[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; HGj[\kU~
} ?#ywUEY* i
int i1=l; {;JFoe+
int i2=mid+1; `j.-hy>s
for(int cur=l;cur<=r;cur++){ 8D^ iQBA
if(i1==mid+1) |hu9)0P
data[cur]=temp[i2++]; F22]4DLHO
else if(i2>r) H}1XK|K3#H
data[cur]=temp[i1++]; UM+g8J{$*;
else if(temp[i1] data[cur]=temp[i1++]; >-`-D=!V
else ai4ro"H
data[cur]=temp[i2++]; 2)q$HUIX
} +]C|y ,r
} U\YzE.G1]S
g9=O<u#
} 7Uh/Gl
D;DI8.4`N
改进后的归并排序: dFnu&u"
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package org.rut.util.algorithm.support; 79'N/:.
dW|S\S'&
import org.rut.util.algorithm.SortUtil; 5 ^tetDz}
H|;BT
/** 3J^'x
* @author treeroot jrYA5>=>#
* @since 2006-2-2 0IbR>zFg.
* @version 1.0 oi^pU
*/ @CCDe`R*
public class ImprovedMergeSort implements SortUtil.Sort { [;7$ 'lr%D
r$!
private static final int THRESHOLD = 10; re@OPiXa v
"/\-?YJjw
/* Novn#0a
* (non-Javadoc) QWwEfL
* m&6)Vt
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @c%h fI
*/ ~t.i;eu
public void sort(int[] data) { z"{Ji{>%=
int[] temp=new int[data.length]; lhFv2.qR
mergeSort(data,temp,0,data.length-1); ~NwX,-ri
} )TkXdA?.
0 |Rmb
private void mergeSort(int[] data, int[] temp, int l, int r) { &[-b#&y
int i, j, k; thQ)J|1
int mid = (l + r) / 2; >=L<3W1
if (l == r) 4Mjcx.21
return; p+{*&Hm5
if ((mid - l) >= THRESHOLD) hKQg:30<
mergeSort(data, temp, l, mid); *Cx3bg*Gan
else tWI4x3&2
insertSort(data, l, mid - l + 1); Ky[-ZQQo=5
if ((r - mid) > THRESHOLD) <cR]-Yr~
mergeSort(data, temp, mid + 1, r); ,N2|P:x
else >iWw i'T=
insertSort(data, mid + 1, r - mid); u-X P`
6vZ.CUK9
for (i = l; i <= mid; i++) { /q6 ^.>b
temp = data; um mkAeWb
} _n3"
for (j = 1; j <= r - mid; j++) { E&2mFg
temp[r - j + 1] = data[j + mid]; FZJ sZeO
} kQ $.g<
int a = temp[l]; 1}I%yOi)
int b = temp[r]; ?\T):o;/
for (i = l, j = r, k = l; k <= r; k++) { )Hlc\Mgy
if (a < b) { X&bnyo P
data[k] = temp[i++]; DzK%$#{<
a = temp; :g"UG0];
} else { $N17GqoC
data[k] = temp[j--]; c UHKE\F
b = temp[j]; 7V7iIbi
} .s>PDzM$
} w!/se;_H+w
} .c2Zr|X
ZHOh(
/** tCP;IU$
* @param data DTSK*a`
* @param l /-&a]PJ
* @param i 1 c4I`#_v
*/ ~z*A%vp6ER
private void insertSort(int[] data, int start, int len) { orr6._xw
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 8>~\R=SC
} $+Vp>
} pe7R1{2Q_s
} DM)%=C6<
} 6 2#dSd}HG
a?X{k|;!7u
堆排序： M}b[;/~
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package org.rut.util.algorithm.support; @G>Q(a*,
!&8HA
import org.rut.util.algorithm.SortUtil; }6^d/nE*T
[%yCnt
/** 58.b@@T
* @author treeroot '"<h;|
* @since 2006-2-2 *[O)VkL\%i
* @version 1.0 /?g:`NT
*/ T@,tlIM
public class HeapSort implements SortUtil.Sort{ K\vyfYi
Z{J{6j
/* (non-Javadoc) C*1,aLSw
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $ -n?q w
*/ d#]XyN>
public void sort(int[] data) { Ct,|g =(
MaxHeap h=new MaxHeap(); u'Ua ++a\
h.init(data); &KZr`"cT#
for(int i=0;i h.remove(); ;Jq7E
System.arraycopy(h.queue,1,data,0,data.length); c2fbqM~
} %Ut7%obpi
gls %<A{C
private static class MaxHeap{ NT<>LWo
is [p7-
void init(int[] data){ A5LTgGzaW
this.queue=new int[data.length+1]; g4 G?hv`R
for(int i=0;i queue[++size]=data; MZInS:Vj
fixUp(size); f)/5%W7n}
} =]yzy:~ey
} {E+o+2L
idh5neyL
private int size=0; } :8{z`4H
vpl> 5%
private int[] queue; 3BWYSJ|
y&$v@]t1
public int get() { xsIuPL#_
return queue[1]; h1`u-tc2x
} iw==q:$
op]HF4
public void remove() { 7`IoQvX
SortUtil.swap(queue,1,size--); %uWq)D4r
fixDown(1); eL7\})!W
} +Tug.[A
file://fixdown pN ^^U[
private void fixDown(int k) { pAd 8-a
int j; &6mXsx$
while ((j = k << 1) <= size) { 5bKm)|4z6
if (j < size %26amp;%26amp; queue[j] j++; bF X0UE>
if (queue[k]>queue[j]) file://不用交换 :yTpjC-S]
break; pa@@S$(
SortUtil.swap(queue,j,k); ;"77?)
k = j; s;eOX\0
} 5D#Mhgun
} y6*9, CF
private void fixUp(int k) { G uLU7a
while (k > 1) { `78:TU~5S
int j = k >> 1; L]C|&KP
if (queue[j]>queue[k]) |wFfVDp
break; m$X0O_*A
SortUtil.swap(queue,j,k); ?UGA-^E1
k = j; )LP=IT
} 93aRWEu3
} `/0S]?a.{B
eJ3w}"?9s
} `x0GT\O2-
hH|moj]
} ..g?po
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SortUtil： ;$Q&2}L[
KDODUohC
package org.rut.util.algorithm; ^t'mfG|DV
:t36]NM
import org.rut.util.algorithm.support.BubbleSort; *Fe
import org.rut.util.algorithm.support.HeapSort; ~ojH$=K>d
import org.rut.util.algorithm.support.ImprovedMergeSort; D|`I"N[<
import org.rut.util.algorithm.support.ImprovedQuickSort; lSu\VCG
import org.rut.util.algorithm.support.InsertSort; B]o5HA<k
import org.rut.util.algorithm.support.MergeSort; 2#y!(D8
import org.rut.util.algorithm.support.QuickSort; V"T48~Ue
import org.rut.util.algorithm.support.SelectionSort; j(|9>J*,~G
import org.rut.util.algorithm.support.ShellSort; Bi'qy]%
uGxh}'&
/** gh{Z=_
* @author treeroot */ ~_3
* @since 2006-2-2 '8$*gIQ8
* @version 1.0 E~y@ue:
*/ 1D6F WYV8
public class SortUtil { 0A}'@N@G)
public final static int INSERT = 1; ~F ,mc.
public final static int BUBBLE = 2; -J$,W`#z
public final static int SELECTION = 3; eiJ13`T
public final static int SHELL = 4; 6!eI=h2P
public final static int QUICK = 5; A+:X
public final static int IMPROVED_QUICK = 6; !X5~!b^*
public final static int MERGE = 7; X{j`H\'L
public final static int IMPROVED_MERGE = 8; dF?:&oP]
public final static int HEAP = 9; sKvz<7pag
sfv{z!mo
public static void sort(int[] data) { <ETR6r
sort(data, IMPROVED_QUICK); d0Jaa1b~O
} bCv^za]P6
private static String[] name={ f""+jc1
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" cM= ?{W7~
}; |NsrO8H
aOj(=s
private static Sort[] impl=new Sort[]{ 9F&s9(=\
new InsertSort(), c%N8|!e
new BubbleSort(), P}AfXgr
new SelectionSort(), HX(Z(rcI
new ShellSort(), BO3#*J5S\
new QuickSort(), |V 3AA
new ImprovedQuickSort(), {g%F 3-
new MergeSort(), Dp5hr8bT
new ImprovedMergeSort(), _qZ?|;o^
new HeapSort() HFr#Ql>g
}; =Qa*-*
%SHjJCS3
public static String toString(int algorithm){ yt+"\d
return name[algorithm-1]; tdl Y
} <d$L}uQwg
#fy#G}c
public static void sort(int[] data, int algorithm) { phT|w H
impl[algorithm-1].sort(data); /:YJ2AARY
} ] X9e|
Fjc4[ C
public static interface Sort { 1Rrl59}5
public void sort(int[] data); I(cy<ey+e
} o]#M8)=
XpFoSW#K
public static void swap(int[] data, int i, int j) { E7_)P>aS5
int temp = data; HH\6gs]u
data = data[j]; b?p_mQKtZ
data[j] = temp; @213KmB.
} ww_gG5Fc$
} w4S0aR:yL