[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; \~
} RU`TzD
int i1=l; FFgy=F
int i2=mid+1; Jz#ZDZkm
for(int cur=l;cur<=r;cur++){ s8``U~D
if(i1==mid+1) is}Fy>9i
data[cur]=temp[i2++]; rr4yJ;qpeP
else if(i2>r) e<^tY0rR&
data[cur]=temp[i1++]; 0nAeeVz|
else if(temp[i1] data[cur]=temp[i1++]; Iw"?%k\U
else 2|~&x~
data[cur]=temp[i2++]; ?<w +{
} "VWxHRVg4M
} s=huOjKL]
k#%19B
} |y%pP/;&!
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改进后的归并排序: YKh%`Y1<
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package org.rut.util.algorithm.support; !00%z
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import org.rut.util.algorithm.SortUtil; i=2+1;K
#U/B,`= >
/** 2$NP46z}
* @author treeroot RpLm'~N'
* @since 2006-2-2 q@(N 38D
* @version 1.0 W,agPG\+
*/ j7-#">YL
public class ImprovedMergeSort implements SortUtil.Sort { }qz58]fyx
;T52aX
private static final int THRESHOLD = 10; .: 7h=neEW
7*XG]=z/
/* nTu"
* (non-Javadoc) oS_p/$F,
* <R{\pz2w
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /gFyow1W
*/ 6}ax~wYct
public void sort(int[] data) { uR"]w7=
int[] temp=new int[data.length]; +[2lS54"W4
mergeSort(data,temp,0,data.length-1); `bC_J,>_
} u gfV'
Q}2w~Cn\S
private void mergeSort(int[] data, int[] temp, int l, int r) { vJq`l3&
int i, j, k; jv0e&rt
int mid = (l + r) / 2; >8NQ8i=]V1
if (l == r) 5. l&nt'
return; q>omCk%h
if ((mid - l) >= THRESHOLD) |J}~a8o
mergeSort(data, temp, l, mid); #3CA
else hV8A<VT
insertSort(data, l, mid - l + 1); Pq4sv`q)S
if ((r - mid) > THRESHOLD) SyYa_=En
mergeSort(data, temp, mid + 1, r); _ve7Is`/
else -`?V8OwY]
insertSort(data, mid + 1, r - mid); 'ZDa*9nkF
eB]ZnJ2^=
for (i = l; i <= mid; i++) { E0oJ|My
temp = data; ^$#Q_Y|
} ac&tpvij
for (j = 1; j <= r - mid; j++) { 2=3iA09px
temp[r - j + 1] = data[j + mid]; L:^'cl} G
} Vk_L*lcN
int a = temp[l]; #-VKk
int b = temp[r]; vRY4N{v(<
for (i = l, j = r, k = l; k <= r; k++) { uPp(l4(+
if (a < b) { ohh 1DsB
data[k] = temp[i++]; OQsH,'
a = temp; cALu
} else { 3> fuH'=
data[k] = temp[j--]; ja>Tnfu
b = temp[j]; [D?E\Nkk
} er<~dqZ}]
} (Pu*[STTT
} G/`_$ c
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/** k<f*ns
* @param data i/Hi
* @param l (^Ln|3iz
* @param i -zTeIvcy5
*/ )t.q[O`
private void insertSort(int[] data, int start, int len) { >ab=LDoM
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); :D/R
} #e0+;kBh
} jf2E{48P
} 3~S~)quwP
} O0I/^
,#m\W8j
堆排序： kR_[p._
PRUGUHY
package org.rut.util.algorithm.support; C eg6o&^
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import org.rut.util.algorithm.SortUtil; qj/P4*6E
~\_E%NR yA
/** :dj@i6
* @author treeroot 1h"B-x
* @since 2006-2-2 ~lL($rE
* @version 1.0 SVHtv0Nx
*/ a&<<X:$Hy
public class HeapSort implements SortUtil.Sort{ #*`|}_6L
&,)tD62s
/* (non-Javadoc) :H87x?e[
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :=8vy
*/ RU'J!-w{
public void sort(int[] data) { 1hN! 2Y:
MaxHeap h=new MaxHeap(); _1Eyqh`oh
h.init(data); ls5S9R 5
for(int i=0;i h.remove(); Cm&itG
System.arraycopy(h.queue,1,data,0,data.length); Tv KX8m"
} S,v`rmI
- t+Mh.
private static class MaxHeap{ 'F~u \m=E
B?4\IXek
void init(int[] data){ I F@M
this.queue=new int[data.length+1]; Nf~<xK
for(int i=0;i queue[++size]=data; -Z@p
fixUp(size); O| 2Q- @D
} _Dv^~e1c
} ppYz~ {"r
r3-3*_
private int size=0; i>~?XVU
D'&LwU,o
private int[] queue; %|I|Mc
t Z%?vY~!
public int get() { 4>W`XH
return queue[1]; L9.#/%I\
} izxCbbg
I5~DC
public void remove() { F, "x~C
SortUtil.swap(queue,1,size--); DjKjEZHgM
fixDown(1); Z*)<E)
} y\[=#g1(@
file://fixdown Y:a(y*y<
private void fixDown(int k) { ^#4s/mdVO
int j; x0d+cSw
while ((j = k << 1) <= size) { 'tbb"MEi4
if (j < size %26amp;%26amp; queue[j] j++; 76m[o
if (queue[k]>queue[j]) file://不用交换 YJy*OS_&
break; w9FI*30
SortUtil.swap(queue,j,k); zxh"@j$?
k = j; cm]]9z_<
} gr;M
} NR*SEbUU*
private void fixUp(int k) { >g[W@FhT'k
while (k > 1) { QJ>>&`{,
int j = k >> 1; *t_&im%E
if (queue[j]>queue[k]) =6sXZ"_Tw
break; s:ruCS
SortUtil.swap(queue,j,k); aPC!M4#
k = j; ~g{,W
} )=D&NO67Pq
} b>i=",i\
w#e'K-=
} AUC< m.
>$y >
} FMn&2fH
+@Y[i."^J
SortUtil： +6=!ve}
{OOt+U!
package org.rut.util.algorithm; =(ZGaZ}
0 OBkd
import org.rut.util.algorithm.support.BubbleSort; ~K9U0ypH
import org.rut.util.algorithm.support.HeapSort; .*j+?
import org.rut.util.algorithm.support.ImprovedMergeSort; ;i9CQ0e?
import org.rut.util.algorithm.support.ImprovedQuickSort; a3;.{6el)H
import org.rut.util.algorithm.support.InsertSort; V|AE~R^
import org.rut.util.algorithm.support.MergeSort; 1 XG-O
import org.rut.util.algorithm.support.QuickSort; MjpJAV/84
import org.rut.util.algorithm.support.SelectionSort; Ps7%:|K]
import org.rut.util.algorithm.support.ShellSort; K288&D|1WU
OLrD4 e
/** 9zJ`;1
* @author treeroot %\l,X{X
* @since 2006-2-2 L3AwL)I
* @version 1.0 R*X2Z{n
*/ mw[4<vfB0a
public class SortUtil { +]-KzDsr"V
public final static int INSERT = 1; lIz_0rE
public final static int BUBBLE = 2; ))`Zv=y"
public final static int SELECTION = 3; 9^u?v`!
public final static int SHELL = 4; qN@a<row&~
public final static int QUICK = 5; #E9['JnZ
public final static int IMPROVED_QUICK = 6; >|?T|
public final static int MERGE = 7; $T6Qg(p
public final static int IMPROVED_MERGE = 8; GcR`{ 3hO
public final static int HEAP = 9; {0 ~0
c*dww
public static void sort(int[] data) { 9#<Og>t2y
sort(data, IMPROVED_QUICK); 5-^%\?,x
} 8-:k@W
private static String[] name={ zc+;VtP|8
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" %K"%Qm=Tl
}; u7?juI#Cl
1c#'5~nB
private static Sort[] impl=new Sort[]{ G+uiZ(p>
new InsertSort(), (fa?ftK
new BubbleSort(), Ug21d42Z4
new SelectionSort(), $)Yog]}
new ShellSort(), 3Mx@
new QuickSort(), ]%|WE
new ImprovedQuickSort(), QIK73^
new MergeSort(), /BM1AV{s6
new ImprovedMergeSort(), Nz*sD^SJa
new HeapSort() |Vi&f5p,@
}; "Vq]|j,B/c
4Umsc>yfK
public static String toString(int algorithm){ aLi_Hrb9
return name[algorithm-1]; Z~c'h
} M"^Vf{X^
;YDF*~9u
public static void sort(int[] data, int algorithm) { v9U(sEDq
impl[algorithm-1].sort(data); 6;cY!
} V=&,^qZ
abeSkWUL(
public static interface Sort { Jwd&[ O
public void sort(int[] data); T-C#xmY(
} toqzS!&.v
.dT;T%3fO
public static void swap(int[] data, int i, int j) { xGfDz*t
int temp = data; 87KrSZ
data = data[j]; c^O#O
data[j] = temp; Cc)P5\jh
} *O>aqu
} UglG!1L