[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; 49$<:{~
} 7upko9d/
int i1=l; h@!p:]
int i2=mid+1; hx$61E=
for(int cur=l;cur<=r;cur++){ :Kwu{<rJ!(
if(i1==mid+1) :^v Q4/,
data[cur]=temp[i2++]; C,Nf|L((6
else if(i2>r) %+N]$Q
data[cur]=temp[i1++]; Pc`d]*BYi
else if(temp[i1] data[cur]=temp[i1++]; )Y7H@e\1
else VAz4@r7hkq
data[cur]=temp[i2++]; LV^^Bd8Ct
} v$|~ g'6
} 3SP";3+
:*M?RL@j
} 30!DraW8
(WyNO QO'
改进后的归并排序: e~N&?^M
fRQ,Z
package org.rut.util.algorithm.support; 0\P5=hD)K
>.d/@3 '
import org.rut.util.algorithm.SortUtil; b0{i +R
?<EzILM
/** si]VM_w6
* @author treeroot nn_O"fZi
* @since 2006-2-2 ]?tRO
* @version 1.0 =9GALoGL
*/ Q&eyqk
public class ImprovedMergeSort implements SortUtil.Sort { :o>=^N
E EDFyZ
private static final int THRESHOLD = 10; Y 3BJ@sqz
$3^M-w
/* \yr9j$
* (non-Javadoc) Lt't
* N}?|ik
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ^v'kEsE^*
*/ -G~]e6:zD
public void sort(int[] data) { 4XjwU`
int[] temp=new int[data.length]; wtTy(j,9
mergeSort(data,temp,0,data.length-1); .h-mFcjy
} FvpU]
/?'~`4!(
private void mergeSort(int[] data, int[] temp, int l, int r) { Zv;nY7B
int i, j, k; h;gc5"mG
int mid = (l + r) / 2; }=[p>3Dd
if (l == r) /iU<\+ H
return; TTz=*t+D
if ((mid - l) >= THRESHOLD) ]y_:+SHc
mergeSort(data, temp, l, mid); Z-PBCU
else '~D4%WKT
insertSort(data, l, mid - l + 1); $0_K&_5w~
if ((r - mid) > THRESHOLD) JU?;Kq9R
mergeSort(data, temp, mid + 1, r); .9nqJ7]
else yE8D^M|g
insertSort(data, mid + 1, r - mid); !kovrvM6F
.xJ54Vz
for (i = l; i <= mid; i++) { K%v:giN$l`
temp = data; D$hQ-K
} J:@gmo`M;V
for (j = 1; j <= r - mid; j++) { )D+BvJ Y"
temp[r - j + 1] = data[j + mid]; $ZM'dIk?
} 4z0gyCAC A
int a = temp[l]; .l1x~(
int b = temp[r]; ?+t;\
for (i = l, j = r, k = l; k <= r; k++) { ys9:";X;}
if (a < b) { >dl5^
data[k] = temp[i++]; F1#{(uW
a = temp; q`*.F#/4c
} else { |[?Otv
data[k] = temp[j--]; ieZ$@3#&z
b = temp[j]; {rc3`<%
} jJ#D`iog5
} |Ea%nghl
} Bl b#h
\l GD8@,x
/** f .O^R~,
* @param data Kb%Y%j
* @param l =XR~I
* @param i MB)<@.A0
*/ )U %`7(bN
private void insertSort(int[] data, int start, int len) { wL0[Slf}
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); {`!6w>w0
} [c,V=:Cq
} ;'S,JGpvT
} 3FiK/8mu
} /vSGmW-*
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堆排序： 2;v:Z^&
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package org.rut.util.algorithm.support; EO!,rB7I
t2dsYU/
import org.rut.util.algorithm.SortUtil; sX1DbEjj[o
9JA@m
/** w"' Pn`T
* @author treeroot XoKgs,y4
* @since 2006-2-2 jFN0xGZ
* @version 1.0 Nc\DXc-N
*/ k{qxsNM
public class HeapSort implements SortUtil.Sort{ ,Cr%2Wg-
>Scyc-n
/* (non-Javadoc) 4S26TgY
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )L b` 4B
*/ dmF=8nff
public void sort(int[] data) { q;eb
MaxHeap h=new MaxHeap(); #/YS
h.init(data); kLgkUck8]
for(int i=0;i h.remove(); T?1BcY
System.arraycopy(h.queue,1,data,0,data.length); c(Dp`f,
} n#X~"|U`
4/(#masIL
private static class MaxHeap{ eo]nkyYDP
A%D'Z85 -
void init(int[] data){ !aT:0m$:9c
this.queue=new int[data.length+1]; "@G[:(BoB<
for(int i=0;i queue[++size]=data; {)qr3-EM#
fixUp(size); 2y`h'z
} IWo'{pk
} ^%f8JoB
3yx[*'e$
private int size=0; ljbAfd
1V2]@VQF
private int[] queue; |=q~X}DA
M(C">L]8
public int get() { );!ND%
return queue[1]; \TP$2i%W
} Q:P)g#suc
%6Gg&Y$j!
public void remove() { _HwA%=>7
SortUtil.swap(queue,1,size--); c6:uM1V{
fixDown(1); IHEbT
} XUP{]w`.Z
file://fixdown xa)p,
private void fixDown(int k) { :?xH)J,imk
int j; A+l(ew5Lw$
while ((j = k << 1) <= size) { y.Z_\@
if (j < size %26amp;%26amp; queue[j] j++; Q/|.=:~FO
if (queue[k]>queue[j]) file://不用交换 m1W) PUy
break; %,[,mW4l
SortUtil.swap(queue,j,k); i]MemM-
k = j; 9^/Y7Wp/@
} `KZV@t
} N:lE{IvRJ
private void fixUp(int k) { ,V1"Typ#<
while (k > 1) { _<AkM"
int j = k >> 1; b+~_/;Y9
if (queue[j]>queue[k]) Z^'~iU-?
break; q(n"r0)=
SortUtil.swap(queue,j,k); `NtW+v
k = j; vEI{AmogRx
} c0o]O[
} s*rR>D:
WOn53|GQK
} }ktIG|GC
i|{psA
} ZLzc\>QX
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SortUtil： JU)^b V_
LuySa2,
package org.rut.util.algorithm; s~OcL 5
~ky;[
import org.rut.util.algorithm.support.BubbleSort; KJ+6Y9b1
import org.rut.util.algorithm.support.HeapSort; 6/<Hx@r (
import org.rut.util.algorithm.support.ImprovedMergeSort; 0d+n[Go+S
import org.rut.util.algorithm.support.ImprovedQuickSort; k^cZePqE6d
import org.rut.util.algorithm.support.InsertSort; L-(bw3Yr>
import org.rut.util.algorithm.support.MergeSort; gY7sf1\wX
import org.rut.util.algorithm.support.QuickSort; EK# 11@0%
import org.rut.util.algorithm.support.SelectionSort; Phi5;U!
import org.rut.util.algorithm.support.ShellSort; QD7KE6KP'
=DdPwr 0Op
/** M0$MK>
* @author treeroot %np(z&@wi
* @since 2006-2-2 "s|P,*Xf
* @version 1.0 6>]
*/ g**!'T4&o
public class SortUtil { MFROAVPZ5
public final static int INSERT = 1; #e@NV4q
public final static int BUBBLE = 2; #QFz /6
public final static int SELECTION = 3; 9\EW~OgTu
public final static int SHELL = 4; pFH.beY
public final static int QUICK = 5; e%e.|+
public final static int IMPROVED_QUICK = 6; L;0 NR(b!
public final static int MERGE = 7; Dn)yBA%
public final static int IMPROVED_MERGE = 8; _.9 5>`
public final static int HEAP = 9; dU3A:uS^
]EHsRd
public static void sort(int[] data) { ?7fqWlB
sort(data, IMPROVED_QUICK); 4~Qnhv7
} y#a,d||N1
private static String[] name={ n#6{K6}k~
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" PE5*]+lW.
}; .F,l>wUNe
DinZZ
private static Sort[] impl=new Sort[]{ &.E/%pQ`
new InsertSort(), AO8 #l YP?
new BubbleSort(), c>$d!IKCL
new SelectionSort(), ?1L<VL=b
new ShellSort(), _GkLspSaU
new QuickSort(), f+9eB
new ImprovedQuickSort(), wn@~80)$
new MergeSort(), 8=$XhC
new ImprovedMergeSort(), QKjn/%l"@
new HeapSort() Fj`k3~tUw
}; n{N0S^h
E2M<I;:EA
public static String toString(int algorithm){ QqQhQGV
return name[algorithm-1]; f$FO 1B)
} ~R[ k^i.Y
l)\Q~^cxd
public static void sort(int[] data, int algorithm) { {_b2!!p
impl[algorithm-1].sort(data); MH#Tp#RG
} Y/J~M$9P,
i[[.1MnS
public static interface Sort { q;#AlquY@
public void sort(int[] data); F^/KD<cgK
} ^B1Ft5F`b
i!%WEHPe
public static void swap(int[] data, int i, int j) { w)ki<Dudg
int temp = data; ulzX$
data = data[j]; CJk"yW[,|
data[j] = temp; Dh4Lffy
} WSMpX-^e@
} wb9(aS4