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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。 RZz?_1'  
插入排序: uz3cho'  
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package org.rut.util.algorithm.support; +R~]5Rxd  
}u^bTR?3  
import org.rut.util.algorithm.SortUtil; #]Vw$X_S  
/** `gl?y;xC  
* @author treeroot yCjc5d|tT  
* @since 2006-2-2  <$nPGz)}  
* @version 1.0 Q=Q+*oog  
*/ d!I%AlV  
public class InsertSort implements SortUtil.Sort{ `q}D#0  
]@U?hD  
/* (non-Javadoc) SqAz((  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) nDkG}Jk B!  
*/ (u?s@/e:`/  
public void sort(int[] data) { 5H._Q  
int temp; u$w.'lK  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); @5Z|e  
} {V[xBL <  
} $ DN.  
} U`*we43  
~D5 -G?%$"  
} }-[l)<F:  
0hS&4nW  
冒泡排序: IR/S`HD_  
k7Nx#%xx  
package org.rut.util.algorithm.support; oypLE=H  
LsR<r1KDJ  
import org.rut.util.algorithm.SortUtil; 2[w9#6ly  
{A}T^q!m]  
/** <(E)M@2  
* @author treeroot uz8eS'8  
* @since 2006-2-2 P0UR{tK  
* @version 1.0 caEIE0H~  
*/ 9^Xndo]y  
public class BubbleSort implements SortUtil.Sort{ +9HU&gQ3  
U'jmgHq  
/* (non-Javadoc) &wNr2PHd#  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) cJSNV*<  
*/ (0`rfYv5.R  
public void sort(int[] data) { QmBHD;Gf  
int temp; Qe~C}j%  
for(int i=0;i for(int j=data.length-1;j>i;j--){ #|\|G3Si %  
if(data[j] SortUtil.swap(data,j,j-1); I85wP}c(  
} 0+0 Y$;<  
} wW TuEM  
} PCCE+wC6  
} ~Dg:siw  
/8Lb_QH{  
} !UzE&CirV  
6~ET@"0uK  
选择排序: @!$xSH  
,$]m1|t@z  
package org.rut.util.algorithm.support; #8d#Jw  
S> Fb'rJ3  
import org.rut.util.algorithm.SortUtil; IlEU6Rs  
e ,XT(KY  
/** Q*1Avy6]  
* @author treeroot NiG&Lw*8  
* @since 2006-2-2 pTAm}  
* @version 1.0 ?r;F'%N=  
*/ K*~xy bA  
public class SelectionSort implements SortUtil.Sort { c'$y_]  
8?~>FLWTXZ  
/* a[t"J*0  
* (non-Javadoc) V xN!Ki=  
* DI{Qs[  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #~Kno@  
*/ j\#)'>"  
public void sort(int[] data) { Jn(|.eT|  
int temp; O-AC$C[d  
for (int i = 0; i < data.length; i++) { El}~3|a?  
int lowIndex = i; ]_ LAy  
for (int j = data.length - 1; j > i; j--) { kb-XEJ}L  
if (data[j] < data[lowIndex]) { ;180ct4  
lowIndex = j; 1xxTI{'g[  
} BDN}`F[F  
} p7},ymQ|YQ  
SortUtil.swap(data,i,lowIndex); *h?*RUQ  
} e23&d  
} axG%@5  
NrcV%-+u%  
} B <Jxj  
RCkmxO;b&  
Shell排序: <MxA;A  
}2=~7&)  
package org.rut.util.algorithm.support; c7rC!v  
s]vsD77&  
import org.rut.util.algorithm.SortUtil; &~"N/o  
z'Bvjul  
/** p@$92> '  
* @author treeroot o/U}G,|G  
* @since 2006-2-2 mv<cyWp  
* @version 1.0 ?zo7.R-Vac  
*/ c3fd6Je5  
public class ShellSort implements SortUtil.Sort{ x}C$/7^  
{s@&3i?ZiC  
/* (non-Javadoc)  LWo)x  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .ErR-p=-  
*/ ^b&hy&ag  
public void sort(int[] data) { hzV%QDUpe  
for(int i=data.length/2;i>2;i/=2){  X56.Y.  
for(int j=0;j insertSort(data,j,i); *{fZA;<R  
} ubl Y%{"  
} j%!xb><  
insertSort(data,0,1); IFSIQ q  
} CyS.GdyP  
AfW:'>2  
/** TIV|7nKL  
* @param data N,)rrBD  
* @param j F0xm% ?  
* @param i ZU:c[`  
*/ V" 5rIk  
private void insertSort(int[] data, int start, int inc) { 4YMUkwh  
int temp; R<T5lkJ\/  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); rp-.\Hl/a  
} Ze`ms96j{  
} pfk)_;>,  
} k DKfJp&a  
s 4 Uk5<  
} Si;eBPFH  
Dk~ JH9#  
快速排序: `)jAdad-s  
$nthMx$  
package org.rut.util.algorithm.support; mqQ//$Y   
<XpG5vV  
import org.rut.util.algorithm.SortUtil; o<S(ODOfi  
BBoVn^Z*R  
/** (.M &nN'Ce  
* @author treeroot gA+@p'XnR  
* @since 2006-2-2 Jl) Q #  
* @version 1.0 5X`m.lhUc  
*/ cT JG1'm  
public class QuickSort implements SortUtil.Sort{ ^O5PcV3Eg  
EU7mP MxJ  
/* (non-Javadoc) r-}C !aF]  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) n\scOM)3  
*/ XQ k ,xQ  
public void sort(int[] data) { B?XqH_=0L  
quickSort(data,0,data.length-1); ^@maF<Jb  
} G{s q|1  
private void quickSort(int[] data,int i,int j){ 9H%L;C5<  
int pivotIndex=(i+j)/2; u_)'}  
file://swap 4H%Ai(F}_  
SortUtil.swap(data,pivotIndex,j); |P=-m-W  
{Pi]i?   
int k=partition(data,i-1,j,data[j]); ,3ivB8  
SortUtil.swap(data,k,j); 7OZjLD{ID  
if((k-i)>1) quickSort(data,i,k-1); 9<!Ie^o?  
if((j-k)>1) quickSort(data,k+1,j); [1`&\C_E  
XCZNvLG  
} z!\)sL/"  
/** I_h&35^t  
* @param data #.W<[KZf  
* @param i (^Hpe5h&  
* @param j k'{Bhi4  
* @return ]$WwPDZ  
*/ Oc?]L&ap  
private int partition(int[] data, int l, int r,int pivot) { czp}-{4X  
do{ sZPA(N?  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot);  F| O  
SortUtil.swap(data,l,r); I.}E#f/A'  
} eN ]9=Y~-K  
while(l SortUtil.swap(data,l,r); LZ*ZXFIg  
return l; 64-;| k4F  
} w ]$Hr   
h>'Mh;+  
} >*goDtTjp  
%:] ive]e  
改进后的快速排序: ]EPFyVt~3  
}EWPLJA  
package org.rut.util.algorithm.support; kEM|;&=_  
r5aOQ  
import org.rut.util.algorithm.SortUtil; *U^7MU0  
Wi{ jC?2Q  
/** r(cd?sL96R  
* @author treeroot n[`FoY  
* @since 2006-2-2 <-m[0zg q  
* @version 1.0 .qk_m-o  
*/ qUtlh,4)  
public class ImprovedQuickSort implements SortUtil.Sort { 7^Q4?(A  
p{4nWeH?B  
private static int MAX_STACK_SIZE=4096; p!3!&{  
private static int THRESHOLD=10; dJD8c 2G  
/* (non-Javadoc) 3]g|Cwu  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) loFApBD=$^  
*/ sDnXgCcS!  
public void sort(int[] data) { \$[S=&E  
int[] stack=new int[MAX_STACK_SIZE]; N1i%b,:3  
"_T8Km008  
int top=-1; DF!*S{)  
int pivot; 0_faJjTbP;  
int pivotIndex,l,r; P+nd?:cz  
[oh0 )wzB  
stack[++top]=0; +&h<:/ V  
stack[++top]=data.length-1; vCS D1~V_  
P<A_7Ho  
while(top>0){ hV]]%zwR+  
int j=stack[top--]; -9z!fCu3  
int i=stack[top--]; yJAz#~PO/  
/KH,11 )yc  
pivotIndex=(i+j)/2; gG6j>%y  
pivot=data[pivotIndex]; o\;cXu h  
=;?afUj  
SortUtil.swap(data,pivotIndex,j); [ GqQ6\  
iSg^np  
file://partition KN-)m ta&  
l=i-1; wz=c#}0dB  
r=j; m3i+b  
do{ 7$u}uv`j  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); i917d@r(<  
SortUtil.swap(data,l,r); zBTyRL l  
} I[v6Y^{q  
while(l SortUtil.swap(data,l,r); Ga1(T$ |H  
SortUtil.swap(data,l,j); lo:{T _ay  
iy\ 6e k1  
if((l-i)>THRESHOLD){ qTUyax  
stack[++top]=i; {gwJ>]z"e  
stack[++top]=l-1; Xe7/  
} YA[\|I33  
if((j-l)>THRESHOLD){ 0<C]9[l  
stack[++top]=l+1;  &@h(6  
stack[++top]=j; QlCs ,bT  
} hFp\,QSx  
^>ICycJ  
} AeN$AqQd/  
file://new InsertSort().sort(data); \=NS@_t,  
insertSort(data); {N2MskK  
} 51&K  
/** 78fFAN`  
* @param data lqoJ2JMy  
*/ -- chU5  
private void insertSort(int[] data) { qzt.k^'-^  
int temp; KrDG  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); E +!A0!1  
} A, ;V|jv9  
} M4`. [P4  
} /l&$B  
nA?Ks!9T  
} mW&hUP Rx  
z[~ph/^  
归并排序: @n Oj6b  
vlS+UFH0  
package org.rut.util.algorithm.support; 3BzC'nplm  
g`9`/  
import org.rut.util.algorithm.SortUtil; z+(V2?xcvt  
J70r`   
/** |b'}.(/3i  
* @author treeroot iVe"iH  
* @since 2006-2-2 ?|NMJ Qsa7  
* @version 1.0 'NYW`,  
*/ U1^3 &N8  
public class MergeSort implements SortUtil.Sort{ 9H#;i]t&  
J':x]_;  
/* (non-Javadoc) O-jpS?@  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 3yw`%$d5  
*/ t#BQB<GI  
public void sort(int[] data) { zD,K_HicI  
int[] temp=new int[data.length]; o;5ns  
mergeSort(data,temp,0,data.length-1); ]u<8j r  
} )~[rb<:)b  
V|W[>/  
private void mergeSort(int[] data,int[] temp,int l,int r){ cWS 0B $$  
int mid=(l+r)/2; `+0K~k|DC  
if(l==r) return ; la}Xo0nq0+  
mergeSort(data,temp,l,mid); BDiN*.w5  
mergeSort(data,temp,mid+1,r); DO{Lj# @  
for(int i=l;i<=r;i++){ >Xv Fg  
temp=data; >#Ue`)d`aY  
} u]uZc~T  
int i1=l; 0 F-db  
int i2=mid+1; ;\48Q;  
for(int cur=l;cur<=r;cur++){ o@47WD'm  
if(i1==mid+1) J[7Sf^r  
data[cur]=temp[i2++]; # m;|QWW  
else if(i2>r) |\3X7)^8D  
data[cur]=temp[i1++]; AREpZ2GiU  
else if(temp[i1] data[cur]=temp[i1++]; o<8SiVC2  
else %("WoBPH`  
data[cur]=temp[i2++]; MlH0  
} 6O0CF}B*  
} VteMsL/H  
YM.Q?p4g  
} N,ysv/zq7  
-4!S?rHwd+  
改进后的归并排序: GMW,+  
NPjNkpWm&=  
package org.rut.util.algorithm.support; }$X/HK  
&X&msEM  
import org.rut.util.algorithm.SortUtil; `m+o^!SGe  
P?/Mrz   
/** #L`'<ge'g*  
* @author treeroot P5Is#7udN8  
* @since 2006-2-2 m4~>n(  
* @version 1.0 yp l`vJ]X  
*/ n>k1 D  
public class ImprovedMergeSort implements SortUtil.Sort { -ztgirU  
_Qd C V`  
private static final int THRESHOLD = 10; O~DdMW  
6O\a\z  
/* h"ZR`?h  
* (non-Javadoc) -a\[`JHi  
* !}I+)@~\w  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) >&`;@ZOH  
*/ Tx:S{n7&  
public void sort(int[] data) { ]gjB%R[.m  
int[] temp=new int[data.length]; EAZLo;  
mergeSort(data,temp,0,data.length-1); N4rDe]JnPR  
} ~.&PQE$DF  
JS2h/Y$  
private void mergeSort(int[] data, int[] temp, int l, int r) { Zt/4|&w  
int i, j, k; m4x8W2q  
int mid = (l + r) / 2; 7v]9) W=y  
if (l == r) aaRc?b'/  
return; _MxKfah'  
if ((mid - l) >= THRESHOLD) ?M9?GodbP.  
mergeSort(data, temp, l, mid); JrNqS[c/  
else pKNrEq  
insertSort(data, l, mid - l + 1); :sA$LNj}  
if ((r - mid) > THRESHOLD) CXd/M~:!  
mergeSort(data, temp, mid + 1, r); P={8qln,X  
else vugGMP;D(  
insertSort(data, mid + 1, r - mid); :F`"CR^,  
u`?v-   
for (i = l; i <= mid; i++) { N'n\_x  
temp = data; :878q TB  
} KvY1bMU!  
for (j = 1; j <= r - mid; j++) { *|Bt!  
temp[r - j + 1] = data[j + mid]; J u"K"  
} Z# o;H$  
int a = temp[l]; xua E\*m  
int b = temp[r]; d:3OC&  
for (i = l, j = r, k = l; k <= r; k++) { t .-%@,s  
if (a < b) { R q9(<' F  
data[k] = temp[i++]; ,-`A6ehg  
a = temp; ^^(!>n6r^  
} else { yt[*4gF4  
data[k] = temp[j--]; Xv2Q8-}w  
b = temp[j]; ;i-<dAV8B  
} ^u-;VoK  
} 0x,NMS  
} pKkBA r,  
HApjXv!U[  
/** 5ggsOqH  
* @param data  LOi/+;>  
* @param l JIU8~D  
* @param i ZVni'y m  
*/ ?5j}&Y3  
private void insertSort(int[] data, int start, int len) { ]=vRjw  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); =58:e7(df  
} 6rBP,\m  
} 1<F6{?,z  
} ypLt6(1j%  
} ZW%;"5uVm)  
|"aop|  
堆排序: Ef\&3TcQ  
"@(Sw>*o  
package org.rut.util.algorithm.support; \\Te\l|L  
YckLz01jh  
import org.rut.util.algorithm.SortUtil; )R6-]TkA_  
$0&<Jx  
/** xz3|m _)  
* @author treeroot a_(T9pr  
* @since 2006-2-2 iyTKy+3A  
* @version 1.0 'cPE7uNT  
*/ @M!nAQ8hY  
public class HeapSort implements SortUtil.Sort{ @&f~#Xe  
E-v^eMWX  
/* (non-Javadoc) IN?6~O p  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |Ng}ZLBM  
*/ RC~C}  
public void sort(int[] data) { E~ +g6YlT  
MaxHeap h=new MaxHeap(); ub9,Wd"^  
h.init(data); EI8KKo *  
for(int i=0;i h.remove(); :=?od 0]W  
System.arraycopy(h.queue,1,data,0,data.length); 9s&dN  
} MeDlsO  
N?v}\P U  
private static class MaxHeap{ Mn TqWC90  
!0X/^Xv@=  
void init(int[] data){ #b>D^=NV>)  
this.queue=new int[data.length+1]; p-kug]qX  
for(int i=0;i queue[++size]=data; D]?yGI_  
fixUp(size); F*p@hl  
} mWTV)z57  
} dmPAPCm%y  
1otE:bi  
private int size=0; UId?a} J  
 ?)2;W  
private int[] queue; $Gs|Z$(  
cv"Bhql  
public int get() { JQDS3v=1$  
return queue[1]; go?}M]c%7  
} NeR1}W  
N) '|l0x0  
public void remove() { J[al4e^  
SortUtil.swap(queue,1,size--); #L+ZHs~  
fixDown(1); "{x+ \Z\  
} 6vf<lmN  
file://fixdown P~h 0Ul  
private void fixDown(int k) { mbXW$E-&R2  
int j; [ z,6K=  
while ((j = k << 1) <= size) { .TO#\!KBv  
if (j < size %26amp;%26amp; queue[j] j++; ( "wmc"qH  
if (queue[k]>queue[j]) file://不用交换 d@ef+-  
break; q"VC#9 7`  
SortUtil.swap(queue,j,k); jqQGn"!  
k = j; m[<z/D  
} O|0V mm  
} 6+/BYN!&4  
private void fixUp(int k) { 4VP$, |a  
while (k > 1) { .5!Q(  
int j = k >> 1; FW:V<{f  
if (queue[j]>queue[k]) ."j=s#OC(  
break; ]SUW"5L-  
SortUtil.swap(queue,j,k); tZygTvK/S  
k = j; ^K0oJg.E  
} OjsMT]  
} y*T@_on5  
8qwPk4  
} nZ4@g@e2  
O'S9y  
} LF ;gdF%@  
Nt~G  {m  
SortUtil: >6:UWvV1  
;R7+6  
package org.rut.util.algorithm; UcWf O!}D  
^&\<[\  
import org.rut.util.algorithm.support.BubbleSort; m%U$37A 1  
import org.rut.util.algorithm.support.HeapSort;  / !aVv  
import org.rut.util.algorithm.support.ImprovedMergeSort; GpXU&A'r  
import org.rut.util.algorithm.support.ImprovedQuickSort; zU";\);  
import org.rut.util.algorithm.support.InsertSort; :nS p  
import org.rut.util.algorithm.support.MergeSort; ~j[mME}  
import org.rut.util.algorithm.support.QuickSort; /! M%9gu  
import org.rut.util.algorithm.support.SelectionSort; ] uXmug  
import org.rut.util.algorithm.support.ShellSort; @5{h+^  
D 4<,YBvV  
/** 9s#*~[E*  
* @author treeroot 3w8v.J8q  
* @since 2006-2-2 6\RZ[gA?  
* @version 1.0 w_*$w Vl  
*/ &{S@v9~IT  
public class SortUtil { b q8nV  
public final static int INSERT = 1; EO\- J-nM  
public final static int BUBBLE = 2; & sgzSX  
public final static int SELECTION = 3; QJ,~K&?  
public final static int SHELL = 4; U]"6KS   
public final static int QUICK = 5; RY]jY | E  
public final static int IMPROVED_QUICK = 6; q U^`fIa  
public final static int MERGE = 7; ' pfkbmJ  
public final static int IMPROVED_MERGE = 8; },,K6*P  
public final static int HEAP = 9; @Uqcym.  
7W=s.Gy7G\  
public static void sort(int[] data) { .e|\Bf0P  
sort(data, IMPROVED_QUICK); UQq Qim  
} 6OZ n7:)Y  
private static String[] name={ S+u@ Q}  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ?:Rw[T@ l  
}; %Vhj<gN  
Thuwme  
private static Sort[] impl=new Sort[]{ 9G)fJr  
new InsertSort(), xpWY4Q  
new BubbleSort(), &G_XgQsg{  
new SelectionSort(), e|4U2\&3y  
new ShellSort(), G!U `8R  
new QuickSort(), M<xF4L3]  
new ImprovedQuickSort(), L DdgI  
new MergeSort(), ?zK\!r{  
new ImprovedMergeSort(), Z@bKYfGM  
new HeapSort() `86})xz{  
}; wj\kx\+  
\;0UP+  
public static String toString(int algorithm){ }T"&4Rvs2R  
return name[algorithm-1]; v\-7sgZR  
} 35Fs/Gf-n  
>+Y@rj2  
public static void sort(int[] data, int algorithm) { RC^k#+  
impl[algorithm-1].sort(data); yK w.69.  
} vgN%vw pL  
\1oN't.  
public static interface Sort { O[ug7\cl+  
public void sort(int[] data); mBDzc(_\$'  
} s$xm  
&'c&B0j  
public static void swap(int[] data, int i, int j) { oA4<AJ2  
int temp = data; 1(qL),F;  
data = data[j]; ap[Q'=A`  
data[j] = temp; >Dq&[9,8  
} ~X,ZZ 9H  
} Ki\J)l  
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