[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; ,DjZDw
} u'C4d6\wS
int i1=l; a]*^uEs
int i2=mid+1; DRnXo-Aaj
for(int cur=l;cur<=r;cur++){ -p1arA
if(i1==mid+1) Co M8
data[cur]=temp[i2++]; l40$}!!<
else if(i2>r) 6eBQ9XV
data[cur]=temp[i1++]; LLMkv!%D
else if(temp[i1] data[cur]=temp[i1++]; Y+N87C<
else sr\MQ?\fB
data[cur]=temp[i2++]; DmYm~hzJ
} `i}\k
} W$&Q.Z
la-+`
} otOl7XF
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改进后的归并排序: N\u-8nE5
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package org.rut.util.algorithm.support; KNnE5f
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import org.rut.util.algorithm.SortUtil; F-nt7l
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/** CNwhH)*
* @author treeroot 5segzaI
* @since 2006-2-2 )gR&Ms4
* @version 1.0 $KiA~l
*/ E-/]UH3u H
public class ImprovedMergeSort implements SortUtil.Sort { NO&OuiN
q&+GpR
private static final int THRESHOLD = 10; 6*e:ey U
7J_H Ox#
/* _tjH=Ff$
* (non-Javadoc) 9'tM65K
* mb#)w`<
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Yv{AoL~
*/ 6l=n&YO
public void sort(int[] data) { {Hb _o)S
int[] temp=new int[data.length]; 0YS*=J"7z
mergeSort(data,temp,0,data.length-1); =($qiL'h
} ?vhW`LXNB
oxRu:+N
private void mergeSort(int[] data, int[] temp, int l, int r) { Qcw/>LaL:
int i, j, k; k_skn3,u
int mid = (l + r) / 2; A4#m&o
if (l == r) aoBM_#
return; l6O2B/2j
if ((mid - l) >= THRESHOLD) 71~V*
mergeSort(data, temp, l, mid); R_^:<F0
else :( `Q4D~l
insertSort(data, l, mid - l + 1); .{Xi&[jw
if ((r - mid) > THRESHOLD) r4-r z+x
mergeSort(data, temp, mid + 1, r); jj^CW"IB
else Q|0[B4e^:
insertSort(data, mid + 1, r - mid); m\t %wr
`aJ[ !O
for (i = l; i <= mid; i++) { 2@ad!h
temp = data; -Oo$\=d
} &W ~,q(
for (j = 1; j <= r - mid; j++) { XW19hG
temp[r - j + 1] = data[j + mid]; 6S<pWR~
} "e(Nh%t
int a = temp[l]; q[+];
int b = temp[r]; #):FXB$a
for (i = l, j = r, k = l; k <= r; k++) { /g_}5s-Z
if (a < b) { !rXyw`6N
data[k] = temp[i++]; v(afaN
a = temp; Fv3fad@x
} else { #R)$nv:h?^
data[k] = temp[j--]; {C<ch@sR
b = temp[j]; Q{>{ e3z}
} A5z`3T;1
} Tx!mW-Lt
} K <0ItNv
p1Els/|
/** WUHijHo5(8
* @param data L:S[QwQu8
* @param l <5nz:B/
* @param i O=yUAAD$
*/ Ly^r8I
private void insertSort(int[] data, int start, int len) { 0iwx$u7[
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); < B'BlqTS
} $Q?<']|A
} {AB0 PM;-
} l{;vD=D
} 6@bO3K|
gn'. 9";j
堆排序： 1(m89C[
<%|2yPb]
package org.rut.util.algorithm.support; ~*H!zKIx
KF-n_:Bd+
import org.rut.util.algorithm.SortUtil; E")82I
GU_R6Wt+
/** -{ZRk[>Z
* @author treeroot vmL0H)q
* @since 2006-2-2 ba ,2.|
* @version 1.0 @o_-UsUX
*/ R7vO,kZ6Q
public class HeapSort implements SortUtil.Sort{ kMUjSa~\
65g\WB+/
/* (non-Javadoc) Zj$U_
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) S25&UwUw
*/ kMK-E<g
public void sort(int[] data) { Z5+qb
MaxHeap h=new MaxHeap(); './s'!Lj
h.init(data); (A?/D!y
for(int i=0;i h.remove(); wVp
System.arraycopy(h.queue,1,data,0,data.length); ]81P<Y(7
} 'b%S3)}
h\jwXMi,tj
private static class MaxHeap{ z`'{l{
@'dtlY5;
void init(int[] data){ I>:M1Yc0
this.queue=new int[data.length+1]; f~t*8rG~m
for(int i=0;i queue[++size]=data; WOquG
fixUp(size); dZ_Hj X7
} bz,C%HFA
} !}<Y^="
FL-sXg
private int size=0; ,|}Pof=]xk
&_G^=Nc,H
private int[] queue; 81`-xVd
;jS~0R
public int get() { V D-,)f
return queue[1]; c?IFI
} <w<&,xM
Y=\;$:L[
public void remove() { j#zUO&Q@
SortUtil.swap(queue,1,size--); n YWS'i@
fixDown(1); .r$d 8J
} 6o!+E@V b
file://fixdown qE!.C}L+
private void fixDown(int k) { 9F@Q
int j; 7ZqC1
while ((j = k << 1) <= size) { xXQDHc-Ba
if (j < size %26amp;%26amp; queue[j] j++; )BmK'H+l
if (queue[k]>queue[j]) file://不用交换 +<7`Gn(n3
break; |]*]k`o<)
SortUtil.swap(queue,j,k); gWL'Fl}H
k = j; $0=f9+@5
} Z2!O)8
} wgp{P>oBX
private void fixUp(int k) { 9Eu.Y
while (k > 1) { 5Ay\s:hb[u
int j = k >> 1; =*_T;;E
if (queue[j]>queue[k]) |Q[[WHqj2f
break; t&*X~(Yb!
SortUtil.swap(queue,j,k); -YPUrU[)
k = j; EPkmBru ^
} <#k(g\/R
} Q!9AxM2K
Myvp PW
} U8m/L^zh
W^v3pH-y#
} 2Sz?r d,0f
Bs:INvhYW
SortUtil： f_I6g uDPz
xJlf}LEyF
package org.rut.util.algorithm; 68 vu
eEl}.W}
import org.rut.util.algorithm.support.BubbleSort; $qO%lJ:
import org.rut.util.algorithm.support.HeapSort; 8A}cxk
import org.rut.util.algorithm.support.ImprovedMergeSort; @|BaZq,g
import org.rut.util.algorithm.support.ImprovedQuickSort; Te_%r9P|2
import org.rut.util.algorithm.support.InsertSort; AR8zCKBc^
import org.rut.util.algorithm.support.MergeSort; }V:ZGP#!'
import org.rut.util.algorithm.support.QuickSort; SoC3)iqv/
import org.rut.util.algorithm.support.SelectionSort; `\Z7It?aDs
import org.rut.util.algorithm.support.ShellSort; 7|bzopLJk
"&lQ5]N.%
/** H!PMb{e
* @author treeroot ]jQj/`v1
* @since 2006-2-2 <m7m
* @version 1.0 }g&A=u_2
*/ sbqAjm}
public class SortUtil { J$"3w,O6+U
public final static int INSERT = 1; l/ufu[x!a
public final static int BUBBLE = 2; f2ea|l
public final static int SELECTION = 3; m?*}yM
public final static int SHELL = 4; F8Y_L\q
public final static int QUICK = 5; +J[<zxh\
public final static int IMPROVED_QUICK = 6; _[IOPHa"
public final static int MERGE = 7; /zV&ebN]
public final static int IMPROVED_MERGE = 8; ;=r_R!d@
public final static int HEAP = 9; {^(h*zxn
t`%Xxxu
public static void sort(int[] data) { 7\.{O$Q
sort(data, IMPROVED_QUICK); x)GpNkx:
} xw2dNJL
private static String[] name={ /h6K"w=='!
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" U4s)3jDw
}; cCa+UTxaJ
}3HN$Fwo
private static Sort[] impl=new Sort[]{ Wl?0|{W
new InsertSort(), .! 'SG6 q
new BubbleSort(), MEKsL7
new SelectionSort(), VO u/9]a
new ShellSort(), VCf/EkC
new QuickSort(), b}<?& @
new ImprovedQuickSort(), yVZLZLm
new MergeSort(), `|&#=hl~
new ImprovedMergeSort(), 7F$G.LhMw
new HeapSort() X?f\j"v
}; \P~h0zg?
\%BII>VS
public static String toString(int algorithm){ }o,-@R~
return name[algorithm-1]; ,9~=yC
} {wJ8% ;Z7
~$PY6s
public static void sort(int[] data, int algorithm) { ;+;%s D
impl[algorithm-1].sort(data); P z< \q;
} "WF@T
T@H<Fm_
public static interface Sort { 6>DmcG:.
public void sort(int[] data); 2UbTKN
} M1HGXdN*B
#EG$HX]
public static void swap(int[] data, int i, int j) { wa1Qt
int temp = data; y\?NB:=%
data = data[j]; z*,J0)<Q
data[j] = temp; IEmjWw4
} 0#y i5U
} &) qs0