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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。 ir|c<~_=  
插入排序: N@0cn q:"  
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package org.rut.util.algorithm.support; 2F :8=_sA  
`vZX"+BAh  
import org.rut.util.algorithm.SortUtil; l"-Z#[  
/** C),i#v  
* @author treeroot s  }Ql9  
* @since 2006-2-2 LU/;` In  
* @version 1.0 ]f_`w81[  
*/ wJj:hA}  
public class InsertSort implements SortUtil.Sort{ _&%FGcAS  
)2a)$qx;  
/* (non-Javadoc) ALj~e#{;z  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) m!5Edo-;<  
*/ _n1[(I  
public void sort(int[] data) { 5;+KMM:zb  
int temp; $,P:B%]  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); 1yVhO2`7]  
} )k;;O7C k  
} ,l Y4WO  
} $<yhEvv  
/,`OF/%  
} 7[PEiAI  
|]?zH~L  
冒泡排序: Ss%1{s~ok  
mRa\ wEg%  
package org.rut.util.algorithm.support; 2vWn(6`  
.G#li(NWH  
import org.rut.util.algorithm.SortUtil; W.NZ%~|+e/  
`BVmuUMm  
/** )U=]HpuzI  
* @author treeroot J ZkQ/vp(  
* @since 2006-2-2 Nte$cTjX  
* @version 1.0 }B a_epM  
*/ z_N";Rn  
public class BubbleSort implements SortUtil.Sort{ 8CZ%-}-%$  
+:"0 %(  
/* (non-Javadoc) T;?k]4.X  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 7f4O~4.[i  
*/ 5dB62dqN  
public void sort(int[] data) { 1[T7;i$  
int temp; 3H`{ A/r  
for(int i=0;i for(int j=data.length-1;j>i;j--){ Fj(GyPFG  
if(data[j] SortUtil.swap(data,j,j-1); 1Dl6T\20  
} l<BV{Gl  
} 6y~F'/ww  
} z}B 39L  
} N@L{9ak1  
?:ZB'G{%E  
} &iVdqr1,  
,T`,OZm  
选择排序: #K6cBfqI  
# )y/aA  
package org.rut.util.algorithm.support; Q{RmE:  
q;")  
import org.rut.util.algorithm.SortUtil; q+y\pdhdO  
i5t6$|u:&m  
/** ~y2zl  
* @author treeroot EgU#r@7I  
* @since 2006-2-2 s0^(yEcq  
* @version 1.0 \1Xk[%  
*/ 2h'Wu qO  
public class SelectionSort implements SortUtil.Sort { m^G(qoZ]  
lU%}_!tp3/  
/* 'Vo8|?.WhX  
* (non-Javadoc) ^w.hI5ua)  
* *B"Y]6$  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8&)v%TX  
*/ P}Kgh7)3  
public void sort(int[] data) { %)x9u$4W2  
int temp; *q*3SP/  
for (int i = 0; i < data.length; i++) { :Iv;%a0 -  
int lowIndex = i; :q]9F4im  
for (int j = data.length - 1; j > i; j--) { hd(FOKOP  
if (data[j] < data[lowIndex]) { RhH 1nf2UR  
lowIndex = j; K"H\gmV_ g  
} {O^u^a\m  
} &(rWl`eTY`  
SortUtil.swap(data,i,lowIndex); e~9O#rQI  
} _XV%}Xb'  
} :x)H!z P  
jC9us>b  
} iqQT ^  
DPTk5o[  
Shell排序: 8Ojqm#/f  
P5h|* ?=  
package org.rut.util.algorithm.support; :oP LluW*  
hM Dd*<%l  
import org.rut.util.algorithm.SortUtil;  uZS:  
G@[8P?M=Z  
/** i2~uhGJ  
* @author treeroot qd*}d)!  
* @since 2006-2-2 ~#A}=, 4>  
* @version 1.0 d(T4Kd$r  
*/ ,^UqE {  
public class ShellSort implements SortUtil.Sort{ |h>PUt@LL  
B`~EA] d  
/* (non-Javadoc) I&;>(@K  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Ts5)r(  
*/ Dcl$?  
public void sort(int[] data) { )'_[R@ThB  
for(int i=data.length/2;i>2;i/=2){ eqo0{e  
for(int j=0;j insertSort(data,j,i); Z!1D4`w  
} MtLWpi u@[  
} J D\tt-  
insertSort(data,0,1); zfIo] M`  
} /`*{57/3  
-@W9+Zf5  
/** Ot t6y  
* @param data 9u B?-.  
* @param j _pvB$&  
* @param i Mt[yY|Ec|  
*/ `fu_){  
private void insertSort(int[] data, int start, int inc) { X z+%Ym  
int temp; RLmOg{L  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); _gvFs %J  
} Jh26!%<Bl  
} IC`3%^  
} YG "Ta|@5  
2"Os9 KD  
} f-ltV<C_  
b$G{^  
快速排序: O\5%IfB'"  
bjZJP\6  
package org.rut.util.algorithm.support; ~wvt:E,f C  
1|bXIY.J*  
import org.rut.util.algorithm.SortUtil; zA,vp^  
7FB?t<x  
/** I= mz^c{  
* @author treeroot R=D]:u<P  
* @since 2006-2-2 mxa~JAlN_  
* @version 1.0 YB#fAU  
*/ C"hN2Z!CD|  
public class QuickSort implements SortUtil.Sort{ j{@O %fv=  
6EqA Y`y  
/* (non-Javadoc) !ifU}qFzK  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) t*{L[c9.Uq  
*/ ke4E 1T-1n  
public void sort(int[] data) { %b6$N_M{H1  
quickSort(data,0,data.length-1); -;""l{  
} E C?}iP  
private void quickSort(int[] data,int i,int j){ q t"D!S_  
int pivotIndex=(i+j)/2; -t`kb*O3`  
file://swap E)"19l|}B  
SortUtil.swap(data,pivotIndex,j); Ox3=1M0  
<Xf6?nyZ(  
int k=partition(data,i-1,j,data[j]); }LHYcNw^z  
SortUtil.swap(data,k,j); uYJS=NGNA  
if((k-i)>1) quickSort(data,i,k-1); cc@W 6W  
if((j-k)>1) quickSort(data,k+1,j); LUOjaX  
*t@A-Sn  
} j3j?2#vR  
/** !Sc"V.o @!  
* @param data ?OD$`{1  
* @param i { 3G  
* @param j hFtV\xF K  
* @return GkGiQf4hh  
*/ HJL! ;i  
private int partition(int[] data, int l, int r,int pivot) { L2}\Ah"[  
do{ 7]=&Q4e4  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); E^F"$Z" N  
SortUtil.swap(data,l,r); z0"t]4s  
} 6'qkD<  
while(l SortUtil.swap(data,l,r); Sj+H{xJi  
return l; |OeyPD#  
} %(CC  
ZmA}i`  
} Tz @<hE  
m`yvZ4K!  
改进后的快速排序: i7x&[b  
\)PB p  
package org.rut.util.algorithm.support; c%&,(NJ]K  
]'.qRTz'\t  
import org.rut.util.algorithm.SortUtil; Y teIp'T  
ddn IKkOp  
/** uGU 2  
* @author treeroot Wu>]R'C  
* @since 2006-2-2 _@5Xmr  
* @version 1.0 7e_4sxg'(3  
*/ B=SA +{o  
public class ImprovedQuickSort implements SortUtil.Sort { r~b.tpH  
xUJ(tG3  
private static int MAX_STACK_SIZE=4096; u[a-9^&g  
private static int THRESHOLD=10; B'Yx/c&n  
/* (non-Javadoc) 92TuuN#{  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) pb!2G/,.[  
*/ Fh~9(Y#  
public void sort(int[] data) { di\.*7l?  
int[] stack=new int[MAX_STACK_SIZE]; Bm~^d7;Cw  
&3vm @  
int top=-1; y?s z&*:  
int pivot; YwVA].p@TI  
int pivotIndex,l,r; Y3~Uz#`SU  
pY&6p~\p  
stack[++top]=0; Yy~x`P'g!  
stack[++top]=data.length-1; ~WrpJjI[  
oodA&0{)d  
while(top>0){ ko%mZ0Y  
int j=stack[top--]; Z$z-Hx@%  
int i=stack[top--]; b9g2mWL\T  
#  X (2  
pivotIndex=(i+j)/2; Fe8X@63  
pivot=data[pivotIndex]; 4LSs WO<@  
M$x,B#b  
SortUtil.swap(data,pivotIndex,j); #}Qe{4L  
8\J$\Edv  
file://partition T{prCM  
l=i-1; *`a$6F7m4  
r=j; r^k+D<k[7  
do{ CvIuH=,  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); "P7OD^(x/  
SortUtil.swap(data,l,r); O>E}Lu;|  
} QL0q/S1*  
while(l SortUtil.swap(data,l,r); 6;E3|st1X  
SortUtil.swap(data,l,j); m2SJ\1 J=  
"8Dm7)nB  
if((l-i)>THRESHOLD){ `.@udfog^0  
stack[++top]=i; le:}M M  
stack[++top]=l-1; :E W1I>}_  
} Q g/Rw4[  
if((j-l)>THRESHOLD){ W@!qp  
stack[++top]=l+1; gX"  
stack[++top]=j; &D<6Go/)_*  
} SX,$ $43  
'c~SE>  
} 2K4Xu9-i:b  
file://new InsertSort().sort(data); =2q#- ,t  
insertSort(data); & n*ga$Q  
} <ppdy,j:  
/** E"}%$=yK  
* @param data WOPIF~1v  
*/ Q 1i5"'][  
private void insertSort(int[] data) { 7<LuL  
int temp; gpq ,rOIK  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); "= 2\kZ  
} LYAGpcG  
} (YJ2- X~  
} Dx\~#$S!=  
oW OR7)?r  
} yR5XcPoKI  
e@c8Ce|0  
归并排序: 42e[OG-  
wmpQF<  
package org.rut.util.algorithm.support; )P? 0YC  
#@nPB.  
import org.rut.util.algorithm.SortUtil; }S"gZ6   
pZ $>Hh#  
/** -qpvVLR,  
* @author treeroot |Ja5O  
* @since 2006-2-2  Ju5Dd\  
* @version 1.0 xJ#O|7N  
*/ J+CGhk  
public class MergeSort implements SortUtil.Sort{ 9t`yv@.>N  
ql%K+4@  
/* (non-Javadoc) o>*`wv  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Sj)?!  
*/ ?i_2ueVR  
public void sort(int[] data) { bv41et+Kb  
int[] temp=new int[data.length]; /?BTET  
mergeSort(data,temp,0,data.length-1); nls$ wE  
} AW;xlY= g  
}2Ge??!  
private void mergeSort(int[] data,int[] temp,int l,int r){ :bo2H[U+  
int mid=(l+r)/2; ZT"vVX- )G  
if(l==r) return ; dm[JDVv|  
mergeSort(data,temp,l,mid); C-_u`|jQ  
mergeSort(data,temp,mid+1,r); [6\O <-?  
for(int i=l;i<=r;i++){ Rxw+`ru  
temp=data;  "X=^MGV  
} p%Q{Rqc)  
int i1=l; 1z; !)pG.  
int i2=mid+1; 5T"h7^}e  
for(int cur=l;cur<=r;cur++){ }.u[';q ]S  
if(i1==mid+1) c.Izm+9k  
data[cur]=temp[i2++]; I+Y Z+  
else if(i2>r) N f?\O@  
data[cur]=temp[i1++]; <`q-#-V@  
else if(temp[i1] data[cur]=temp[i1++]; }<z [t5  
else Z3<lJk\Y  
data[cur]=temp[i2++]; !#1UTa  
} MB5V$toC  
} <}mA>c'k  
fyZtwl@6w#  
} sj+ )   
@CPkP  
改进后的归并排序: $/u.F;  
XThU+s9  
package org.rut.util.algorithm.support; F&k<P>k  
17:7w  
import org.rut.util.algorithm.SortUtil; >0:=<RW  
5a5JOl$8  
/** pNHL&H\  
* @author treeroot u#ocx[  
* @since 2006-2-2 wlwgYAD  
* @version 1.0 -hK^*vJ  
*/ hZ>1n&[ @  
public class ImprovedMergeSort implements SortUtil.Sort { '\pSUp  
? _[ q{i{  
private static final int THRESHOLD = 10; _Fkb$NJ"]Q  
@q|c|X:I  
/* ^MWp{E  
* (non-Javadoc) HT_nxe`E  
* 7*+tG7I @  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5M%)*.Y 3[  
*/ -t*P=V|@  
public void sort(int[] data) { $-]9/Ct  
int[] temp=new int[data.length]; 2 I.Q-'@  
mergeSort(data,temp,0,data.length-1); 0sq?>$~Kc*  
} V' sq'XB  
PTF|"^k+   
private void mergeSort(int[] data, int[] temp, int l, int r) { @Y%i`}T%(  
int i, j, k; >b*}Td~J  
int mid = (l + r) / 2; UE/iq\a>  
if (l == r) 7Zh#7jiZ`  
return; @ +>>TGC  
if ((mid - l) >= THRESHOLD) tv9 R$-cJ  
mergeSort(data, temp, l, mid); 7':qx}c#!1  
else 8$V:+u  
insertSort(data, l, mid - l + 1); db0]D\  
if ((r - mid) > THRESHOLD) OVa38Aucr3  
mergeSort(data, temp, mid + 1, r); !OL[1_-4|K  
else RG V}c#  
insertSort(data, mid + 1, r - mid); Hw 1cc3!  
CKr5L  
for (i = l; i <= mid; i++) { F<LRo}j"9Q  
temp = data; ;{f4E)t 7  
} _ 2E*  
for (j = 1; j <= r - mid; j++) { 4g^Xe-  
temp[r - j + 1] = data[j + mid]; 8a,pDE  
} n|AV7c  
int a = temp[l]; ;kb);iT  
int b = temp[r]; 5tQZf'pHfd  
for (i = l, j = r, k = l; k <= r; k++) { {'$+?V"&  
if (a < b) { 0:`*xix  
data[k] = temp[i++]; G*_qqb{B  
a = temp; &0i$Y\g  
} else { 0O[le*3b  
data[k] = temp[j--]; #p ;O3E@  
b = temp[j]; ST2:&xH(  
} (&Rql7](8  
} ] n\]ao  
} J-Tiwl  
ON){d!]uJ  
/** fO&`A:JY  
* @param data [#q]B=JB  
* @param l (Jw_2pHxr"  
* @param i kI)}7e  
*/ &v0-$  
private void insertSort(int[] data, int start, int len) { w\YS5!P,V  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); sqtz^K ROM  
} T7 ,]^ 1  
} ttsR`R1.k  
} 6!m#;8 4  
} 5~[7|Y  
hu}$\  
堆排序: el9P@r0  
=0g!Q   
package org.rut.util.algorithm.support; MYS`@%ZV#k  
}HoCfiE=X  
import org.rut.util.algorithm.SortUtil; M}\h?s   
]/=RABi  
/** V+E8{|dYL  
* @author treeroot Ou_H&R  
* @since 2006-2-2 {cXr!N^K  
* @version 1.0 z{rV|vQ  
*/ BPO5=]W 7  
public class HeapSort implements SortUtil.Sort{ BiYxI{VFD  
Z}+}X|  
/* (non-Javadoc) qIi \[Ugh  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 3a?-UT!  
*/ }4|EHhG  
public void sort(int[] data) { ^K?-+  
MaxHeap h=new MaxHeap(); MGR:IOTa  
h.init(data); kUd]8Ff!  
for(int i=0;i h.remove(); h9)S&Sk{s  
System.arraycopy(h.queue,1,data,0,data.length); ` 2W^Ui,4  
} U,=f};  
W+ S~__K  
private static class MaxHeap{ eYUb>M)  
U~x]2{}  
void init(int[] data){  <mn[-  
this.queue=new int[data.length+1]; lz,M$HG<[  
for(int i=0;i queue[++size]=data; <V&0GAZ  
fixUp(size); N:lfKI  
} h:aa^a~y i  
} E4 X6f  
uM2@&)u  
private int size=0; N'`X:7fN  
?:"ABkL|+Y  
private int[] queue; W"NI^OX  
[^qT?se{  
public int get() { &,&+p0CSI!  
return queue[1]; N"70P/  
} [}L~zn6>?a  
c{M ,K  
public void remove() { gb_Y]U  
SortUtil.swap(queue,1,size--);  &K/?#  
fixDown(1); J,Sa7jv[  
} z< %P"   
file://fixdown 2R/|/>T v  
private void fixDown(int k) { :K| H/kht  
int j; _uIS[%4g  
while ((j = k << 1) <= size) { ;R?@ D]  
if (j < size %26amp;%26amp; queue[j] j++; vIV|y>;g  
if (queue[k]>queue[j]) file://不用交换 cN,*QN  
break; `!]|lI!GW  
SortUtil.swap(queue,j,k); &;@L] o  
k = j; {-Y;!  
} PT/Nz+  
} $+4DpqJ  
private void fixUp(int k) { kdNo<x1o  
while (k > 1) { <`nShP>vl  
int j = k >> 1; N5?bflY  
if (queue[j]>queue[k]) Gx C+lqH#  
break; xM jn=\}  
SortUtil.swap(queue,j,k); ]C \+b <  
k = j;  3 xyrWl  
} dtTn]}J  
} R"t#dG]1t  
8V:;HY#  
} 6W i n!4  
xi (@\A  
} \J^#2{d  
D3Q+K  
SortUtil: io#}z4"'qY  
gFaZ ._  
package org.rut.util.algorithm; tq L(H25z  
x3O%W?5  
import org.rut.util.algorithm.support.BubbleSort; 3ahriZe  
import org.rut.util.algorithm.support.HeapSort; @O#!W]6NT6  
import org.rut.util.algorithm.support.ImprovedMergeSort; )@wC6Ij  
import org.rut.util.algorithm.support.ImprovedQuickSort; Xh"9Bcjf  
import org.rut.util.algorithm.support.InsertSort; *)K 5<}V  
import org.rut.util.algorithm.support.MergeSort; `D+zX  
import org.rut.util.algorithm.support.QuickSort; tT]@yo|?e/  
import org.rut.util.algorithm.support.SelectionSort; !JCs'?A  
import org.rut.util.algorithm.support.ShellSort; V(S7mA:T  
aT0~C.vT  
/** k(ouE|B  
* @author treeroot J9T2 p\5  
* @since 2006-2-2 fK/:  
* @version 1.0 h#0n2o#  
*/ i%i~qTN  
public class SortUtil { yY$^ R|t  
public final static int INSERT = 1; Y:\msq1xp  
public final static int BUBBLE = 2; 3bRxV @0.  
public final static int SELECTION = 3; s$fM,l:!  
public final static int SHELL = 4; +g1>h ,K 3  
public final static int QUICK = 5; TEV DES  
public final static int IMPROVED_QUICK = 6; vj?{={Y  
public final static int MERGE = 7; kQ+y9@=/g  
public final static int IMPROVED_MERGE = 8; J^+w]2`S  
public final static int HEAP = 9; Z %pc"  
?b_E\8'q]  
public static void sort(int[] data) { WuK<?1meN  
sort(data, IMPROVED_QUICK); 4?pb!@l  
} t'_EcYNS  
private static String[] name={  2s}S9  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" dS1HA>c)O  
}; UBd+,]"f  
S*l/ Sa@  
private static Sort[] impl=new Sort[]{ h8V*$  
new InsertSort(), ;+75"=[YT  
new BubbleSort(), tw4,gW  
new SelectionSort(), l,|Llb  
new ShellSort(),  +P(*S  
new QuickSort(), #Y= A#Yz,{  
new ImprovedQuickSort(), A"*=K;u/|m  
new MergeSort(), 8u*<GbKGI  
new ImprovedMergeSort(), H&s`Xr  
new HeapSort() ykQb;ZP8jh  
}; a 4?A 5  
qT?{}I  
public static String toString(int algorithm){ !Yc:yF  
return name[algorithm-1]; 99OZK  
} xOkduk]  
5 3pW:`  
public static void sort(int[] data, int algorithm) { E$%v);u  
impl[algorithm-1].sort(data); t'K+)OK  
} 3nA^s"#p  
59nRk}^$se  
public static interface Sort { DT-.Gdb8  
public void sort(int[] data); |?KYY0  
} 8cO?VH,nk  
YI0l&'7  
public static void swap(int[] data, int i, int j) { @>2]zMFf  
int temp = data; "e-z 2G@z  
data = data[j]; ztU"CRa8  
data[j] = temp; cK|Uwzif d  
} B2r[oT R  
} 3nBZ+n4z  
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