[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; L)nVpqm
} BnnUUaE
int i1=l; i11GW
int i2=mid+1; <W[8k-yOV`
for(int cur=l;cur<=r;cur++){ sq6%=(q(?
if(i1==mid+1) Sph"w08
data[cur]=temp[i2++]; o_KcnVQ\
else if(i2>r) )s7Tv#[
data[cur]=temp[i1++]; "drh+oo.
else if(temp[i1] data[cur]=temp[i1++]; dK(%u9v
else j{w,<Wt>
data[cur]=temp[i2++]; eYX_V6c
} $^D(%
} (>5VS
yLIj4bf
} *Wo$$T
t~W4o8<w
改进后的归并排序: ?m r@B
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package org.rut.util.algorithm.support; W;}u 2GH
}GNH)-AG)$
import org.rut.util.algorithm.SortUtil; n; '~"AG)
'GdlqbX(%
/** .yh2ttf<gB
* @author treeroot {S:3 FI
* @since 2006-2-2 ^?.:}
* @version 1.0 ]\mb6Hc
*/ Fh4w0u*Q
public class ImprovedMergeSort implements SortUtil.Sort { +FKP5L}
2?7hUaHX
private static final int THRESHOLD = 10; .q[sk
pz6- hi7
/* =|&"/$+s
* (non-Javadoc) }(%}"%$
* `L[32B9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) LOG*K;v3
*/ VGUDUM.8
public void sort(int[] data) { 714nUA872
int[] temp=new int[data.length]; e4H0<h }{
mergeSort(data,temp,0,data.length-1); e%0#"6}
} d*:qFq_
w,#W&>+&
private void mergeSort(int[] data, int[] temp, int l, int r) { l'lDzB+.*
int i, j, k; 1Y"qQp
int mid = (l + r) / 2; ]B'
if (l == r) c1!/jTX$
return; jG ;(89QR/
if ((mid - l) >= THRESHOLD) 5%aKlx9^#
mergeSort(data, temp, l, mid); jqsktJw#i
else @.@#WHde
insertSort(data, l, mid - l + 1); i-vJ&}}
if ((r - mid) > THRESHOLD) tsC|R~wW
mergeSort(data, temp, mid + 1, r); eKti+n.
else VP[!ji9P
insertSort(data, mid + 1, r - mid); 5$Q`P',*Ua
%c2i.E/G
for (i = l; i <= mid; i++) { "/-v 9
temp = data; x]+KO)I
} QAnfxt6
for (j = 1; j <= r - mid; j++) { R/xCS.yl}
temp[r - j + 1] = data[j + mid]; !4cdP2^P
} uqeWdj*Y
int a = temp[l]; [Et\~'2w8=
int b = temp[r]; Z5a@fWU
for (i = l, j = r, k = l; k <= r; k++) { 1% %Tm"
if (a < b) { 7Bd_/A($
data[k] = temp[i++]; kL2sJX+
a = temp; :+^llz
} else { >b](v)
data[k] = temp[j--]; =0fx6V
b = temp[j]; OL"5A18;M
} <l/Qf[V
} s/0FSv x
} >:nJTr
}'v?Qq
/** F9J9pgVP
* @param data DJjDKVO5t
* @param l >mSl~.I2
* @param i &L`p4AZ
*/ _\[JMhd}
private void insertSort(int[] data, int start, int len) { neH"ks5
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); +Z(VWu6
} #X_M
} {v/6|
} <rmV$_
} @<JQn^M
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堆排序： ]-LE'Px|
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package org.rut.util.algorithm.support; I T2sS6&R
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import org.rut.util.algorithm.SortUtil; ;|,Y2?
3H%WB|
/** IH:Cm5MV
* @author treeroot ${eh52)`
* @since 2006-2-2 I;Y`rGj
* @version 1.0 r(CL=[
*/ z{WqICnb
public class HeapSort implements SortUtil.Sort{ 6{WT;W>WT:
640V&<+v
/* (non-Javadoc) TBYL~QQD\C
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) cSDCNc*%
*/ Z}StA0F_
public void sort(int[] data) { u#|Jl|aT
MaxHeap h=new MaxHeap(); _Hj,;Z
h.init(data); ~,7R*71
for(int i=0;i h.remove(); k5 l~
System.arraycopy(h.queue,1,data,0,data.length); ?+L6o C.;
} YWF<2l.
YL0RQa
private static class MaxHeap{ x"De 9SB
.Dxrc
void init(int[] data){ ;KN@v5`p
this.queue=new int[data.length+1]; }CqIKoX.
for(int i=0;i queue[++size]=data; zKT<QM!`
fixUp(size); 8}@a?QS(&
} -e\56%\~_
} 4;{CR. D
f#b[KB^Z,2
private int size=0; Nuq/_x
XL9lB#v^
private int[] queue; 6E4L4Vb
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public int get() { 4`]1W,t
return queue[1]; 1_]l|`Po
} AOUO',v
(E[hl
public void remove() { &p/k VM
SortUtil.swap(queue,1,size--); X[6z
fixDown(1); Z`MQ+
} 'J$NW
file://fixdown cXH?'q'vZ
private void fixDown(int k) { v0H#\p
int j; Pw.+DA
while ((j = k << 1) <= size) { /RJSkF+!
if (j < size %26amp;%26amp; queue[j] j++; 3|3lUU\I
if (queue[k]>queue[j]) file://不用交换 }"tYb6*
break; Vd~k4
SortUtil.swap(queue,j,k); +N:%`9}2V
k = j; 0[Aa2H*
} h 42?^mV4?
} Y [S^&pF
private void fixUp(int k) { FFGTIT# {"
while (k > 1) { sBL^NDqa2
int j = k >> 1; ,_O[;L
if (queue[j]>queue[k]) {eV_+@dT
break; R?I3xb
SortUtil.swap(queue,j,k); VTa8.(i6v
k = j; f#mpd]e+6
} -XB>&dNl)T
} mQJGKh&Pk
dGjvSK<1@
} K2Zy6lGOZ
d?.x./1[qi
} R\?!r4
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SortUtil： Jsl,r+'H
{ q<l]jn9
package org.rut.util.algorithm; v>R.ou(
=c'LG
import org.rut.util.algorithm.support.BubbleSort; A:Z:&(NtE:
import org.rut.util.algorithm.support.HeapSort; K.~U%v}
import org.rut.util.algorithm.support.ImprovedMergeSort; 5N/;'ySAE_
import org.rut.util.algorithm.support.ImprovedQuickSort; ) |a5Qxz
import org.rut.util.algorithm.support.InsertSort; Vy$\.2=
import org.rut.util.algorithm.support.MergeSort; ~JiA
import org.rut.util.algorithm.support.QuickSort; Fy^\Uw
import org.rut.util.algorithm.support.SelectionSort; uv!/DX#
import org.rut.util.algorithm.support.ShellSort; 0:EiCKb)ol
\=~Ap#Mpc4
/** )9O{4PbU!
* @author treeroot %e(,PL
* @since 2006-2-2 7 &Aakl
* @version 1.0 gK'MUZ()
*/ uPPe"$
public class SortUtil { gu!A:Q
public final static int INSERT = 1; arJ[.f9s
public final static int BUBBLE = 2; 3ssio-X
public final static int SELECTION = 3; p"Y=
public final static int SHELL = 4; H Vy^^$
public final static int QUICK = 5; 0a5P@;"a
public final static int IMPROVED_QUICK = 6; MRc^lYj{
public final static int MERGE = 7; YX(%jcj*
public final static int IMPROVED_MERGE = 8; ~S9nLb:O{
public final static int HEAP = 9; C Qebb:y
|%}?*|-
public static void sort(int[] data) { 4=Zlsp
sort(data, IMPROVED_QUICK); NINiX(
} F)G#\r
private static String[] name={ (@Bm2gH
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ]jYM;e
}; >J1o@0tk
<4Fd~
private static Sort[] impl=new Sort[]{ B$G8,3,:
new InsertSort(), P?F:x=@'|
new BubbleSort(), \Ip<bbB0
new SelectionSort(), -h}J%UV
new ShellSort(), {)M4h?.2
new QuickSort(), NKRXY~zHh
new ImprovedQuickSort(), 7~&Y"&
new MergeSort(), V4>P8cE
new ImprovedMergeSort(), 6`i'
new HeapSort() g7pFOcV
}; }|d:(*
v|xlI4
public static String toString(int algorithm){ tkmW\
return name[algorithm-1]; )Jc>l;G(M
} C+Z"0\{o
Smp+}-3O
public static void sort(int[] data, int algorithm) { IO4 IaeM
impl[algorithm-1].sort(data); SV~xNzo~
} y-U(`{[nM
#3S/TBy,
public static interface Sort { yRtFUlm`
public void sort(int[] data); Z7v~;JzC#
} }y1M0^M-$
'coqm8V[%
public static void swap(int[] data, int i, int j) { yQ}~ aA#h
int temp = data; &P;x<7h$t?
data = data[j]; =YBJ7.Y
data[j] = temp; 1#V0g Q
} B.|vmq,u
} d3\8BKp