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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。 <M>#qd@c  
插入排序:  RA~_]Hk  
@f'AWeJ2  
package org.rut.util.algorithm.support; ;@O(z*14@  
%w%zv2d  
import org.rut.util.algorithm.SortUtil; {8i}Ow  
/** L`bo#,eg6  
* @author treeroot ~l4Q~'  
* @since 2006-2-2 Cj=J;^vf  
* @version 1.0 "lb\c  
*/ 6!o/~I#  
public class InsertSort implements SortUtil.Sort{ h@/>?Va  
LQ|<3]  
/* (non-Javadoc) Ae3#>[]{  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9 &[\*{  
*/ '.xkn{c  
public void sort(int[] data) { {kv4g\a;  
int temp; 3g+ \? L-c  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); s-o~@(r6  
} 2f /bEpi  
} |O^V)bZmx  
}  pe|\'<>i  
akY6D]M  
} -hm 9sNox  
t"FRLC  
冒泡排序: 3pzOt&T|w  
m';|}z'  
package org.rut.util.algorithm.support; ,7/\&X<`B  
QTJrJD  
import org.rut.util.algorithm.SortUtil; ol1AD: Ho  
]dQZ8yVK  
/** *,_2hvlz  
* @author treeroot y& Gw.N}<r  
* @since 2006-2-2 A` oa|k!U  
* @version 1.0 sV;qpDXX  
*/ 7YSuB9{M  
public class BubbleSort implements SortUtil.Sort{ ]lC4+{V  
<4SF~i  
/* (non-Javadoc) ~n)]dFy  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) eq7C]i rH  
*/ W>UjUq);  
public void sort(int[] data) { ">0 /8]l  
int temp; 9 ?[4i'  
for(int i=0;i for(int j=data.length-1;j>i;j--){ rUhWZta  
if(data[j] SortUtil.swap(data,j,j-1); )Ep@$Gv|S  
} (p'/p  
} 0!)U *+j,  
} -U&098}<K  
} qrOB_Nz  
!k ;[^>  
} ',<{X (#(  
P[r}(@0rJ  
选择排序: ~p0 e=u  
E%KC'T N^D  
package org.rut.util.algorithm.support; 1"N/ZKF-x  
oTZo[T@zRx  
import org.rut.util.algorithm.SortUtil; hlt9x.e.A  
B&to&|jf  
/** BD<rQmfA^  
* @author treeroot k{!iDZr&f,  
* @since 2006-2-2 $XtV8  
* @version 1.0 GXGN;,7EV  
*/ kvY} yw7  
public class SelectionSort implements SortUtil.Sort { :ga 9Db9P  
9iiU,}M`j  
/* 8Fyc#Xo8  
* (non-Javadoc) |v,}%UN2  
* ](idf(j  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 99=[>Ck)G  
*/ GA}hp%  
public void sort(int[] data) { kjQIagw  
int temp; })Ix .!p  
for (int i = 0; i < data.length; i++) { eU<]h>2  
int lowIndex = i; w/)e2CH  
for (int j = data.length - 1; j > i; j--) { ;w>Q{z  
if (data[j] < data[lowIndex]) { !^rITiy  
lowIndex = j; gt(X!iN]  
} Ss*Lg K_  
} m(Pz7U.Q  
SortUtil.swap(data,i,lowIndex); 3g4vpKg6c  
} *=r@vQ  
} O p!  
<<~lV5  
} ^*j[&:d  
j58Dki->.  
Shell排序: T(t <Ay?c  
[0( E>vm  
package org.rut.util.algorithm.support; {3_Ffsg`  
Wl@0TUK  
import org.rut.util.algorithm.SortUtil; S S7D1  
IX > j8z[  
/** 96^1Ivd  
* @author treeroot `*.r'k2R  
* @since 2006-2-2 |^>L`6uo  
* @version 1.0 ^$ g],PAY  
*/ W,L>'$#pM  
public class ShellSort implements SortUtil.Sort{ U/ v"?pg[  
Lk$Je O  
/* (non-Javadoc) ?et0W|^k  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) OdtbVF~  
*/ Vf#oKPP1  
public void sort(int[] data) { !]UU;8h~  
for(int i=data.length/2;i>2;i/=2){ NG4eEnic!a  
for(int j=0;j insertSort(data,j,i); rZwf%}  
} 4rGO8R  
} 4OB~h]Vc  
insertSort(data,0,1); y"%iD`{  
} QmDhZ04f  
Z:r$;`K/  
/** oqQ?2k<@  
* @param data 3<Pyr-z h  
* @param j gXJ19zB+  
* @param i X8NO;w@z#  
*/ 1GyAQHx,  
private void insertSort(int[] data, int start, int inc) { K%.YNVHHC  
int temp; 7J </7\  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); D{3 x}5  
} HquB*=^xh  
} \I`=JKYT  
} 6>P  
xhp-4  
} !Barc ,kA  
C$]%1<-Iv]  
快速排序: ,sQ0atk7ma  
U- UV<}  
package org.rut.util.algorithm.support; 2rE~V.)%  
H8Z Z@@ qm  
import org.rut.util.algorithm.SortUtil; !EyGJa[ i  
yScov)dp(  
/** .,BD DPFB  
* @author treeroot 0'`8HP  
* @since 2006-2-2 iM Y0xf8l  
* @version 1.0 '"G %0y  
*/ +h9l %Pz  
public class QuickSort implements SortUtil.Sort{ ""U?#<}GD  
MSm`4lw  
/* (non-Javadoc) 8=zM~v)   
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) p.W*j^';Q  
*/ W@uH!n>k  
public void sort(int[] data) { 3Wtv+L7Br  
quickSort(data,0,data.length-1); &>wce 5uV  
} Jr*S2 z<*  
private void quickSort(int[] data,int i,int j){ U{:(j5m  
int pivotIndex=(i+j)/2; ky lrf4=  
file://swap ^|hRu{Q W  
SortUtil.swap(data,pivotIndex,j); z)?#UdBQv  
%NAFU /&  
int k=partition(data,i-1,j,data[j]); u^4"96aXJ  
SortUtil.swap(data,k,j); s poWdRM2  
if((k-i)>1) quickSort(data,i,k-1); (fI&(";t  
if((j-k)>1) quickSort(data,k+1,j); p'w"V6k('~  
U!-+v:SF  
} KE)D =P  
/** 3I{ta/(  
* @param data )su <Ji*  
* @param i P.H/H04+  
* @param j TF iM[  
* @return &s}@7htE  
*/ )DZ-vnZ#t0  
private int partition(int[] data, int l, int r,int pivot) { ?3E_KGI  
do{ ^J}$y7  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); ~m;MM)_V  
SortUtil.swap(data,l,r); +68K[s,FD  
} ~)_ ?:.Da  
while(l SortUtil.swap(data,l,r); "!_ 4%z-  
return l; 94k)a8-!  
} '|A5a+[  
xvz5\s|b  
} q9]^+8UP  
{ALBmSapK"  
改进后的快速排序: A%czhF  
meVVRFQ2+  
package org.rut.util.algorithm.support; QmkC~kK1.  
>7Sl( UY-  
import org.rut.util.algorithm.SortUtil; 6+f>XL#w  
36A.h,~  
/** E{]|jPdr  
* @author treeroot 'Tan6 Qa  
* @since 2006-2-2 mEc;-b f  
* @version 1.0 $CYpO}u#  
*/ Wj{Rp{}3  
public class ImprovedQuickSort implements SortUtil.Sort { : R*^Izs=  
UE$[;Zg  
private static int MAX_STACK_SIZE=4096; ?e|:6a+[f  
private static int THRESHOLD=10;  '?>O  
/* (non-Javadoc) LU IT=+  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) R&|)y:bg|  
*/ u$@I/q,ou  
public void sort(int[] data) { AqKx3p6  
int[] stack=new int[MAX_STACK_SIZE]; @7Rt[2"e  
08n%% F  
int top=-1; a):Run  
int pivot; zhm!sMlO  
int pivotIndex,l,r; MfpWow-#{  
V1b_z  
stack[++top]=0; O> ^~SO  
stack[++top]=data.length-1; D>#v 6XI  
VOK$;s'9}  
while(top>0){ f;XsShxr  
int j=stack[top--]; SoGLsO+R  
int i=stack[top--]; f]6` GsE  
 |ukdn2Q  
pivotIndex=(i+j)/2; bz@=zLBt  
pivot=data[pivotIndex]; 'GdlqbX(%  
J ]^gF|  
SortUtil.swap(data,pivotIndex,j); {S: 3 FI  
uV$d7(N}"  
file://partition &*:)5F5  
l=i-1; Fh4w0u*Q  
r=j; 64?$TT  
do{ 0B:{4Lsn&  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); |3lAye,t)a  
SortUtil.swap(data,l,r); <UHWy&+z&  
} #LyjJmQ  
while(l SortUtil.swap(data,l,r); B+$Q"  
SortUtil.swap(data,l,j); >sS:x,-  
a1sLRqo8  
if((l-i)>THRESHOLD){ 7<'i#E~  
stack[++top]=i; :-@P3F[0  
stack[++top]=l-1; 6{r[Dq  
} /ZN5WK  
if((j-l)>THRESHOLD){ 86 /i~s  
stack[++top]=l+1; ieLN;)Iy^  
stack[++top]=j; c&?H8G)x  
} GZ[h`FJg/  
E=~WQ13Q  
} :yFCp@&  
file://new InsertSort().sort(data); >s?;2T2"yx  
insertSort(data); 1Kf t?g  
} _ ,1kcDu  
/** k<";t  
* @param data LmdV@gR  
*/ x<7` 109]  
private void insertSort(int[] data) { U*U )l$!  
int temp; y\|\9Q%D  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); Gz5@1CF  
} RIqxM  
} v6Wf7)d/1  
} VRP.tD  
0bL=l0N$W  
} UT7lj wT  
 k*6eZ7  
归并排序: N$\5%  
Wv/5#_  
package org.rut.util.algorithm.support; ea}KxLC`,  
A-!qO|E[-  
import org.rut.util.algorithm.SortUtil; R$m?&1K  
fTtSx_}3H  
/** vjRD?kF  
* @author treeroot 6}lEeMRW  
* @since 2006-2-2 Q>g$)-8  
* @version 1.0 F(fr,m3  
*/ H0NyxG<  
public class MergeSort implements SortUtil.Sort{ !e"m*S.(6{  
ZoReyY2  
/* (non-Javadoc) PCnJ2  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) QD VA*6F  
*/ D)cwttH  
public void sort(int[] data) { >mSl~.I2  
int[] temp=new int[data.length]; #@"rp]1xv  
mergeSort(data,temp,0,data.length-1); _\[JMhd}  
} neH"ks5  
+Z(VWu6  
private void mergeSort(int[] data,int[] temp,int l,int r){  #X_M  
int mid=(l+r)/2; uQ+$HzxX  
if(l==r) return ; V)jhyCL  
mergeSort(data,temp,l,mid); JN-8\ L  
mergeSort(data,temp,mid+1,r); ' *C)S  
for(int i=l;i<=r;i++){ \eN/fTPm  
temp=data; 0DT2qM[,  
} Px&Mi:4tG  
int i1=l; <$6E r  
int i2=mid+1; *0ntx$M-w  
for(int cur=l;cur<=r;cur++){ _u5U> w  
if(i1==mid+1) F>R)~;Ja  
data[cur]=temp[i2++]; LB+=?Mz V  
else if(i2>r)  :!FwF65  
data[cur]=temp[i1++]; <q=B(J'  
else if(temp[i1] data[cur]=temp[i1++]; EPnB%'l\c  
else t^;Fq{>  
data[cur]=temp[i2++]; SntYi0,`  
} *heQ@ww  
} O~]G(TMs8W  
&}=,8Gt1G  
} {moNtzE;  
hrt-<7U  
改进后的归并排序: u#|Jl|aT  
_Hj,;Z  
package org.rut.util.algorithm.support; ~,7R*71  
k5 l~  
import org.rut.util.algorithm.SortUtil; ?+L6o C.;  
YWF<2l.  
/** v]S8!wU  
* @author treeroot x"De 9SB  
* @since 2006-2-2 `sC8ro@Fm  
* @version 1.0 ;KN@v5`p  
*/ 3_/d=ZI\  
public class ImprovedMergeSort implements SortUtil.Sort { zKT<QM!`  
8}@a?QS(&  
private static final int THRESHOLD = 10; <9ph c  
e 3oIoj4o  
/* K#m o+n5-;  
* (non-Javadoc) {u3u%^E;R  
* r{&"]'/X  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "// 8^e%Xo  
*/ LK~ 0ck7  
public void sort(int[] data) { .?:~s8kB  
int[] temp=new int[data.length]; }1 ^.A84a  
mergeSort(data,temp,0,data.length-1); M/;g|J jM  
} .1}(Bywm5  
j pV  
private void mergeSort(int[] data, int[] temp, int l, int r) { 8;rS"!qM  
int i, j, k; {4*%\?c,n  
int mid = (l + r) / 2; FM];+d0  
if (l == r) b=EZtk6>  
return; 9Ua@-  
if ((mid - l) >= THRESHOLD) }$U6lh/Ep  
mergeSort(data, temp, l, mid); ]h@:Y]  
else 1t'\!  
insertSort(data, l, mid - l + 1); "rJL ^ \r  
if ((r - mid) > THRESHOLD) ')<$AMy1  
mergeSort(data, temp, mid + 1, r); 5o #8DIal  
else 5P x_vtqP  
insertSort(data, mid + 1, r - mid); OD|&qsbL  
]uf_"D  
for (i = l; i <= mid; i++) { %R>MSSjvr  
temp = data; GjBQxn  
} R?I3xb  
for (j = 1; j <= r - mid; j++) { +__Rk1CVh  
temp[r - j + 1] = data[j + mid]; cKAl 0_[f"  
} na)ceN2h  
int a = temp[l]; x #g,l2_!  
int b = temp[r]; Q5JeL6t  
for (i = l, j = r, k = l; k <= r; k++) { +^:K#S9U  
if (a < b) { :{2$X|f 3  
data[k] = temp[i++]; V" 73^  
a = temp; *^ BE1-  
} else { ~qH@Kz\%  
data[k] = temp[j--]; ^\%%9jY  
b = temp[j]; D%v yO_k  
} Wd# 6Y}:  
} o 8U2vMH  
} 'Ud5;?{  
U>XGJQ<NS  
/** L_|Y_=r."  
* @param data @hPbD?)M  
* @param l Ja1*a,],L  
* @param i mHy]$Z  
*/ 2BY:qz%:  
private void insertSort(int[] data, int start, int len) { lhU#/}Z  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); &D#v0!e~x  
} X(9Ff=0.~  
} KNhH4K2iP8  
} DGnswN%n1  
} lLv0lf  
{[+gM?  
堆排序: cAS5&T<  
HS7!O  
package org.rut.util.algorithm.support; EC0auB7G  
r{_'2Z_i  
import org.rut.util.algorithm.SortUtil; <[bDNe["?  
I\_R& v  
/** ;z#9>99rH  
* @author treeroot YX(%jcj*  
* @since 2006-2-2 ~S9nLb:O{  
* @version 1.0 C Qebb:y  
*/ |%}?*|-  
public class HeapSort implements SortUtil.Sort{ 4=Zlsp  
_1~Sj*  
/* (non-Javadoc) ` {p5SYj  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) (@Bm2gH  
*/ ]jYM;e  
public void sort(int[] data) { >J1o@0tk  
MaxHeap h=new MaxHeap(); _%]H}N Q  
h.init(data); %M`&}'6'  
for(int i=0;i h.remove(); P?F:x=@'|  
System.arraycopy(h.queue,1,data,0,data.length); !8$}]uWP  
} moGbBkO  
[*(MI 9WM  
private static class MaxHeap{ V*N9D>C  
=|V3cM4'  
void init(int[] data){ shB(kb{{  
this.queue=new int[data.length+1]; 2%I:s6r  
for(int i=0;i queue[++size]=data; t9}XO M*  
fixUp(size); S^u!/ =&  
} v3p..A~XZ.  
} j.K yPWO  
,\M'jV"S K  
private int size=0; ?g&]*zc^\  
{SJLM0=Z  
private int[] queue; c?d#Bj ?  
*VU Xw@  
public int get() { *=8)]_=f  
return queue[1]; +2?[=g4;}  
} ?/\;K1c p  
C"}x=cK  
public void remove() { ! 9e>J  
SortUtil.swap(queue,1,size--); d dPJx<  
fixDown(1); z}%to0W  
} 8Xr3q eh+  
file://fixdown K;95M^C\O*  
private void fixDown(int k) { ;u%hwlo  
int j; #%5>}$  
while ((j = k << 1) <= size) { :/3`+&T^/  
if (j < size %26amp;%26amp; queue[j] j++; v#6.VUAw  
if (queue[k]>queue[j]) file://不用交换 M3''xrpC  
break; |lv4X }H  
SortUtil.swap(queue,j,k); >@X=E3  
k = j; cA*%K[9  
} {MS&t09Wh  
} P+/L, u  
private void fixUp(int k) { gSC@uf  
while (k > 1) { Pzqgg43Xf  
int j = k >> 1; Z`W.(gua  
if (queue[j]>queue[k]) ;KhYh S(q  
break; buoz La  
SortUtil.swap(queue,j,k); .q=X58tHu  
k = j; m H?hzxa+  
} `XnFc*L 1  
} } 8svd#S+  
17GyE=Uu  
} oTL "]3`'  
,uw &)A  
} ka hv1s-  
?z6C8T~+  
SortUtil: L=$P  
fkYQ3d,`  
package org.rut.util.algorithm; OV[-m;h|  
Zwc b5\Q  
import org.rut.util.algorithm.support.BubbleSort; ovl@[>OB  
import org.rut.util.algorithm.support.HeapSort; l20q(lb  
import org.rut.util.algorithm.support.ImprovedMergeSort; I}:/v$btM  
import org.rut.util.algorithm.support.ImprovedQuickSort; *n47.(a2i  
import org.rut.util.algorithm.support.InsertSort; 9 7g\nq<  
import org.rut.util.algorithm.support.MergeSort; 'fB`e]_  
import org.rut.util.algorithm.support.QuickSort; dcA0k  
import org.rut.util.algorithm.support.SelectionSort; pxN'E;P-  
import org.rut.util.algorithm.support.ShellSort; P$Dr6;  
qHj4`&  
/** U t%ie=c  
* @author treeroot ,kP{3.#Q  
* @since 2006-2-2 ^\!^#rO  
* @version 1.0 RHxd6Gs"  
*/ o] nQo?!  
public class SortUtil { C{Fo^-3  
public final static int INSERT = 1; xP*RH-<  
public final static int BUBBLE = 2; ~q/`Z)(yc  
public final static int SELECTION = 3; *cd9[ ~  
public final static int SHELL = 4; 5mV'k"Om#"  
public final static int QUICK = 5; :+6m<?R)T  
public final static int IMPROVED_QUICK = 6; 1^,rS  
public final static int MERGE = 7; ZpdM[\Q-  
public final static int IMPROVED_MERGE = 8; =}L[/RL  
public final static int HEAP = 9; ~2qFA2  
!>+ 0/   
public static void sort(int[] data) { e0q a ~5  
sort(data, IMPROVED_QUICK); :sn}D~  
} `S VR_  
private static String[] name={ /v8qT'$^  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 6e*J Cf>  
}; Y,a.9AWw)  
^mGTZxO  
private static Sort[] impl=new Sort[]{ _V;J7Vz  
new InsertSort(), wjl? @K  
new BubbleSort(), Kb}N!<Z*  
new SelectionSort(), 4b#YpK$7U  
new ShellSort(), }A#FGH +  
new QuickSort(), Y8d%L;b[D  
new ImprovedQuickSort(), YONg1.^!(  
new MergeSort(), JmBYD[h,  
new ImprovedMergeSort(), kN_LD-  
new HeapSort() h$k(|/+  
}; T7,tJk,(  
j_{gk"2:d`  
public static String toString(int algorithm){ u]}Xq{ZN  
return name[algorithm-1]; W=DQ6.   
} MDlC U  
>):b AfI  
public static void sort(int[] data, int algorithm) { R38 w!6{  
impl[algorithm-1].sort(data); l})uYae/  
} n;MoMGnPh,  
a5)+5  
public static interface Sort { B<o i,S  
public void sort(int[] data); ]6nF>C-C  
} VTF),e!  
)j$Bo{  
public static void swap(int[] data, int i, int j) { -H]svOX  
int temp = data; ^yX W.s  
data = data[j]; :!|xg! |y  
data[j] = temp; ( R0   
} H'Po  
} LWW0lG!_F  
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