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。 p/|]])2
插入排序: #?)g? u%g=
eHCLENLmB
package org.rut.util.algorithm.support; A"t~
)
Pa%;[hbn
import org.rut.util.algorithm.SortUtil; &n>\ +Q
/** 0oI3Fb;E
* @author treeroot 1ID0'j$
* @since 2006-2-2 7mipj]
* @version 1.0 X\tE#c&K
*/
NIcPjo
public class InsertSort implements SortUtil.Sort{ [A?Dx-R;(
gWm
-}Nb4
/* (non-Javadoc) X}.y-X#v5J
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) hqW4.|&\c
*/ VP
H
public void sort(int[] data) { 8<UD#i@:C
int temp; l+BJh1^
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); JivkY"= F
} 7e\g
} }W{rDc kv
} 0|g|k7c{rF
(H/JB\~r
} R=g~od[N_
7iCH$}
冒泡排序: ~Zbr7zVn
{&,9Zy]"S
package org.rut.util.algorithm.support; QiB^U^f
H79XP. TtE
import org.rut.util.algorithm.SortUtil; 0 1U/{D6D
.LDK+c
/** cn&\q.!fh
* @author treeroot 0d!1;jy,T
* @since 2006-2-2 lub(chCE[
* @version 1.0 ZS0=xS5q)
*/ DIR_W-z
public class BubbleSort implements SortUtil.Sort{ U4]>8L
[03$*BCq 3
/* (non-Javadoc) 07WZ w1(;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {3@lvoDT
*/ qdoJIP{
public void sort(int[] data) { 7=yC*]BH-=
int temp; ?I{pv4G:
for(int i=0;i for(int j=data.length-1;j>i;j--){ <Cc}MDM604
if(data[j] SortUtil.swap(data,j,j-1); >Q&E4j C
} P6,~0v(S
} &{${ Fq
} e;KZTH;
} `6:;*#jO,
%/KN-*
} }t!,{ZryE1
P$z8TDCH
选择排序: dIiQ^M
$
2'AY
package org.rut.util.algorithm.support; Qhlgu!
R*~<?}Rr
import org.rut.util.algorithm.SortUtil; u4QPO:,a4
~~eR,HYk
/** '^f,H1oW
* @author treeroot k$`~,LJ p
* @since 2006-2-2 =fmM=@!$<
* @version 1.0 jUjgxP*7m
*/ 4%wP}Zj#
public class SelectionSort implements SortUtil.Sort { n(^{s5 Rr
IV$pA`|V
/* \sB
a
* (non-Javadoc) $_s"16s
* 4$Oakl*l
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) `I+G7KK
*/ 7FL!([S5i
public void sort(int[] data) { (S/f!Dk&3
int temp; ^CZ!rOSv
for (int i = 0; i < data.length; i++) { IQ_2(8Kv
int lowIndex = i;
}C1&}hZ
for (int j = data.length - 1; j > i; j--) { hES_JbX}]
if (data[j] < data[lowIndex]) { ssbvuTr
lowIndex = j; LGx]z.30B
} 4DY\QvW5
} ((i%h^tGa;
SortUtil.swap(data,i,lowIndex); hKP7p
} w?^qAj(*d
} pyA;%vJn
4%L`~J4 wr
} *^R?*vNs
o*OYZ/_L
Shell排序: XOsPKq
` #Qlr+X
package org.rut.util.algorithm.support; !#0Lo->OO
d?dZ=]~C
import org.rut.util.algorithm.SortUtil; 7J@iJW],,
A&%vog]O
/** ">='l9
* @author treeroot h}PeXnRU
* @since 2006-2-2 )cnH %6X
* @version 1.0 Fd@n#DR `
*/ pR6mSfer
public class ShellSort implements SortUtil.Sort{ e1$T%?(&[
V8`o71p
/* (non-Javadoc) R5M/Ho 4
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) _;baZ-
*/ x6Q,$B
public void sort(int[] data) { G9'Wo.$ t
for(int i=data.length/2;i>2;i/=2){ y[M<x5
for(int j=0;j insertSort(data,j,i); ziUEA>m*/
} ktlI(#\%
} d:08@~#
insertSort(data,0,1); N!R>L{H>
} R42+^'af
1?:/8l%V
/** T,z7U2O
* @param data uE {r09^q\
* @param j !S6zC >
* @param i \09m
?;^
*/ BYj Eo
private void insertSort(int[] data, int start, int inc) { HRX}r$
int temp; quXL'g
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); #.1+-^TQk
}
bT(}=j
} H@ab]&
} *F:f\9
#0OW0:Q
} fpd4 v|(
Mn`);[
快速排序: hnOo T? V
9j'(T:Zs
package org.rut.util.algorithm.support; bH6i1c8
6"@`iY
import org.rut.util.algorithm.SortUtil; ,x (?7ZW>
p./9^S
/** jU~q~e7Te
* @author treeroot d v8q&_
* @since 2006-2-2 <L!9as]w
* @version 1.0 -jXO9Q
*/ Mk-zeq<2z
public class QuickSort implements SortUtil.Sort{ EA#{N<
|aD8
/* (non-Javadoc) "pRi1Y5)l
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) SM?rss.=
*/ wk+| }s
public void sort(int[] data) { Qs\m"yx
quickSort(data,0,data.length-1); (FVHtZi7
} E\/J& .
private void quickSort(int[] data,int i,int j){ K9\r2w'T'
int pivotIndex=(i+j)/2; 7+'&(^c
file://swap l% \p
SortUtil.swap(data,pivotIndex,j); zG^|W8um_
h#:_GNuF
int k=partition(data,i-1,j,data[j]); rt8"U<~
SortUtil.swap(data,k,j); AHB_[i'>7
if((k-i)>1) quickSort(data,i,k-1); ~DJI Lc
if((j-k)>1) quickSort(data,k+1,j); n{*A<-vL
/#Fz
K
} xj<
K6
/** i]$/& /
* @param data td!YwN*
* @param i v#^ _|
* @param j kac-@
* @return FE=vUQXE2
*/ &P pb2
private int partition(int[] data, int l, int r,int pivot) { F2)\%HR
do{ 52P^0<Wq
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); 9O4\DRe5c
SortUtil.swap(data,l,r); +~n"@ /
} n_9Wrx328
while(l SortUtil.swap(data,l,r); nvInq2T1
return l; )u?^w
} Ewq7oq5:
N2uTWT>
} E0t%]?1
0Qr|!B:+9)
改进后的快速排序:
[1Q:
{>h,@
package org.rut.util.algorithm.support; O5v~wLx9e
Yu+;vjbK-
import org.rut.util.algorithm.SortUtil; 6^QSV@N|
_m@+d>f_
/** W<\*5oB%H
* @author treeroot dTVh{~/
* @since 2006-2-2 ' JAcN@q~z
* @version 1.0 R+<M"LriR&
*/ {fxytiH8
public class ImprovedQuickSort implements SortUtil.Sort { cnL@j_mb
zlhU[J}"1|
private static int MAX_STACK_SIZE=4096; _edT+r>+
private static int THRESHOLD=10; S<o\.&J
/* (non-Javadoc) 7J|eL
yj
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 7e/K YS+!s
*/ Gj- *D7X5
public void sort(int[] data) { rodr@
int[] stack=new int[MAX_STACK_SIZE]; :pNu$%q
t-Zk)*d/0
int top=-1; BDcA_=^R&
int pivot; P"s7}cl
int pivotIndex,l,r; *kq>Z 06'i
+GlG.6
stack[++top]=0; Ey]P
>J
stack[++top]=data.length-1; qlg?'l$03)
%Hpz^<`
while(top>0){ FQBAt0
int j=stack[top--]; AkX8v66:
int i=stack[top--]; x}7` Q:k=
*3h!&.zm
pivotIndex=(i+j)/2; tW \q;_DSr
pivot=data[pivotIndex]; ZJ'FZ8Sx
_8s1Wh G
SortUtil.swap(data,pivotIndex,j); $@eFSA5k,7
6B&ERdoX
file://partition G0Wv=tX|
l=i-1; %R-KkK<S
r=j; A08{]E#v>
do{ 4^{~MgQWK+
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); #RTiWD[o
SortUtil.swap(data,l,r); (k<__W c_t
} vx4Jk]h+=L
while(l SortUtil.swap(data,l,r); q":0\ar&QT
SortUtil.swap(data,l,j); <lf6gb
. *c%A^>
if((l-i)>THRESHOLD){ }x+s5a;!3/
stack[++top]=i; _-nIy*', =
stack[++top]=l-1; $|H7fn(r
} V"W)u#4,
if((j-l)>THRESHOLD){ 7gP8K`w?[
stack[++top]=l+1; $#7 ~
stack[++top]=j; M|\C@,F]8
} ['\u?m
|emZZj
} 8\9s,W:5
file://new InsertSort().sort(data); Nh+ZSV4WJ:
insertSort(data); zH1:kko
} I;3Uzv
/** U
Y')|2y
5
* @param data ?%wM 8?
*/ WG(%Pkowv
private void insertSort(int[] data) { 6),VN>j
int temp; }@NT#hD
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); (g#,AX
} <|c[
#f
} _%6Vcy
} WJ
m:?,
EP}NT)z,{
} G8Sx;Xi
n;0x\Q|S
归并排序: e=w.7DSE
?R\:6x<
package org.rut.util.algorithm.support; u<a =TPAU
*u?N{LkqS
import org.rut.util.algorithm.SortUtil; (H-Y-Lk+
.m
\y6
/** ,?ci+M)
* @author treeroot QP0[
* @since 2006-2-2 b.sRB1
* @version 1.0 6<+ 8[o
*/ 7(<z= F
public class MergeSort implements SortUtil.Sort{ Mg}8 3kS
(v$$`zh
/* (non-Javadoc) v|K<3@J
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) kG70j{gf
*/ -|&5aH]
public void sort(int[] data) { _/%,ZoZ2
int[] temp=new int[data.length]; O]N
8QH
mergeSort(data,temp,0,data.length-1); kEpCF:@A
} GUqhm$6a
Bq) aA)gF
private void mergeSort(int[] data,int[] temp,int l,int r){ T{Rhn V1
int mid=(l+r)/2; #I|jFn9
if(l==r) return ; b+3QqbJ[F
mergeSort(data,temp,l,mid); I]OVzM
mergeSort(data,temp,mid+1,r); UJ8V%0
for(int i=l;i<=r;i++){
oiY&O]}
temp=data; E^<.;
} \4r?=5v*
int i1=l; @Nk]f
int i2=mid+1; #pm0T1+jW
for(int cur=l;cur<=r;cur++){ FZW:dsm
if(i1==mid+1) Lp}>WCams
data[cur]=temp[i2++]; T($6L7 j9
else if(i2>r) N&'05uWY}
data[cur]=temp[i1++]; bcCCvV}6WZ
else if(temp[i1] data[cur]=temp[i1++]; H^\2,x Z
else b3RCsIz
data[cur]=temp[i2++]; Z UCz-53
} 0zvA>4cq)
} "Ooc;xD3<
(aa}0r5
} P-c<[DSM'I
3~&h9#7Ke
改进后的归并排序: :4,
OA
qe\JO'g#e
package org.rut.util.algorithm.support; hB:}0@l6p=
y8QJ=v* B
import org.rut.util.algorithm.SortUtil; n'-?CMH`
=TzmhX5
/** |KQkmc
* @author treeroot 4Ev#`i3~
* @since 2006-2-2 /5Zt4&r
* @version 1.0 K@UQ O
*/ _~_E(rTn
public class ImprovedMergeSort implements SortUtil.Sort { ejuw+@ _
}co*%F{1
private static final int THRESHOLD = 10; ^&mJDRe
'3MCb
/* *>,CG:`D
* (non-Javadoc)
")cJA f
* cLpkgK&a
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) klKd !
*/ 9gLUM$Kd
public void sort(int[] data) { }&{z-/;H
int[] temp=new int[data.length]; `0qBuE_^h
mergeSort(data,temp,0,data.length-1); rL=_z^.P
} ">pt,QV
}wh
sZ
private void mergeSort(int[] data, int[] temp, int l, int r) { &S8Pnb)d
int i, j, k; ief~*:5
int mid = (l + r) / 2; 8 FqhSzw
if (l == r) ;HOOo>%_K
return; 8.'[>VzBL
if ((mid - l) >= THRESHOLD) ?pAO?5Z:}
mergeSort(data, temp, l, mid); lW!}OzE(m
else nbGB84
insertSort(data, l, mid - l + 1); qf7oG0
if ((r - mid) > THRESHOLD) L`M.Htm8
mergeSort(data, temp, mid + 1, r);
69o,T`B
else >O:31Uk
insertSort(data, mid + 1, r - mid); wLDWD,"K
EM.7,;|N
for (i = l; i <= mid; i++) { [=
GVK
temp = data; I,:R~^qJ8v
} #00k7y>OyD
for (j = 1; j <= r - mid; j++) { &3nbmkM
temp[r - j + 1] = data[j + mid]; 45u\v2,C3
} z`^DQ8+\j
int a = temp[l]; ZDI%?.U
int b = temp[r]; Ev R6^n/
for (i = l, j = r, k = l; k <= r; k++) { *,UD&N_)*6
if (a < b) { NiCH$+c\
data[k] = temp[i++]; ^zMME*G
a = temp; ,.cNs5[t
} else { qJQ!e
data[k] = temp[j--]; G9/5KW}-
b = temp[j]; mv,<#<-W
} B4<W%lm
} RO([R=.`/
} TH`zp]0
7.r}98V
/** !F|mCEU
* @param data q]-CTx$
* @param l M%3 \]&
* @param i abHW[VP9
*/ u]B15mT?
private void insertSort(int[] data, int start, int len) {
jWg7RuN
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 6%p$C
oR
} n>_EEw2/
} V>{G$(v$
} wX0m8"g@
} =*icCng
&nc0stuL
堆排序: MpV3.
,+u.FQv~
package org.rut.util.algorithm.support; DA/l`Pn
]8}+%P,Q
import org.rut.util.algorithm.SortUtil; J H%^FF2
[|=#~(yYQ
/** ,s%1#cbR
* @author treeroot e~#"#?
* @since 2006-2-2 pT90TcI2
* @version 1.0 xm)s%"6n
*/ 1N`1~y
public class HeapSort implements SortUtil.Sort{ Wz}8O]#/.
];-DqK'
/* (non-Javadoc) qfO=_z ES
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ^1a/)Be{_
*/ PY4RwN
public void sort(int[] data) { RGeM.
MaxHeap h=new MaxHeap(); 23lLoyN
h.init(data); J3]W2m2Zw
for(int i=0;i h.remove(); 5}4f[
System.arraycopy(h.queue,1,data,0,data.length); W>ziA
} {*=+g>RgD
UBmD
3|Zo
private static class MaxHeap{ re\@v8w~
LqH<HGMFD
void init(int[] data){ 2k
}:)]m
this.queue=new int[data.length+1]; ?e`4
sf_~
for(int i=0;i queue[++size]=data; KuU]enC3
fixUp(size); (RDY-~#~
} E&\dr;{7
} Bs@!S?
Zu4|1W
private int size=0; I9! eL4e
;XJK*QDN
private int[] queue; /Hox]r]'e
tQSj[Yl
public int get() { O'6zV"<P
return queue[1]; xiu?BP?V
} 7x/S4Gs'4
nkKiYr
public void remove() { AL%gqt]
SortUtil.swap(queue,1,size--); ugtzF
fixDown(1); `EV"
/&`
} ]=s!cfu
file://fixdown [DW}z
private void fixDown(int k) { qf/1a CQiP
int j; T
;Ga G
while ((j = k << 1) <= size) { hK!Z~
if (j < size %26amp;%26amp; queue[j] j++; 5yvaY
"B
if (queue[k]>queue[j]) file://不用交换 %X)i-^T
break; "2>I?
SortUtil.swap(queue,j,k); <@BzF0
k = j; :ZP4(}
} 81\$X
} ep"YGx[V
private void fixUp(int k) { +%Vbz7+!
while (k > 1) { zeqP:goy
int j = k >> 1; u9WQ0.
if (queue[j]>queue[k]) E$$pO.\
break; kzA%.bP|
SortUtil.swap(queue,j,k); +]n.uA-`[a
k = j; &*G+-cF
} 89I[Dg;"u
} 2b+0}u>a
Nhh2P4gH
} oo{5:
F^5<o
} :!omog
_9Pxtf
SortUtil: aBPaC=g{HO
Vb|;@*=R&Q
package org.rut.util.algorithm; tK<GU.+
V\ud4
import org.rut.util.algorithm.support.BubbleSort; q!iMc
import org.rut.util.algorithm.support.HeapSort; Qm|Q0u
import org.rut.util.algorithm.support.ImprovedMergeSort; ;().
import org.rut.util.algorithm.support.ImprovedQuickSort; fvajNP
import org.rut.util.algorithm.support.InsertSort; :Zy7h7P,lT
import org.rut.util.algorithm.support.MergeSort; UcCkn7}
import org.rut.util.algorithm.support.QuickSort; 1vcI`8%S+u
import org.rut.util.algorithm.support.SelectionSort; \`w!v,aM$
import org.rut.util.algorithm.support.ShellSort; B/IPG~aMEZ
lO/<xSjNd
/** ={9G.%W
* @author treeroot K)2ZH@
* @since 2006-2-2 <B]\&
* @version 1.0 |Rr^K5hmD
*/ @`:n +r5u
public class SortUtil { Rn O%8Hk
public final static int INSERT = 1; gf]biE"k
public final static int BUBBLE = 2; |>(@n{
public final static int SELECTION = 3; <!.'"*2
public final static int SHELL = 4; iST r;>A
public final static int QUICK = 5; 0G/VbS
public final static int IMPROVED_QUICK = 6; #C?T
public final static int MERGE = 7; P5;LM9W
public final static int IMPROVED_MERGE = 8; Cc:4n1|]>
public final static int HEAP = 9; QMI&?Q:=
W4yNET%l,
public static void sort(int[] data) { T`g.K6$b
sort(data, IMPROVED_QUICK); /#Y)nyE
} _A*5BAB:h(
private static String[] name={ ~mc7O
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" z`-?5-a]I
}; 4!Ez#\
\Q"o\:IoIT
private static Sort[] impl=new Sort[]{ \14"B gj1
new InsertSort(), N> RabD
new BubbleSort(), i^ 9PiP|U
new SelectionSort(), 8tWOVLquJ
new ShellSort(), *F+t`<2
new QuickSort(), 66<3zadJZU
new ImprovedQuickSort(), %iWup:
new MergeSort(), RQI? \?o
new ImprovedMergeSort(), @psyO]D=j%
new HeapSort() R}F0_.
}; 0bxB@(NO
3X$)cZQ
public static String toString(int algorithm){ .$+]N[-=
return name[algorithm-1]; ZCi~4&Z#
} 8~?3: IZ
yc5C`r +6
public static void sort(int[] data, int algorithm) { "Mgx5d
impl[algorithm-1].sort(data); :mLcb.E
} C=ni5R
)/H=m7}1h
public static interface Sort { mLU4R Q}5
public void sort(int[] data); @cPb*
} f3e#.jan
((A]FOIbO
public static void swap(int[] data, int i, int j) { 8YC\Bw
int temp = data; >ir'v5
data = data[j]; M:|Z3p K
data[j] = temp; H8~<;6W
} J#B%
#X
} {S(d5o8