[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; ^bLRVp1
} 9V.u-^o&
int i1=l; \`w4|T
int i2=mid+1; u(!&:A9JFd
for(int cur=l;cur<=r;cur++){ oW;6h.
if(i1==mid+1) ]LZ`LL'#Y_
data[cur]=temp[i2++]; k;5Pom
else if(i2>r) o-cAG{.WC
data[cur]=temp[i1++]; eVl'\aUd
else if(temp[i1] data[cur]=temp[i1++]; J/6`oh?,Q
else |D.O6?v@
data[cur]=temp[i2++]; ph2$oO 6,
} Oi} T2I
} &Sp -w?kM
nPUqMn'
} {>bW>RO)
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改进后的归并排序: 5%}wV,Y
j:bgR8%e
package org.rut.util.algorithm.support; "EV!>^Z
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import org.rut.util.algorithm.SortUtil; gf+d!c(/
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/** Xq4|uuS-O
* @author treeroot T%Pp*1/m7
* @since 2006-2-2 c '\SfW<
* @version 1.0 jn.C|9/mj
*/ @d&/?^dp6
public class ImprovedMergeSort implements SortUtil.Sort { j(#%tIv
z* <y5
private static final int THRESHOLD = 10; |p00j|k
X#w%>al
/* p#KW$OQ]8
* (non-Javadoc) ^JR;epVJ
* A%\tiZe
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) J`*iZvW#Bx
*/ Q# ?wXX47
public void sort(int[] data) { _#_ E^!
int[] temp=new int[data.length]; ~LQ[4h<J !
mergeSort(data,temp,0,data.length-1); ; "3+YTtp
} ~np,_yI
nNmsr=y5
private void mergeSort(int[] data, int[] temp, int l, int r) { j'p1q
int i, j, k; \/|)HElKR
int mid = (l + r) / 2; *Ul*%!?D
if (l == r) 19q{6X`x
return; @InZ<AW>|
if ((mid - l) >= THRESHOLD) !SsHAE|
mergeSort(data, temp, l, mid); OU7 %V)X5
else y}08~L?2
insertSort(data, l, mid - l + 1); 0D~ C 5}/4
if ((r - mid) > THRESHOLD) tD$lNh^
mergeSort(data, temp, mid + 1, r); 2-0$FQ@/
else +1 eCvt:,
insertSort(data, mid + 1, r - mid); m?[5J)eR
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for (i = l; i <= mid; i++) { F&;
temp = data; 5f:DN\ ]
} XUV!C7
for (j = 1; j <= r - mid; j++) { i.1U|Pi
temp[r - j + 1] = data[j + mid]; DDd|T;8
} 7L:7/
int a = temp[l]; o5aLUWi-
int b = temp[r]; W}'WA
for (i = l, j = r, k = l; k <= r; k++) { DW(~Qdk
if (a < b) { lnbmoHv
data[k] = temp[i++]; k6\^p;!Y
a = temp; C+NF9N
} else { {w^uWR4f
data[k] = temp[j--]; jQj,q{eA
b = temp[j]; E&~nps8e
} giavJ|
} 7 boJ*
} kVDe6},D7
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/** Rn+4DcR
* @param data 1QJBb \
* @param l 7k=fZ$+O
* @param i mW`oq
*/ g2p"LWex-
private void insertSort(int[] data, int start, int len) { T,JA#Rk|1N
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); UmKX*T9
} ?HR%bngK
} X21dX`eMN
} 84&XW
} ~y0R'oi
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堆排序： 7]22"mc
d @rs3Q1z
package org.rut.util.algorithm.support; t"s5\;IJ
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import org.rut.util.algorithm.SortUtil; %kU'hzLg
q9}m!*8e
/** eK`PxoTI-I
* @author treeroot ,|To#umym>
* @since 2006-2-2 .\5$MIF
* @version 1.0 (%<'A
*/ ]re'LC!d
public class HeapSort implements SortUtil.Sort{ %c6E-4b
"<l<& qp
/* (non-Javadoc) G5'_a$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) yFpySvj}
*/ q^bO*bv
public void sort(int[] data) { Ttv9"z
MaxHeap h=new MaxHeap(); ;rBp1[qVe
h.init(data); 5JFV%odo
for(int i=0;i h.remove(); :%-,Fxl4
System.arraycopy(h.queue,1,data,0,data.length); /r.6XZs6
} LP`CS849z2
PJ 9%/Nrh
private static class MaxHeap{ E20 :uZ7\
RazBc.o<
void init(int[] data){ .gT4_
this.queue=new int[data.length+1]; YL^Z4: p
for(int i=0;i queue[++size]=data; XizPMN5a
fixUp(size); LD55n%|0`H
} FrZ]=:
} d(L{!mm
@"1}16b#f
private int size=0; d#T?Q_3b
[BXyi
private int[] queue; uu}-"/<~7
wRVD_?
public int get() { 30 7fBa
return queue[1]; ^Omfe
} |f NMs
|Cf mcz(56
public void remove() { =,Ttw>
SortUtil.swap(queue,1,size--); Y%IJ8P^Y
fixDown(1); G :4;y7
} &(O06QL
file://fixdown kfj%
private void fixDown(int k) { v*P[W_.
int j; \p6 }
while ((j = k << 1) <= size) { v["3
if (j < size %26amp;%26amp; queue[j] j++; wOHEv^,
if (queue[k]>queue[j]) file://不用交换 .s};F/(diD
break; dERc}oAh(
SortUtil.swap(queue,j,k); *bZ\@Qm
k = j; F1}
} 'TX M{RGw
} QHQj/)J8
private void fixUp(int k) { %3,xaVN
while (k > 1) { ?~)Ak`=
int j = k >> 1; 0>Fqx{!heq
if (queue[j]>queue[k]) B| Q6!
break; rl|Q)A{
SortUtil.swap(queue,j,k); ~t9Mh^gij
k = j; ? ICDIn
} /J;]u3e|
} k!13=Gh
fq Y1ggL
} 3'@&c?Fye
$Q4=37H+
} nW&$~d
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SortUtil： 2nx9#B*/T
vPsq<l}
package org.rut.util.algorithm; X,Zd=
#{w5)|S#JD
import org.rut.util.algorithm.support.BubbleSort; g8Aj `O
import org.rut.util.algorithm.support.HeapSort; D-iUN
import org.rut.util.algorithm.support.ImprovedMergeSort; lJj&kVHb
import org.rut.util.algorithm.support.ImprovedQuickSort; MOLO3?H(
import org.rut.util.algorithm.support.InsertSort; !Mil?^
import org.rut.util.algorithm.support.MergeSort; yiO31uQt
import org.rut.util.algorithm.support.QuickSort; ;z0"Ox=7
import org.rut.util.algorithm.support.SelectionSort; bs:QG1*.
import org.rut.util.algorithm.support.ShellSort; N ^f}ui i
uRGB/ju^E
/** ,TJ/3_lH
* @author treeroot =kO@Gk?
* @since 2006-2-2 =phiD&=
* @version 1.0 fKYKW?g;)Z
*/ HPTHF
public class SortUtil { "GLYyC
public final static int INSERT = 1; \^m.dIPdO
public final static int BUBBLE = 2; LT(?#)D
public final static int SELECTION = 3; TMY{OI8a
public final static int SHELL = 4; >D3zV.R
public final static int QUICK = 5; Hir(6Bt
public final static int IMPROVED_QUICK = 6; (uT^Nn9L=
public final static int MERGE = 7; /Tcb\:`9
public final static int IMPROVED_MERGE = 8; ^yD"d =z
public final static int HEAP = 9; &vkp?UH
fMzYFM'i
public static void sort(int[] data) { {]@Qu"M
sort(data, IMPROVED_QUICK); r8+*|$K
} )(.%QSA\C
private static String[] name={ X}?ESjZJ
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" (NM6micc
}; <>&89E%j'
c&A]pLn+x
private static Sort[] impl=new Sort[]{ 7BK46x
new InsertSort(), 776 nWw)
new BubbleSort(), !*8#jy
new SelectionSort(), PAr|1i)mB
new ShellSort(), .f+9 A>
new QuickSort(), RSFJu\0}N
new ImprovedQuickSort(), jDJ.
new MergeSort(), Hz5;Ruw'
new ImprovedMergeSort(), sM0c#YK?
new HeapSort() Kv1vx*>
}; <]c#)xg
o6/Rx#A
public static String toString(int algorithm){ .&L^J&V
return name[algorithm-1]; ^^'[%ok
} 9Yd-m
UXQb={
public static void sort(int[] data, int algorithm) { { $X X
impl[algorithm-1].sort(data); Jtpa@!M
} \ bC}&Iz6
Kj=;>u
public static interface Sort { RAdvIIQp:
public void sort(int[] data); pB[%:w/@l:
} Q{8qm<0g
SUo^c1)G
public static void swap(int[] data, int i, int j) { A mvw`u>
int temp = data; 0|GpZuGO9
data = data[j]; a2[8wv1
data[j] = temp; $xQ"PJ2
} yX3PUO9
} phe"JNML