[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; hgG9m[?K
} : $1?i)
int i1=l; 8S TvCH"Z_
int i2=mid+1; "x0^#AVg
for(int cur=l;cur<=r;cur++){ sI=xl
if(i1==mid+1) AYBns]!
data[cur]=temp[i2++]; [jQp~&nY
else if(i2>r) &u."A3(
data[cur]=temp[i1++]; CO/]wS
else if(temp[i1] data[cur]=temp[i1++]; h'llK6_)
else 9cbd~mM{
data[cur]=temp[i2++]; h,:m~0gmj
} ]h`&&Bqt
} .vf'YNQ%
mY|)KJ
} P}}* Q7P
l:~/<`o
改进后的归并排序: J3V= 46Yc
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package org.rut.util.algorithm.support; ELoDd&d8
!/b>sN}
import org.rut.util.algorithm.SortUtil; n`_{9R
,&A7iO
/** RMV/&85?y
* @author treeroot 6yG^p]zZ
* @since 2006-2-2 g{)dP!}
* @version 1.0 u{cW:
*/ {lzWrUGO
public class ImprovedMergeSort implements SortUtil.Sort { QW~E&B%
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private static final int THRESHOLD = 10; ,<_A2t 2
5DU6rks%
/* y-b%T|p9
* (non-Javadoc) VBlYvZ;$*
* t.y2ff<[U
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) H7Rx>h_
*/ ?=msH=N<l
public void sort(int[] data) { .NC!7+1m
int[] temp=new int[data.length]; q[_VuA]&
mergeSort(data,temp,0,data.length-1); e)k9dOR
} HyQJXw?A:
]jQutlg|
private void mergeSort(int[] data, int[] temp, int l, int r) { Wis~$"
int i, j, k; C 82omL
int mid = (l + r) / 2; a5^]20Fa
if (l == r) sE<V5`Z=
return; 7aRi5
if ((mid - l) >= THRESHOLD) p`dU2gV
mergeSort(data, temp, l, mid); 2a)xTA#
else FX&~\kmV'j
insertSort(data, l, mid - l + 1); &BLJT9Frx
if ((r - mid) > THRESHOLD) EJ.SW5
mergeSort(data, temp, mid + 1, r); 76Cl\rV
else !-x$L>1$
insertSort(data, mid + 1, r - mid); Ta0|+IYk<
?!:ha;n
for (i = l; i <= mid; i++) { \:'/'^=#|
temp = data; Rok7n1gW
} UgSB>V<?
for (j = 1; j <= r - mid; j++) { Xl{P8L
temp[r - j + 1] = data[j + mid]; HRCT}
} 558V_y:
int a = temp[l]; 8'[7 )I=
int b = temp[r]; ^/>(6>S^M
for (i = l, j = r, k = l; k <= r; k++) { x+:UN'"r
if (a < b) { mDABH@R
data[k] = temp[i++]; {4}yKjW%z
a = temp; n,(sBOQ
} else { =ho}oL,ZO
data[k] = temp[j--]; ]cWUZ{puRB
b = temp[j]; 4he GnMD
} Zn+.;o)E<
} %XDc,AR[
} HZB>{O
P )"m0Lu<
/** 2;`1h[,-^
* @param data b5I I/Y
* @param l )9G[dDeC
* @param i N)|yu1S
*/ {\"x3;3!6
private void insertSort(int[] data, int start, int len) { ^7cGq+t
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); \ZFGw&yN
} KP^V>9q
} `2WFk8) F
} )[6U^j4
} ZY={8T@
<?6|.\&
堆排序： #U4F0BdA
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package org.rut.util.algorithm.support; bHYy}weZ
X/!o\yyT
import org.rut.util.algorithm.SortUtil; @f~RdO3
wE>\7a*P%
/** `pa!~|p
* @author treeroot {hjhL: pg
* @since 2006-2-2 ~"H,/m%2o
* @version 1.0 {SPq$B_VR
*/ )p0^zv{
public class HeapSort implements SortUtil.Sort{ l`{\"#4
=`F(B
/* (non-Javadoc) IB"w&sBy
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) L(<*)No
*/ ;-lXU0}&
public void sort(int[] data) { sN*N&XG
MaxHeap h=new MaxHeap(); . B9iLI
h.init(data); LVfF[
for(int i=0;i h.remove(); DB|Y
System.arraycopy(h.queue,1,data,0,data.length); U^%Q}'UYym
} \;3~a9q%
jl$ece5v
private static class MaxHeap{ A]0 St@
K~{$oD7!
void init(int[] data){ AaOuL,l
this.queue=new int[data.length+1]; F?*-4I-
for(int i=0;i queue[++size]=data; ,/%=sux
fixUp(size); [< ?s?Ci
} ;>yxNGV`
} &*,#5.
}Yzco52
private int size=0; 2DtM20<>
x%m%_2%Z
private int[] queue; Egp/f|y
~{g [<Qi
public int get() { mt{nm[D!Xp
return queue[1]; KIf dafRL
} gMmaK0uhS
eS\Vib
public void remove() { SCHP L.n
SortUtil.swap(queue,1,size--); cWsNr'MS*
fixDown(1); vhW2PzHFRi
} Xll}x+'uZK
file://fixdown O)*+="Rg
private void fixDown(int k) { O!#g<`r{K
int j; +H-6eP
while ((j = k << 1) <= size) { 9G#n 0&wRJ
if (j < size %26amp;%26amp; queue[j] j++; DDP/DD;n}r
if (queue[k]>queue[j]) file://不用交换 xd?f2=dd~h
break; W)2p@j59A
SortUtil.swap(queue,j,k); b9J_1Gl]
k = j; R6Km\N
} m@2QnA[4
} OmpND{w
private void fixUp(int k) { RuA*YV
while (k > 1) { y<|7z99L
int j = k >> 1; O7m(o:t x3
if (queue[j]>queue[k]) mbTEp*H
break; Lv;^My
SortUtil.swap(queue,j,k); %KhI>O<
k = j; Ys!82M$g
} X::JV7hu
} E)5\i-n
*20jz<
} EoR}Af
IqaT?+O\?r
} {yHCXFWlS
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SortUtil： XkE`U5.
JV^=v@Z3
package org.rut.util.algorithm; rNWw?_H-H(
5h=}j
import org.rut.util.algorithm.support.BubbleSort; %~H-)_d20
import org.rut.util.algorithm.support.HeapSort; ?}tFN_X"
import org.rut.util.algorithm.support.ImprovedMergeSort; *=/ { HvJ
import org.rut.util.algorithm.support.ImprovedQuickSort; Cazocq5
import org.rut.util.algorithm.support.InsertSort; @sW24J1q+
import org.rut.util.algorithm.support.MergeSort; +NZ_D#u
import org.rut.util.algorithm.support.QuickSort; x;P_1J%Q
import org.rut.util.algorithm.support.SelectionSort; .\ULbN3Z
import org.rut.util.algorithm.support.ShellSort; d9fC<Tp
XH4
/** %+W{iu[|
* @author treeroot r1`x=r
* @since 2006-2-2 |P HT694Uz
* @version 1.0 f;o5=)Y
*/ eCU:Q
public class SortUtil { "Y =;.:qe
public final static int INSERT = 1; _ @NL;w:!
public final static int BUBBLE = 2; kzQ+j8.,U
public final static int SELECTION = 3; X; \+<LE
public final static int SHELL = 4; &ZlVWK~v
public final static int QUICK = 5; =vCY?I$P
public final static int IMPROVED_QUICK = 6; zII|9y
public final static int MERGE = 7; )hn6sXo+
public final static int IMPROVED_MERGE = 8; u^+7hkk
public final static int HEAP = 9; DZ'P@f)]
{0Yf]FQb-a
public static void sort(int[] data) { r;.yz I
sort(data, IMPROVED_QUICK); jjB~G^n
} m<T%Rb4?@
private static String[] name={ O~#!l"0 L+
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" `!;_ho
}; gZ3u=uME
Xv5wJlc!d
private static Sort[] impl=new Sort[]{ Ct<udO
new InsertSort(), H7&8\FNa
new BubbleSort(), FF`T\&u
new SelectionSort(), 9X+V4xux
new ShellSort(), wj$<t'MN
new QuickSort(), ~rqCN,=d
new ImprovedQuickSort(), urs,34h
new MergeSort(), .LnGL]/
new ImprovedMergeSort(), B:yGS*.tu
new HeapSort() ;s= l52
}; L2[($l
W fN2bsx>
public static String toString(int algorithm){ j|DsG,
return name[algorithm-1]; ` xEx^P^7
} $kdB |4C
g#pr yYz
public static void sort(int[] data, int algorithm) { O-0x8O^B
impl[algorithm-1].sort(data); ?DS@e@lx
} c(f
T?CdZc.
public static interface Sort { F`9xVnK=
public void sort(int[] data); lBLARz&c#
} 'A=^Se`=
t:x\kp
public static void swap(int[] data, int i, int j) { b;B%q$sntC
int temp = data; A7Cm5>Y_S
data = data[j]; kYP#SH/
data[j] = temp; CAig]=2'
} :S{BbQ){]
} \j}ZB<.>