[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; H-/w8_} KG
} b<\aJb{2
int i1=l; +(/' b'*
int i2=mid+1; N"-U)d-.
for(int cur=l;cur<=r;cur++){ K6G+sBw[
if(i1==mid+1) 7(plHW|
data[cur]=temp[i2++]; YF68Ax]
else if(i2>r) }2.0e5[
data[cur]=temp[i1++]; 9six]T
else if(temp[i1] data[cur]=temp[i1++]; #iVr @|,
else _0h)O
data[cur]=temp[i2++]; L.Tu7+M4
} c$b~?Mx
} {N'<_%cu
~fY\;
} 'j'G4P_G
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改进后的归并排序: <gu>06
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package org.rut.util.algorithm.support; Vl`!6.F3
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import org.rut.util.algorithm.SortUtil; Y^-D'2P]P
"/0Vvy_|
/** YES-,;ZQ'
* @author treeroot h42dk(B
* @since 2006-2-2 8Bwm+LYr-
* @version 1.0 NT;cTa=;
*/ rtC:3fDy
public class ImprovedMergeSort implements SortUtil.Sort { O*udVE>
&@fW6},iW
private static final int THRESHOLD = 10; xFp?+a
9^1li2zk{
/* @~C C$Y$
* (non-Javadoc) h%8C_mA
* o@uZU4MM
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) n0%5mTUN
*/ X1FKcWv
public void sort(int[] data) { 4`]
int[] temp=new int[data.length]; \fSo9$
mergeSort(data,temp,0,data.length-1); tNC;CP#R+
} ^7iP!-w/
bBgyLyg
private void mergeSort(int[] data, int[] temp, int l, int r) { O6$n VpD3
int i, j, k; t-?#x
int mid = (l + r) / 2; w" ,ab j
if (l == r) p@[n(?duC.
return; +Y"HbNz
if ((mid - l) >= THRESHOLD) ra}t#Xt`
mergeSort(data, temp, l, mid); Q=h37]U+
else Rgb&EnVW
insertSort(data, l, mid - l + 1); =i:,")W7=
if ((r - mid) > THRESHOLD) \e' oAhM
mergeSort(data, temp, mid + 1, r); "w{$d&+?ag
else D8\9nHUD`
insertSort(data, mid + 1, r - mid); 7g-{<d
t`pbEjE0K
for (i = l; i <= mid; i++) { ZDbzH=[
temp = data; rj/1AK
} L!0}&i;u~5
for (j = 1; j <= r - mid; j++) { r;@"s g
temp[r - j + 1] = data[j + mid]; FE3uNfQs|
} Nn-EtM0w
int a = temp[l]; iH>IV0 <
int b = temp[r]; =?[:Nj636
for (i = l, j = r, k = l; k <= r; k++) { (CrP6]=
if (a < b) { BY>]6SrP
data[k] = temp[i++]; hUe\sv!x?
a = temp; ;!,I1{`
} else { .Z(Q7j^
data[k] = temp[j--]; (N?nOOQ
b = temp[j]; ,jdTe?[*^
} 52.%f+Oa
} 349BQ5ND
} 9yWSlbPr]
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/** B_S))3
* @param data V0!kvIv
* @param l `Ln1g@
* @param i 6 jU?~
*/ SS!b`
private void insertSort(int[] data, int start, int len) { <['ucp
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); d"OYq
} 3hfv^H
} 5,9cD`WR^
} \]0+J
} =}'7}0M_=
2?kVbF
堆排序： D*t[5,~j
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package org.rut.util.algorithm.support; h(p cGE
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import org.rut.util.algorithm.SortUtil; p<c1$O*
&"d :+!4h
/** vDCbD#.6
* @author treeroot JfRqOEP4Y
* @since 2006-2-2 ufo\p=pGG
* @version 1.0 &Xi]0\M)
*/ lm|s%
public class HeapSort implements SortUtil.Sort{ wowWq\euY
? kCo/sW
/* (non-Javadoc) TecWv@.
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) t|C?=:_
*/ Q}|0
public void sort(int[] data) { %lGT|XrY
MaxHeap h=new MaxHeap(); pER[^LH_)
h.init(data); ??z&w`Yy,
for(int i=0;i h.remove(); W/.Wp|C}K3
System.arraycopy(h.queue,1,data,0,data.length); 2/ejU,S
} |y&vMx~t
y\Wp}}
private static class MaxHeap{ .t.4y. 97
='6@^6y
void init(int[] data){ p~OX1RBI
this.queue=new int[data.length+1]; ?dmwz4k0
for(int i=0;i queue[++size]=data; r=#v@]zB
fixUp(size); &/?OP)N,}
} BiA^]h/|
} K0\`0E^,
kH?PEA! \
private int size=0; BC R]K
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private int[] queue; DTl&V|h$
BirnCfj/2
public int get() { .&.L@CRH
return queue[1]; ;iz3Bf1o
} zC`ediyu
e#@u&+K/f
public void remove() { 2]}e4@{
SortUtil.swap(queue,1,size--); mh35S!I3I^
fixDown(1); 5hfx2O)
} J9P\D!
file://fixdown GQ}Rxu]
private void fixDown(int k) { vy5I#q(k
int j; :3D[~-/S
while ((j = k << 1) <= size) { cd] X5)$h
if (j < size %26amp;%26amp; queue[j] j++; dTqL[?wH?
if (queue[k]>queue[j]) file://不用交换 xP &@|Ag
break; Y#FSU#a$<
SortUtil.swap(queue,j,k); z8 K#G%,:
k = j; vH@$?b3VP
} 5uU{!JuSa
} E//*bmww
private void fixUp(int k) { 6>b'g ~I
while (k > 1) { uzL|yxt
int j = k >> 1; zLg_0r*h1
if (queue[j]>queue[k]) pIY3ft\
break; ceAefKdb
SortUtil.swap(queue,j,k); Ryn@">sVI
k = j; u?KG%
} +f,I$&d.V
} r@ba1*y0
' wKTWmf?\
} |sBL(9
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} |T{ZDJ+
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SortUtil： iOiXo6YE
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package org.rut.util.algorithm; Z|j\_VKhl
p7[&H/
import org.rut.util.algorithm.support.BubbleSort; 2>.>q9J(
import org.rut.util.algorithm.support.HeapSort; qG0gc\C}
import org.rut.util.algorithm.support.ImprovedMergeSort; GuQ#
import org.rut.util.algorithm.support.ImprovedQuickSort; yn04[PN2
import org.rut.util.algorithm.support.InsertSort; jR{t=da
import org.rut.util.algorithm.support.MergeSort; iBCIJ!;
import org.rut.util.algorithm.support.QuickSort; V,eH E5C
import org.rut.util.algorithm.support.SelectionSort; e)oi3d.wJf
import org.rut.util.algorithm.support.ShellSort; uKo4nXVtp
;(IAhWE?7
/** U!T#'H5'-
* @author treeroot 6e;8\1^
* @since 2006-2-2 kv`5"pa7M
* @version 1.0 sVP2$?
*/ CN7qqd
public class SortUtil { S.^x)5/,,T
public final static int INSERT = 1; uU1q?|4
public final static int BUBBLE = 2; BF U#FE)s
public final static int SELECTION = 3; 8TO5j
public final static int SHELL = 4; Job&qW9W`
public final static int QUICK = 5; EiWd =jDm
public final static int IMPROVED_QUICK = 6; v[>8<z8
public final static int MERGE = 7; %Z(lTvqG
public final static int IMPROVED_MERGE = 8; B9oB5E
public final static int HEAP = 9; {=_xze)
Y4*?QBYA
public static void sort(int[] data) { *'R2Lo<C
sort(data, IMPROVED_QUICK); >IHf5})R
} 0!`!I0
private static String[] name={ eb<'>a
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 0vM,2:kf*
}; ;+Mr|vweTC
Do;rY\sY
private static Sort[] impl=new Sort[]{ IE&G7\>(yO
new InsertSort(), -ha[xM05
new BubbleSort(), 1JN/oq;
new SelectionSort(), k)JwCt.%
new ShellSort(), UbSD?Ew@35
new QuickSort(), IO?6F@(
new ImprovedQuickSort(), ~<[]l~`
new MergeSort(), iPrAB*
new ImprovedMergeSort(), Dz+R Q`Vn
new HeapSort() <(Ktf0'__
}; K|.!)L
[Kd"M[1[<
public static String toString(int algorithm){ *. ; }v@
return name[algorithm-1]; =eG:Scoug?
} &qZ:"k
e6^iakSd.L
public static void sort(int[] data, int algorithm) { sg,9{R ^
impl[algorithm-1].sort(data); XwdehyPhT2
} <(caY37o6)
j(\jYH>
public static interface Sort { O)G^VD s
public void sort(int[] data); 3(La)|k
} on0>_-n)
S|ADu]H(
public static void swap(int[] data, int i, int j) { (+0yZ7AZ
int temp = data; wGnFDkCNz
data = data[j]; u/L\e.4
data[j] = temp; S31+ j:"
} G-sA)WOF
} y&+Sp/6BYA