[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; pzb`M'Z?C
} aVp-Ps|r
int i1=l; ZUS06#t}
int i2=mid+1; m}'!W`<
for(int cur=l;cur<=r;cur++){ .@psW0T%
if(i1==mid+1) NtkZ\3
data[cur]=temp[i2++]; @4$la'XSx
else if(i2>r) 8Fv4\dr
data[cur]=temp[i1++]; gdS@NUM
else if(temp[i1] data[cur]=temp[i1++]; ($t;Xab
else _gQ_ixu
data[cur]=temp[i2++]; eg"A?S
} [X ]XH
} KxDfPd+j[
'?T<o
} g#o9[su
6 2t9SY
改进后的归并排序: wI?AZd;`'
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package org.rut.util.algorithm.support; );{76
;#=y5Q4
import org.rut.util.algorithm.SortUtil; '`j MNKn\
OV`li#H
/** J:G{
* @author treeroot W&7(
* @since 2006-2-2 goc; .~?
* @version 1.0 eQ<GNvm
*/ .M0pb^M
public class ImprovedMergeSort implements SortUtil.Sort { bSa]={}L(
<tdsUh:?&
private static final int THRESHOLD = 10; l0eh}d
k=9k4l
/* 2yVQqwQm
* (non-Javadoc) (V0KmNCW`
* t:n$9WB)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Zi<(>@z2
*/ M6y|;lh''c
public void sort(int[] data) { #v*3-) 8
int[] temp=new int[data.length]; dv?t;D@p!
mergeSort(data,temp,0,data.length-1); }>_
} l7U<]i GL
>J{e_C2ZS
private void mergeSort(int[] data, int[] temp, int l, int r) { zICrp
int i, j, k; rVwW%&
int mid = (l + r) / 2; @/xdWN!,
if (l == r) ,mM7g
return; wpt5'|I
if ((mid - l) >= THRESHOLD) )lP(isFP
mergeSort(data, temp, l, mid); Z<'iT%6+r
else S$/SFB$)~W
insertSort(data, l, mid - l + 1); 60l!3o"p!
if ((r - mid) > THRESHOLD) MHS|gR.c
mergeSort(data, temp, mid + 1, r); dRUmC H
else HahA} Q
insertSort(data, mid + 1, r - mid); !w/]V{9`X
=69sWcC8
for (i = l; i <= mid; i++) { @XVx{t;g2
temp = data; czK}F/Sg`
} 7A{Z1[7
for (j = 1; j <= r - mid; j++) { f;!L\$yKy
temp[r - j + 1] = data[j + mid]; HBA|NV3.
} sn+ kFvk}S
int a = temp[l]; o;>qsn8
int b = temp[r]; +ZkJ{r0,(
for (i = l, j = r, k = l; k <= r; k++) { IiV]lxiE]
if (a < b) { QT4vjz+|
data[k] = temp[i++]; WLH ;{
a = temp; &:~9'-O
} else { /*Gbl
data[k] = temp[j--]; z6fY_LL
b = temp[j]; yF-`f _
} 3dgPP@7d$
} KON^
} Rb0{W]opt+
a..LbQQ
/** KBA&s
* @param data Z>*a:|
* @param l L%Ms?`i,
* @param i WfQZ7e
*/ U-D00l7C
private void insertSort(int[] data, int start, int len) { U"Y/PBs,
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 'tt4"z2
} zL3I!& z2
} TRr%]qd{Hr
} e@PY(#ru
} u ^M'[<{
7gREcL2
堆排序： I0G[K~gb
\)W Z D
package org.rut.util.algorithm.support; zek>]l`!
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import org.rut.util.algorithm.SortUtil; eTI?Mu>C
()<?^lr33
/** lInf,Q7W
* @author treeroot i0~Af`v
* @since 2006-2-2 $p*.[)
* @version 1.0 $)6x3&]P
*/ 7_J0[C!G
public class HeapSort implements SortUtil.Sort{ }/jWa|)f
gI/(hp3ob
/* (non-Javadoc) 6UU<:KH
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0JW =RW
*/ u.}H)wt
public void sort(int[] data) { <(1[n pS&+
MaxHeap h=new MaxHeap(); (Mw+SM3<
h.init(data); w,t !<i
for(int i=0;i h.remove(); gO/\Yi
System.arraycopy(h.queue,1,data,0,data.length); QE721y
} k{bC3)'$#R
{gzVbZ#
private static class MaxHeap{ 9[[$5t`8
XJ1Bl
void init(int[] data){ ,M$h3B\;r
this.queue=new int[data.length+1]; FLIU}doc
for(int i=0;i queue[++size]=data; Sx1OY0)s
fixUp(size); EIF
} \/-4jF:
} *]c~[&x5&
1JV-X G6
private int size=0; ssl.Y!
:.(A,
private int[] queue; Z7k ku:9
H`jnChD:M'
public int get() { }- wK
return queue[1]; A>)Ced!
} RQ4+EW1G
^b 3nEcQn
public void remove() { EtQ:x$S_
SortUtil.swap(queue,1,size--); L0Ajj=
fixDown(1); 3Te&w9K
} 1! 5VWF0
file://fixdown Cv;#8Wj}
private void fixDown(int k) { JD9=gBN\?
int j; N;4wbUPL7h
while ((j = k << 1) <= size) { @S 0mNA
if (j < size %26amp;%26amp; queue[j] j++; Kaji&Ibd
if (queue[k]>queue[j]) file://不用交换 D-e?;<
break; q``/7
SortUtil.swap(queue,j,k); -]G=Q1 1
k = j; fnIF<Zt
} c GyBml1
} tRNMiU
private void fixUp(int k) { TgKSE1
while (k > 1) { V;hO1xfR3&
int j = k >> 1; 5ka6=R(r
if (queue[j]>queue[k]) WT}xCni
break; un}!&*+
SortUtil.swap(queue,j,k); D'#,%4P,e\
k = j; 6NQ`IC
} @h(Z;
} bk]g}s
E`]un.
} FytGg[#]
2 ]n4)vv,
} +`!>lo{X
t ;fJ`.
SortUtil： ULO_?4}B
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package org.rut.util.algorithm; $"va8,
qRq4PQ@
import org.rut.util.algorithm.support.BubbleSort; En4!-pWHQ
import org.rut.util.algorithm.support.HeapSort; Ao@WTs9
import org.rut.util.algorithm.support.ImprovedMergeSort; <4CqG4}Y
import org.rut.util.algorithm.support.ImprovedQuickSort; l< HnPR/
import org.rut.util.algorithm.support.InsertSort; /v.<h*hxWy
import org.rut.util.algorithm.support.MergeSort; GGUwS
import org.rut.util.algorithm.support.QuickSort; +jO#?J
import org.rut.util.algorithm.support.SelectionSort; bGK-?BE5+A
import org.rut.util.algorithm.support.ShellSort; ^ Z3y
ft~QVe!
/** 'r1X6?dJ
* @author treeroot :_Iz( 2hV
* @since 2006-2-2 u/xP$
* @version 1.0 iO$ ?No
*/ [7 t
public class SortUtil { C8=rsh
public final static int INSERT = 1; /l8wb~vl
public final static int BUBBLE = 2; l~[ K.p&
public final static int SELECTION = 3; 9t8ccr
public final static int SHELL = 4; A,c_ME+DVB
public final static int QUICK = 5; O`Htdnu
public final static int IMPROVED_QUICK = 6; SZ:R~4 A
public final static int MERGE = 7; zoBp02j
public final static int IMPROVED_MERGE = 8; VBW][f
public final static int HEAP = 9; -b34Wz(
IR32O,)
public static void sort(int[] data) { {MUO25s02
sort(data, IMPROVED_QUICK); {c7@`AV]
} M XuHA?
private static String[] name={ .=) *Qx+
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ONUa7
}; j"+6aD/lv
-s^cy+jd
private static Sort[] impl=new Sort[]{ D;OPsNQ
new InsertSort(), {mLv?"M]
new BubbleSort(), .(s@{=
new SelectionSort(), i_nUyH%b
new ShellSort(), `%~f5<
new QuickSort(), Iz&d S?p_
new ImprovedQuickSort(), Wxgs66
new MergeSort(), W#kLM\2L
new ImprovedMergeSort(), 8E>2 6@.
new HeapSort() !/1~
}; O#<S\66
y^D3}ds
public static String toString(int algorithm){ Z=l2Po n
return name[algorithm-1]; g_eR&kuh
} ?P}) Qa
X>Z83qV5d!
public static void sort(int[] data, int algorithm) { :u2tu60&MJ
impl[algorithm-1].sort(data); [a.(0YLr'w
} YVk +zt~S
sosIu
public static interface Sort { ClufP6'
public void sort(int[] data); ~`5[Li:eP
} Xd.y or
COd~H
public static void swap(int[] data, int i, int j) { -L2?Tap
int temp = data; U^-RyE!}
data = data[j]; r l;Y7l
data[j] = temp; COD^osM@
} 2\gbciJ[{(
} (~(FQ:L%U