[JAVA]用Java实现的各种排序

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0 发表于: 2007-03-15

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。
插入排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;
/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class InsertSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1);
}
}
}

}

冒泡排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class BubbleSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for(int i=0;i for(int j=data.length-1;j>i;j--){
if(data[j] SortUtil.swap(data,j,j-1);
}
}
}
}

}

选择排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class SelectionSort implements SortUtil.Sort {

/*
* (non-Javadoc)
*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for (int i = 0; i < data.length; i++) {
int lowIndex = i;
for (int j = data.length - 1; j > i; j--) {
if (data[j] < data[lowIndex]) {
lowIndex = j;
}
}
SortUtil.swap(data,i,lowIndex);
}
}

}

Shell排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class ShellSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
for(int i=data.length/2;i>2;i/=2){
for(int j=0;j insertSort(data,j,i);
}
}
insertSort(data,0,1);
}

/**
* @param data
* @param j
* @param i
*/
private void insertSort(int[] data, int start, int inc) {
int temp;
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc);
}
}
}

}

快速排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class QuickSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
quickSort(data,0,data.length-1);
}
private void quickSort(int[] data,int i,int j){
int pivotIndex=(i+j)/2;
file://swap
SortUtil.swap(data,pivotIndex,j);

int k=partition(data,i-1,j,data[j]);
SortUtil.swap(data,k,j);
if((k-i)>1) quickSort(data,i,k-1);
if((j-k)>1) quickSort(data,k+1,j);

}
/**
* @param data
* @param i
* @param j
* @return
*/
private int partition(int[] data, int l, int r,int pivot) {
do{
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot);
SortUtil.swap(data,l,r);
}
while(l SortUtil.swap(data,l,r);
return l;
}

}

改进后的快速排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class ImprovedQuickSort implements SortUtil.Sort {

private static int MAX_STACK_SIZE=4096;
private static int THRESHOLD=10;
/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int[] stack=new int[MAX_STACK_SIZE];

int top=-1;
int pivot;
int pivotIndex,l,r;

stack[++top]=0;
stack[++top]=data.length-1;

while(top>0){
int j=stack[top--];
int i=stack[top--];

pivotIndex=(i+j)/2;
pivot=data[pivotIndex];

SortUtil.swap(data,pivotIndex,j);

file://partition
l=i-1;
r=j;
do{
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot));
SortUtil.swap(data,l,r);
}
while(l SortUtil.swap(data,l,r);
SortUtil.swap(data,l,j);

if((l-i)>THRESHOLD){
stack[++top]=i;
stack[++top]=l-1;
}
if((j-l)>THRESHOLD){
stack[++top]=l+1;
stack[++top]=j;
}

}
file://new InsertSort().sort(data);
insertSort(data);
}
/**
* @param data
*/
private void insertSort(int[] data) {
int temp;
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1);
}
}
}

}

归并排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class MergeSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int[] temp=new int[data.length];
mergeSort(data,temp,0,data.length-1);
}

private void mergeSort(int[] data,int[] temp,int l,int r){
int mid=(l+r)/2;
if(l==r) return ;
mergeSort(data,temp,l,mid);
mergeSort(data,temp,mid+1,r);
for(int i=l;i<=r;i++){
temp=data; <T4 7kLI
} A?%XO %
int i1=l; UtHmM,*I
int i2=mid+1; S}XB |
for(int cur=l;cur<=r;cur++){ [M,27
if(i1==mid+1) ~)oWSo5ll
data[cur]=temp[i2++]; f=-!2#%
else if(i2>r) 7M&.UzIY`
data[cur]=temp[i1++]; %FXIlH5
else if(temp[i1] data[cur]=temp[i1++]; _"FbjQ"
else ru(?a~lF8~
data[cur]=temp[i2++]; R(n0!h4
} FcJ.)U
} +3~Gc<OO
$A5B{2
} *IjdN,wox
Q}k_#w
改进后的归并排序: O4'kS @
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package org.rut.util.algorithm.support; "OlI-^y
pU'`9fLi_
import org.rut.util.algorithm.SortUtil; .wt>.mUH
wAj(v6
/** _mI:Lr#dT
* @author treeroot }(vOaD|k=
* @since 2006-2-2 }SJLBy0
* @version 1.0 ,i$(yx?
*/ <W^XSk
public class ImprovedMergeSort implements SortUtil.Sort { hz>yv@1
[h2p8i'o
private static final int THRESHOLD = 10; #7cf 8y
cE_Xo.:Y,
/* xYzcV%-Pm
* (non-Javadoc) eL]w' }\
* "8C(_z+]K`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) D=pI'5&
*/ ^QHMN 7r/
public void sort(int[] data) { Rp4BU"&sU
int[] temp=new int[data.length]; j_YZ(: =
mergeSort(data,temp,0,data.length-1); m%[2x#
} <}x|@u
a\HtxR8L
private void mergeSort(int[] data, int[] temp, int l, int r) { 9O0
int i, j, k; =:R[gdA#1
int mid = (l + r) / 2; *M**h-p2'
if (l == r) RE*S7[ge
return; +XaO?F[c
if ((mid - l) >= THRESHOLD) _QtQPK\+
mergeSort(data, temp, l, mid); 1H2u,{O
else 5GWM )vrZg
insertSort(data, l, mid - l + 1); *7D$;?"
if ((r - mid) > THRESHOLD) :O@,Z_"
mergeSort(data, temp, mid + 1, r); {u[K ^G
else 5IF~]5s
insertSort(data, mid + 1, r - mid); TQxc?o
iTBhLg,
for (i = l; i <= mid; i++) { Ul~}@^m]4}
temp = data; !?>p]0*<
} {TN@KB
for (j = 1; j <= r - mid; j++) { =jd=Qs IL
temp[r - j + 1] = data[j + mid]; V~^6 TS(
} a_fW{;}[
int a = temp[l]; vYm&AD
int b = temp[r]; ?~y(--.t;T
for (i = l, j = r, k = l; k <= r; k++) { a0W\?
if (a < b) { ,8 NEnB
data[k] = temp[i++]; 1R~WY'Ed
a = temp; r#Oz0=0u
} else { r#w_=h)
data[k] = temp[j--]; T|iF/p]F
b = temp[j]; \iE9&3Ie
} Ol5xyj
} :H8L(BsI
} ^E?V+3mV
U$JIF/MO_
/** A-`J!xj#/
* @param data ]SR`96vG
* @param l \B ^sJ[n
* @param i } K-[/;
*/ M4PUJZ]
private void insertSort(int[] data, int start, int len) { Q>c6ouuJ
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); EuA<{%i
} Gv3Fg[MA@c
} [cAg'R6
} (eE}W~Z
} ,ST.pu8N.
]@}BdMlHp
堆排序： ? Z fhz
exKmK!FT
package org.rut.util.algorithm.support; IGV.0l
(SVr>|Db
import org.rut.util.algorithm.SortUtil; O}!@28|3"
myX0<j3G5
/** Hu2g (!
* @author treeroot kU>|E<c*
* @since 2006-2-2 0\^2HjsJ
* @version 1.0 ,T[ +omo
*/ 5kNs@FP
public class HeapSort implements SortUtil.Sort{ BtApl)q#
|CqJ2
/* (non-Javadoc) [mvHa;-w
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }@6 %yR
*/ 7V``f:#d
public void sort(int[] data) { / {~h?P}
MaxHeap h=new MaxHeap(); ^{bEq\5&
h.init(data); fOervo
for(int i=0;i h.remove(); 4x=Y9w0?8
System.arraycopy(h.queue,1,data,0,data.length); <t@*[Aw
} agD.J)v\
=nZd"t'p|
private static class MaxHeap{ 8{t&8Ql n
=6YO!B>7
void init(int[] data){ }"k(kH
this.queue=new int[data.length+1]; [&V%rhi
for(int i=0;i queue[++size]=data; |:[vpJFK
fixUp(size); X;>} ;LiK
} XnOl*#P
} rcT<OiYuig
1R9/AP
private int size=0; >f8,YisH
LdUpVO8)l
private int[] queue; /MtacR
_3[BS9
public int get() { 9%6`ZS~3
return queue[1]; m/Z_HER^
} X\RTHlw']
vn0*KIrX
public void remove() { Ka{Zoi]
SortUtil.swap(queue,1,size--); tYa8I/HpT
fixDown(1); [G/X
} >FNt*tX<0
file://fixdown &N;6G`3
private void fixDown(int k) { |pY0IqO
int j; lsi8?91
while ((j = k << 1) <= size) { Pc1N~?}.
if (j < size %26amp;%26amp; queue[j] j++; UkV] F]
if (queue[k]>queue[j]) file://不用交换 k3XtKPO
break; ;0gpS y$#
SortUtil.swap(queue,j,k); i-b7
k = j; tEs$+b
} %}:J 9vra
} M czWg
private void fixUp(int k) { 'h6RZKG T
while (k > 1) { XQ8Imkc
int j = k >> 1; A>puk2s
if (queue[j]>queue[k]) {5JXg9um
break; jFfki.H
SortUtil.swap(queue,j,k); [4e5(!e
k = j; p2K9R4
} OLwxGRYX
} tS7u#YMh
T\>=o]
} W]OT=6u8o
(Q+3aEUE
} 4KnDXQ%
Zpmy)W]1
SortUtil： 8^lXM-G-
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package org.rut.util.algorithm; *&D=]fG
f/ZE_MN2
import org.rut.util.algorithm.support.BubbleSort; 0"N %Vm
import org.rut.util.algorithm.support.HeapSort; [6|vx},N
import org.rut.util.algorithm.support.ImprovedMergeSort; Qp,l>k
import org.rut.util.algorithm.support.ImprovedQuickSort; b}:Z(L,\
import org.rut.util.algorithm.support.InsertSort; RAC-;~$WB
import org.rut.util.algorithm.support.MergeSort; %}[??R0
import org.rut.util.algorithm.support.QuickSort; *)<tyIHd
import org.rut.util.algorithm.support.SelectionSort; =j0V/=
import org.rut.util.algorithm.support.ShellSort; ZE^de(Fm
zjmc>++<t
/** $H^6I8>
* @author treeroot H &JKja}`
* @since 2006-2-2 KB5{l%>
* @version 1.0 :$j~;)2
*/ FyEl@ }W
public class SortUtil { Z=|@76
public final static int INSERT = 1; 4]bTO
public final static int BUBBLE = 2; PewLg<?,G4
public final static int SELECTION = 3; ( nh!tC
public final static int SHELL = 4; <Yc:,CU
public final static int QUICK = 5; 3jNcL{
public final static int IMPROVED_QUICK = 6; -AX3Rnv^!
public final static int MERGE = 7; #lO;G k{
public final static int IMPROVED_MERGE = 8; }5k"aCno
public final static int HEAP = 9; \&H%k
HIF]c
public static void sort(int[] data) { ,J|};s+
sort(data, IMPROVED_QUICK); *s^5BLI9
} gJ])A7O
private static String[] name={ 0\+Qi?&
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" _W;u Qg']
}; /dfZ>k8
Xk2 75Y
private static Sort[] impl=new Sort[]{ ciTQH (G
new InsertSort(), R/#*~tPi8
new BubbleSort(), DB0xIP~i,?
new SelectionSort(), iB?@(10}ES
new ShellSort(), 4Z_.Jdu w
new QuickSort(), N(9'U0z
new ImprovedQuickSort(), 9hv\%_>o
new MergeSort(), *=v RX!sI,
new ImprovedMergeSort(), R8 m/Nt2
new HeapSort() L4NC-
}; d|TIrlA
cZu:dwE
public static String toString(int algorithm){ 8.,PgS
return name[algorithm-1]; oVu>jO:.
} pQp}HD!-
4Mprc~ 7vr
public static void sort(int[] data, int algorithm) { `drvu?F
impl[algorithm-1].sort(data); -l\@50,D
} dw&Xg_$
j<!$ug9VA
public static interface Sort { gFKQm(0g2
public void sort(int[] data); |9y&;3
} +LUL-d
Xm*Dh#H
public static void swap(int[] data, int i, int j) { ecHy. 7H
int temp = data; <W?,n%
data = data[j]; t`LH\]6@
data[j] = temp; _uBf.Qfs
} +b{\v1b
} ?832#a?FZ;