[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; c8RJOc4X
} em$pU*`P
int i1=l; y_]+;%w:
int i2=mid+1; %u -x9
for(int cur=l;cur<=r;cur++){ I.2J-pu}
if(i1==mid+1) |{jT+
data[cur]=temp[i2++]; bF)G+IH
else if(i2>r) /zn=AAYb
data[cur]=temp[i1++]; o5<<vvdA
else if(temp[i1] data[cur]=temp[i1++]; ~(5r+Z}*`
else 2G8pDvBr
data[cur]=temp[i2++]; SC{m@
} !3v&+Jrf6
} (~T*yH ~
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} DSGcxM+
)G? qX.D
改进后的归并排序: p{FI_6db
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package org.rut.util.algorithm.support; 5=dL`
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import org.rut.util.algorithm.SortUtil; <=uYfi3,
vdQoJWuB
/** S}m_XR]
* @author treeroot enoj4g7em^
* @since 2006-2-2 1I+9?fa
* @version 1.0 2|1fb-AR
*/ vDy&sgS$<
public class ImprovedMergeSort implements SortUtil.Sort { p7h#.m~Qu
5~Y`ikwxL
private static final int THRESHOLD = 10; hy;VvAH5
IRdt:B|@
/* !_S>ER
* (non-Javadoc) V5|ANt
* [U\?+@E*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) D}-.<
*/ >.h:Y5
public void sort(int[] data) { ,Z.sGv
int[] temp=new int[data.length]; BHXi g~d
mergeSort(data,temp,0,data.length-1); jm_-f
} )P$(]{
8fR(y~_gF
private void mergeSort(int[] data, int[] temp, int l, int r) { %+7]/_JO&
int i, j, k; @KG0QHyiU
int mid = (l + r) / 2; 8~=*\ @^
if (l == r) y(A' *G9
return; \-<BUG]=
if ((mid - l) >= THRESHOLD) "gM^o
mergeSort(data, temp, l, mid); '<Z[e`/
else xO$P C,
insertSort(data, l, mid - l + 1); |<%!9Z
if ((r - mid) > THRESHOLD) Bqx5N"
mergeSort(data, temp, mid + 1, r); 8h)XULs2
else cHFi(K]|1
insertSort(data, mid + 1, r - mid); R>' %}|v/
MB plhVK8
for (i = l; i <= mid; i++) { 8hRcB[F~S
temp = data; #-hO\ QdC
} *kr/,_K
for (j = 1; j <= r - mid; j++) { K^-1M?
temp[r - j + 1] = data[j + mid]; 50UdY9E_v}
} %36x'Dn?
int a = temp[l]; OvdT* g=8*
int b = temp[r]; P rt} 01$
for (i = l, j = r, k = l; k <= r; k++) { Sb.8d]DW
if (a < b) { AerU`^
data[k] = temp[i++]; >J"INI
a = temp; J3$>~?^1
} else { f^c+M~\JKj
data[k] = temp[j--]; kmB!NxF>)F
b = temp[j]; CB@7XUR
} JJ.8V72;!Z
} W{p}N
} xm'9n?
Bous d
/** 0^;2
* @param data Kg@'mG
* @param l jm0p%%z
* @param i 1/_g36\l$
*/ %idBR7?`g
private void insertSort(int[] data, int start, int len) { wjarQog5Y
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); P5S]h
} $:ush"=f8^
} J8|MK.oD
} Daf|.5>(@
} sJHVnMA
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堆排序： }nx)|J*p
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package org.rut.util.algorithm.support; |OQ]F
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import org.rut.util.algorithm.SortUtil; $ {yct
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/** Y$'j9bUJ
* @author treeroot bQ<qdGa
* @since 2006-2-2 <'y<8gpM
* @version 1.0 g?j)p y
*/ m*0YMS>Y |
public class HeapSort implements SortUtil.Sort{ 7vRtTP
C=D*
/* (non-Javadoc) w,{h9f
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 6jE.X
*/ &OR(]Wt0
public void sort(int[] data) { {UNH?2
MaxHeap h=new MaxHeap(); LG}{ibB
h.init(data); kR]P/4r
for(int i=0;i h.remove(); dwj?;
System.arraycopy(h.queue,1,data,0,data.length); |k a _Zy
} TykT(=
&AiAd6
private static class MaxHeap{ m$0W^u
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void init(int[] data){ CTMC78=9}
this.queue=new int[data.length+1]; Nc[@QC{
for(int i=0;i queue[++size]=data; -FeXG#{)
fixUp(size); <z Gh}.6v
} Z0gtliJ@
} U%3N=M
p1N}2]e
private int size=0; [6GYYu\
dPUe5k)G_
private int[] queue; y^2#;0W
KsDS!O
public int get() { _!xrBdaJ
return queue[1]; h nydH-;cz
} /9vi
ZmK=8iN9J
public void remove() { |Xt G9A>
SortUtil.swap(queue,1,size--); S-t#d7'B
fixDown(1); y r (g/0
} @ @[xTyA
file://fixdown y)kxR
private void fixDown(int k) { @yp0WB
int j; 4o>y9
while ((j = k << 1) <= size) { `_/bg(E
if (j < size %26amp;%26amp; queue[j] j++; \o<ucp\J
if (queue[k]>queue[j]) file://不用交换 -^&=I3bp
break; Gxr\a2Z&r%
SortUtil.swap(queue,j,k); 96WzgHPWo
k = j; PD#,KqL:
} d$IROZK-D
} 0X)vr~`
private void fixUp(int k) { @3`5(xwzm
while (k > 1) { Dka,v
int j = k >> 1; ^'3c%&Zf3
if (queue[j]>queue[k]) *g5bdQ:Av~
break; OG$n C
SortUtil.swap(queue,j,k); }:8}i;#M
k = j; D e&,^"%
} "GMU~594
} ly[yn{
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} A6(Do]M
M0 z%<_<}
} 0/HFLz'
/@:X0}L
SortUtil： i'fw>-0
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package org.rut.util.algorithm; I`_2Q:r
F ~A$7
import org.rut.util.algorithm.support.BubbleSort; ]B>76?2W
import org.rut.util.algorithm.support.HeapSort; t6Iy5)=zY
import org.rut.util.algorithm.support.ImprovedMergeSort; t/|0"\ p
import org.rut.util.algorithm.support.ImprovedQuickSort; ]zx%"SUM
import org.rut.util.algorithm.support.InsertSort; /2Izj/Q
import org.rut.util.algorithm.support.MergeSort; ^E}?YgNp
import org.rut.util.algorithm.support.QuickSort; I\*6 >
import org.rut.util.algorithm.support.SelectionSort; qU26i"GHp
import org.rut.util.algorithm.support.ShellSort; k^ <]:B
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/** BX/3{5Y>{
* @author treeroot WK|5:V8E
* @since 2006-2-2 ]SJ#:7
* @version 1.0 W.3b]zcV
*/ O)jD2X?
public class SortUtil { `r$7Cc$C
public final static int INSERT = 1; >XtfT'
public final static int BUBBLE = 2; W&5/1``u\
public final static int SELECTION = 3; L[<#>/NPy
public final static int SHELL = 4; ,HP }}K+S
public final static int QUICK = 5; o`f^m
public final static int IMPROVED_QUICK = 6; ?NwrdcQ
public final static int MERGE = 7; hs7!S+[.$$
public final static int IMPROVED_MERGE = 8; }y6)d.
public final static int HEAP = 9; 44KoOY_
& /8Tth86
public static void sort(int[] data) { 'K4FS(q
sort(data, IMPROVED_QUICK); TuQGF$n@
} h0<PQZJ
private static String[] name={ xhP~]akHN7
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" vAX(3
}; ]5'$EAsuW
Mj;V.Y
private static Sort[] impl=new Sort[]{ -,bnj^L
new InsertSort(), #gbB// <
new BubbleSort(), [6a-d>e{
new SelectionSort(), +gd5&
new ShellSort(), 3en9TB
new QuickSort(), :|;@FkQ
new ImprovedQuickSort(), coAXYn
new MergeSort(), lp}S'^ y
new ImprovedMergeSort(), _v&fIo
new HeapSort() ZA="Dac
}; 9rEBq&
2j+w5KvU
public static String toString(int algorithm){ 9[/0
return name[algorithm-1]; s70Z&3A
} +Kk1[fh-
'?C6P5fm
public static void sort(int[] data, int algorithm) { yX!u&
impl[algorithm-1].sort(data); t^'nh 1=
} M">v4f&K1!
k ]NZ%.
public static interface Sort { -m@c{&r
public void sort(int[] data); DZ|*hQU>K
} `N\ ^JAGW
pyhXET '
public static void swap(int[] data, int i, int j) { }r,M(Zr
int temp = data; [e><^R*u
data = data[j]; 5e7YM@ng
data[j] = temp; 3%*igpj\)
} %"`p&aE:
} 7.29'