* y^OV_n-8  
改进后的归并排序: gBu1QviU  
hVj NZ  
package org.rut.util.algorithm.support; 5q@LxDy,b  
"QoQ4r<|  
import org.rut.util.algorithm.SortUtil; P#v*TD'  
P?BGBbC  
/** $- +/$!  
* @author treeroot Ba\6?K  
* @since 2006-2-2 Qy#)Gxp  
* @version 1.0 K}[>T(0E  
*/ pIW I  
public class ImprovedMergeSort implements SortUtil.Sort { UDf9FnG}L  
KlK`;cr?  
private static final int THRESHOLD = 10; _DRrznaw  
F#xa`*AP  
/* ry};m_BY  
* (non-Javadoc) >Ps7I  
* 4eVI},  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) _F p>F  
*/ dQy>Nmfy  
public void sort(int[] data) { Hy{ Q#fq  
int[] temp=new int[data.length]; g. %  
mergeSort(data,temp,0,data.length-1); T0j2a &Pv  
} %;`>`j5  
Z.&\=qiY  
private void mergeSort(int[] data, int[] temp, int l, int r) { m$>iS@R  
int i, j, k; 1;u4X`8  
int mid = (l + r) / 2; v4?iOD  
if (l == r) lD;'tqaC  
return; x )5V.q  
if ((mid - l) >= THRESHOLD) BpAB5=M0  
mergeSort(data, temp, l, mid); =4C}{IL  
else )J/HkOj"V  
insertSort(data, l, mid - l + 1); gLj?Ys  
if ((r - mid) > THRESHOLD) @^nu #R  
mergeSort(data, temp, mid + 1, r); (g/7yO(s  
else  ~QG ?k  
insertSort(data, mid + 1, r - mid); U` R;P-  
pL oy  
for (i = l; i <= mid; i++) { <v]9lw'  
temp = data; #/J 'P[z  
} ^. X[)U  
for (j = 1; j <= r - mid; j++) { J$uM 03  
temp[r - j + 1] = data[j + mid];  SVP:D3)  
} #,f{Ok+  
int a = temp[l]; H;_yRUY9  
int b = temp[r]; {'3D1#SK  
for (i = l, j = r, k = l; k <= r; k++) { Uku5wPS  
if (a < b) { ayp b  
data[k] = temp[i++]; \,W.0#D8v4  
a = temp; &TN2 HZ-bJ  
} else { $7gB_o$zz  
data[k] = temp[j--]; H;vZm[\0N-  
b = temp[j]; HR{s&ho  
} ^^Lj I  
} %&] 1FhL  
} vgPUIxB@  
y]qsyR18i  
/** B#N7qoi  
* @param data NXoK@Y  
* @param l >Gd.&flSj  
* @param i _,; %mK  
*/ 1 tfYsg=O  
private void insertSort(int[] data, int start, int len) { wz#[:2  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); [STje8+V  
} = t+('  
} ,7/ _T\d<  
} *re 44  
} T&}Ye\%  
;<6"JP>0  
堆排序: N=fz/CD)I  
g^lFML| %  
package org.rut.util.algorithm.support; =y;@?=T  
EZAm)5:]A  
import org.rut.util.algorithm.SortUtil; 7>je6*(K  
JLUms  
/** rc~Y=m   
* @author treeroot ;~ee[W$1  
* @since 2006-2-2 (&Q)EBdm  
* @version 1.0 +{>.Sk'$  
*/ !A-;NGxE  
public class HeapSort implements SortUtil.Sort{ [}k|  
TNsg pJ?\  
/* (non-Javadoc) lZ a?Y@  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) pGk"3.ce  
*/ u[[/w&UV.,  
public void sort(int[] data) { 03"#J2b  
MaxHeap h=new MaxHeap(); .CmL7 5  
h.init(data); 5`yPT>*#m>  
for(int i=0;i h.remove(); S-,kI  
System.arraycopy(h.queue,1,data,0,data.length); R<j<. h  
} ScHlfk p  
It\BbG=  
private static class MaxHeap{ >C^/,/%v  
rG5i-'  
void init(int[] data){ ?1DUNZ6  
this.queue=new int[data.length+1]; E 8^sy*f  
for(int i=0;i queue[++size]=data; mS7E_A8  
fixUp(size); z (#Xca  
} EFNdiv$wF  
} e@+v9Bs]q  
]TfeBX6ST  
private int size=0; g1dmkX  
<[FS%2,0mb  
private int[] queue; 5~-}}F  
* S{\#s  
public int get() { `x< 0A  
return queue[1]; 5 2fO)!  
}  3:"AFV  
S#hu2\9D,  
public void remove() { 3liq9P_  
SortUtil.swap(queue,1,size--); %N1T{   
fixDown(1); !yk7HaP  
} |oFI[PE  
file://fixdown 8|Q4-VK<!  
private void fixDown(int k) { d)9PEtI  
int j; B ;;cbY  
while ((j = k << 1) <= size) { Do(P dF6A  
if (j < size %26amp;%26amp; queue[j] j++; +:b(%|  
if (queue[k]>queue[j]) file://不用交换 I(y`)$}  
break; >Ziy1Dp  
SortUtil.swap(queue,j,k); =^ gvZ| ]  
k = j; i"KL;t[1  
} (kdC1,E  
} JJ)y2  
private void fixUp(int k) { i{4'cdr?  
while (k > 1) { ./2Z?,  
int j = k >> 1; XZ!cW=bqS  
if (queue[j]>queue[k]) N.k+AQb  
break; \}n !yYh(  
SortUtil.swap(queue,j,k); -.^=Z!=M  
k = j; yr (g~MQ  
} 4$qNcMdz  
} $)4GCP  
)|MIWgfWN  
} ;}n|,g>  
'[ @F%  
} Cbazwq  
eR(\s_`  
SortUtil: sf<Q#ieTxY  
Ixyvn#ux )  
package org.rut.util.algorithm; Bd/} %4V\@  
i=x.tsJ:hB  
import org.rut.util.algorithm.support.BubbleSort; ?hP<@L6K  
import org.rut.util.algorithm.support.HeapSort; \IO$ +Guh  
import org.rut.util.algorithm.support.ImprovedMergeSort; {c&qB`y<.  
import org.rut.util.algorithm.support.ImprovedQuickSort; 5F% h>tqh  
import org.rut.util.algorithm.support.InsertSort; jM{(8aUG  
import org.rut.util.algorithm.support.MergeSort; ^n6)YX  
import org.rut.util.algorithm.support.QuickSort; |C&%S"*+D  
import org.rut.util.algorithm.support.SelectionSort; U#OWUZ  
import org.rut.util.algorithm.support.ShellSort; ,s\x]bh  
Qo]vpp^[#  
/** X v`2hf  
* @author treeroot XPGL3[w\V  
* @since 2006-2-2 0EcC  
* @version 1.0 t$ACQ*O  
*/ tCd{G c  
public class SortUtil { 5@GD} oAn6  
public final static int INSERT = 1; 3w[<cq.!  
public final static int BUBBLE = 2; wpAw/-/  
public final static int SELECTION = 3; LuQ"E4;nY%  
public final static int SHELL = 4; pE$|2v  
public final static int QUICK = 5; >_|Z{:z]d.  
public final static int IMPROVED_QUICK = 6; :|*Gnu  
public final static int MERGE = 7; /8 e2dw: \  
public final static int IMPROVED_MERGE = 8; s ZlJ/_g  
public final static int HEAP = 9; OHx,*}N  
/&S~+~]n  
public static void sort(int[] data) { fho=<|-  
sort(data, IMPROVED_QUICK); } IIK~d,  
} ,eZ;8W{G  
private static String[] name={ m~Kch~~]  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" hr )+Pk  
}; BG(R=, 7  
~.\73_M=A  
private static Sort[] impl=new Sort[]{ jh<TdvF2$  
new InsertSort(), ,6S_&<{  
new BubbleSort(), o|zrD~&$  
new SelectionSort(), _"R3N  
new ShellSort(), 7,) 67G;  
new QuickSort(), )*psDjZ7*  
new ImprovedQuickSort(), P5yJO97  
new MergeSort(), Bt |9%o06l  
new ImprovedMergeSort(), 4GMa5]Ft  
new HeapSort() 0A #9C09  
}; tdMP,0u  
0})7of  
public static String toString(int algorithm){ xI.Orpw  
return name[algorithm-1]; 4?P%M"\Iv  
} Fi?U)T+%+  
i?1js! 8  
public static void sort(int[] data, int algorithm) { qK 9L+i  
impl[algorithm-1].sort(data); j`[yoAH  
} kR`6s  
D:ql^{~  
public static interface Sort { -dc"N|.  
public void sort(int[] data); lOWB^uS%  
} c<JM1  
KZp,=[t  
public static void swap(int[] data, int i, int j) { XwKZv0ub  
int temp = data; kuKnJWv  
data = data[j]; 5WtQwN~  
data[j] = temp; (R;) 9I\  
} {UV<=R,E  
} Lic{'w&  
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