[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; }^kL|qmjR
} yd_ (?V&;_
int i1=l; K`-!uZW:B7
int i2=mid+1; F7*wQ{~
for(int cur=l;cur<=r;cur++){ #]Y>KX2HG
if(i1==mid+1) mN_Z7n;^eh
data[cur]=temp[i2++]; /RnTQ4
else if(i2>r) X6e/g{S)
data[cur]=temp[i1++]; }hpmO-
else if(temp[i1] data[cur]=temp[i1++]; yV_wDeAz
else '@nbqM
data[cur]=temp[i2++]; LW)H"6v
} V ~{fB~
} cC{"<fYF
:mcYZPX#
} zbkMFD.{y
/iaf ^ >
改进后的归并排序: C~% 1w%nn
s#9Ui#[=h
package org.rut.util.algorithm.support; #U mF-c
}iB|sl2J
import org.rut.util.algorithm.SortUtil; t+uE
(qMj-l
/** _HOIT
* @author treeroot r=.A'"Kf
* @since 2006-2-2 !^c@shLN4
* @version 1.0 b\7iY&.C|
*/ $FTO
public class ImprovedMergeSort implements SortUtil.Sort { 0#o/^Ah
k(VB+k"3
private static final int THRESHOLD = 10; 6A R2htN^
q!~ -(&S
/* *XOJnyC_H
* (non-Javadoc) &EGqgNl
* nk"NmIf
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) (rtY!<|p
*/ h&&6r\4/|
public void sort(int[] data) { *jq7X
int[] temp=new int[data.length]; $g9**b@
mergeSort(data,temp,0,data.length-1); oPf)be| #
} KL,/2(
G"5D< ]
private void mergeSort(int[] data, int[] temp, int l, int r) { B5%n(,Lx
int i, j, k; x\e;+ubt}
int mid = (l + r) / 2; 0fXLcal
if (l == r) ,8'>R@o
return; @D^^_1~
if ((mid - l) >= THRESHOLD) qFX~[h8i+
mergeSort(data, temp, l, mid); U @v*0
else PXoz*)tk
insertSort(data, l, mid - l + 1); :(|'S4z
if ((r - mid) > THRESHOLD) E_z;s3AXQ
mergeSort(data, temp, mid + 1, r); uQ$^;Pr
else #65^w=Sp}
insertSort(data, mid + 1, r - mid); ? 8aaD>OR$
/wShUR{
for (i = l; i <= mid; i++) { eYUr-rN+)z
temp = data; WUc#)EEM)
} {~GYj%-^
for (j = 1; j <= r - mid; j++) { Rgy-OA
temp[r - j + 1] = data[j + mid]; f>o,N{|
} inb^$v
int a = temp[l]; [jdFA<Is
int b = temp[r]; INs!Ame2
for (i = l, j = r, k = l; k <= r; k++) { e1myH6$W
if (a < b) { %VJ85^B3
data[k] = temp[i++]; R:-JkV>e:
a = temp; asiov[o;
} else { 6d[_G$'nk
data[k] = temp[j--]; gU^$Sx7'
b = temp[j]; @:0ddb71
} @!N-RQ&A
} _ZB\L^j)
} Gl %3XdU
%_-zWVJ
/** 9h90huyKF
* @param data #m{{a]zm^
* @param l B5V_e!*5F*
* @param i WF&[HKOy/
*/ ^efb 5
private void insertSort(int[] data, int start, int len) { O%~jop7#6
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); _mvxsG
} v44}%$
} r[(xjn
} Lf([dE1
} G0 J4O!3
c !ZM
堆排序： i@5[FC
HW4.zw
package org.rut.util.algorithm.support; >Iewx Gb>
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import org.rut.util.algorithm.SortUtil; % }|cb7l
{gA\ph%s
/** LTV{{Z+
* @author treeroot ZoB*0H-
* @since 2006-2-2 @$"J|s3M
* @version 1.0 W%2 80\h
*/ V=He_9B
public class HeapSort implements SortUtil.Sort{ XY.5Rno4
@RFs/'
/* (non-Javadoc) \I-#1M
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .roqEasu8
*/ v8gdU7Ll,
public void sort(int[] data) { )Au6Nf
MaxHeap h=new MaxHeap(); "vCM}F
h.init(data); s5.AW8X=?*
for(int i=0;i h.remove(); 5ercD
System.arraycopy(h.queue,1,data,0,data.length); !MDNE*_
} )D'^3)FF
u<q :$
private static class MaxHeap{ X8dR+xd
+;g{$da5
void init(int[] data){ JjpRHw8\
this.queue=new int[data.length+1]; n%R;-?*v
for(int i=0;i queue[++size]=data; g*)K/Z0pJ$
fixUp(size); u~ ~R9.
} M/?KV9Xk2
} 9odJr]
KIA 2"KbjG
private int size=0; J89Dull
@~<j&FTT
private int[] queue; & gJV{V5Ay
)b<k#(i@#
public int get() { =1I#f
return queue[1]; 50TA:7
} ~U(,TjJb
{e|*01hE
public void remove() { .6O"| Mqb
SortUtil.swap(queue,1,size--); o-xDh7v
fixDown(1); gj\)CBOv
} q#Zs\PD
file://fixdown ZvYLL{>}w
private void fixDown(int k) { QB:i/9
int j; 4k/VBZB
while ((j = k << 1) <= size) { E3@QI?n^^
if (j < size %26amp;%26amp; queue[j] j++; {mWui9 %M
if (queue[k]>queue[j]) file://不用交换 }>^Q'BW;65
break; *19ax&|*S
SortUtil.swap(queue,j,k); < v]3g
k = j; <R%;~){
} 6Ao%>;e*
} LA_3=@2.H
private void fixUp(int k) { JGC=(;
while (k > 1) { *`j-i
int j = k >> 1; _A<u#.yd
if (queue[j]>queue[k]) }?cGf-c
break; tt%MoQ)
SortUtil.swap(queue,j,k); ;fw1
k = j; BR'I+lQ
} ,BFE=:ZIK
} !zPG?q]3
"dR|[a<#g
} $M_x!f'{>
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} -~eJn'W
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SortUtil： 1Z[/KJ
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package org.rut.util.algorithm; ;})5:\h
7'wS\/e4a
import org.rut.util.algorithm.support.BubbleSort; Qr1e@ =B
import org.rut.util.algorithm.support.HeapSort; ZpUCfS)|&
import org.rut.util.algorithm.support.ImprovedMergeSort; j8|g!>Nv
import org.rut.util.algorithm.support.ImprovedQuickSort; w ;daC(:
import org.rut.util.algorithm.support.InsertSort; hYQ_45Z*?
import org.rut.util.algorithm.support.MergeSort; *A}cL
import org.rut.util.algorithm.support.QuickSort; TF2>4 p
import org.rut.util.algorithm.support.SelectionSort; kc7lc|'z
import org.rut.util.algorithm.support.ShellSort; mzQ`N}]T:
b}T6v
/** 8 #ndFpu
* @author treeroot LPG`^SA
* @since 2006-2-2 %{3 aW>yx
* @version 1.0 awvDe
*/ nR4y`oP+
public class SortUtil { :{NC-%4o0
public final static int INSERT = 1; <Sz52Suh>
public final static int BUBBLE = 2; h' !imQ
public final static int SELECTION = 3; \%sVHt`c
public final static int SHELL = 4; ,>t69 Ad
public final static int QUICK = 5; t_ksvWUo
public final static int IMPROVED_QUICK = 6; _k^0m
public final static int MERGE = 7; Q]rD}Ckv-
public final static int IMPROVED_MERGE = 8; >5R<;#8
public final static int HEAP = 9; J$~<V IX
_U;eN|Ww
public static void sort(int[] data) { "cTncL
sort(data, IMPROVED_QUICK); [-&L8Un
} )1g"?]
private static String[] name={ fN"(mW>!
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 0y&I/2
}; qO`)F8
tpy>OT$
private static Sort[] impl=new Sort[]{ 6#j$GH *
new InsertSort(), $3Z-)m
new BubbleSort(), 7PR#(ftz
new SelectionSort(), B?$ "\;&
new ShellSort(), m/NdJMoN=
new QuickSort(), JQ:Ri
new ImprovedQuickSort(), E;21?`x5
new MergeSort(), #,{+3Y&5-+
new ImprovedMergeSort(), ^m_yf|D$
new HeapSort() nm7;ieMfr
}; H:p Z-v*
fYE(n8W3
public static String toString(int algorithm){ /6O??6g
return name[algorithm-1]; 1FtM>&%4
} uxg9yp@|
X0-IRJ[
public static void sort(int[] data, int algorithm) { dD<fn9t
impl[algorithm-1].sort(data); lnE+Au'
} -@>BHC
< j$#9QQ1
public static interface Sort { "RVcA",
public void sort(int[] data); DO7W}WU
} ~OePpa\
u*
public static void swap(int[] data, int i, int j) { azjEq$<M
int temp = data; y2O4I'/5<
data = data[j]; (Qgde6
data[j] = temp; 2xw6 5z
} <8UYhGK
} iYnEwAoN;