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。 QbdXt%gZe
插入排序: $j- Fm:ZIA
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package org.rut.util.algorithm.support; 0eO!,/
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import org.rut.util.algorithm.SortUtil; n~0wq(8M
/** />xEpR3_A
* @author treeroot a@? $#>
* @since 2006-2-2 F.TIdkvp
* @version 1.0 8fQ~UcT$
*/ S*Ea" vBA
public class InsertSort implements SortUtil.Sort{ 2[B bdg[O
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/* (non-Javadoc) `)O9
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* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) `6rLd>=R
*/ 0/~p1SSun
public void sort(int[] data) { [
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int temp; Y's=31G@
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); TY]0aw2]|7
} <x`yoVPiZg
} E:rJi]
} S[y'{;
m !:F/?B
} (lwV(M
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冒泡排序: b#7nt ?`7p
O[Z$~
package org.rut.util.algorithm.support; 1<9d[N*
ky !ZJR
import org.rut.util.algorithm.SortUtil; 5JOfJ$(n
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/** ,U9j7E<4
* @author treeroot %#%YU|4R
* @since 2006-2-2 ,8*A#cT
B
* @version 1.0 <w&'E6mU
*/ t_^cqEr
public class BubbleSort implements SortUtil.Sort{ fPJc
di_N}x*
/* (non-Javadoc) @%g:'^/
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) _Nh])p-
*/ oxFd@WV5
public void sort(int[] data) { ~/4j&IG
int temp; ~JZLWTEe
for(int i=0;i for(int j=data.length-1;j>i;j--){ J*g<]P&p0
if(data[j] SortUtil.swap(data,j,j-1); O#tmB?n*
} tln}jpCw
} y2%[/L:u~
} em'3 8L|(
} Q-,
4
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} W[QgddR
tQj=m_
选择排序: [GyPwb-
v2|zIZ
package org.rut.util.algorithm.support; 1q'_J?Xmd
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import org.rut.util.algorithm.SortUtil; VIWH~UR)&!
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/** r(]Gd`]
* @author treeroot U;&s=M0[
* @since 2006-2-2 ;Qd'G7+
* @version 1.0 :qXREF@h
*/ /_<_X
7
public class SelectionSort implements SortUtil.Sort { "% \y$
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/* d;%~\+)x4
* (non-Javadoc) (|W6p%(
* GLY,<O>D5
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Gyu =}
*/ L_Z`UhD3{
public void sort(int[] data) { 3Mh_&%!O
int temp; o)\EfPT
for (int i = 0; i < data.length; i++) { [e=k<gKH
int lowIndex = i; &hpznIN
for (int j = data.length - 1; j > i; j--) { D6_#r=08
if (data[j] < data[lowIndex]) { Jv2V@6a(
lowIndex = j; 0Q%I[f8
} eJOo~HIWQ
} uF,%N
SortUtil.swap(data,i,lowIndex); t2ui9:g4j
} Pw|/PfG
} Qm3RXO
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} o)
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Shell排序: cCtd\/ \
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package org.rut.util.algorithm.support; IL8&MA%
w4y???90)
import org.rut.util.algorithm.SortUtil; 4>=Y@z
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/** aLevml2:T
* @author treeroot c1%ki%J#
* @since 2006-2-2 VjSbx'i
* @version 1.0 d#,
*/ /4BYH?*
public class ShellSort implements SortUtil.Sort{ %'F[(VB
Se/]J<]
/* (non-Javadoc) !Je!;mEvI
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) M>Ws}Y
*/ xs
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public void sort(int[] data) { h" YA>_1
for(int i=data.length/2;i>2;i/=2){ h7\EN
for(int j=0;j insertSort(data,j,i); ELV$!f|u
} LrfyH"#!:
} o AS 'Z|
insertSort(data,0,1); tIX|oWC$q
} /i~n**HeF?
+fF4]WFP
/** h8SK8sK<
* @param data cMt
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* @param j .9bP8u2B{
* @param i l$p"%5]_
*/ Cvs4dd%)i
private void insertSort(int[] data, int start, int inc) { ;S>ml
int temp; f#vVk
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); N'5!4JUI
} M\9p-%"L
} {u7_<G7
} ]\R%@FCYc
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} T8QRO%t
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快速排序: Y6%O 9b
gJn_8\,C>Q
package org.rut.util.algorithm.support; c;7ekj
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import org.rut.util.algorithm.SortUtil; I'uRXvEr7
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/** 5E|/n(
* @author treeroot T;I>5aQ:q4
* @since 2006-2-2 +Y^/0=6h
* @version 1.0 eYjr/`>O
*/ R75np^
public class QuickSort implements SortUtil.Sort{ Yg7C"3;Vt
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/* (non-Javadoc) *j=
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* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2:S
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*/ ;-sF%c
public void sort(int[] data) { ~|)'vK8W
quickSort(data,0,data.length-1); 93N:?B9
} szb],)|18
private void quickSort(int[] data,int i,int j){ yX8$LOjE
int pivotIndex=(i+j)/2; 5SY( :!
file://swap VJ(#FA2
SortUtil.swap(data,pivotIndex,j); w+owx(mN@
#PRkqg+|
int k=partition(data,i-1,j,data[j]); U,u\o@3A
SortUtil.swap(data,k,j); *XlnEHv
if((k-i)>1) quickSort(data,i,k-1); wg,w;Gle
if((j-k)>1) quickSort(data,k+1,j); q>ps99[=
-i?-Xj#%
} |q\:3R_0
/** S(*SUH
* @param data )b AcU
* @param i Hlq#X:DCn
* @param j o;@T6-VH
* @return f~? MNJ2
*/ 4h~o>(Sq
private int partition(int[] data, int l, int r,int pivot) { .qBf`T;
do{ m;nT ?kv
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); `H6kC$^Ofx
SortUtil.swap(data,l,r); vJfex,#lv
} t1YVE%`w
while(l SortUtil.swap(data,l,r); /g!', r,
return l; qMe$Qr8
} 9rmOf Jo:
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} $/Q*@4t
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改进后的快速排序:
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package org.rut.util.algorithm.support; H?>R#Ds-
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import org.rut.util.algorithm.SortUtil; w+~s}ta2^
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/** .pOTIRbA
* @author treeroot AA
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* @since 2006-2-2 Rx 4
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* @version 1.0 .5zqpm
*/ Og`w ~!\
public class ImprovedQuickSort implements SortUtil.Sort { =)3tVH&
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private static int MAX_STACK_SIZE=4096; QuJ)WaJkC
private static int THRESHOLD=10; N?h=Zl|
/* (non-Javadoc) 1^zpO~@S
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Vn6 g(:\w
*/ j9YI6X"
public void sort(int[] data) { gG^K\+S
int[] stack=new int[MAX_STACK_SIZE]; G_~w0r#
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int top=-1; x%JtI'sg
int pivot; T0ebW
w
int pivotIndex,l,r; (P[:g
h+!Ld^'c
stack[++top]=0; :YU_ \EV
stack[++top]=data.length-1; N (W;(7
[s4lSGh
while(top>0){ w"O^CR)
int j=stack[top--]; /bj
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int i=stack[top--]; K
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SAt{At
pivotIndex=(i+j)/2; fKMbOqU_
pivot=data[pivotIndex]; ?j{LE-(
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SortUtil.swap(data,pivotIndex,j); shOQ/
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>\QCD9
file://partition eEIa=MB*
l=i-1; d3AOuVUf
r=j; brGUK PB
do{ ([='LyH];z
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); jd|? aK;(
SortUtil.swap(data,l,r); 0S0 ?\r
} I_IDrS)O
while(l SortUtil.swap(data,l,r); 9GuG"^08
SortUtil.swap(data,l,j); hGx)X64Mw
Lc!%
3,#.
if((l-i)>THRESHOLD){ |>(;gr/5(
stack[++top]=i; jX79Nm|
stack[++top]=l-1; PYYOC"$
} S$Tc\/{
if((j-l)>THRESHOLD){ ,25Qhz]
stack[++top]=l+1; T<"Hh.h
stack[++top]=j; C{<qc,!4
} [ 44d(P'
-aPvls
} `g&<7~\=A
file://new InsertSort().sort(data); WhsTKy&E
insertSort(data); q/[)Z
@&(
} 0 V:z(r
/** oO-kO!59y
* @param data "k(Ee
*/ n5X0Gi9
private void insertSort(int[] data) { xioL6^(Qk,
int temp; K)c`G_%G
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); UUGwXq96i
} sXdNlR&
} 't:|>;Wx
} ][1*.7-
SyFOf
} g<VJ4TE6R
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归并排序: )>$@cH
<o8j+G)K#
package org.rut.util.algorithm.support; IPK.
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import org.rut.util.algorithm.SortUtil; @bQf =N+
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/** %]Gm
* @author treeroot wiXdb[[#
* @since 2006-2-2 *P,dR]-m
* @version 1.0 pZx'%-\-T
*/ $bRakF1'S
public class MergeSort implements SortUtil.Sort{ ?+)O4?#
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/* (non-Javadoc) fJ_d,4
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;ZMm6o
*/ s+;J`_M
public void sort(int[] data) { l(Dkmt>^
int[] temp=new int[data.length]; a%a_sR\)
mergeSort(data,temp,0,data.length-1); _,Wb`P
} =Jd('r
3A'vq2beM
private void mergeSort(int[] data,int[] temp,int l,int r){ s*.CJ
int mid=(l+r)/2; XS5*=hv:
if(l==r) return ; G:NI+E"]
mergeSort(data,temp,l,mid); bLyU;
mergeSort(data,temp,mid+1,r); m?I$XAE
for(int i=l;i<=r;i++){ i#o:V/Z.
temp=data; zrWkz3FN
} iO)FZ%?"
int i1=l; 4vi P lO
int i2=mid+1; dGU io?
for(int cur=l;cur<=r;cur++){ RM8p[lfX
if(i1==mid+1) 'xi[- -
data[cur]=temp[i2++]; ;Ll/rJ:*
else if(i2>r) G j^J pG
data[cur]=temp[i1++]; `,XCD-R^
else if(temp[i1] data[cur]=temp[i1++]; \^O#)&5 V
else WVUa:_5{
data[cur]=temp[i2++]; c+:LDc3!Gb
} m%Ah]x;
} AsyJDt'i
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} +.gM"JV
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改进后的归并排序: )&R^J;W$M1
CPssk,q~C
package org.rut.util.algorithm.support; \~|+*^e)
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import org.rut.util.algorithm.SortUtil; q 65mR!)
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/** \ 8v{9Yb
* @author treeroot &VG|*&M
* @since 2006-2-2 *"4d6
* @version 1.0 dLb9p"EE#
*/ \mRRx#-r%
public class ImprovedMergeSort implements SortUtil.Sort { Y0`@$d&n
nA:\G":\y
private static final int THRESHOLD = 10; GRV#f06
T=6fZ;7
/* =\;yxl
* (non-Javadoc) $89hkUuTu^
* zs!}P
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) am>X7
*/ EugQr<sM#
public void sort(int[] data) { ~^#F5w"
int[] temp=new int[data.length]; /5 rWcX
mergeSort(data,temp,0,data.length-1); tmM8YN|
} gd~# uR\
> <cK
private void mergeSort(int[] data, int[] temp, int l, int r) { ATq)8Rm\
int i, j, k; hs'J'~a
int mid = (l + r) / 2; wfr+-
if (l == r) g wM~W
return; ,})x1y
if ((mid - l) >= THRESHOLD) "Uy==~
mergeSort(data, temp, l, mid); HZ$q`e
else &w@~@]
insertSort(data, l, mid - l + 1); fAMJFHW
if ((r - mid) > THRESHOLD) e_3KNQ`kA
mergeSort(data, temp, mid + 1, r); L@> +iZSO
else H]v"_!(\
insertSort(data, mid + 1, r - mid); (ATvH_Z
Y@WCp
for (i = l; i <= mid; i++) { ?U~}uG^
temp = data; q}Wd`>VDR
} QIl![%
for (j = 1; j <= r - mid; j++) { 2p3ep,
temp[r - j + 1] = data[j + mid]; " jefB6k9h
} -cW`qWbd
int a = temp[l]; xs jJ8>G
int b = temp[r]; .O9A[s<
for (i = l, j = r, k = l; k <= r; k++) { 2K/+6t}
if (a < b) { pyPS5vWG
data[k] = temp[i++]; Of|e]GR
a = temp; = ~{n-rMF
} else { Sb_T _m
data[k] = temp[j--]; a|B^%
b = temp[j]; XRU^7@Ylks
} 9d ZE#l!Q
} slSQ \;CDA
} AEx|<E0
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/** xgl~4
* @param data eM)E3~K:2
* @param l NXhQdf
* @param i W`zY\]
*/ :/e=J
private void insertSort(int[] data, int start, int len) { ). +!/x
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); cp|&&q
} ![O@{/
} IEb"tsel
} K*&?+_v
:
} ]V9z)uz
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堆排序: RfPRCIo
I"*;fdm
package org.rut.util.algorithm.support; }@Mx@ S
0>D:
import org.rut.util.algorithm.SortUtil; D8+68_BEM
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/** i*16kdI.
* @author treeroot 6`LC(Nv%-n
* @since 2006-2-2 C9oF*{
* @version 1.0 |JVeW[C
*/ !oXA^7Th6]
public class HeapSort implements SortUtil.Sort{ #UN(R
U'iL|JRF
/* (non-Javadoc)
.*H0{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ^/+0L[R
*/ 7h?yAgDv~
public void sort(int[] data) { r.e,!B s
MaxHeap h=new MaxHeap(); ,z}wR::%
h.init(data); o6e6Jw
for(int i=0;i h.remove(); Q>gU(
System.arraycopy(h.queue,1,data,0,data.length); B"O5P>
} FrSeR9b
[ e4)"A"
private static class MaxHeap{ !x9j~D'C`
9g"
1WZ!
void init(int[] data){ &dSw[C#f
this.queue=new int[data.length+1]; @Yua%n6]#D
for(int i=0;i queue[++size]=data; HLMEB0zh^
fixUp(size); c`UJI$Q/
} 1XZ|}Xz
} ]Y[8|HJ8
b@J&jE~d
private int size=0; rQNT
m,nV,}@J
private int[] queue; )=\W
sQ
UXB[3SP
public int get() { SU, t,i
return queue[1]; 5G8`zy
} LkFXUt ?
kP%Hg/f/Ot
public void remove() { Xq&x<td
SortUtil.swap(queue,1,size--); HF-Msu6
fixDown(1); t`{^gt
} sV7dgvVd
file://fixdown lj"L Q(^
private void fixDown(int k) { P=&J e?
int j; *VT@
while ((j = k << 1) <= size) { "m]"%MU78
if (j < size %26amp;%26amp; queue[j] j++; WG
9f>kE
if (queue[k]>queue[j]) file://不用交换 to Ei4u)m
break; (^g?/i1@d
SortUtil.swap(queue,j,k); !x. ^ya
k = j; &?3?8Q\
} _C?<re3*
} R<mLG $
private void fixUp(int k) { |dNtM ^
while (k > 1) { ZNPzQ:I@
int j = k >> 1; /2oTqEqaV
if (queue[j]>queue[k]) vCwDE~
break; ?,r bD1
SortUtil.swap(queue,j,k); "fLGXbNQ
k = j; [d!C6FT
} @18@[ :d"
} xM%E;
{xt<`_R
} yy?|q0
]
K7>R0
} ?Gl'-tV
I=hgfo
SortUtil: 6<H[1PI`,G
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package org.rut.util.algorithm; @6GM)N\{[
7|6tH@4Ub
import org.rut.util.algorithm.support.BubbleSort; uqZLlP#
import org.rut.util.algorithm.support.HeapSort; bl\44VK2'
import org.rut.util.algorithm.support.ImprovedMergeSort; $X5~9s1Wl
import org.rut.util.algorithm.support.ImprovedQuickSort; 8aGZ% UI
import org.rut.util.algorithm.support.InsertSort; MAR
kTxzi
import org.rut.util.algorithm.support.MergeSort; l1c&a[M)
import org.rut.util.algorithm.support.QuickSort; C5Q|3d
import org.rut.util.algorithm.support.SelectionSort; #I@]8U#,":
import org.rut.util.algorithm.support.ShellSort; ( ~pcPGUG
8{Y
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/** (?R
* @author treeroot ~U8#Iq1
* @since 2006-2-2 ;-=y}DK
* @version 1.0 nvD"_.K rJ
*/ 1L'[DKb'
public class SortUtil { ^Gv<Xl
public final static int INSERT = 1; sVkR7
^KsG
public final static int BUBBLE = 2; XrC{{K
public final static int SELECTION = 3; {R8Q`2R
public final static int SHELL = 4; Wnl8XHPn
public final static int QUICK = 5; !5`}s9hsF_
public final static int IMPROVED_QUICK = 6; h.
i&[RnX
public final static int MERGE = 7; LH4-b-
public final static int IMPROVED_MERGE = 8; L5yxaF{]
public final static int HEAP = 9; QAi(uL5
Yx&cnDx
public static void sort(int[] data) { J+\F)k>r
sort(data, IMPROVED_QUICK); ,@='.Qs4g
} 8<P $E!
private static String[] name={ 2x e_Q70II
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" kVU|k-?2
}; OJ UM Y<5
=&"Vf!7YR7
private static Sort[] impl=new Sort[]{ D0i84I`Z%
new InsertSort(), :G^`LyOM
new BubbleSort(), ENC_#-1x
new SelectionSort(), =(v!pEF
new ShellSort(), SX^fh.
new QuickSort(), 94APjqV6'
new ImprovedQuickSort(), w^|,[G^}H
new MergeSort(), X3L9j(
new ImprovedMergeSort(), w#F+rh3
new HeapSort() j)-D.bY0
}; ZX-9BJ`Q
jT::o
public static String toString(int algorithm){ (6+6]`c$
return name[algorithm-1]; 8fM}UZI
} }C*o;'o5G
K-
}k-S
public static void sort(int[] data, int algorithm) { `r*6P^P
impl[algorithm-1].sort(data); q'(WIv@
} !+uMH!
'dWJ#9C
public static interface Sort { phXVuQ
public void sort(int[] data); ZX'{o9+w5
} h| UT/:
IU$bP#<
public static void swap(int[] data, int i, int j) { {'DP/]nK
int temp = data; +"3eh1q[
data = data[j]; -&)^|Atm
data[j] = temp; I J4"X#Q/
} lR.a3.~
} ynOp7ZN$