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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。 7{n\y l?  
插入排序: zzX<?6MS  
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package org.rut.util.algorithm.support; W`#gpi)7N  
xME(B@j  
import org.rut.util.algorithm.SortUtil; mR"uhm}q  
/** {bN Y  
* @author treeroot 6 -]>]Hr-  
* @since 2006-2-2 za,6 du6  
* @version 1.0 fC_zX}3  
*/ #hIEEkCp +  
public class InsertSort implements SortUtil.Sort{ 5pO]vBT  
hzaU8kb  
/* (non-Javadoc) cX2$kIs;  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) GGCqtA^@7d  
*/ Js/N()X  
public void sort(int[] data) { 6hZ.{8e0  
int temp; YVoao#!  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); [ L  
} p` $fTgm  
} Jf2e<?`  
} mv{<'  
s~L`53A  
} $( S*GF$S  
.+OB!'dDK^  
冒泡排序: c8T/4hU MN  
Tru c[A.2Z  
package org.rut.util.algorithm.support; Zw+=ng.q?  
8pqs?L@W  
import org.rut.util.algorithm.SortUtil; ze&#i6S  
ri:,q/-  
/** '}_=kp'X  
* @author treeroot )&>L !,z  
* @since 2006-2-2  q$F)!&  
* @version 1.0 (}G!np  
*/ Ddb-@YD&+0  
public class BubbleSort implements SortUtil.Sort{ ?fV?|ZGZI  
{o( * f  
/* (non-Javadoc) G(3;;F7"  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )`^ /(YG  
*/ byafb+x  
public void sort(int[] data) { kL|\wci  
int temp; rR\;G2p)  
for(int i=0;i for(int j=data.length-1;j>i;j--){ Hj2<ZL  
if(data[j] SortUtil.swap(data,j,j-1); Hoj8okP  
} xWDR72 6  
} sJOV2#r  
} B;V5x/  
} ~Po<(A}`f  
4h;4!I|  
} n,CD  
DY8(g=TI|1  
选择排序: Yr=8!iR$  
sds}bo  
package org.rut.util.algorithm.support;  s'TY[  
7#ofNH J  
import org.rut.util.algorithm.SortUtil; ZNi +Aw$u  
+>!V ]S  
/** S nW7x  
* @author treeroot :<H8'4>  
* @since 2006-2-2 Hte[TRbM  
* @version 1.0 z?4=h Sy  
*/ 4Ac}(N5D@  
public class SelectionSort implements SortUtil.Sort { )9B:Y;>)  
FNC[59   
/* 1eHe~p ,  
* (non-Javadoc) i3P9sdTD  
* 6|5H=*)DH  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) `^x9(i/NE  
*/ H'Nq#K  
public void sort(int[] data) { -G-3q6A  
int temp; tF^g<)S;t  
for (int i = 0; i < data.length; i++) { eQ;Q4  
int lowIndex = i; gX^ PSsp  
for (int j = data.length - 1; j > i; j--) { %&h c"7/k  
if (data[j] < data[lowIndex]) { ywO mQcZ  
lowIndex = j; Z5$fE7ba+  
} _%B/!)v  
} A @2Bs 5F  
SortUtil.swap(data,i,lowIndex); e\D| o?v  
} U7h(-dV   
} a~opE!|m  
w^Ag]HZN  
} 6Hk="$6K  
~>g+2]Bn>$  
Shell排序: -9d%+O~v6~  
f}iU& 3S  
package org.rut.util.algorithm.support; dw9T f^V  
+P)ys#=  
import org.rut.util.algorithm.SortUtil; {~'H  
&iBNO,v  
/** !zR)D|w&  
* @author treeroot w#9_eq|3  
* @since 2006-2-2 n'M>xq_  
* @version 1.0 w"~<h;  
*/ \J3/keL  
public class ShellSort implements SortUtil.Sort{ u%B&WwHG  
;|HL+je;Z  
/* (non-Javadoc) Z7z]2v3}c  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8I.VJ3Q  
*/ ,F9nDF@)  
public void sort(int[] data) { wXbsS)#/  
for(int i=data.length/2;i>2;i/=2){ ugLlI2 nJ  
for(int j=0;j insertSort(data,j,i);  Gq1)1  
} r[pF^y0   
} Da_()e[9p  
insertSort(data,0,1); 9->q|E4  
} y`S o&:1  
m*Cu-6&qd  
/** o2naVxetE  
* @param data Skxd<gv  
* @param j $(rc/h0/E  
* @param i 2+Yb 7 uI,  
*/ e<"/'Ql!k  
private void insertSort(int[] data, int start, int inc) { )%F5t&lum  
int temp; 2w?hgNz  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); vy9dAl  
} ]iVLHVqz  
} Ilq=wPD}j  
} cG_Vc[  
vFhz!P~  
} e.8$ga{  
7u|B ](FS  
快速排序: wk @,wOt  
[_.n$p-  
package org.rut.util.algorithm.support; 24B<[lSK  
D(\$i.,b2  
import org.rut.util.algorithm.SortUtil; WU)Ss`s \  
xaW{I7FfG  
/** i=rH7k  
* @author treeroot .<YcSG  
* @since 2006-2-2 8@eOTzm  
* @version 1.0 v"!4JZ%K  
*/ *eb-rhCVn  
public class QuickSort implements SortUtil.Sort{ >cgpajx*  
tJU-<{8  
/* (non-Javadoc) .zkP~xQ~  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Md&WJ };L  
*/ eB]R3j{  
public void sort(int[] data) {  rLv;Y  
quickSort(data,0,data.length-1); Ia4)uV8  
} #fDs[  
private void quickSort(int[] data,int i,int j){ *C2R`gpBI  
int pivotIndex=(i+j)/2; /X#z*GX  
file://swap \TbVS8e^  
SortUtil.swap(data,pivotIndex,j); )(TAT<  
G;1?<3   
int k=partition(data,i-1,j,data[j]); S v`qB'e2  
SortUtil.swap(data,k,j); <Ef[c@3  
if((k-i)>1) quickSort(data,i,k-1); +B"0{>n}F  
if((j-k)>1) quickSort(data,k+1,j); @~:8ye  
C5 X(U :  
} Or+p%K}-7  
/** s\3q!A?S3  
* @param data &JhX +'U  
* @param i -t-tn22  
* @param j [*4fwk^  
* @return =.Tv)/ea  
*/ lFq{O;q7}  
private int partition(int[] data, int l, int r,int pivot) { +!yX T C  
do{ bw S*]!*  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); Nneo{j  
SortUtil.swap(data,l,r); ;rHO&(h-  
} /'wF2UR  
while(l SortUtil.swap(data,l,r); :dnJY%/q  
return l; bF-"tm  
} VaLs`q&3>  
E6A /SVp  
} -x*2t;%z{U  
B\CN<<N>dD  
改进后的快速排序: ,o#kRWRG  
HdX2YPYn;  
package org.rut.util.algorithm.support; 8%:]W^  
))T>jh   
import org.rut.util.algorithm.SortUtil; A :e;k{J  
h~} .G{"  
/** p]T"|!d  
* @author treeroot jvwwJ<K  
* @since 2006-2-2 D E/:['  
* @version 1.0 E"PcrWB&  
*/ Xm!-~n@-m7  
public class ImprovedQuickSort implements SortUtil.Sort { nJFg^s 1  
B[o`k]]  
private static int MAX_STACK_SIZE=4096; kOrl\_!z3  
private static int THRESHOLD=10; !0}\&<8/m  
/* (non-Javadoc) WO*9+\[v  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) B80aw>M  
*/ e %O0hE  
public void sort(int[] data) { k$i'v:c|:i  
int[] stack=new int[MAX_STACK_SIZE]; =o7}]k7  
4P8*k[.  
int top=-1; Jjm|9|C,  
int pivot; l*=aMjd?  
int pivotIndex,l,r; EqB)sK/3  
N{Qxq>6 G  
stack[++top]=0; ,xsH|xW  
stack[++top]=data.length-1; ip:LcGt  
;;U :Jtn2  
while(top>0){ 9Kv|>#zff  
int j=stack[top--]; b[ w;i]2  
int i=stack[top--]; !CY&{LEYn0  
q_fam,9  
pivotIndex=(i+j)/2; }JgYCsF/f  
pivot=data[pivotIndex]; 8y2+&#$  
dK9Zg,DZL  
SortUtil.swap(data,pivotIndex,j);  kLP0{A  
UQ?%|y*Kc  
file://partition Xrqx\X  
l=i-1; A[N{  
r=j; 0 p uY"[c  
do{ HIvZQQW|  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); j}JZ  
SortUtil.swap(data,l,r); q6d~V] 4:  
} ,FSrn~-j9  
while(l SortUtil.swap(data,l,r); ^+|De}`u  
SortUtil.swap(data,l,j); | A)\ :  
b^CNVdo'  
if((l-i)>THRESHOLD){ L"(4R^]  
stack[++top]=i;  H`QQG!  
stack[++top]=l-1; D-p.kA3MJ  
} 5Rv+zQ#GR  
if((j-l)>THRESHOLD){ N"7]R[*  
stack[++top]=l+1; t0E51Ic@  
stack[++top]=j; 0\QR!*'$  
} nms8@[4-  
QG gF|c7  
} EG<s_d?  
file://new InsertSort().sort(data); 8At<Wic  
insertSort(data); ['qnn|  
}  :$r ^_  
/** YA]5~ ZE\  
* @param data KLWDo%%u  
*/ 0Q9T3X  
private void insertSort(int[] data) { )xU-;z0"~  
int temp; 6;b9swmh  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); XP?rOOn  
} ssQ BSbx  
} 2\<.0  
} p s|)cW3`  
kGYTl,A{  
} ro~+j}*   
.?W5{U  
归并排序: @z`@f"l  
JK_OZ  
package org.rut.util.algorithm.support; ))h6~1`  
dFXc/VH')  
import org.rut.util.algorithm.SortUtil; W7No ls{  
ki]ti={12  
/** N_C;&hJN$w  
* @author treeroot 9)dfL?x8V{  
* @since 2006-2-2 $% k1fa C  
* @version 1.0 $4=f+ "z  
*/ AONDx3[   
public class MergeSort implements SortUtil.Sort{ 2'0K WYM  
uKr1Z2  
/* (non-Javadoc) SI:ifR&T  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2][DZl  
*/ 4Ft1@  
public void sort(int[] data) {  Ukz;0q  
int[] temp=new int[data.length]; V4w=/e _  
mergeSort(data,temp,0,data.length-1); Rd*[%)  
} oA-:zz> wL  
~p1EF;4#  
private void mergeSort(int[] data,int[] temp,int l,int r){ u,. 3  
int mid=(l+r)/2; _"a=8a06G  
if(l==r) return ; pJIv+  
mergeSort(data,temp,l,mid); },$0&/>ft  
mergeSort(data,temp,mid+1,r); g{k1&|  
for(int i=l;i<=r;i++){ ]3{0J  
temp=data; :3h{ A`u  
} uRV<?y%  
int i1=l; Av J4\  
int i2=mid+1; +~zXDBS9  
for(int cur=l;cur<=r;cur++){ ~`MS~,,  
if(i1==mid+1) k"UO c=   
data[cur]=temp[i2++]; l:B;zi`)oB  
else if(i2>r) 1`0#HSO  
data[cur]=temp[i1++]; #s-iy+/1oN  
else if(temp[i1] data[cur]=temp[i1++]; Y-!YhWsS  
else :a[Ihqfg  
data[cur]=temp[i2++]; tA.`k;LT  
} L71!J0@a#  
} nSx8E7 |V  
 (t^n'V  
} ~EiH-z4U  
n||A" @b\  
改进后的归并排序: ?i\;:<e4  
uYI@ 9U  
package org.rut.util.algorithm.support; y^>Q/H\  
fT\:V5-  
import org.rut.util.algorithm.SortUtil; )=pD%$iq  
} l 667N  
/** }=](p-]5  
* @author treeroot >pyj]y^3  
* @since 2006-2-2 1Nn@L2b 2  
* @version 1.0 Yf_6PGNzX  
*/ ;r\(p|e  
public class ImprovedMergeSort implements SortUtil.Sort { Z4TL6 ]^R  
R6;Phdh<>  
private static final int THRESHOLD = 10; b,H[I!. %  
;zTuKex~  
/* Ol /\t  
* (non-Javadoc) 6aO2:|:yP  
* +\ _{x/u1  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @LE[ac  
*/ f7urJ'!V  
public void sort(int[] data) { X?r48l??  
int[] temp=new int[data.length]; cV K7  
mergeSort(data,temp,0,data.length-1); 0rSIfYZa  
} \`.F\ Z  
+]xFoH  
private void mergeSort(int[] data, int[] temp, int l, int r) { Pf_F59"  
int i, j, k; 4p`XG1Pt  
int mid = (l + r) / 2; #EO1`9f48x  
if (l == r) 5FKBv e@  
return; JNI>VP[c  
if ((mid - l) >= THRESHOLD) ?WI3/>:<  
mergeSort(data, temp, l, mid); I_)*)d44_  
else fN%jJ-[d  
insertSort(data, l, mid - l + 1); MZv]s  
if ((r - mid) > THRESHOLD) UM%o\BiO  
mergeSort(data, temp, mid + 1, r); FjfN3#qlg  
else 9W7#u}Z  
insertSort(data, mid + 1, r - mid); j|fd-<ng  
le)DgIT>=  
for (i = l; i <= mid; i++) { 8ip7^  
temp = data; 5MTgK=c  
} Lm*VN~2  
for (j = 1; j <= r - mid; j++) { . v)mZp  
temp[r - j + 1] = data[j + mid]; 0BPMmk  
} ^>&k]T`  
int a = temp[l]; NUJ~YWO;  
int b = temp[r]; Wl"0m1G  
for (i = l, j = r, k = l; k <= r; k++) { t G.(flW,  
if (a < b) { m4w ') r~  
data[k] = temp[i++]; )emOKS  
a = temp; t@oK~ Nr  
} else { `iKj  
data[k] = temp[j--]; * A|-KKo\  
b = temp[j]; W`rNBfG>  
} #G]!%  
} FyL_xu\e  
} yqOuX>m1c  
4EP<tV  
/** DC+wD Bp;  
* @param data SS|z*h Z  
* @param l ;oO v/3  
* @param i }u{gR:lZ  
*/ gY AF'?  
private void insertSort(int[] data, int start, int len) { \,UZX&ip  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ;;s* Ohh  
} ,8G{]X)  
} Y(VJbm`  
} x|64l`Vp(:  
} vEe NW  
9.O8/0w7LV  
堆排序: k,Qsk d-N]  
:c[n\)U[aa  
package org.rut.util.algorithm.support; uwIc963  
uYG^Pc^v  
import org.rut.util.algorithm.SortUtil; WP **a Bp  
Q/>L_S  
/** I8Vb-YeS  
* @author treeroot `<"m%>  
* @since 2006-2-2 9Mm!%Hu  
* @version 1.0 yR~-k?7b  
*/ i7[uLdQ  
public class HeapSort implements SortUtil.Sort{ `BFIC7a  
~:Uw g+]j  
/* (non-Javadoc) g&/p*c_  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) f3*?MXxb16  
*/ K!AAGj`  
public void sort(int[] data) { /(C~~XP)  
MaxHeap h=new MaxHeap(); 7sNw  
h.init(data); 1Y xgR}7  
for(int i=0;i h.remove(); H&}ipaDO  
System.arraycopy(h.queue,1,data,0,data.length); ^t "iX9  
} #<7O08 :  
o`,Qku k  
private static class MaxHeap{ %i0?UpA  
&sVvWNO#2  
void init(int[] data){ lb' Cl3H  
this.queue=new int[data.length+1]; `'_m\uo  
for(int i=0;i queue[++size]=data; SU_SU".  
fixUp(size); ~q0*"\Ff  
} `Kl`VP=c  
} a@d=>CT$  
.4.pJbOg  
private int size=0; c8 K3.&P6  
3B0lb "e  
private int[] queue; [t]X/O3<  
f2)XP$:  
public int get() { he3SR @\T  
return queue[1]; rd|uz4d  
} Z^KA  
bBxw#_3A?E  
public void remove() { G`=r^$.3WB  
SortUtil.swap(queue,1,size--); 9<CG s3\  
fixDown(1); "v*8_El  
} L}{`h  
file://fixdown \Xrw"\")j  
private void fixDown(int k) { w*j$uW6{  
int j;  0IM8  
while ((j = k << 1) <= size) { "R #k~R  
if (j < size %26amp;%26amp; queue[j] j++; woH)0v  
if (queue[k]>queue[j]) file://不用交换 =/Aj  
break; %T`U^ Pnr  
SortUtil.swap(queue,j,k); =wu*D5  
k = j; 5m$2Ku  
} i@"e,7mSG  
} <pLT'Y=  
private void fixUp(int k) { gW(gJ; L,%  
while (k > 1) { {2'm^0Kl  
int j = k >> 1; Jhkvd<L8`m  
if (queue[j]>queue[k])  Fnx`Ri  
break; J<j&;:IRd  
SortUtil.swap(queue,j,k); T".]m7!  
k = j; TTNk r`  
} 8 }'|]JK  
} 3. WF}8  
8U2dcx:G3  
} VU|dV\>  
j|.} I  
} V) o,1  
  \J^  
SortUtil: 2+8#H.  
y9Y1PH7G  
package org.rut.util.algorithm; ]bCq=6ZKR  
] 7;f?+  
import org.rut.util.algorithm.support.BubbleSort; kW=z+  
import org.rut.util.algorithm.support.HeapSort; P%pp )BS  
import org.rut.util.algorithm.support.ImprovedMergeSort; }WFf''Z-  
import org.rut.util.algorithm.support.ImprovedQuickSort; }7<5hn E  
import org.rut.util.algorithm.support.InsertSort; Hq&"+1F  
import org.rut.util.algorithm.support.MergeSort; \~rlgxd  
import org.rut.util.algorithm.support.QuickSort; "+"{+k5t  
import org.rut.util.algorithm.support.SelectionSort; "GT4s?6O  
import org.rut.util.algorithm.support.ShellSort; @!=\R^#p  
{kI#A?M  
/** { Ng oYl  
* @author treeroot )+I.|5g  
* @since 2006-2-2 ZBD;a;wx  
* @version 1.0 R_P}~l  
*/ &Jc_Fc(M  
public class SortUtil { -XoPia2  
public final static int INSERT = 1; pI`?(5iK6|  
public final static int BUBBLE = 2; ~.Ik#At  
public final static int SELECTION = 3; G* %t'jX9  
public final static int SHELL = 4; wl=61 Mb  
public final static int QUICK = 5; -OZ 5vH0  
public final static int IMPROVED_QUICK = 6; ^:, l\Y  
public final static int MERGE = 7; RH0>ZZR  
public final static int IMPROVED_MERGE = 8; c2l_$p  
public final static int HEAP = 9;  2B~wHv  
l kIn%=Z  
public static void sort(int[] data) { z5\;OLJS,  
sort(data, IMPROVED_QUICK); `XTh1Z\  
} Upl6:xYrG  
private static String[] name={ |rRO@18dA  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" OY-w?'p?W  
}; zkM"cb13q/  
.uo.N   
private static Sort[] impl=new Sort[]{ C=Fzu&N}  
new InsertSort(), |C \}P  
new BubbleSort(), 4 fV3Ear=j  
new SelectionSort(), CLD-mx|?  
new ShellSort(), _gNz9$S  
new QuickSort(), 2U kK0ls  
new ImprovedQuickSort(), rf+:=|/_3  
new MergeSort(),  n]W_e  
new ImprovedMergeSort(), K?x,T8<aW  
new HeapSort() pV p:@0h  
}; `i~ Y Fr  
x  LBQ  
public static String toString(int algorithm){ 6Sj6i^"  
return name[algorithm-1]; ',7??Q7j&v  
} ?VU(Pq*`  
oj,lz?  
public static void sort(int[] data, int algorithm) { FX <b:#  
impl[algorithm-1].sort(data); }!#gu3  
} W" "*ASi  
<3PL@orO  
public static interface Sort { u),Qa=Wp  
public void sort(int[] data); TjK{9A  
} YKZrEP 4^  
7)rWw<mY  
public static void swap(int[] data, int i, int j) { WnFG{S{s  
int temp = data; NIr@R7MKd  
data = data[j]; k`HP "H  
data[j] = temp; bSwWszd~  
} ({0)@+V8  
} v <\A%  
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