[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; 3 SQ_9{
} OX?9 3AlG
int i1=l; >29eu^~nh
int i2=mid+1; X!n-nms
for(int cur=l;cur<=r;cur++){ Kk~0jP_B9
if(i1==mid+1) U"xI1fg%b
data[cur]=temp[i2++]; Z8=4cWI~;
else if(i2>r) [j5^Zb&0
data[cur]=temp[i1++]; V&_5q`L
else if(temp[i1] data[cur]=temp[i1++]; I@ch 5vl4
else (*%+!PS
data[cur]=temp[i2++]; u+zq:2)H6
} [pmZ0/l
} P,O9On
KW.S)+<H&
} s&lZxnIjc
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改进后的归并排序: UG+wRX :dA
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package org.rut.util.algorithm.support; 4kA/W0 VG
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import org.rut.util.algorithm.SortUtil; d*1@lmV*
/ vge@bsE
/** 79a{Zwdd9j
* @author treeroot Ah &D5,3
* @since 2006-2-2 QH4nb h4
* @version 1.0 )E^4\3^:
*/ Ckvm3r\i2
public class ImprovedMergeSort implements SortUtil.Sort { mB#`{|1[
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private static final int THRESHOLD = 10; Vd|5JA}<"
X63DBF4A
/* >U9!KB
* (non-Javadoc) LIVVb"V|,
* /PIU@$DV
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) A"C%.InZ
*/ :f^O!^N
public void sort(int[] data) { 1`m ~c
int[] temp=new int[data.length]; B\}E v&
mergeSort(data,temp,0,data.length-1); W?'!}g(~
} x-U^U.i@
bs]ret$?(q
private void mergeSort(int[] data, int[] temp, int l, int r) { 5\f*xY
int i, j, k; qB7.LR*'
int mid = (l + r) / 2; DSy,#yA
if (l == r) /Yx 1S'5
return; mxQS9y
if ((mid - l) >= THRESHOLD) s+^o[R T3
mergeSort(data, temp, l, mid); >lyUr*4PX
else mb?DnP,z
insertSort(data, l, mid - l + 1); i2$U##-ro]
if ((r - mid) > THRESHOLD) d Z"bc]z{
mergeSort(data, temp, mid + 1, r); vUgLWd
else {TdKS
insertSort(data, mid + 1, r - mid); 6yTL7@V|B
CQ"IL;y
for (i = l; i <= mid; i++) { GwwxSB&y
temp = data; gA!-F}x$
} &6MGPh7T
for (j = 1; j <= r - mid; j++) { N"T~U\R
temp[r - j + 1] = data[j + mid]; _:M6~XHo
} pLBp[GQ
int a = temp[l]; J*,Ed51&7
int b = temp[r]; c1CP12
for (i = l, j = r, k = l; k <= r; k++) { Z5-"a?{Y
if (a < b) { $}OU~d1q
data[k] = temp[i++]; 0c7&J?"wE
a = temp; &N*S
} else { 0wZLkU_(
data[k] = temp[j--]; DZ ~|yH
b = temp[j]; 5HL JkOV5
} h:#
} .rG Rdb
} Ua V9T:)x
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/** /n?5J`6
* @param data **-%5~
* @param l ?$;_a%v6
* @param i cGsxfwD
*/ 6l [TQ
private void insertSort(int[] data, int start, int len) { x7Ly,
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); zmf5!77
} A>OL5TCl
} xJ>hN@5}i
} c2?(.UV
} 52l|
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堆排序： Zi@?g IiX
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package org.rut.util.algorithm.support; *-_` xe
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import org.rut.util.algorithm.SortUtil; qg:1
in#qV
/** na $z\C\
* @author treeroot vT%rg r
* @since 2006-2-2 kc|`VB8L
* @version 1.0 vCbqZdy?
*/ A[ /0on5r
public class HeapSort implements SortUtil.Sort{ '4dnC2a]
$hndb+6q
/* (non-Javadoc) !&SUoa
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <B$Lu4b@c
*/ 9S&6u1
public void sort(int[] data) { Mk|h ><Q"
MaxHeap h=new MaxHeap(); '$1-A%e$1
h.init(data); %>xW_5;Z
for(int i=0;i h.remove(); .b N0!
System.arraycopy(h.queue,1,data,0,data.length); 8dIgw
} i]hFiX
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private static class MaxHeap{ wc~a}0uz
[ "J
void init(int[] data){ l+R-lsj
this.queue=new int[data.length+1]; uA:;OM}
for(int i=0;i queue[++size]=data; N<Y-]xS
fixUp(size); :7:Nx`D8
} 1;vn*w`p
} @%ChPjN
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private int size=0; B`RbXk68q
1/gY]ghL
private int[] queue; WF*2^iWJ
OYG8%L
public int get() { 7gD$Q
return queue[1]; z>~`9Qiw'
} S:rW}rJ
RFg$N@g,
public void remove() { O+.V,`O
SortUtil.swap(queue,1,size--); 4d0PW#97.
fixDown(1); wGnjuIR
} 3iH!;`i
file://fixdown `j4ukOnG
private void fixDown(int k) { C&<f YCwG
int j; OX|/yw8
while ((j = k << 1) <= size) { Eto0>YyZ
if (j < size %26amp;%26amp; queue[j] j++; 4vBZb^W;9
if (queue[k]>queue[j]) file://不用交换 Z9=Cw0( w?
break; Lk#u^|Eq7=
SortUtil.swap(queue,j,k); Xb$)}n\9
k = j; ~+3f8%
} 6<]&T lS]
} vhWj_\m
private void fixUp(int k) { I+`~6
while (k > 1) { Cd|V<BB9
int j = k >> 1; v{?9PRf\s
if (queue[j]>queue[k]) z?j~ 2K<4
break; I|Z5*iXqCm
SortUtil.swap(queue,j,k); fB
k = j; @f*/V e0.
} 5IdmKP|
} nV:.-JR
.o|Gk 5)
} Y&'2/zI6~
Q9%N>h9
} VD36ce9
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SortUtil： <0R?#^XBZB
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package org.rut.util.algorithm; : ]CZS
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import org.rut.util.algorithm.support.BubbleSort; >L&>B5)9
import org.rut.util.algorithm.support.HeapSort; Sw'DS
import org.rut.util.algorithm.support.ImprovedMergeSort; $`l- cSH;
import org.rut.util.algorithm.support.ImprovedQuickSort; Q$kSK+ q!
import org.rut.util.algorithm.support.InsertSort; ,"j|0Q
import org.rut.util.algorithm.support.MergeSort; .O1g'%
import org.rut.util.algorithm.support.QuickSort; 8{Zgvqbb
import org.rut.util.algorithm.support.SelectionSort; Q*mPU=<
import org.rut.util.algorithm.support.ShellSort; a&XURyp
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/** ,p$1n;
* @author treeroot >K50 h
* @since 2006-2-2 !^l<jrM
* @version 1.0 g%4|vA8
*/ 5'l+'ox@J
public class SortUtil { Rq4\~F?
public final static int INSERT = 1; $ZQPf
public final static int BUBBLE = 2; #FuOTBNvB
public final static int SELECTION = 3; 0_"J>rMp
public final static int SHELL = 4; l6l)M
public final static int QUICK = 5; x,>@IEN7
public final static int IMPROVED_QUICK = 6; zpg*hlv
public final static int MERGE = 7; 3TtnLay.k
public final static int IMPROVED_MERGE = 8; H~||]_q|
public final static int HEAP = 9; [0MVsc=
*QAK9mc
public static void sort(int[] data) { Z[0xqGYLB
sort(data, IMPROVED_QUICK); Qs;bVlp!H
} !Otyu6&
private static String[] name={ #[I`VA\x
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" (q:L_zFj>"
}; mI"|^!L
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private static Sort[] impl=new Sort[]{ ~Qzm!Po,
new InsertSort(), 'Ur$jW
new BubbleSort(), )W*S6}A
new SelectionSort(), [[[p@d/Y
new ShellSort(), n!3_%K0!r&
new QuickSort(), -f Zm_FE
new ImprovedQuickSort(), B[cZEFo\
new MergeSort(), 4\Q ?4ZX
new ImprovedMergeSort(), ']}ZI 8
new HeapSort() aQinR"o
}; g w}t.3}
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public static String toString(int algorithm){ 70|Cn(p_
return name[algorithm-1]; RUO,tB|(_;
} 6I_W4`<VeZ
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public static void sort(int[] data, int algorithm) { ->K*r\T
impl[algorithm-1].sort(data); 4V<s"
} X<Vko^vlj
Qy@chN{eP
public static interface Sort { AX]lMe
public void sort(int[] data); wm8(Ju
} P"3{s+ r
<A"}Krq?
public static void swap(int[] data, int i, int j) { Ds0^/bYp&
int temp = data; Cd6^aFoK!
data = data[j]; LA"`8
data[j] = temp; U.?,vw'aai
} 7M^!t X
} ;wTl#\|w0