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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。 ZXWm?9uw  
插入排序: j!a&l  
qPCI@5n3T?  
package org.rut.util.algorithm.support; az Oib=3fz  
'EkjySZ]F{  
import org.rut.util.algorithm.SortUtil; X|60W  
/** <|:$_&(  
* @author treeroot `iwGPG!  
* @since 2006-2-2 3d_g@x#9  
* @version 1.0 ) KYU[  
*/ 6x8lnXtA  
public class InsertSort implements SortUtil.Sort{ qp]s VY  
4WQ 96|F  
/* (non-Javadoc) YMn=9EUp  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ]T>YYz  
*/ x}N1Wl=8g  
public void sort(int[] data) { & )EL%o5  
int temp; a+n?y)u  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); [g: KFbEY  
} PMiG:bM  
} sAP  YQ  
} Ak2Vf0Eb  
?&.Eg^a"  
} hHsO?([99  
{^K&9sz  
冒泡排序: SS-7y:6y>  
iP?=5j=4  
package org.rut.util.algorithm.support; p2 m`pT  
it=ir9  
import org.rut.util.algorithm.SortUtil; SvD:UG  
)"^ )Nk  
/** Y-*]6:{E  
* @author treeroot ;3sJ7%`v  
* @since 2006-2-2 x]:B3_qR  
* @version 1.0 B{Lcx~  
*/ !p4FK]B/u  
public class BubbleSort implements SortUtil.Sort{ [JVUa2Sm  
T- lHlm  
/* (non-Javadoc) "ODs.m oq  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) &4Y@-;REt  
*/ [b@9V_  
public void sort(int[] data) { F#7A6|  
int temp; IQ9Rvnna  
for(int i=0;i for(int j=data.length-1;j>i;j--){ ==~ lc;  
if(data[j] SortUtil.swap(data,j,j-1); K_BF=C.k  
} {`[u XH?3d  
} z)p p{  
} rh(77x1|(G  
} ZRoOdo94  
AW`+lE'?  
} M Y>o8A  
u-~?ylh  
选择排序: J<7nOB}OD  
 xXZ {  
package org.rut.util.algorithm.support;  /w(t=Y  
7vK}aOs0  
import org.rut.util.algorithm.SortUtil; x^6sjfAW  
\jByJCN  
/** dn= g!=  
* @author treeroot VW\~OH  
* @since 2006-2-2 {;Y2O.lV  
* @version 1.0 7Ust7%  
*/ e/V8lo  
public class SelectionSort implements SortUtil.Sort { %%k`+nK~  
;=?KQq f  
/* $5#+;A'Q+  
* (non-Javadoc) :jljM(\  
* LXcH<)  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4w0Y(y  
*/ P/hIJV[  
public void sort(int[] data) { \BxE0GGky  
int temp; v8o{3wJ  
for (int i = 0; i < data.length; i++) { (]p,Z <f  
int lowIndex = i; ,;-55|o\V  
for (int j = data.length - 1; j > i; j--) { ]abox%U=%  
if (data[j] < data[lowIndex]) { _l!TcH+e  
lowIndex = j; ` Ui|T  
} /YH5s=  
} ih/MW_t=m=  
SortUtil.swap(data,i,lowIndex); HESORa;  
} >2?O-WXe  
} 0=Z_5.T>  
uE{nnNZy  
} vOYG&)Jm  
B*j AD2  
Shell排序: 2x&mJ}o#k  
vFGFFA/K}N  
package org.rut.util.algorithm.support; kkE1CHY  
7tr;adjs  
import org.rut.util.algorithm.SortUtil; c_^-`7g  
9hIcnPu  
/** _,;|,  
* @author treeroot QC*> qo  
* @since 2006-2-2 eZ~ZWb,%  
* @version 1.0 rZv5>aEI  
*/ U.HeIJ#  
public class ShellSort implements SortUtil.Sort{ ! FVXNl  
+gQoYlso  
/* (non-Javadoc) %rZJ#p[e)=  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) l~V^  
*/ F2$Z4%x#  
public void sort(int[] data) { bC@9 */i  
for(int i=data.length/2;i>2;i/=2){ ' |>  
for(int j=0;j insertSort(data,j,i); {`vv-[j|  
} (lY< \l  
} ^}4=pkJ;s  
insertSort(data,0,1); bl;C=n  
} J_^Ml)@iy  
e$+?l~  
/** O0i[GCtP5  
* @param data gLef6q{}  
* @param j 71ctjU`U2  
* @param i ?`%)3gx|  
*/ jP9)utEm6  
private void insertSort(int[] data, int start, int inc) { [EETx-  
int temp; A12#v,  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); J9 iQW  
} jI(}CT`g  
} y84= Q  
} )q48cQ  
,U#$Qb 12  
} w1+xlM,,9  
r-$SF5uv  
快速排序: |?Z;tAF!  
`|i[*+WC  
package org.rut.util.algorithm.support; GX+oA]  
 D|[~Py  
import org.rut.util.algorithm.SortUtil; KC-q]  
*VF UC:  
/** |-c)OS3#D  
* @author treeroot /~Q2SrYH  
* @since 2006-2-2 yI 6AafS~  
* @version 1.0 W c"f  
*/ 'bpx  
public class QuickSort implements SortUtil.Sort{ _f8<t=R  
C1@6 r%YD  
/* (non-Javadoc) C=6Vd  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [p+6HF  
*/ e!67Na0X(  
public void sort(int[] data) { p9[J 9D3~  
quickSort(data,0,data.length-1); > T,^n {_v  
} 0b0.xz\~U  
private void quickSort(int[] data,int i,int j){ &?=UP4[oif  
int pivotIndex=(i+j)/2; W^Jh'^E  
file://swap U[b $VZ}  
SortUtil.swap(data,pivotIndex,j); )kSE5|:pi  
b=!G3wVw<  
int k=partition(data,i-1,j,data[j]); mV0.9pxS  
SortUtil.swap(data,k,j); 09{B6l6P  
if((k-i)>1) quickSort(data,i,k-1); g pN{1  
if((j-k)>1) quickSort(data,k+1,j); 0# D4;v  
"+2Hde1  
} u[_~ !y  
/** b NBpt}$  
* @param data V3'QA1$  
* @param i e?%Qv+)W  
* @param j =Zcbfo_&  
* @return )/u?_)b4"  
*/ _-^Lr /`G!  
private int partition(int[] data, int l, int r,int pivot) { $~<);dYu0  
do{ at@B>Rb  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); 1YmB2h[Z  
SortUtil.swap(data,l,r); 0^Vc,\P?  
} rkdwGqG  
while(l SortUtil.swap(data,l,r); LO,G2]  
return l; LB|FVNW/S  
} p-H q\DP  
h[SuuW  
} XAV|xlfm  
$:R"IqDG  
改进后的快速排序: \Ze"Hv  
`Tx1?]  
package org.rut.util.algorithm.support; :bx q%D%|o  
OQ>r;)/  
import org.rut.util.algorithm.SortUtil; Br2ZloJ@+  
G!J{$0.  
/** x;,H>!r"i  
* @author treeroot }\E2Z[  
* @since 2006-2-2 smLXNO  
* @version 1.0 [.O 3z*[9#  
*/ _h4{Sx  
public class ImprovedQuickSort implements SortUtil.Sort { ]~:9b[G2  
SbmakNWJ}  
private static int MAX_STACK_SIZE=4096; kETu@la}  
private static int THRESHOLD=10; Z_oBZs  
/* (non-Javadoc) g|r:+%,M  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) RzG<&a3B3s  
*/ )6# i>c-  
public void sort(int[] data) { 8'Eu6H&$G  
int[] stack=new int[MAX_STACK_SIZE]; ZW$PJmz  
rAK}rNxI  
int top=-1; L`%v#R  
int pivot; )]"aa_20]  
int pivotIndex,l,r; Zs _Jn  
Zk*/~f|\  
stack[++top]=0; xyK_1n@b  
stack[++top]=data.length-1; DW ^E46k)A  
:^+ aJ]  
while(top>0){ P>/n!1c  
int j=stack[top--]; \vVGfG?6  
int i=stack[top--]; 1=x4m=wV  
>1[Hk0 <x  
pivotIndex=(i+j)/2; eJ+V!K'H2  
pivot=data[pivotIndex]; lPL>8.j  
aZGX`;3  
SortUtil.swap(data,pivotIndex,j); zfDx c3e  
q(0V#kKC  
file://partition >r] bfN,  
l=i-1; 9ZjSM,+  
r=j;  GU99!.$  
do{ `a}!t=~#w  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); tgn_\-+  
SortUtil.swap(data,l,r); .!T]sX_P  
} .l$'%AG:~  
while(l SortUtil.swap(data,l,r); P!q U8AJkt  
SortUtil.swap(data,l,j); H"8fnN=xB  
XJl2_#  
if((l-i)>THRESHOLD){ W)I)QinOH  
stack[++top]=i; VkCv`E  
stack[++top]=l-1; &KC^Vn3Nj  
} trL:qD+{(  
if((j-l)>THRESHOLD){ ~W'>L++  
stack[++top]=l+1; Mq!03q6  
stack[++top]=j; *6%!i7kr  
} b_xn80O  
Z)cGe1?q  
} ,"!t[4p=f  
file://new InsertSort().sort(data); j,")c'r&dD  
insertSort(data); 1*aw~nY0  
} oTj9/r  
/** xh[De}@  
* @param data J1kG'cH05  
*/ @Y":DHF5q  
private void insertSort(int[] data) { 3*9<JHu  
int temp; 6XPf0Gl  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); 9mW95YI S  
} )0Av:eF-+  
} EAYx+zI  
} O(BAw  
m'&^\7;D  
} ~3bn?'`  
dLQV>oF  
归并排序: HY[eo/nM1d  
Qzbelt@Wx  
package org.rut.util.algorithm.support; "|&xUWJ!)  
Gz)]1Z{%$  
import org.rut.util.algorithm.SortUtil; ,Q~C F;qe  
yZJR7+  
/** >, 22@4  
* @author treeroot 6A$ \I44  
* @since 2006-2-2 Tdvw7I-q  
* @version 1.0 l!z0lh- J  
*/ u\gPx4]4c  
public class MergeSort implements SortUtil.Sort{ wmu#@Hf/[h  
z>HeM Mei  
/* (non-Javadoc) 4#H~g @  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ghq#-N/t  
*/ ye Q6\yi  
public void sort(int[] data) { M5DW!^  
int[] temp=new int[data.length]; <=KtRE>$  
mergeSort(data,temp,0,data.length-1); GY9CU=-  
} JA'C\  
}$-;P=k  
private void mergeSort(int[] data,int[] temp,int l,int r){ 8jyg1NN D  
int mid=(l+r)/2; X.V6v4  
if(l==r) return ; ! Ff/RRo  
mergeSort(data,temp,l,mid); z)$X/v  
mergeSort(data,temp,mid+1,r); &_cMbFLBP  
for(int i=l;i<=r;i++){ <0!/7*;#ZT  
temp=data; 6`$HBX%.K  
} zX+NhTTB  
int i1=l; ^F @z +q  
int i2=mid+1; % j4  
for(int cur=l;cur<=r;cur++){ *^cJn*QeL  
if(i1==mid+1) EN^C'n  
data[cur]=temp[i2++]; cTW3\S=  
else if(i2>r) IyvJwrO  
data[cur]=temp[i1++]; Lw EI   
else if(temp[i1] data[cur]=temp[i1++]; MH;5gC@ `  
else A1`y_ Aj  
data[cur]=temp[i2++]; eq)8V x0  
} %hcn|-" F  
} Y_qRW. k  
cfn\De%.  
} 8 /3`rEW  
|q&&"SpA  
改进后的归并排序: y8/ 7@qw  
tz0_S7h  
package org.rut.util.algorithm.support; =b+W*vUAw  
nSWW^ ;  
import org.rut.util.algorithm.SortUtil; N;4tvWI  
$GI2rzh  
/** yHS=8!  
* @author treeroot hq}kAv4B=  
* @since 2006-2-2 p-d2HXo  
* @version 1.0 U j5%06  
*/ .<Y7,9;YEF  
public class ImprovedMergeSort implements SortUtil.Sort { DQ'yFPE  
b(<#n6a}\  
private static final int THRESHOLD = 10; *Mu X]JK  
:q6j{C(  
/* [kfLT::mT  
* (non-Javadoc) 0 t.'?=  
* $]eU'!2)  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) xO2e>[W  
*/ ySyA!Z  
public void sort(int[] data) { !`j}%!K!  
int[] temp=new int[data.length]; KMFvi_8  
mergeSort(data,temp,0,data.length-1); *;(wtMg  
} }u"iA^'Ot  
4.?tP7UE  
private void mergeSort(int[] data, int[] temp, int l, int r) { +&t`"lRl&  
int i, j, k;  "u#T0  
int mid = (l + r) / 2; ][Ne;F6  
if (l == r) {rp5qgVE<  
return; xiv1y4(%  
if ((mid - l) >= THRESHOLD) D]NfA2B7  
mergeSort(data, temp, l, mid); 9 U6cM-p?  
else ``l7|b jJ  
insertSort(data, l, mid - l + 1); )_$F/ug  
if ((r - mid) > THRESHOLD) u 3&9R)J1  
mergeSort(data, temp, mid + 1, r); zq(R!a6  
else 9NX/OctFa'  
insertSort(data, mid + 1, r - mid); nYfZ[Q>v  
)~((6?k4e  
for (i = l; i <= mid; i++) { (`z`ni  
temp = data; R?,Oh*  
} 7 (}gs?&w  
for (j = 1; j <= r - mid; j++) { "RZV v~BD  
temp[r - j + 1] = data[j + mid]; Xbm\"g \  
} Ne6]?\Z  
int a = temp[l]; n\ l$R!zr  
int b = temp[r]; 5 iz(R:P<  
for (i = l, j = r, k = l; k <= r; k++) { U _QCe+  
if (a < b) { r-Nv<oH;  
data[k] = temp[i++]; JqX+vRY;dd  
a = temp; "oZ$/ap\  
} else { /wF*@/PTH  
data[k] = temp[j--]; )U>JFgpIW  
b = temp[j]; Uc j eB  
} l]pHj4`uv  
} _z`g@[m:t  
} J Iw=Bs  
,U-aZ  
/** ;cye 'E  
* @param data v61'fQ1Qg!  
* @param l ,!m][  
* @param i K'Gv+UC*6  
*/ !N, Oe<  
private void insertSort(int[] data, int start, int len) { hB]\vA7  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); znNJ?  
} *G]zN"Y  
} I2U/ \  
}  4[\[Ho  
} WfnBWSA2 T  
5*Wo/%#q  
堆排序: U{^~X_?  
GIo7- 6kvm  
package org.rut.util.algorithm.support; 4 w$f-   
y":Y$v,P  
import org.rut.util.algorithm.SortUtil; x<mHTh:-V  
y@\R$`0J  
/** 8&gr}r- 5  
* @author treeroot #n9:8BKf  
* @since 2006-2-2 .BaU}-5  
* @version 1.0 "`QI2{!l  
*/ 9_~[  
public class HeapSort implements SortUtil.Sort{ Xup"gYTZQ  
Zx%ib8| j  
/* (non-Javadoc) {  S]"-x  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) tH7@oV;  
*/ 7Nw} }  
public void sort(int[] data) { v>e%5[F  
MaxHeap h=new MaxHeap(); }ZP;kM$g  
h.init(data); A7|CG[wZ  
for(int i=0;i h.remove(); FCk4[qOp7  
System.arraycopy(h.queue,1,data,0,data.length); |U~m8e&:  
} 8$c_M   
nUgZ]ag=G  
private static class MaxHeap{ 9>@@W#TK~  
N+l 0XjZD9  
void init(int[] data){ # p?7{"Ep  
this.queue=new int[data.length+1]; qUZm6)p6[a  
for(int i=0;i queue[++size]=data; v,=[!=8!  
fixUp(size); Sr9)i8x{  
} (JgW")M`cY  
} |zJxR_)  
\wyn  
private int size=0; 1;e"3x"  
 .<0s?Q  
private int[] queue; @xO?SjH  
G`a,(<kT;  
public int get() { 9;fyC =  
return queue[1]; m!Iax]D{  
} {~Q9jg(A  
RB\0o,mw4  
public void remove() { ~^6[SbVb  
SortUtil.swap(queue,1,size--); }qqE2;{ND  
fixDown(1); Awip qDAu  
} nBVR)|+M  
file://fixdown l'~~hQ{h/  
private void fixDown(int k) { zK*zT$<l  
int j; `|t X[':  
while ((j = k << 1) <= size) { a!_vd B  
if (j < size %26amp;%26amp; queue[j] j++; b1("(,r/`  
if (queue[k]>queue[j]) file://不用交换 <c,/+ lQ^  
break; d]kP@flOV  
SortUtil.swap(queue,j,k); -G!W6$Y  
k = j; @[:JQ'R=  
} u{H'evv0O  
} =p1aF/1$I  
private void fixUp(int k) { zF%'~S0{  
while (k > 1) { Ql%0%naq1  
int j = k >> 1; h{$mL#J  
if (queue[j]>queue[k]) Vy+%sG q"  
break; 4 ^=qc99  
SortUtil.swap(queue,j,k); |GDf<\  
k = j; yq?7!X  
} R%(ww  
} Hy?+p{{G  
tt|v opz  
} $. ;j4%%  
c`hj^t  
} t Q0vX@I<v  
%XpYiW#AK  
SortUtil: FXAP]iqo  
6I)1[tU  
package org.rut.util.algorithm; GN7\p)  
yf KJpy  
import org.rut.util.algorithm.support.BubbleSort; <`'^rCWI?  
import org.rut.util.algorithm.support.HeapSort; <@Lw '  
import org.rut.util.algorithm.support.ImprovedMergeSort; /c`s$h4-  
import org.rut.util.algorithm.support.ImprovedQuickSort; ,>DaS(  
import org.rut.util.algorithm.support.InsertSort; ! uC`7a  
import org.rut.util.algorithm.support.MergeSort; v Ft]n  
import org.rut.util.algorithm.support.QuickSort; H-*"%SJ  
import org.rut.util.algorithm.support.SelectionSort; 5i 6*$#OM_  
import org.rut.util.algorithm.support.ShellSort; g_2m["6*  
:4{;^|RgU  
/** liYR8D |  
* @author treeroot ,P?R 3  
* @since 2006-2-2 cY}Nr#%s@U  
* @version 1.0 U?MKZL7  
*/ Fu K(SP3  
public class SortUtil { .szs?  
public final static int INSERT = 1; 7_AR()CM  
public final static int BUBBLE = 2; 80/6-_g(  
public final static int SELECTION = 3;  Ji>  
public final static int SHELL = 4; WIe2j  
public final static int QUICK = 5; /1Xji 0LK  
public final static int IMPROVED_QUICK = 6; +O@v|}9"w3  
public final static int MERGE = 7; UE3#(:x A  
public final static int IMPROVED_MERGE = 8; a"!D @a  
public final static int HEAP = 9; :&]THUw  
~[J&n-bJU  
public static void sort(int[] data) { G 4jaHpPi  
sort(data, IMPROVED_QUICK); [@Db7]nG  
} (Ea)`'/  
private static String[] name={ bS0z\!1  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" nly`\0C  
}; -?8;-h, h  
Cq7EdK;x  
private static Sort[] impl=new Sort[]{ k)2L <Lmn  
new InsertSort(), SI:+I4i  
new BubbleSort(), 67uUeCW  
new SelectionSort(), </K"\EU  
new ShellSort(), :Sh>  
new QuickSort(), oSb,)k@  
new ImprovedQuickSort(), Wr\rruH6  
new MergeSort(), %"R|tlG  
new ImprovedMergeSort(), erG;M!9\  
new HeapSort() ^#H%LLt  
}; @K 8sNPK  
^9})@,(D  
public static String toString(int algorithm){ !MOgM  
return name[algorithm-1]; rb+&]  
} DA[s k7  
oGzZ.K3 A  
public static void sort(int[] data, int algorithm) { QR!8n  
impl[algorithm-1].sort(data); LL~bq(b  
} {+V1>6  
N'L3Oa\%  
public static interface Sort { wv 7j ES  
public void sort(int[] data); >?b9Xh  
} t^h {D   
x,Im%!h  
public static void swap(int[] data, int i, int j) { <y+8\m  
int temp = data; mWUo:(U  
data = data[j]; \Rc7$bS2H  
data[j] = temp; m6P!#=a:l<  
} tHhA _  
} u!([m; x|  
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