[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; q.km>XRk~
} wJ*-K-
int i1=l; 1[9j`~[([
int i2=mid+1; CT%m_lN
for(int cur=l;cur<=r;cur++){ [:@?,?V\N
if(i1==mid+1) $IZZ`Z]B
data[cur]=temp[i2++]; 6 <S&~q
else if(i2>r) [;YBX]t
data[cur]=temp[i1++]; >I~z7JS
else if(temp[i1] data[cur]=temp[i1++]; G$uOk?R#5c
else }px]
data[cur]=temp[i2++]; Kg-X]yu*0
} i9U_r._qj;
} l0xFt ~l
>ImM~SR)
} 1t=X: ]0j
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改进后的归并排序: ,GP4I3D
1?#9Kj{ql
package org.rut.util.algorithm.support; -8 =u{n
q'@Ei4
import org.rut.util.algorithm.SortUtil; L#q9_-(#
YKOO(?lv
/** b7sE
* @author treeroot >1I2R/'
* @since 2006-2-2 (ul-J4E\O
* @version 1.0 fYM6wYJ
*/ (H%d]
public class ImprovedMergeSort implements SortUtil.Sort { UZXcKl>u
8'WMspX
private static final int THRESHOLD = 10; )pn7DIXG
ai _fN
/* k&iScMgCTH
* (non-Javadoc) ^|i\d\
* @"Fp;Je\bN
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) w[oQ}5?9'
*/ Mq lo:7 ^F
public void sort(int[] data) { @EOR]^?!]
int[] temp=new int[data.length]; M2P@ &
mergeSort(data,temp,0,data.length-1); 33*d/%N9
} aX'g9E
b_gN?F7_
private void mergeSort(int[] data, int[] temp, int l, int r) { vcJb\LW
int i, j, k; nk|N.%E
int mid = (l + r) / 2; j*~dFGl)
if (l == r) OK?3,<x
return; J$9xC{L4
if ((mid - l) >= THRESHOLD) AKCfoJ
mergeSort(data, temp, l, mid); K0RYI69_
else Dq%r !)
insertSort(data, l, mid - l + 1); Fxth>O`$
if ((r - mid) > THRESHOLD) j[J@tM#
mergeSort(data, temp, mid + 1, r); ]{2{:`s
else Q] yT
insertSort(data, mid + 1, r - mid); C6V&R1"s
0"qim0%|DF
for (i = l; i <= mid; i++) { !eAdm
temp = data; !:O/|.+Vmf
} OV("mNh
for (j = 1; j <= r - mid; j++) { LLn{2,jfQ
temp[r - j + 1] = data[j + mid]; nHA`B.:B
} *(&ClUQQ
int a = temp[l]; .4C[D{4
int b = temp[r]; >yA,@%X
for (i = l, j = r, k = l; k <= r; k++) { ^A"lkV7
if (a < b) { K l0tyeT
data[k] = temp[i++]; -wRyMY_D
a = temp; +>WC^s
} else { qz=#;&ZU
data[k] = temp[j--]; <r+!hJ[s'
b = temp[j]; ,*nZf|
} g y e(/N+I
} <.=#EV^i
} [bi3%yWh
vMZ7uO
/** L_lDFF
* @param data 4$zFR}f
* @param l ZkB6bji
* @param i |;.Pj3)-
*/ q 5v?`c
private void insertSort(int[] data, int start, int len) { *)`kx
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); :m++ iR
} TcKvSdr'
} g#'fd/?Q
} x*R8^BA]pR
} UrhM)h?%
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堆排序： Vy% :\p+
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package org.rut.util.algorithm.support; U!\2K~
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import org.rut.util.algorithm.SortUtil; [UJEU~XC
WE.$at{*h
/** y KYP
* @author treeroot iIGI=EwZ
* @since 2006-2-2 A`x -L
* @version 1.0 iJZ|[jEDV
*/ JIP+ !2
public class HeapSort implements SortUtil.Sort{ };"+ O
<K,% y(]
/* (non-Javadoc) O@r.>
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ckf<N9
*/ RrO0uadmn
public void sort(int[] data) { 5i4V5N>3
MaxHeap h=new MaxHeap(); 77xq/c[)
h.init(data); i[2bmd!H
for(int i=0;i h.remove(); 9QH9gdiw
System.arraycopy(h.queue,1,data,0,data.length); p2Dh3)&
} J+71FP`ZH
97(Xu=tX
private static class MaxHeap{ S$jV|xKB
<}EV*`w4
void init(int[] data){ B?;' lDz*
this.queue=new int[data.length+1]; *gd?>P7\0
for(int i=0;i queue[++size]=data; <Qcex3
fixUp(size); )+n,5W
} JQ"`9RNb
} Xq,UV
ePq13!FC/
private int size=0; cebs.sF:
gV"qV
private int[] queue; =f4[=C$&`
<G~}N
public int get() { &2io^AP
return queue[1]; TvunjTpaj
} m"gni #
UCn*UX
public void remove() { r zMFof
SortUtil.swap(queue,1,size--); Ew %{ i(d
fixDown(1); %XP_\lu]
} D!bKm[T
file://fixdown GJ1;\:cQq
private void fixDown(int k) { d~{jEg
int j; L$+d.=]
while ((j = k << 1) <= size) { K\{b!Cfr^
if (j < size %26amp;%26amp; queue[j] j++; W\@?e32
if (queue[k]>queue[j]) file://不用交换 9Z,*h-o
break; {W5ydHXy
SortUtil.swap(queue,j,k); bJQ5- *F
k = j; AT B\^;n.
} cOSxg=~>u
} eyeNrk*2o
private void fixUp(int k) { [G{rHSK5tQ
while (k > 1) { CM%|pB/z
int j = k >> 1; < /;Q8;0
if (queue[j]>queue[k]) V$/u
break; Em e'Gk
SortUtil.swap(queue,j,k); Sl3KpZ
k = j; Gb(C#,xbK
} $Wit17j
} r]A"Og_U
}P<Qz^sr_
} tcBC!_vF
xS6(K
} #ZG3|#Q=L
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SortUtil： C#MFpT
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package org.rut.util.algorithm; }3v'Cp0L
$ A-+E\vQ@
import org.rut.util.algorithm.support.BubbleSort; JDLTOLG
import org.rut.util.algorithm.support.HeapSort; &w+;N5}3
import org.rut.util.algorithm.support.ImprovedMergeSort; slU
import org.rut.util.algorithm.support.ImprovedQuickSort; (k%GY< bP
import org.rut.util.algorithm.support.InsertSort; W8w3~
import org.rut.util.algorithm.support.MergeSort; 01U *_\
import org.rut.util.algorithm.support.QuickSort; bTZ>@~$
import org.rut.util.algorithm.support.SelectionSort; 9$Ig~W)
import org.rut.util.algorithm.support.ShellSort; 0:Ar|to$m
;% 2wGT
/** Ho3dsh)
* @author treeroot U'tE^W
* @since 2006-2-2 FH)t:!#
* @version 1.0 CzYGq
*/ ;wJ~haC
public class SortUtil { $o]r]#B+
public final static int INSERT = 1; :w@F?:C
public final static int BUBBLE = 2; 81~Kpx
public final static int SELECTION = 3; A0G)imsW:_
public final static int SHELL = 4; t?gJNOV
public final static int QUICK = 5; v`y6y8:>
public final static int IMPROVED_QUICK = 6; Z+g1~\
public final static int MERGE = 7; !CVuw
public final static int IMPROVED_MERGE = 8; <0CzB"Ap
public final static int HEAP = 9; #EJhAJ
B?+.2
public static void sort(int[] data) { {jvOHu
sort(data, IMPROVED_QUICK); ]b3/Es+
} ,eR8~(`=
private static String[] name={ 6SE6AL<b
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" $:Rn;
}; FY$fV"s
gX[|;IZ0o
private static Sort[] impl=new Sort[]{ 4|`Yz%'
new InsertSort(), )h#]iGVN}
new BubbleSort(), puOC60zI
new SelectionSort(), Ck: 9gn
new ShellSort(), Rj^7#,993
new QuickSort(), :z]}ZZ
new ImprovedQuickSort(), ?AEd(_a!q
new MergeSort(), -;^;2#](g
new ImprovedMergeSort(), q#MM
new HeapSort() !lAD q|$
}; sONBQ9
o/C(4q6d
public static String toString(int algorithm){ 9Gca6e3
return name[algorithm-1]; - ay5
} O`WIkBV!
>&OUGu|
public static void sort(int[] data, int algorithm) { #/|75 4]]
impl[algorithm-1].sort(data); zrs<#8!Y_!
} (:5G#?6,
9qKzS<"h
public static interface Sort { [QT1Ju64
public void sort(int[] data); Wt^|BjbB4
} -_NC%iN#C
98fu>>*G{
public static void swap(int[] data, int i, int j) { l[ne/O JJ
int temp = data; Ir5WN_EaS
data = data[j]; %JtbRs(~q
data[j] = temp; mLwoi!]m
} {Hl[C]25X
} TI=h_%mO