[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; G#M)5'Q]U
} yU?jmJ
int i1=l; 6*OL.~WE
int i2=mid+1; 39pG-otJ
for(int cur=l;cur<=r;cur++){ VJh8`PVX
if(i1==mid+1) Z:;}
data[cur]=temp[i2++]; (~T*yH ~
else if(i2>r) e|~MJu+1
data[cur]=temp[i1++]; k4TWfl^}9
else if(temp[i1] data[cur]=temp[i1++]; !xM5 A[f
else aQk&#OQy
data[cur]=temp[i2++]; }[*'
} sE1cvAw9l
} gT+/nSrLV
wBPo{
} 2|1fb-AR
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改进后的归并排序: 5~Y`ikwxL
+^)v"@,VP
package org.rut.util.algorithm.support; jvT'N@
~5 ^Jv m
import org.rut.util.algorithm.SortUtil; D}-.<
#cbgp;,M{I
/** Rx%S<i;9
* @author treeroot ?b7\m":'
* @since 2006-2-2 *bkb-nKw
* @version 1.0 8v:{BHX
*/ R>Ra~b
public class ImprovedMergeSort implements SortUtil.Sort { gk]QR.
Jh[0xb
private static final int THRESHOLD = 10; HpwMm^
|WS)KR !
/* YJi%vQ*]
* (non-Javadoc) \& JZ >h
* R>' %}|v/
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Tc2.ciU
*/ Zg;$vIhn
public void sort(int[] data) { _z5/&tm_H
int[] temp=new int[data.length]; Io6/Fv>!
mergeSort(data,temp,0,data.length-1); GW2\YU^{
} \l+v,ELX=
%Bq~b$
private void mergeSort(int[] data, int[] temp, int l, int r) { Ebg8qDE
int i, j, k; :1v,QEb\
int mid = (l + r) / 2; 0D-`>_
if (l == r) F_-Lu]*
return; OLw]BJXYaE
if ((mid - l) >= THRESHOLD) ul{x|R
mergeSort(data, temp, l, mid); 8\"<t/_ W
else ez4!5&TzRm
insertSort(data, l, mid - l + 1); R!nf^*~
if ((r - mid) > THRESHOLD) RNIXQns-=S
mergeSort(data, temp, mid + 1, r); bMH~vR
else QV4|f[Ki%
insertSort(data, mid + 1, r - mid); >A#5` $i
=u~nLL
for (i = l; i <= mid; i++) { \0$+*ejz
temp = data; nD wh
} MqmQ52HR
for (j = 1; j <= r - mid; j++) { 4WT[(
temp[r - j + 1] = data[j + mid]; OV>&`puL
} |OQ]F
int a = temp[l]; 4;`z6\u9-
int b = temp[r]; PK\ZRl
for (i = l, j = r, k = l; k <= r; k++) { :X>Wd+lY:_
if (a < b) { -jH|L{Iyq}
data[k] = temp[i++]; ;hj lRQ\
a = temp; U}92%W?
} else { r@G*Fx8Z
data[k] = temp[j--]; 1?@HOu
b = temp[j]; 1U\ap{z@
} (s8b?Ol/
} )~2\4t4|g
} S^O9}<2g
O'4G'H)
/** W"\~O"a
* @param data +C~h(
* @param l 9a`LrB
* @param i M7#!Y=
*/ 7QO/; zL
private void insertSort(int[] data, int start, int len) { ;i@S}LwL
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); cILS
} {f06Ki
} -wU]L5uP
} xGs}hVlZiC
} 7# AIX],
_i_='dsyW/
堆排序： j~v`q5X
*)m:u:
package org.rut.util.algorithm.support; }*fBHzNN
c^}G=Z1@
import org.rut.util.algorithm.SortUtil; O|Uz)Y94
-K{R7
/** N{J 1C6
* @author treeroot }:8}i;#M
* @since 2006-2-2 gt{kjrTv&
* @version 1.0 ^s~)"2 g
*/ 2A_1E\
public class HeapSort implements SortUtil.Sort{ 9f~qD&~
T//xxH]w-
/* (non-Javadoc) Po?MTA
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) o30C\
*/ P2n8HFi
public void sort(int[] data) { wFMH\a
MaxHeap h=new MaxHeap(); `gSMb UgF
h.init(data); f:PlMv!{
for(int i=0;i h.remove(); TV{GHB!p"
System.arraycopy(h.queue,1,data,0,data.length); sL@\,]Y
} L('1NN2
/x49!8
private static class MaxHeap{ _V$'nz#>e
.?{no}u.
void init(int[] data){ -,")GA+[7
this.queue=new int[data.length+1]; *s4|'KS2o
for(int i=0;i queue[++size]=data; x^K4&'</
fixUp(size); cUq]PC$|
} Ic(qA{SM
} c~hH 7/v
L"ho|v9:
private int size=0; akvi^]x
pX%:XpC!h
private int[] queue; }r,M(Zr
DvH-M3
public int get() { # `=Zc7gf
return queue[1]; dgP eH8_
} R&cTMd
5Od%Jhtt
public void remove() { &ZD@-"@
SortUtil.swap(queue,1,size--); SXw r$)4_
fixDown(1); t/[lA=0 )2
} kgo#JY-4
file://fixdown 7 z
private void fixDown(int k) { O?OAXPK2
int j; /MtmO$.
while ((j = k << 1) <= size) { \=0;EI-j
if (j < size %26amp;%26amp; queue[j] j++; btg= # u
if (queue[k]>queue[j]) file://不用交换 ANPG3^w
break; L^e*_q2d:>
SortUtil.swap(queue,j,k); KeyKLkg>
k = j; `x=kb;
} <@`K^g;W
} xFUD9TM
private void fixUp(int k) { d '2JMdbc
while (k > 1) { nxN("$'cq
int j = k >> 1; 7h9oY<W
if (queue[j]>queue[k]) 1%M^MT%&
break; <;i&-,
SortUtil.swap(queue,j,k); RCqL~7C+ k
k = j; /,7#%D
} lJa-O
} [ 2@Lc3<
lU|ltnU
} h1>.w pr
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} %|@?)[;
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SortUtil： e7G>'K
N cHCcc
package org.rut.util.algorithm; Ct/6<
3sBWtz
import org.rut.util.algorithm.support.BubbleSort; w;VUP@Wm
import org.rut.util.algorithm.support.HeapSort; dFeGibI{
import org.rut.util.algorithm.support.ImprovedMergeSort; a[^dK-
import org.rut.util.algorithm.support.ImprovedQuickSort; Ahd{f!
import org.rut.util.algorithm.support.InsertSort; Kc9)Lzu+
import org.rut.util.algorithm.support.MergeSort; K~L"A]+
import org.rut.util.algorithm.support.QuickSort; gKU*@`6G
import org.rut.util.algorithm.support.SelectionSort; dkEnc
import org.rut.util.algorithm.support.ShellSort; 7.5\LTM>9e
uJ*|SSN~
/** r'}#usB(
* @author treeroot bVRxGn @l
* @since 2006-2-2 _}Gs9sHr0K
* @version 1.0 `).;W
*/ $AFiPH9
public class SortUtil { Z?",+|4
public final static int INSERT = 1; Q6Zh%\+h(
public final static int BUBBLE = 2; p|Fhh\,*`X
public final static int SELECTION = 3; D/{Spw@
public final static int SHELL = 4; .>zkS*oX4z
public final static int QUICK = 5; of<>M4/g4y
public final static int IMPROVED_QUICK = 6; Dc>)js|"
public final static int MERGE = 7; ;rta#pRn
public final static int IMPROVED_MERGE = 8; \t&6$"n(B6
public final static int HEAP = 9; Y@%6*uTLa
^_ZQf
public static void sort(int[] data) { Z42v@?R.!W
sort(data, IMPROVED_QUICK); J2#=`|t"
} kqAQrg]n
private static String[] name={ TAYt:
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" e$(i!G)
}; M/sqOhg
ELNA-ZKp
private static Sort[] impl=new Sort[]{ cfe[6N
new InsertSort(), zck |jhJ6
new BubbleSort(), 0\}j[-`pF
new SelectionSort(), <^ )0M
new ShellSort(), )@`w^\E_~_
new QuickSort(), z8"=W,2
new ImprovedQuickSort(), 8UL:C?eY
new MergeSort(), 9'8oOBqm3%
new ImprovedMergeSort(), VZlvmN
new HeapSort() +Vf|YLbhJ
}; v <Ze$^e&
=yNHJHRA#
public static String toString(int algorithm){ w)8@Tu:Q
return name[algorithm-1]; Q}.y"|^
} {}^ELw
{:FITF3o
public static void sort(int[] data, int algorithm) { 8"*$e I5
impl[algorithm-1].sort(data); (1}Ndo^;w
} Q6W)rJ[|
+m7x>ie)
public static interface Sort { FW.dHvNX
public void sort(int[] data); OB^2NL~Q~
} t@JPnA7~
G =4y!y
public static void swap(int[] data, int i, int j) { |f}NO~CA
int temp = data; yEqmB4^-
data = data[j]; tr/dd&(Y1
data[j] = temp; S&uL9)Glb
} d=KOV;~);
} /#se>4]