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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。 t-*VsPy  
插入排序: n=<NFkeX  
|dl0B26x  
package org.rut.util.algorithm.support; "t (1tWO1o  
+ AcKB82  
import org.rut.util.algorithm.SortUtil; ?o(ZTlT  
/** R/ ALR  
* @author treeroot z9k*1:  
* @since 2006-2-2 b"ol\&1 #  
* @version 1.0 msA' 5>  
*/ ShL1'Z} ^{  
public class InsertSort implements SortUtil.Sort{ PtVo7zO ye  
86;+r'3p.  
/* (non-Javadoc) pr62:  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) (*Gi~?-  
*/ }j+~'O4m  
public void sort(int[] data) { =F'l's^j  
int temp; f nLR  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); ffmG~$Yh_  
} 8N=%X-R%  
} ONjC(7  
} rmY,v  
]Y_{P~ZX  
} bDciZ7[b  
m!HC-[<  
冒泡排序: Pcs^@QP  
8 *4@-3Sx  
package org.rut.util.algorithm.support; _-4n ~(  
i_ |9<7a  
import org.rut.util.algorithm.SortUtil; ?o2;SY(-  
tx^92R2/  
/** +Od1)_'\D3  
* @author treeroot *A~($ZtL  
* @since 2006-2-2 K)<Wm,tON  
* @version 1.0 b\SXZN)Be  
*/ {c v;w  
public class BubbleSort implements SortUtil.Sort{ l?3vNa FeR  
/M0l p   
/* (non-Javadoc) 5xh!f%6  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) x2 w8zT6M  
*/ R'*<A3^  
public void sort(int[] data) { ^-gfib|VGe  
int temp; "-G&=(  
for(int i=0;i for(int j=data.length-1;j>i;j--){ >|l;*Kw,/P  
if(data[j] SortUtil.swap(data,j,j-1); P_,v5Qx"-  
} W0VA'W  
} D3<IuWeM  
} Jz~+J*r;]A  
} kmZ.U>#  
+\+Uz!YS  
} th5,HO~  
<'r0r/0g?  
选择排序: Iv'RLM  
NY4!TOp  
package org.rut.util.algorithm.support; NzjMk4t  
qru2h #  
import org.rut.util.algorithm.SortUtil; PYdIP\<V  
5."5IjZu  
/** {F;,7Kn+l  
* @author treeroot X}3P1.n:  
* @since 2006-2-2 ]WTf< W<  
* @version 1.0 ]O6KKz  
*/ x7vq?fP0n  
public class SelectionSort implements SortUtil.Sort { J9g|#1G  
/yLzDCKn  
/* aXRv}WO$>k  
* (non-Javadoc) +n@f'a">  
* JzHqNUn*M  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Z1VC5* K  
*/ Gh2#-~|cB  
public void sort(int[] data) { %GM>u2baw  
int temp; ^$e0t;W=  
for (int i = 0; i < data.length; i++) { /m97CC#+  
int lowIndex = i; `-~`<#E[  
for (int j = data.length - 1; j > i; j--) { x}v1X`6b  
if (data[j] < data[lowIndex]) { &J\B\`  
lowIndex = j; K|`+C1!  
} 6a7vlo  
} [m~b[ZwES  
SortUtil.swap(data,i,lowIndex); uZ@-e|qto  
} ksTzXG8  
} {d| |q<.-  
7raSf&{&6b  
} LEWa6'0rq  
S  <2}8D  
Shell排序: AnRlH  
qpoquWZ  
package org.rut.util.algorithm.support; - o4@#p>>  
\^Ep>Pq`]  
import org.rut.util.algorithm.SortUtil; 7 n\mj\  
$2Kau 1  
/**  ~q*i;*  
* @author treeroot PoJmW^:}  
* @since 2006-2-2 -UJ?L  
* @version 1.0 3voW  
*/ aD+0\I[x  
public class ShellSort implements SortUtil.Sort{ z9^c]U U)E  
~D*b3K 8X  
/* (non-Javadoc) <'W=]IAV  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ldK>HxM%Z  
*/ f(!E!\&n^  
public void sort(int[] data) { * nLIXnm  
for(int i=data.length/2;i>2;i/=2){ Ft3I>=f{  
for(int j=0;j insertSort(data,j,i); BlL|s=dlQV  
} nHnk#SAA u  
} xsYE=^uv  
insertSort(data,0,1); t @;WgIp(&  
} 7LG+$LEz  
ZOp^`c9~  
/** oL#xDG  
* @param data ]+mjOks~  
* @param j 3u*82s\8T  
* @param i WPtMds4  
*/ J`W-]3S#  
private void insertSort(int[] data, int start, int inc) { A1Ka(3"  
int temp;  -H`\? R  
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); ]\7lbLv  
} X R4)z  
} [$^A@bqk  
} Np$z%ewK.  
^,+nef?=  
} #^Ys{  
^/k ,  
快速排序: AfN&n= d K  
,6DD=w0r  
package org.rut.util.algorithm.support; u %'y_C3  
 QGXQ{  
import org.rut.util.algorithm.SortUtil; B "*`R!y  
y86))  
/** 0D<TF>M;pn  
* @author treeroot \9'!"-i  
* @since 2006-2-2 p'gb)nI  
* @version 1.0 I'dj.  
*/ cs t&0  
public class QuickSort implements SortUtil.Sort{ W+.{4 K  
inZi3@h)T  
/* (non-Javadoc) 8`*`nQhWa  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) \2j|=S6  
*/ BMdSf(l  
public void sort(int[] data) { 6ga5^6W  
quickSort(data,0,data.length-1); kff ZElV  
} BY$[g13  
private void quickSort(int[] data,int i,int j){ 9_GokU P_  
int pivotIndex=(i+j)/2; yQ'eu;+]  
file://swap -3` "E%9  
SortUtil.swap(data,pivotIndex,j); N};t<Xev  
a&C.=  
int k=partition(data,i-1,j,data[j]); 7lwTZ*rnY  
SortUtil.swap(data,k,j); R5~gH6K|  
if((k-i)>1) quickSort(data,i,k-1); '#A:.P  
if((j-k)>1) quickSort(data,k+1,j); Xk?R mU6  
qcYNtEs*c  
} y+A{Y  
/** Ew]<jF|.#  
* @param data c yP,[?N  
* @param i H'Ln P>@n#  
* @param j PS$k >_=t  
* @return }a^|L"  
*/ 9#Bx]wy  
private int partition(int[] data, int l, int r,int pivot) { (')(d HHW  
do{ 8aZ$5^z  
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); h8jB=e, H  
SortUtil.swap(data,l,r); +}U2@03I  
} ~,gLplpG0  
while(l SortUtil.swap(data,l,r); ~r&D6Y  
return l; TY~Vi OC  
} 5}XvL'  
};r|}v !~_  
} 7TpRCq#  
(N0sE"_~I5  
改进后的快速排序: O:e#!C8^  
@o&Ytd;i  
package org.rut.util.algorithm.support; ?Wa<AFXQ  
LWD#a~  
import org.rut.util.algorithm.SortUtil; nv)))I\  
w.uK?A>W,  
/** !R6ApB4ZI  
* @author treeroot (ii( yz|  
* @since 2006-2-2 ,#d[ad<  
* @version 1.0 `eC+% O  
*/ +ubnx{VC  
public class ImprovedQuickSort implements SortUtil.Sort { ?}8IQxU  
# $~ oe"  
private static int MAX_STACK_SIZE=4096; cIb4-TeV  
private static int THRESHOLD=10; r|fO7PD  
/* (non-Javadoc) 5)`h0TK  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Xm|ib%no  
*/ ,9\Snn  
public void sort(int[] data) { 76bc]o#  
int[] stack=new int[MAX_STACK_SIZE]; Y@%`ZPJ  
iP#=:HZu;  
int top=-1; J {tVa(.  
int pivot; W#{la`#Bu  
int pivotIndex,l,r; h/K@IA d  
+c) TDH  
stack[++top]=0; #9:2s$O[x  
stack[++top]=data.length-1; EnJ!mr  
=EpJZt  
while(top>0){ _mk5^u/u  
int j=stack[top--]; 1TZPef^y  
int i=stack[top--]; +s~.A_7)  
\|t{e8}  
pivotIndex=(i+j)/2; f4"4ZVcr  
pivot=data[pivotIndex]; o @KW/RN"  
LuS+_|]x  
SortUtil.swap(data,pivotIndex,j); f{ ^:3"i  
 iSiDSeW8  
file://partition  %w5[*V  
l=i-1; J +q|$K6  
r=j; Qqq <e  
do{ lhO2'#]i  
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); Pl78fs"L@  
SortUtil.swap(data,l,r); Qx t@ V  
} g5Td("& n  
while(l SortUtil.swap(data,l,r); [/$N!2'5  
SortUtil.swap(data,l,j); TzKK;(GX  
wkBL=a  
if((l-i)>THRESHOLD){ Q7GY3X*kA  
stack[++top]=i; N4wA#\-  
stack[++top]=l-1; m|F:b}0Hb  
} w z=z?AZW  
if((j-l)>THRESHOLD){ HnU Et/  
stack[++top]=l+1; ,@.EpbB  
stack[++top]=j; URw5U1  
} K9|7dvzC:  
!h:  Q  
} eW50s`bKY  
file://new InsertSort().sort(data); <n^3uXzD  
insertSort(data); W&C-/O,m  
} Gx'TkU=  
/** fu]N""~  
* @param data ipjkZG@  
*/ H~o <AmE0!  
private void insertSort(int[] data) { |" 7 Y52d  
int temp; t&}6;z 3  
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); y LM"+.?pL  
} rMp9jG@3   
} {rXs:N@  
} 61@EDIYPc  
o8ppMM8_R[  
} W)4QOS&  
^E,1V5  
归并排序: Z<"K_bj   
> 0.W`j(s  
package org.rut.util.algorithm.support; Eju~}:Lo  
WG5W0T_  
import org.rut.util.algorithm.SortUtil; M_|> kp  
!w2gGy:I>  
/** 6+` tn  
* @author treeroot Yc;ec9~  
* @since 2006-2-2 gQouOjfP  
* @version 1.0 RiR:69xwR*  
*/ e;ty!)]  
public class MergeSort implements SortUtil.Sort{ 79BaDB`{a  
`.v(fC  
/* (non-Javadoc) 9 26Tl  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }V`mp  
*/ yPgmg@G@/  
public void sort(int[] data) { ir[jCea,  
int[] temp=new int[data.length]; >NM\TLET~  
mergeSort(data,temp,0,data.length-1); Bs!4H2@{(]  
} zp4W'8  
\40 YGFO  
private void mergeSort(int[] data,int[] temp,int l,int r){ &.N $  
int mid=(l+r)/2; r;m`9,RW  
if(l==r) return ; p#@Z$gTH`'  
mergeSort(data,temp,l,mid); O#_b7i  
mergeSort(data,temp,mid+1,r); shgAhx  
for(int i=l;i<=r;i++){ `xz&Scil  
temp=data; yL1CZ_  
} 2]WE({P  
int i1=l; mT.e>/pa  
int i2=mid+1; ,pt%) c  
for(int cur=l;cur<=r;cur++){ 8;"*6vHZ  
if(i1==mid+1) R_kQPP  
data[cur]=temp[i2++]; Q@QFV~  
else if(i2>r) k6**u  
data[cur]=temp[i1++]; ;[$n=VX`  
else if(temp[i1] data[cur]=temp[i1++]; )=^w3y  
else EKZVF`L  
data[cur]=temp[i2++]; ]%dnKP~  
} :}q\tNY<  
} \2kPq>hu  
^g>1U5c  
} ~?Omy8#  
<J{'o`{  
改进后的归并排序: I+;-p]~  
Tg ?x3?kw  
package org.rut.util.algorithm.support; f CcD&<%  
.v\\Tq&"|  
import org.rut.util.algorithm.SortUtil; ~;#MpG;e  
}!d;(/)rb  
/** *}! MOqP  
* @author treeroot '0t-]NAc  
* @since 2006-2-2 [aqu }Su  
* @version 1.0 KfY$ka[}"S  
*/ ,,<PVTd  
public class ImprovedMergeSort implements SortUtil.Sort { uCP>y6I  
rrBAQY|.  
private static final int THRESHOLD = 10; Mz=!w]qDH  
yTBS=+X  
/* [=%YV# O  
* (non-Javadoc) l{WjDed  
* Oejq@iM"(  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) , c;eN  
*/ r':TMhzHq?  
public void sort(int[] data) { :@3Wg3N  
int[] temp=new int[data.length]; /Cr/RG:OX  
mergeSort(data,temp,0,data.length-1); b.yh8|&  
} 0GXO&rCG  
Y)I8eU{Wl(  
private void mergeSort(int[] data, int[] temp, int l, int r) { KeBQH8A1N  
int i, j, k; *nTU# U  
int mid = (l + r) / 2; 8im@4A+n`  
if (l == r) /VTM 9)u  
return; USPTpjt8R  
if ((mid - l) >= THRESHOLD) ANMg  
mergeSort(data, temp, l, mid); ~H6;I$e[  
else \h{r;#g  
insertSort(data, l, mid - l + 1); |M~ON=  
if ((r - mid) > THRESHOLD) %y`7);.q  
mergeSort(data, temp, mid + 1, r); yy2I2Bv  
else cu7(.  
insertSort(data, mid + 1, r - mid); ,LYFEq_  
(9RslvK L  
for (i = l; i <= mid; i++) { ?Dsm~bkX[  
temp = data; P=8>c'Q  
} F?4(5 K  
for (j = 1; j <= r - mid; j++) { kCP$I732  
temp[r - j + 1] = data[j + mid]; m <k!^jp  
} RDQ^dui  
int a = temp[l]; 6f%DpJ:$U  
int b = temp[r]; RMXzU  
for (i = l, j = r, k = l; k <= r; k++) { yJJ4~j){l  
if (a < b) { EeQ5vqU  
data[k] = temp[i++]; yJ2B3i@T 4  
a = temp; 4&X*pL2;  
} else { g /+oZU  
data[k] = temp[j--]; WE!vSZ3R  
b = temp[j]; 'c`jyn  
} (?&=T.*^  
} ;h/pnmhP  
} 2j&@ p>  
>yK0iK{  
/** ${&5]!E[>D  
* @param data E l&h;N   
* @param l rAqxTdF  
* @param i & eZfQ27$  
*/ 1cJsj  
private void insertSort(int[] data, int start, int len) { i u]&;  
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); tpf7_YP_!-  
} +C{p%`<  
} A}VYb:u/  
} (!K_Fy@  
} Oe]&(  
I4_d[O9  
堆排序: lX!`zy{3k  
i^"+5Eq[D  
package org.rut.util.algorithm.support; U9d:@9Y  
}ZOFYu0f  
import org.rut.util.algorithm.SortUtil; @ GDX7TPV  
QB{rVI>mI!  
/** }xb=<  
* @author treeroot OEgI_= B  
* @since 2006-2-2 9}tG\0tL*  
* @version 1.0 h 8 @  
*/ @9G- m(?*  
public class HeapSort implements SortUtil.Sort{ df*w>xS  
RuRt0Sd3  
/* (non-Javadoc) f"5g>[ 1  
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +Ezgn/bS&  
*/ JWO=!^  
public void sort(int[] data) { =P77"Dd  
MaxHeap h=new MaxHeap(); TYgQJW?  
h.init(data); |$lwkC)O  
for(int i=0;i h.remove(); o>D  
System.arraycopy(h.queue,1,data,0,data.length); '` CspY  
} \' li  
akuJz  
private static class MaxHeap{ R MYP"  
-e@!  
void init(int[] data){ $ChK]v 6C  
this.queue=new int[data.length+1]; }-<zWI {p  
for(int i=0;i queue[++size]=data; qCMl!g'  
fixUp(size); ]dPZ.r  
} p='-\M74K  
} hsLzj\)6  
hP@(6X,"  
private int size=0; wo^Sy41bF  
(&\aA 0-}H  
private int[] queue; ;e8V +h  
/\d$/~BFi  
public int get() { UHO_Z  
return queue[1]; ] gb=  
} S[:xqzyDg  
irBDGT~  
public void remove() { g^>#^rLU  
SortUtil.swap(queue,1,size--); GR4?BuY,  
fixDown(1); H^%.=kf  
} -`c :}m  
file://fixdown Ju` [m  
private void fixDown(int k) { } /^C|iS7  
int j;  q" @  
while ((j = k << 1) <= size) { `cB_.&  
if (j < size %26amp;%26amp; queue[j] j++; D$e B ,~  
if (queue[k]>queue[j]) file://不用交换 /'DwfX  
break; 7Hw<ojkt  
SortUtil.swap(queue,j,k); }odV_WT  
k = j; ,Fqz e/  
} pb;")Q'  
} {y^3> 7  
private void fixUp(int k) { =d;Vk  
while (k > 1) { !cEG}(|h  
int j = k >> 1; $A\m>*@  
if (queue[j]>queue[k]) ekSY~z=/u  
break; i^z`"3#LE  
SortUtil.swap(queue,j,k); P1zK2sL_  
k = j; !E\[SjY@J  
} }qPhx6nP  
} 'md0]R|  
tB(4Eq \  
} f>Td)s1 M  
uYO|5a<f~  
} rjA@U<o  
e,1u  
SortUtil: W=}Okq)x9I  
/!FWuRe^  
package org.rut.util.algorithm; *=F(KZ  
B33$ u3d  
import org.rut.util.algorithm.support.BubbleSort; *tQk;'/A]  
import org.rut.util.algorithm.support.HeapSort; M++0zhS  
import org.rut.util.algorithm.support.ImprovedMergeSort; WV<tyx9Z  
import org.rut.util.algorithm.support.ImprovedQuickSort; 8s}J!/2  
import org.rut.util.algorithm.support.InsertSort; zi]%Zp  
import org.rut.util.algorithm.support.MergeSort; jh ez  
import org.rut.util.algorithm.support.QuickSort; .q`{Dgc~  
import org.rut.util.algorithm.support.SelectionSort; #G^A-yjn  
import org.rut.util.algorithm.support.ShellSort; Sq]pQ8  
jB$SUO`*  
/** g;p)n  
* @author treeroot H3/caN:  
* @since 2006-2-2 1cN')"  
* @version 1.0 VAQ)Hc]  
*/ [ .yJV`  
public class SortUtil { =5]n\"/  
public final static int INSERT = 1; ?^!,vh  
public final static int BUBBLE = 2; yOXO)u1n  
public final static int SELECTION = 3; Q'NmSX)0  
public final static int SHELL = 4; 9>*c_  
public final static int QUICK = 5; czWw~'."  
public final static int IMPROVED_QUICK = 6; 4 2) mM#  
public final static int MERGE = 7; ,i}|5ozj4  
public final static int IMPROVED_MERGE = 8; \|= mD}N  
public final static int HEAP = 9; n$+M%}/f  
'%iPVHK7  
public static void sort(int[] data) { )6oGF>o>  
sort(data, IMPROVED_QUICK); 5a`%)K  
} |WQ9a' '  
private static String[] name={ O_,O,1  
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" U..<iNQE5  
}; [IX+M#mf  
f_mhD dq  
private static Sort[] impl=new Sort[]{ .QWhK|(.!  
new InsertSort(), =jAFgwP\  
new BubbleSort(), lP<I|O=z  
new SelectionSort(), Se^^E.Z,W  
new ShellSort(), >wON\N0V_  
new QuickSort(), -e-e9uP  
new ImprovedQuickSort(), E0f{iO;}  
new MergeSort(), xN->cA$A  
new ImprovedMergeSort(), y2Bh?>pg  
new HeapSort() :KE/!]z  
}; Pi6C/$ K  
5>0.NiXGf'  
public static String toString(int algorithm){ "cUg>a3  
return name[algorithm-1]; i2,U,>.  
} 1JS2SxF  
T|4snU2M  
public static void sort(int[] data, int algorithm) { Z| 6{T  
impl[algorithm-1].sort(data); d.F)9h]XHO  
} !XE aF]8  
&_-](w`  
public static interface Sort { LK7Xw3  
public void sort(int[] data); , |E$'  
} HxwlYx,4  
-AD2I {C  
public static void swap(int[] data, int i, int j) { |Fln8wB  
int temp = data; C".1+Um  
data = data[j]; NlPS#  
data[j] = temp; 2Oc$+St~8  
} ? 5|/ C  
} 2ypIq  
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