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。 BPv>$
m+.
插入排序: fjG&`m#"
`@Oa lg
package org.rut.util.algorithm.support; + ulagE|7
!*{q^IO9v&
import org.rut.util.algorithm.SortUtil; =(o']ZaaA
/** d`y!cu2}
* @author treeroot 5,)vJ,fs
* @since 2006-2-2 (xpn`NA
* @version 1.0 *O~e
T
*/ 5(m(xo6
public class InsertSort implements SortUtil.Sort{ W7sn+g\
[?0d~Q(R#
/* (non-Javadoc) cU.9}-)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4hs)b
*/ B?bW1
public void sort(int[] data) { >jg0s)RA'
int temp; r!
%;R?c
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); |nUl\WRd\
} %aRT>_6"
} WXw}^v
} GVGlVAo|@
V3Z]DA
} g}LAks
0#_'o ,
冒泡排序: i3$$,W!
fyknP)21I
package org.rut.util.algorithm.support; Lgk
dT|vYK}\
import org.rut.util.algorithm.SortUtil; sD;M!K_
hX:"QXx
/** \ 0W!4D
* @author treeroot zUJZ`seF
* @since 2006-2-2 <y.]ImO
* @version 1.0 p>w]rE:}
*/ b97w^ah4gJ
public class BubbleSort implements SortUtil.Sort{ ULJ mSe
o 5U(i
/* (non-Javadoc) X}ma]
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) WJH\~<{mP
*/ !]yO^Ob.E
public void sort(int[] data) { KngTc(^_D
int temp; zAzP,1$?
for(int i=0;i for(int j=data.length-1;j>i;j--){ mHc>"^R
if(data[j] SortUtil.swap(data,j,j-1); FS6`6M.K
} as yZe
} {i0SS
}
]:M0Kj&h
} :rMM4
I#F!N6;
} w8S!%abl1
k <iTjI*N
选择排序: n{*D_kM(H
"*1f;+\
package org.rut.util.algorithm.support; {^a36i
Z<[<n0o1
import org.rut.util.algorithm.SortUtil; \JEXX4%
m,i,n9C->
/** pKiZ)3U
* @author treeroot N["W Ir
* @since 2006-2-2 t]jFo
* @version 1.0 *g}Yw
*/ YHkcWz
public class SelectionSort implements SortUtil.Sort { E>'a,!QPv
c/N@zum,{
/* 9I27TKy
* (non-Javadoc) sV"UI
* i<kD
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) q;g>t5]a
*/ l/TjQ*
public void sort(int[] data) { Z;Ez"t&U
int temp; W&*f#E
for (int i = 0; i < data.length; i++) { MTg:dR_
int lowIndex = i; a7zcIwk
'{
for (int j = data.length - 1; j > i; j--) { . o7m!
if (data[j] < data[lowIndex]) { `nM/l@
lowIndex = j; o8/;;*
} KqBk~-G
} #} ~qqJ G2
SortUtil.swap(data,i,lowIndex); -}O1dEn.
} vE@!{*
} ~(!XY/0e
&,A64y
} ?Nf>]|K:Q
C2LL|jp*
Shell排序: An;MVA
5pr"d@.
package org.rut.util.algorithm.support; +/,icA}PI
_vSn`
import org.rut.util.algorithm.SortUtil; drzL.@h|
:I -V_4b
/** .+7;)K
* @author treeroot 7S/G
B
* @since 2006-2-2 HEA#bd\
* @version 1.0 \^ghdU
*/ Dd;Nz
public class ShellSort implements SortUtil.Sort{ (?_S6HE
qmO6,T-|
/* (non-Javadoc) @1*ohdHH
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +fvaUV_-
*/ FZ!`B]]le,
public void sort(int[] data) { il|1a8M2~
for(int i=data.length/2;i>2;i/=2){ ~ P~
for(int j=0;j insertSort(data,j,i); M@ed>.
}
;};wq&b#
} z<H~ItX,n
insertSort(data,0,1); u[nyW3MZ
} 6qcO?U
@-UL`+
/** .>Ljnk
* @param data DXz}YIEC
* @param j H*#s
}9=kZ
* @param i fRg`UI4w}
*/ I%-
" |]$
private void insertSort(int[] data, int start, int inc) { t]7&\ihZi~
int temp; n1!?"m!
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); XsnF~)YW
} J7r|atSk
} D8
hr?:I9
} T&Lb<'f
O_Oj|'bBC
} >3z5ww
7S?4XyU/o
快速排序: ?LvCR_D:
h;6lK$!c
package org.rut.util.algorithm.support; dtp oU&?6s
eut-U/3: #
import org.rut.util.algorithm.SortUtil; =Q.^c.sw
`QXErw
/** gvLf|+m
* @author treeroot l8?>>.<P=
* @since 2006-2-2 >yULC|'F&~
* @version 1.0 >uSy
*/ 5-M&5f.
public class QuickSort implements SortUtil.Sort{ p\<u6v ~J
K"r*M.P>
/* (non-Javadoc) lyGhdgWc
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) P'`r
*/ XHK70: i
public void sort(int[] data) { 1;{Rhu7*
k
quickSort(data,0,data.length-1); qTqwPWW*
} >/8y GBD
private void quickSort(int[] data,int i,int j){ 0PWg;>^'
int pivotIndex=(i+j)/2; :53)Nv
file://swap Ry'= ke
SortUtil.swap(data,pivotIndex,j); )Q.>rX,F
s D=n95`v
int k=partition(data,i-1,j,data[j]); cZ|\.0-
SortUtil.swap(data,k,j); 6b:tyQ
if((k-i)>1) quickSort(data,i,k-1); ;dJ1
if((j-k)>1) quickSort(data,k+1,j); /K(o]J0F
=F@Wgn,
} c`o7d)_Ke
/** MgY0q?.S=
* @param data Y 1t\iU
* @param i uB]b}"+l
* @param j I= &stsH
* @return PBp^|t]E>
*/ R.yC(r
private int partition(int[] data, int l, int r,int pivot) { 4 XAQVq5
do{ HbxL:~:}J
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); 6E^.7%3
SortUtil.swap(data,l,r); 3h *!V6%q
} lk( }-
while(l SortUtil.swap(data,l,r); {o>j6RS\
return l; D`$hPYK|_
} @9lUSk^9
v^1pN>#%g
} SF>c\eTtx
&8vCZN^
改进后的快速排序: |%'
nVxc4r
CL+}|7O(
package org.rut.util.algorithm.support; `nZ )>
[@5Ytv H
import org.rut.util.algorithm.SortUtil; L{8xlx`
rl#p".4q
/** HlH64w2^R
* @author treeroot L:i-BI`J
* @since 2006-2-2 [m|YWT=
* @version 1.0 PEc=\?
*/ :>Ay^{vf=
public class ImprovedQuickSort implements SortUtil.Sort { R~S;sJ& c
}n4V|f-
private static int MAX_STACK_SIZE=4096; xo7Kn+ Kl
private static int THRESHOLD=10; Kq;8=xP[
/* (non-Javadoc) vy\RcP
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) eep1I
:N
*/ '2[albxSc
public void sort(int[] data) { j4cwI90=
int[] stack=new int[MAX_STACK_SIZE]; rV T{90,
1f":HnLRM
int top=-1; #?/<
int pivot; d%V*|0c)
int pivotIndex,l,r; Pc
NkAo
i:OK8Q{VI
stack[++top]=0; *1fb}C_
stack[++top]=data.length-1; V{:A3C41
xUa{1!Y8
while(top>0){ cT!\{~
int j=stack[top--]; F!]lU`z)=
int i=stack[top--]; 7~5ym15*
?B}{GL2)
pivotIndex=(i+j)/2; $h*L=t(
pivot=data[pivotIndex]; 8n*.).33
<w)r`D6
SortUtil.swap(data,pivotIndex,j);
+7=K/[9p
z<##g
file://partition mjKS{
l=i-1; fvdU`*|n)
r=j; B(n{e53 9f
do{ hHT_V2*
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); z$?~Y(EY
SortUtil.swap(data,l,r); f]\CD<g3|E
} R'!
while(l SortUtil.swap(data,l,r); /XzH?n/{R
SortUtil.swap(data,l,j); ,Q
HU_jt
u (em&M
if((l-i)>THRESHOLD){ &8g?4v
stack[++top]=i; ucG@?@JENm
stack[++top]=l-1; 6 1F(<!
} 93`
AWg/T
if((j-l)>THRESHOLD){ 3v5%y'
stack[++top]=l+1; X;"Sx#U
stack[++top]=j; >JC
} {ZI)nQ{
^]W<X"H+Z
} {6_|/KE9_
file://new InsertSort().sort(data); --|Wh^i>?
insertSort(data); WYEKf9}
} k6sI
L3QJ0
/** }Du}c3
* @param data 'i4_`^:+
*/ ).sRv6/c
private void insertSort(int[] data) { a{qM2P(S
int temp; ZI 3Nq
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); #nK>Z[
} %\H|B0
} `m!j$,c.
} _U
|>b>
o .qf _A
} oBzfbg8p
H\:lxR^
归并排序: |Y [wzDYV
d+Ek%_
package org.rut.util.algorithm.support; T^~5n6
JAQb{KefdO
import org.rut.util.algorithm.SortUtil; "6us#T
9+{G8$Ai
/** S=e{MI
* @author treeroot uoX:^'q
* @since 2006-2-2 EB2!Hp uQ3
* @version 1.0 -wSg2'b4E
*/ 1>E<8&2[L
public class MergeSort implements SortUtil.Sort{ ZRg;/sX]
SVB \
/* (non-Javadoc) ~,5gUl?Il
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5[YDZ7g"~
*/ fM^qQM[lG
public void sort(int[] data) { PSZL2iGj9V
int[] temp=new int[data.length]; NR5oIKP?
mergeSort(data,temp,0,data.length-1); qx4I_%
} IbP#_Vt
|,!IZ-
th
private void mergeSort(int[] data,int[] temp,int l,int r){ 8$;=Uf,x
int mid=(l+r)/2; ]2\VweV
if(l==r) return ; 79xx2
mergeSort(data,temp,l,mid); EodQ*{l
mergeSort(data,temp,mid+1,r); -<
&D
for(int i=l;i<=r;i++){ L&%s[
temp=data; !VI]oRgP
} DIzH`|Y
int i1=l; b+&%1C
int i2=mid+1; |qmu_x\
for(int cur=l;cur<=r;cur++){ gm[z[~X@
if(i1==mid+1) {yB&xj[z
data[cur]=temp[i2++]; aM:nOt" S1
else if(i2>r) $l|qk z
data[cur]=temp[i1++]; HLZ;8/|48m
else if(temp[i1] data[cur]=temp[i1++]; U~j
^I^
else 0QOBL'{7)
data[cur]=temp[i2++]; */|9= $54
} MgNU``
} 6Qy@UfB
!=:$lzS^
} h}cy D7Wn
/i-J&*6_
改进后的归并排序: !cAyTl(_
\&i P`v`K
package org.rut.util.algorithm.support; D0#x
Lh
!H irhDN
import org.rut.util.algorithm.SortUtil; 0 rXx RQ
[5MJwRM^!;
/** P5#r,:zL
* @author treeroot F>-B3x
* @since 2006-2-2 .G)(0z("s
* @version 1.0 Q'YH>oGh^
*/ '=G|Sq^aO
public class ImprovedMergeSort implements SortUtil.Sort { f/Hm{<BY
]b%Hy
private static final int THRESHOLD = 10; ?$6Y2
pk3<|
/* 6u`)QUmItg
* (non-Javadoc) C~N/A73gF
* %y|)=cm[
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {jho&Ai
*/ k'IYA#T6
public void sort(int[] data) { R@6zGZ1
int[] temp=new int[data.length]; jlBanGs?
mergeSort(data,temp,0,data.length-1); i]|Yg$
} we;G]`@?
lq> +~zX{
private void mergeSort(int[] data, int[] temp, int l, int r) { !2'jrJGc
int i, j, k; L?Qg#YSd~
int mid = (l + r) / 2; (
|PAx(
if (l == r) \CXQo4P
return; :I:!BXQT$
if ((mid - l) >= THRESHOLD) 4x;/HEb7?
mergeSort(data, temp, l, mid); HaYE9/xS
else 2#<xAR
insertSort(data, l, mid - l + 1); %d>=+Ds[
if ((r - mid) > THRESHOLD) a(9L,v#?
mergeSort(data, temp, mid + 1, r); A%D7bQ
else b r^_'1
insertSort(data, mid + 1, r - mid); rZfN+S,g
lI-L`
x
for (i = l; i <= mid; i++) { o_D?t-XH
temp = data; -R%<.]fJ
} 7A\~)U@
for (j = 1; j <= r - mid; j++) { ]Qfn(u=o
temp[r - j + 1] = data[j + mid]; ,^x4sA[/
} T:IW%?M
int a = temp[l]; N#Zhxu,g!
int b = temp[r]; ^H2-RBE#
for (i = l, j = r, k = l; k <= r; k++) { z-LB^kc8oQ
if (a < b) { HKqwE=NZ
data[k] = temp[i++]; ld^=#]g
a = temp; >9q&PEc
} else { |iR T!
]
data[k] = temp[j--]; ;3kj2}
b = temp[j]; E2"q3_,,
} fVt9X*xKS
} t7m>A-I
} |pmZ.r
6q]5Es<
/** |ZCn`9hvn
* @param data 8 XICF
* @param l xZQg'IT
* @param i YQpSlCCo
3
*/ <%Ostqj
private void insertSort(int[] data, int start, int len) { F6K4#t+9
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); +> WM[o^I
} 05spovO/'
} e?Ho a$k
} y-j\zK
} #SX8=f`K5
qOUqs'7/]
堆排序: Ty<L8+B|
qWx][D"
package org.rut.util.algorithm.support; sz)oZPu|
7\9>a
import org.rut.util.algorithm.SortUtil; C%U`"-%n@7
GD:4"$)[o
/** RtCkV xaEx
* @author treeroot .{=$!8|&I9
* @since 2006-2-2 S=nP[s
* @version 1.0 >A<bBK#
*/ }>'PT-
public class HeapSort implements SortUtil.Sort{ 2OwV^-OG
PIWux{
/* (non-Javadoc) ]b= P=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) `d[1`P1i[
*/ UH"#2< |b
public void sort(int[] data) { r.T<j.\
MaxHeap h=new MaxHeap(); TD9;kN1`
h.init(data); 7As|Ns`
for(int i=0;i h.remove(); %uoQ9lD'
System.arraycopy(h.queue,1,data,0,data.length); Rt{B(L.?<
} |0\0a&tkPl
6sE{{,OGB
private static class MaxHeap{ "F}'~HWZp
t(+)#
void init(int[] data){ K^ 3co
this.queue=new int[data.length+1]; 1=nUW":
for(int i=0;i queue[++size]=data; 0V{(Ru.O
fixUp(size); .(X
lg-H,
} NO0"* c ;
} 9XHz-+bQ
Mze;k3
private int size=0; h@@nR(<i
eXkujjSw"
private int[] queue; (__yh^h:m
Z1h]
public int get() { je6CDF qw
return queue[1]; p[@5&_u(z
} <n:}kQTT
Zo}y(N1K}
public void remove() { s
(0*
SortUtil.swap(queue,1,size--); 1O!/g
fixDown(1); DEw8*MN
} s%!`kWVJ.
file://fixdown /% I7Vc
private void fixDown(int k) { N~ ?{UOZd
int j; LFZiPu
while ((j = k << 1) <= size) { Hh4 n
if (j < size %26amp;%26amp; queue[j] j++; Ic{F*nnM
if (queue[k]>queue[j]) file://不用交换 xEltwuDd?
break; A+&xMM2Wj
SortUtil.swap(queue,j,k); {66fG53x
k = j;
c\q
} r,]#b[:.s|
} QeDQo
private void fixUp(int k) { ?hR7<02
while (k > 1) { 3-%Cw2ds
int j = k >> 1; P1U*g!
if (queue[j]>queue[k]) Pe_!?:vF
break; /{{UP-
SortUtil.swap(queue,j,k); `Bw9O%]-S
k = j; J j=;
} WA$>pG5s
} `Rdm-[&
CAU0)=M
} 0vGyI>
;oxAe<VIj
} ^Q{Bq
H3H_u4_?SE
SortUtil: /R
LI,.%
XG@`ZJhU6
package org.rut.util.algorithm; J@L9p46,
S|zW^|YU
import org.rut.util.algorithm.support.BubbleSort; Z Dhx5SL&
import org.rut.util.algorithm.support.HeapSort; ;+I/ I9~
import org.rut.util.algorithm.support.ImprovedMergeSort; <N(oDa U
import org.rut.util.algorithm.support.ImprovedQuickSort; Gs*G<P"
import org.rut.util.algorithm.support.InsertSort; 3pXLSdxB
import org.rut.util.algorithm.support.MergeSort; #Ch;0UvFF
import org.rut.util.algorithm.support.QuickSort; 4<X!<]3]
import org.rut.util.algorithm.support.SelectionSort; |3{&@7
import org.rut.util.algorithm.support.ShellSort; \@~UDP]7
zD)pF1,7:8
/** DOQc"+
* @author treeroot !>(RK"KWq]
* @since 2006-2-2 OI0B:()
* @version 1.0 @+Y8*Rj\3
*/ =9G;PVk|
public class SortUtil { J RPSvP\
public final static int INSERT = 1; +y#T?!jQYj
public final static int BUBBLE = 2; O%f8I'u$
public final static int SELECTION = 3; [,~TaP}m
public final static int SHELL = 4; -/D|]qqHm
public final static int QUICK = 5; 46h@j>/K
public final static int IMPROVED_QUICK = 6; *RR[H6B^]X
public final static int MERGE = 7; UkfB^hA
public final static int IMPROVED_MERGE = 8; gr-x|wK
public final static int HEAP = 9; dp5f7>]:(
1P]de'-`j
public static void sort(int[] data) { xAwf49N~
sort(data, IMPROVED_QUICK); .9|uQEL
} >J=<bhR
private static String[] name={ jko"MfJ
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" S)A'Y]2X
}; t/Z:)4Z
X['2b78k
private static Sort[] impl=new Sort[]{ eX2<}'W<
new InsertSort(), IC{F.2D
new BubbleSort(), !RlC~^
-
new SelectionSort(), 5M23/=
N
new ShellSort(), M;Wha;%E"
new QuickSort(), 4Z)DDz-}V
new ImprovedQuickSort(), ACjf\4Q
new MergeSort(), =f:(r'm?r.
new ImprovedMergeSort(), >!9h6BoGV
new HeapSort() OK`Z@X_,bW
}; D22Lu;E
6U,fz#<,}
public static String toString(int algorithm){ d
`j?7Z
return name[algorithm-1]; {5Eyr$
} !U BVPR*
5]7&IDA]]9
public static void sort(int[] data, int algorithm) { '5};M)w
impl[algorithm-1].sort(data); 3D)b*fPc
} .dI)R40L/\
~4)Y#IxL
public static interface Sort { X^< >6|)
public void sort(int[] data); 16@);Ot
} "A]Y~iQ
zfjTQMaxh
public static void swap(int[] data, int i, int j) { (:Cc3
int temp = data; (G4'(6
data = data[j]; $Kq<W{H3ut
data[j] = temp; B;-2$
77
} b
Dg9P^<n
} G^Xd- 7 GQ