[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; GR&z,
} 6g|*`x{
int i1=l; d ^^bke$~
int i2=mid+1; GGNvu)"
for(int cur=l;cur<=r;cur++){ l n{e1':$"
if(i1==mid+1) 8K.R=
data[cur]=temp[i2++]; aoTM
else if(i2>r) dYT%
data[cur]=temp[i1++]; SQ44
else if(temp[i1] data[cur]=temp[i1++]; ^Y=\#-Dd
else k3u"A_"c
data[cur]=temp[i2++]; LCZ\4g05
} &|Bc7+/P
} _y),J'W^3u
tz5e"+Tz
} O~T@rX9f
_Tf4WFu2
改进后的归并排序: /M|262%
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package org.rut.util.algorithm.support; ZvNJ^Xz
/35R u}c
import org.rut.util.algorithm.SortUtil; MLoYnR^
G}:w@}h/
/** E0Y-7&Fv
* @author treeroot Tu$f?
* @since 2006-2-2 WlB
* @version 1.0 zDw5]*R
*/ 24E}<N,g
public class ImprovedMergeSort implements SortUtil.Sort { rm5bkJcg~
C9~52+S
private static final int THRESHOLD = 10; ",^Mxm{
419x+3>}
/* ]^Qn
* (non-Javadoc) 6hlc1?
* 4.Q} 1%ZN
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) a2dnbfSWa[
*/ OjFLPGRCh
public void sort(int[] data) { nH`Q#ZFz]?
int[] temp=new int[data.length]; <D:.(AUeO
mergeSort(data,temp,0,data.length-1); q|j2MV5#g
} W{5#@_pL
IAw{P08+
private void mergeSort(int[] data, int[] temp, int l, int r) { kddZZA3`
int i, j, k; 7Nk!1s:
int mid = (l + r) / 2; ]ro*G"-_1#
if (l == r) '_GrD>P)-
return; VRI0W`
if ((mid - l) >= THRESHOLD) Jbjmv:db
mergeSort(data, temp, l, mid); [Grxw[(_:
else <L"GqNuRQ
insertSort(data, l, mid - l + 1); !D@ZYK;
if ((r - mid) > THRESHOLD) i&5XF
mergeSort(data, temp, mid + 1, r); X#*JWQO=
else jE}33"
insertSort(data, mid + 1, r - mid); N.\- 8?>
H7d/X
for (i = l; i <= mid; i++) { +wEac g>>E
temp = data; *]AdUEV?
} -db_E#
for (j = 1; j <= r - mid; j++) { P+s!|7'
temp[r - j + 1] = data[j + mid]; nSW=LjrO~<
} eCqHvMp
int a = temp[l]; XiL~TCkx4
int b = temp[r]; t/cY=Wp
for (i = l, j = r, k = l; k <= r; k++) { j7jCm:
if (a < b) { ;%<,IdhN
data[k] = temp[i++]; 6kNrYom
a = temp; !9[>L@#G
} else { _I)U%?V+
data[k] = temp[j--]; 1Md
b = temp[j]; ^su<uG<R
} jzDuE{
} d Vj_8>
} z2g3FUTX)b
VKq=7^W
/** yKa{08X:
* @param data 4Uphfzv3D
* @param l o=50>$5jlS
* @param i 7s/u(~d)
*/ .@(6Y<dN
private void insertSort(int[] data, int start, int len) { vgsJeV`}I
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ~R22?g.
} $oj:e?8N
} {@+Ty]e
} %>~sJ0
} 4kBaB
2 lj'"nm
堆排序： MRb-H1+Xf
OR%'K2C6S
package org.rut.util.algorithm.support; U%<koD[,
d/[; `ZD+
import org.rut.util.algorithm.SortUtil; @6wFst\t
~\Hc,5G
/** EdlTdn@A
* @author treeroot <kGU,@6PF
* @since 2006-2-2 3QG7C{
* @version 1.0 %kS(LlL+6
*/ )(ImLbM)
public class HeapSort implements SortUtil.Sort{ Hea;?4Vg
N+Y]st+
/* (non-Javadoc) t5y;CxL
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) NWMFtT
*/ [R=yF ~-
public void sort(int[] data) { 3~uW I%I`
MaxHeap h=new MaxHeap(); x4E7X_
h.init(data); ldiD2 Q
for(int i=0;i h.remove(); Fs9I7~L3
System.arraycopy(h.queue,1,data,0,data.length); "uaMk}[ <!
} lfqiyYFm
t m7^yn:
private static class MaxHeap{ 9~p[
c(!6^qk]!`
void init(int[] data){ ]ooIrY8
this.queue=new int[data.length+1]; )}"wesNo".
for(int i=0;i queue[++size]=data; _#r+ !e
fixUp(size); E`?3PA8
} [co% :xJu
} gP0LCK>
Bj1?x
private int size=0; +VO-oFE|
L&u$t}~)
private int[] queue; @cFJeOC|
czS+< w
public int get() { S7/eS)SQR
return queue[1]; K i'Fn"
} 3NqN\5B:
I'uSp-Sfy
public void remove() { L)@?e?9
SortUtil.swap(queue,1,size--); M<kj_.
fixDown(1); B56L1^7
} !,6c ~ w
file://fixdown {(r`k;fB
private void fixDown(int k) { 6)Y.7XR
int j; X]wRwG
while ((j = k << 1) <= size) { 3'cE\u
if (j < size %26amp;%26amp; queue[j] j++; ]pH-2_
if (queue[k]>queue[j]) file://不用交换 %M7` Hwu
break; k'Sp.
SortUtil.swap(queue,j,k); |wH5sjT
k = j; ,*7 (%k^`
} dep=&
} (Iaf?J5{
private void fixUp(int k) { `$W_R[
while (k > 1) { $ZugBh[b
int j = k >> 1; Cjc6d4~
if (queue[j]>queue[k]) Gn ~6X-l
break; r76J N
SortUtil.swap(queue,j,k); @ycDCB(D}
k = j; ??M"6k
} j4|N-:
} Kx;eaz:gx
0yuS3VY)
} {^\+iK4bS
qI#;j%V
} +trC,D
+ HK8jCa
SortUtil： 1~Oe=`{&
`w.n]TR
package org.rut.util.algorithm; _"bHe/'CI
&jslyQ#
import org.rut.util.algorithm.support.BubbleSort; mID"^NOi#
import org.rut.util.algorithm.support.HeapSort; 3?V_BUoON
import org.rut.util.algorithm.support.ImprovedMergeSort; H!5\v"]WB
import org.rut.util.algorithm.support.ImprovedQuickSort; nxWY7hU
import org.rut.util.algorithm.support.InsertSort; ]:Nsf|C0
import org.rut.util.algorithm.support.MergeSort; Yu)NO\3&
import org.rut.util.algorithm.support.QuickSort; f!I[>&n
import org.rut.util.algorithm.support.SelectionSort; psg)*'r
import org.rut.util.algorithm.support.ShellSort; >8WP0Qx/
]:4*L
/** lDYyqG4
* @author treeroot 0 q}*S~
* @since 2006-2-2 a yCY~=i
* @version 1.0 JtEo'As:[
*/ mH%yGBp_
public class SortUtil { !F A]
public final static int INSERT = 1; x:),P-~w
public final static int BUBBLE = 2; m[~V/N3
public final static int SELECTION = 3; WD]pU
public final static int SHELL = 4; oSyyd
public final static int QUICK = 5; YwDbPX
public final static int IMPROVED_QUICK = 6; lQ" p !
public final static int MERGE = 7; gkES5Q
public final static int IMPROVED_MERGE = 8; ="Ho%*@6
public final static int HEAP = 9; *AO,^R&e.
'EbWFMjy
public static void sort(int[] data) { Y9uC&/_C
sort(data, IMPROVED_QUICK); PsnWWj?c
} @k,z:~[C=
private static String[] name={ /Z~<CbKKl
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" wy0tgy(' |
}; 8$6Y{$&C
V@zg}C|e
private static Sort[] impl=new Sort[]{ iBF|&h(\
new InsertSort(), %?}33yV
new BubbleSort(), sz:g,}~h
new SelectionSort(), fVF2-Rh=
new ShellSort(), n>ULRgiT:o
new QuickSort(), WY?[,_4U
new ImprovedQuickSort(), (.D~0a JU
new MergeSort(), Si8pzd
new ImprovedMergeSort(), }uJu>'1[G
new HeapSort() *5%d XixN
}; =Je[c,&j$?
tnH2sHby
public static String toString(int algorithm){ $*e2YQdLo
return name[algorithm-1]; `UD/}j@
} /|tJ6T1LrB
AK'[c+2[
public static void sort(int[] data, int algorithm) { Fq|Ni$
impl[algorithm-1].sort(data); z\K"Rg~J
} yE:+Lo`>
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public static interface Sort { h"X;3b^ m
public void sort(int[] data); &,zq%;-f
} kD=WO4}
,{M^-3C
public static void swap(int[] data, int i, int j) { )'l:K.F
int temp = data; j[`j9mM8
data = data[j]; n^Hm;BiE#
data[j] = temp; 6:b!F
} &e @2
} hs^zTZ_