[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; .TMLg(2hgv
} bwM?DY
int i1=l; :8K}e]!c1
int i2=mid+1; PYBE?td
for(int cur=l;cur<=r;cur++){ 2E8G5?qe)
if(i1==mid+1) @U3:9~Q
data[cur]=temp[i2++]; @R-11wP)M
else if(i2>r) ZNVrja*
data[cur]=temp[i1++]; qJ sH
else if(temp[i1] data[cur]=temp[i1++]; -Bl]RpHCe
else It7R}0Smg
data[cur]=temp[i2++]; tr5j<O
} SRtw
} k".kbwcaF
(dfC}x(3h
} TjDtNE
'hE'h?-7
改进后的归并排序: IyI0|&r2A
1fvN[
package org.rut.util.algorithm.support; PB *v45
j]FK.G'
import org.rut.util.algorithm.SortUtil; g<@Q)p*ow
GE`1j'^-
/** N]eBmv$|
* @author treeroot 3&>0'h
* @since 2006-2-2 Y)@Y$_
* @version 1.0 EK= y!>
*/ 06O_!"GD}
public class ImprovedMergeSort implements SortUtil.Sort { |h}4J
Nc&J%a
private static final int THRESHOLD = 10; %3O))Ug5
J%-4ZB"
/* m}u)C&2>
* (non-Javadoc) q}+zNeC
* %ufh
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) NT0n[o^
*/ N8pV[\f
public void sort(int[] data) { .XqeO@z
int[] temp=new int[data.length]; HMC-^4\%[
mergeSort(data,temp,0,data.length-1); ^B0Qk:%P^N
} WW.@&#S5
_P=+\[|y
private void mergeSort(int[] data, int[] temp, int l, int r) { jz`3xFy *]
int i, j, k; 7Q]c=i cg
int mid = (l + r) / 2; `LNhamp
if (l == r) iGSA$U P|
return; Y/6>OD
if ((mid - l) >= THRESHOLD) `!t-$i
mergeSort(data, temp, l, mid); :_y!p
else Q?;Tc.O"/
insertSort(data, l, mid - l + 1); V*ao@;sD
if ((r - mid) > THRESHOLD) 76"4Q!
mergeSort(data, temp, mid + 1, r); r<vy6
else `3i<jZMG
insertSort(data, mid + 1, r - mid); [zBi*%5O
O^3kPVr
for (i = l; i <= mid; i++) { ]+46r!r|
temp = data; (:qc[,m
} r88De=*
for (j = 1; j <= r - mid; j++) { `<yQ`Y_X
temp[r - j + 1] = data[j + mid]; I ^m
} L-}J=n\
int a = temp[l]; 5wmd[YL
int b = temp[r]; #GLW3}
for (i = l, j = r, k = l; k <= r; k++) { ,% QhS5e
if (a < b) { t[J=8rhER
data[k] = temp[i++]; oz>2P.7
a = temp; Q&N#q53
} else { :IU7dpwDl
data[k] = temp[j--]; #gqh0 27
b = temp[j]; (5 @H
} ;xe.0j0h
} BO#tn{(#
} yw$4Hlj5
* eC[74Kng
/** MW6z&+Z
* @param data +^lB"OcOX@
* @param l ?WHf%Ie2(
* @param i #H w(w
*/ cLl~4jL
private void insertSort(int[] data, int start, int len) { u*v<dsGQ
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); =V]0G,,\
} 7dcR@v`c
} *s*Y uY%y
} \?>M?6D
} IC&P-X_aP
^e_LnJ+
堆排序： i? ~-%
n'v\2(&uYN
package org.rut.util.algorithm.support; -z~!%4a
Ac|\~w[\
import org.rut.util.algorithm.SortUtil; cd1G.10
R8k4?_W?T
/** R__:~uv,
* @author treeroot }1e4u{
* @since 2006-2-2 UPU$SZAIx
* @version 1.0 }VZExqm)
*/ itP`{[
public class HeapSort implements SortUtil.Sort{ jZzTnmm&?
1'\QD`M9^
/* (non-Javadoc) N"G aQ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) q50F!yHC-
*/ 2^=.j2
public void sort(int[] data) { z'"7zLQ
MaxHeap h=new MaxHeap(); qEr?4h
h.init(data); 4lB??`UN
for(int i=0;i h.remove(); /W$i8g
System.arraycopy(h.queue,1,data,0,data.length); =&}_bd/]
} /j$=?Rp
D<;~eZ'
private static class MaxHeap{ <;S$4tux
![^pAEgx
void init(int[] data){ YND}P9 h
this.queue=new int[data.length+1]; bsF_.S*k@
for(int i=0;i queue[++size]=data; bu|.Jw"
fixUp(size); zo(#tQ-'m
} |MFAP!rycS
} Sy|GM~
4MzQH-U>/
private int size=0; h9)fXW
%`yfi+e
private int[] queue; WHY/x /$
B={_}f
public int get() { Q2VF+g,
return queue[1]; o=3hWbe
} n?.;*:
W~/d2_|/
public void remove() { CpO_p%P
SortUtil.swap(queue,1,size--); >MHlrSH2
fixDown(1); mkn1LzE|F
} j4?Qd0z
file://fixdown kun/KY
private void fixDown(int k) { &rBe -52
int j; FAEF
while ((j = k << 1) <= size) { ]8\I{LR
if (j < size %26amp;%26amp; queue[j] j++; s2{SbOBis
if (queue[k]>queue[j]) file://不用交换 Ev5~= ]
break; Nnl3r@
SortUtil.swap(queue,j,k); 25)9R^
k = j; TC?B_;a
} P9bM+@5e
} X ha9x,
private void fixUp(int k) { I "AjYv4R
while (k > 1) { ^m w]u"5\
int j = k >> 1; v.Ba
if (queue[j]>queue[k]) Q?k*3A
break; {R!yw`#^B
SortUtil.swap(queue,j,k); 6P1s*u
k = j; 2'Dl$DH
} HrBJi
} a/j;1xcc<
-`~qmRpqY
} Cg): Q8
Af;Pl|Zh[
} L/"};VI
={O ~
SortUtil： 7y'":1
R&Y_
package org.rut.util.algorithm; < '5~p$
HY)xT$/J
import org.rut.util.algorithm.support.BubbleSort; <:v+<)K
import org.rut.util.algorithm.support.HeapSort; 8%7%[WC#
import org.rut.util.algorithm.support.ImprovedMergeSort; KS$t
import org.rut.util.algorithm.support.ImprovedQuickSort; _6NUtU
import org.rut.util.algorithm.support.InsertSort; K3?5bT_{
import org.rut.util.algorithm.support.MergeSort; ^3$l!>me
import org.rut.util.algorithm.support.QuickSort; qH}8TC
import org.rut.util.algorithm.support.SelectionSort; <kK>C8+
import org.rut.util.algorithm.support.ShellSort; 7AV{ h[J
2tq2
/** uQ5h5Cfz
* @author treeroot -F~DOG%
* @since 2006-2-2 d.wGO]"
* @version 1.0 %":3xj'EEI
*/ IL].!9
public class SortUtil { Z+El(f x
public final static int INSERT = 1; h<G4tjtk
public final static int BUBBLE = 2; {]HiTpn
public final static int SELECTION = 3; _Op%H)
public final static int SHELL = 4; &kg^g%%
public final static int QUICK = 5; _!03;zrO
public final static int IMPROVED_QUICK = 6; kv:9Fm\$
public final static int MERGE = 7; 0^ODJ7
public final static int IMPROVED_MERGE = 8; fu"cX;
public final static int HEAP = 9; kamQZzPe
)d2Z g
public static void sort(int[] data) { SyvoN,;Q
sort(data, IMPROVED_QUICK); PM\Ju]
} 0|P=S|%~
private static String[] name={ FU3K?A B
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" .k,j64 r
}; c{MoeIG)v@
V?u#WJy/
private static Sort[] impl=new Sort[]{ d&#_t@%
new InsertSort(), v~nKO?{
new BubbleSort(), E\[BE<y
new SelectionSort(), 3oCI1>k
new ShellSort(), *G58t`]r
new QuickSort(), ${ {4L?7
new ImprovedQuickSort(), +U oNJ
new MergeSort(), YXA@ c
new ImprovedMergeSort(), *)RmX$v3
new HeapSort() ;kgP:n
}; 2)f_L|o,m
_?c.m*)A
public static String toString(int algorithm){ VgHO&vU
return name[algorithm-1]; 'c35%?]
} Z.\q$U7'9
<0CjEsAB]
public static void sort(int[] data, int algorithm) { NHd@s#@
impl[algorithm-1].sort(data); KL&/Yt
} 2*NPK}
Rt8[P6e"q
public static interface Sort { B.8B1MFm
public void sort(int[] data); #J[g r_
} C`.YOkpj
nrl?<4_
public static void swap(int[] data, int i, int j) { ,h*gd^i
int temp = data; N*Aw-\Bk
data = data[j]; |qNe_)
data[j] = temp; .|,LBc!
} >tM4|w|
} @;/Pl>$|'G