[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; k=L(C^VP
} :y#KR\T1
int i1=l; <7Igd6u
int i2=mid+1; agdiJ-lyQ
for(int cur=l;cur<=r;cur++){ kH$)0nK
if(i1==mid+1) ?L.c~w;l
data[cur]=temp[i2++]; XoI,m8A
else if(i2>r) ~{MmUp rS
data[cur]=temp[i1++]; u7R:7$H
else if(temp[i1] data[cur]=temp[i1++]; l{OU\
else Hp`Mp)1s
data[cur]=temp[i2++]; 9;,_Qq
} E5@U~|V[
} g_{hB5N](7
Ewg5s?2|
} A#t#c*
e+J|se4L5
改进后的归并排序: =pHWqGOD
p<hV7x-{
package org.rut.util.algorithm.support; 'U=D6X%V9m
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import org.rut.util.algorithm.SortUtil; U-+%e:v
uEp v l
/** /Hxz@=LC1
* @author treeroot >(>Fx\z}
* @since 2006-2-2 1%W|>M`
* @version 1.0 h!#!}|Q'
*/ D4jf%7X!Lu
public class ImprovedMergeSort implements SortUtil.Sort { .CXe*Vbd
0>PO4WFVJ
private static final int THRESHOLD = 10; &Z Ja}5k!r
?Uz7($}
/* 'J*)o<%
* (non-Javadoc) QvB]?D#h
* f?xc-lX5R
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9AJMm1_
*/ L\p@1N?K
public void sort(int[] data) { uYk4qorA
int[] temp=new int[data.length]; doJ\7c5uU
mergeSort(data,temp,0,data.length-1); MN|8(f5Gs
} -26GOS_8z
$'M:H_T
private void mergeSort(int[] data, int[] temp, int l, int r) { .^]=h#[e
int i, j, k; >C|/%$kk:f
int mid = (l + r) / 2; OW$? 6
if (l == r) "f'pa&oHi
return; bvM\Qzc!<3
if ((mid - l) >= THRESHOLD) |UbwPL_L
mergeSort(data, temp, l, mid); xxnMvL;
else $O|J8;"v
insertSort(data, l, mid - l + 1); Rxe sK
if ((r - mid) > THRESHOLD) 6.fahg?E
mergeSort(data, temp, mid + 1, r); +{* @36A5A
else Q=hf,/N
insertSort(data, mid + 1, r - mid); xv! QO
3W*O%9t7
for (i = l; i <= mid; i++) { # f~,8<K
temp = data; !wl3}]q
} (bP\_F5D
for (j = 1; j <= r - mid; j++) { e%#8]$
temp[r - j + 1] = data[j + mid]; Q<]~>cd^
} DkO>?n:-C
int a = temp[l]; <&&xt ?I.
int b = temp[r]; nr/^HjMV
for (i = l, j = r, k = l; k <= r; k++) { m*VM1kV
if (a < b) { FBfyW- 7
data[k] = temp[i++]; S&BJR!FQ
a = temp; ]@@3]
} else { 7.O1 ~-
data[k] = temp[j--]; qGS]2KY
b = temp[j]; | ?Js)i
} pq;)l(Hi
} @C),-TM
} 41swG
4v#3UG
/** r{m"E^K,
* @param data 8e_ITqV%
* @param l =A,32&;@N
* @param i V0p@wG3
*/ Q^qG=
private void insertSort(int[] data, int start, int len) { x)@G+I\u
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); @21G[!%J
} ]#hT!VOd
} h[c HCVM:
} 'c#ZW|A
} AuZ?~I1
n*\AB=|X
堆排序： Jt4T)c9
]1]
package org.rut.util.algorithm.support; h[d|y_)f
IQK__)
import org.rut.util.algorithm.SortUtil; D_E^%Ea&`
+nKxSjqI
/** A{hwT,zV:
* @author treeroot Gq5)>'D?
* @since 2006-2-2 >M7e'}0;
* @version 1.0 u(KeS`
*/ i,/|H]Mzr
public class HeapSort implements SortUtil.Sort{ KZV$rJ%G
cm]D"GFLY
/* (non-Javadoc) l7 D/]&
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?9q{b\=l
*/ z41 p$
public void sort(int[] data) { 'Mjbvh4
MaxHeap h=new MaxHeap(); SJVqfi3A
h.init(data); YW"?Fy
for(int i=0;i h.remove(); 1 sCF -r
System.arraycopy(h.queue,1,data,0,data.length); CORNN8=k
} !ViHC}:
DvnK_Q!
private static class MaxHeap{ kKVq,41'
XQ:HH 8
void init(int[] data){ ZMJ\C|S:
this.queue=new int[data.length+1]; 1'EMYQ
for(int i=0;i queue[++size]=data; n?@o:c5,r
fixUp(size); 1N<)lZl)
} -W>zON|l
} lkp!S3,
IsO'aFK)ln
private int size=0; AX8;x1t^.
_-g:T&#
private int[] queue; AiiOs?
v F L{j
public int get() { Qwx}e\=
return queue[1]; hD\C[C,
} Cm}ZeQ
Jg|3Wjq5
public void remove() { \@4QG.3&
SortUtil.swap(queue,1,size--); zqYfgV
fixDown(1); d; @Kz^
} 9a)D8
file://fixdown Dbyy H_
private void fixDown(int k) { _p{ag 1gP
int j; 'dj}- Rs
while ((j = k << 1) <= size) { T$%u=$E%F
if (j < size %26amp;%26amp; queue[j] j++; `A80""y:M
if (queue[k]>queue[j]) file://不用交换 ?AY596
break; 4BuS? #_
SortUtil.swap(queue,j,k); _*Vq1D]C
k = j; -GP+e`d
} A"eT@
} fE)+9!
private void fixUp(int k) { s4SR6hBO
while (k > 1) { ]8YHA}P
int j = k >> 1; #.}Su+XF
if (queue[j]>queue[k]) l)VMF44
break; ]@ETQ8QN
SortUtil.swap(queue,j,k); ~PuPY:"
k = j; 4E3HYZ
} A'|W0|R9
} :KX/GN!n
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} Ltcr]T(Ic
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} Cgw#c%
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SortUtil： nC`#Hm.V%
Tjure]wQz
package org.rut.util.algorithm; *GuCv3|
~2A<fL,-
import org.rut.util.algorithm.support.BubbleSort; sutj G`m
import org.rut.util.algorithm.support.HeapSort; +cy(}Vp
import org.rut.util.algorithm.support.ImprovedMergeSort; h.'h L
import org.rut.util.algorithm.support.ImprovedQuickSort; xKsn);].`
import org.rut.util.algorithm.support.InsertSort; X?rJO~5
import org.rut.util.algorithm.support.MergeSort; XrSqUD
import org.rut.util.algorithm.support.QuickSort; oB9Fas!N
import org.rut.util.algorithm.support.SelectionSort; !9iVe7V
import org.rut.util.algorithm.support.ShellSort; ,`+y4Z6`W2
\"Sqr(~_
/** 5 +(YcV("
* @author treeroot v-G(bw3
* @since 2006-2-2 X+iA"B
* @version 1.0 f$V']dOj1q
*/ {br4B7b
public class SortUtil { =]W{u`
public final static int INSERT = 1; 5bmtUIj
public final static int BUBBLE = 2; |hp_X>Uv'
public final static int SELECTION = 3; *N'B(j/
public final static int SHELL = 4; ?\\ ]u
public final static int QUICK = 5; h"%6tpV-
public final static int IMPROVED_QUICK = 6; tGmyTBgx
public final static int MERGE = 7; N.eSf
public final static int IMPROVED_MERGE = 8; 7SAu">lIl
public final static int HEAP = 9; oL}FD !}
z=)5M*h
public static void sort(int[] data) { "P<~bw5
sort(data, IMPROVED_QUICK); 8Qu].nKe
} [zf9UUc~
private static String[] name={ f.+e
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" l`$f@'k
}; {!oO>t
Y]8l]l 1
private static Sort[] impl=new Sort[]{ E? F @
new InsertSort(), _rjCwo\
new BubbleSort(), |k 4+I
new SelectionSort(), >>^c_0"O
new ShellSort(), oF,8j1
new QuickSort(), (:T~*7/"
new ImprovedQuickSort(), Kq!n`@
new MergeSort(), DU1,i&(
new ImprovedMergeSort(), i-E&Y*\^9H
new HeapSort() )J#@L*
}; 62vz 'b
JI\u -+BE
public static String toString(int algorithm){ vgE5(fJh
return name[algorithm-1]; PI0/=kS
} fvNGGn!
m@HU;J\I
public static void sort(int[] data, int algorithm) { XTW/3pB
impl[algorithm-1].sort(data); y'pG'"U]_
} 3wR5:O$H
hDp'=}85@
public static interface Sort { ;oR-\;]/.
public void sort(int[] data); 5&94VQ$d
} QX(:!b
<j,7Z>Rk\x
public static void swap(int[] data, int i, int j) { kFk+TXLDIt
int temp = data; E) z g,7Y
data = data[j]; &a:>P>\
data[j] = temp; nh9K(
} kt;X|`V{5z
} wRie{Vk