[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; `c:r`Oi?
} ZZi9<g1
int i1=l; 6X ]I`e
int i2=mid+1; eI|FrBq%
for(int cur=l;cur<=r;cur++){ z{.&sr>+v
if(i1==mid+1) D*L@I@ [
data[cur]=temp[i2++]; nR%w5oe
else if(i2>r) ?r;F'%N=
data[cur]=temp[i1++]; K*~xy bA
else if(temp[i1] data[cur]=temp[i1++]; 8\il~IFyi
else :MDFTw~|
data[cur]=temp[i2++]; d/NjY[`5+
} 4gZR!J
} E2hML
V^(W)\
} 5P*jGOg.
319 4]
改进后的归并排序: ; <- f
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package org.rut.util.algorithm.support; P'}EZ'
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import org.rut.util.algorithm.SortUtil; u}'m7|)8
d3oRan}z
/** )m-(-I
* @author treeroot Z){fie4WM
* @since 2006-2-2 iLdUus!
* @version 1.0 g9GPyU
*/ =j_4!^
public class ImprovedMergeSort implements SortUtil.Sort { !rx5i
nJH'^rO!C
private static final int THRESHOLD = 10; ;&b=>kPlZ
m%U=:u7#M
/* .:-*89c
* (non-Javadoc) i39_( )X
* '<"%>-^Gn
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) i[/1AI
*/ |}l/6WHB
public void sort(int[] data) { `[=/f=Q}
int[] temp=new int[data.length]; mv<cyWp
mergeSort(data,temp,0,data.length-1); ?zo7.R-Vac
} }m!T~XR</
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private void mergeSort(int[] data, int[] temp, int l, int r) { I/h(*~/
int i, j, k; JWt@vf~
int mid = (l + r) / 2; #,jm3Mqj
if (l == r) 3&X5*-U
return; #;2kN &
if ((mid - l) >= THRESHOLD) <Rt0 V%}-
mergeSort(data, temp, l, mid); ziAn9/sT
else P@etT8|V
insertSort(data, l, mid - l + 1); &sq q+&ao
if ((r - mid) > THRESHOLD) c:DV8'fT
mergeSort(data, temp, mid + 1, r); N,)rrBD
else F0xm%?
insertSort(data, mid + 1, r - mid); "t{D5{q|[k
p=Qo92 NH
for (i = l; i <= mid; i++) { FN0<iL
temp = data; Ud-c+, xX
} B)DtJf
for (j = 1; j <= r - mid; j++) { wh]v{Fi'
temp[r - j + 1] = data[j + mid]; <.|]%7
} ++kVq$9@y
int a = temp[l]; gZ(\/m8Z
int b = temp[r]; -OQ6;A"#
for (i = l, j = r, k = l; k <= r; k++) { 6.v)q,JL
if (a < b) { e~G IUwJ
data[k] = temp[i++]; _T^@,!&
a = temp; ;S2/n$Ju_
} else { CfLPs)\ACm
data[k] = temp[j--]; n%dh|j2u
b = temp[j]; !O,`Z`T?
} )q+;+J`>
} E-rGOm" m
} b<g9L4s
h>NuQo*
/** c}7Rt|`c
* @param data ]T<RC\o
* @param l :as2fO$?
* @param i gdBH\K(\
*/ a '<B0'
private void insertSort(int[] data, int start, int len) { CIt@xi#I
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Cp-p7g0wlg
} p-8x>dmP(
} {NIE:MXX
} ~<_PjV
} ~ Q;qRx
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堆排序： r^"pLzAx
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package org.rut.util.algorithm.support; |P=-m-W
C'z}jM`g
import org.rut.util.algorithm.SortUtil; bq}o#d5p-_
,3ivB8
/** pu+jw<7
* @author treeroot vB/G#\Zqz
* @since 2006-2-2 9<!Ie^o?
* @version 1.0 )e\IdKl=
*/ !vSj1w
public class HeapSort implements SortUtil.Sort{ XCZNvLG
/`B:F5r
/* (non-Javadoc) y}lqF8s
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8z"*CJ@
*/ 7gbu7"Qc
public void sort(int[] data) { Pu|3_3^
MaxHeap h=new MaxHeap(); 7NfA)$
h.init(data); k'{Bhi4
for(int i=0;i h.remove(); 6SD9lgF*-
System.arraycopy(h.queue,1,data,0,data.length); &Sp2['a!
} }W* q
M,9f}V)
private static class MaxHeap{ *1b)Va8v*
m:{IVvN_
void init(int[] data){ h-:te9p6>4
this.queue=new int[data.length+1]; 5F|oNI}$:
for(int i=0;i queue[++size]=data; 6M_,4> -
fixUp(size); k| ,F/:
} ER$qL"H U
} +dSO?Y]
B"I^hrQ
private int size=0; O9[Dae{i
ZC:7N{a
private int[] queue; h}jE=T5Hc
kC-OZVoO
public int get() { <@2g.+9
return queue[1]; 5"9!kZ(<
} [E|%
iwnFCZVS
public void remove() { /jv4#9
SortUtil.swap(queue,1,size--); t5WW3$Nf
fixDown(1); 6{PlclI !
} -|A`+1-R+
file://fixdown q*4=sf,>
private void fixDown(int k) { 1$ C\`
int j; \B~}s}
while ((j = k << 1) <= size) { ?T <2Cl'C
if (j < size %26amp;%26amp; queue[j] j++; u IGeSd5B
if (queue[k]>queue[j]) file://不用交换 dBMr%6tz
break; r5g:#mF"
SortUtil.swap(queue,j,k); J PK(S~
k = j; N3g\X
} 5ki<1{aVtZ
} KI{B<S3*Z
private void fixUp(int k) { h#rziZ(
while (k > 1) { +&h<:/ V
int j = k >> 1; u3ns-e
if (queue[j]>queue[k]) o79EDPX
break; hV]]%zwR+
SortUtil.swap(queue,j,k); -9z!fCu3
k = j; 'l*p!=
} /KH,11)yc
} kls 6Dk#
'9d] B^)F
} =;?afUj
(7_}UT@w-
} KN-)m ta&
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SortUtil： 0B?t:XU,
P4S]bPIp
package org.rut.util.algorithm; zBTyRL l
I[v6Y^{q
import org.rut.util.algorithm.support.BubbleSort; &;]KntxB
import org.rut.util.algorithm.support.HeapSort; SV0h'd(b
import org.rut.util.algorithm.support.ImprovedMergeSort; B78e*nNS#2
import org.rut.util.algorithm.support.ImprovedQuickSort; _)?59
import org.rut.util.algorithm.support.InsertSort; n6]8W^g
import org.rut.util.algorithm.support.MergeSort; Y(3X5v?[
import org.rut.util.algorithm.support.QuickSort; ^TF71uo
import org.rut.util.algorithm.support.SelectionSort; /I/gbmc)
import org.rut.util.algorithm.support.ShellSort; I c 2R\}q
Z0I>PBL@l
/** .>Fy ]Cqoh
* @author treeroot r0fxEYze&
* @since 2006-2-2 yO`HL'SMo
* @version 1.0 B LI 9(@
*/ 6_wj,7
public class SortUtil { K{WLo5HP
public final static int INSERT = 1; yz7X7mAo
public final static int BUBBLE = 2; yhSbX4Q
public final static int SELECTION = 3; +<o}@hefY2
public final static int SHELL = 4; hiQ#<
public final static int QUICK = 5; L6=`x a,
public final static int IMPROVED_QUICK = 6; ydm2'aV
public final static int MERGE = 7; U+FI^Xrt#
public final static int IMPROVED_MERGE = 8; _8I\!
public final static int HEAP = 9; u?B9zt%$-m
/l&$B
public static void sort(int[] data) { r?j2%M\
sort(data, IMPROVED_QUICK); &<RK=e'*x
} 1rLK1X
private static String[] name={ Q^k\q
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ;bhD:$NB X
}; zIT)Hs5
;*}tbh3;.
private static Sort[] impl=new Sort[]{ |s$w i>7l
new InsertSort(), 82*nC!P3E
new BubbleSort(), o3OtG#g2
new SelectionSort(), 9O2??N7f
new ShellSort(), _aj,tz
new QuickSort(), yT<,0~F9
new ImprovedQuickSort(), $WS?/H0C
new MergeSort(), P")1_!
new ImprovedMergeSort(), }@H(z
new HeapSort() "F+m}GJ=a
}; Q^!x8oUF
[;RO=
public static String toString(int algorithm){ {GP#/5$=
return name[algorithm-1]; lzDA0MPI:
} xg8$ <Ut
1@W*fVn
public static void sort(int[] data, int algorithm) { &=S<StH
impl[algorithm-1].sort(data); ?hh#@61
} 1@S(v L3a
NwbX]pDT
public static interface Sort { r&_bk Y%
public void sort(int[] data); VkJBqRzBOa
} ;5PBZ<w
sf5F$
public static void swap(int[] data, int i, int j) { ~,O&A B
int temp = data; V krjs0
data = data[j]; gHmy?+)
data[j] = temp; ,?/AIL]_
} 9T;DFUM
} d;FOmo4