[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; .Af H>)E
} 'QxPQcU
int i1=l; QliP9-im3
int i2=mid+1; YV"LM6`
for(int cur=l;cur<=r;cur++){ q.69<Rs
if(i1==mid+1) hSfLNvK
data[cur]=temp[i2++]; ff<adl-
else if(i2>r) eVB.g@%T
data[cur]=temp[i1++]; \'Ewn8Qv8
else if(temp[i1] data[cur]=temp[i1++]; MD=VR(P?eq
else Jej-b<HmQ
data[cur]=temp[i2++]; }*R.>jQ+Y
} "i/3m'<2
} rBovC
B)L;ja
} R;Gf3K
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改进后的归并排序: ffE&=eh)
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package org.rut.util.algorithm.support; /dt'iai~l
o;M-M(EZQ6
import org.rut.util.algorithm.SortUtil; wO3K2I]>0
dI|`"jl#
/** 7z4u?>pne*
* @author treeroot O4w:BWVsn
* @since 2006-2-2 {qkd63X
* @version 1.0 "J (.dg]"
*/ UONW3}-
public class ImprovedMergeSort implements SortUtil.Sort { >!|(n@
-(YdK8
private static final int THRESHOLD = 10; t(F] -[
#3o]Qo[Sc
/* 8ncgTCH:
* (non-Javadoc) GDj ViAFm
* ewb/Z[4
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4yu ^cix(
*/ niIjatT
public void sort(int[] data) { $S0eERga
int[] temp=new int[data.length]; 1*Ui=M4
mergeSort(data,temp,0,data.length-1); 9#AsSbBpf
} DG $._
"x$RTuWA9
private void mergeSort(int[] data, int[] temp, int l, int r) { ]Ak@!&hyak
int i, j, k; (iZE}qf7g
int mid = (l + r) / 2; 4x JOPu
if (l == r) 044*@a5f
return; #815h,nP+
if ((mid - l) >= THRESHOLD) fjAJys)Q
mergeSort(data, temp, l, mid); _,M:"3;Z
else ToHCS/J59
insertSort(data, l, mid - l + 1); 6!}tmdzR
if ((r - mid) > THRESHOLD) ?"no~(EB
mergeSort(data, temp, mid + 1, r); fYzOT,c
else c=T^)~$$
insertSort(data, mid + 1, r - mid); )A4WK+yD$z
3 TN?yP)
for (i = l; i <= mid; i++) { hC.7Z]
temp = data; %q@eCN
} ?wR;"
for (j = 1; j <= r - mid; j++) { d&p]O
temp[r - j + 1] = data[j + mid]; EMe6Z!k
} 2>l:: 8Pp
int a = temp[l]; 1;l&ck-Gg/
int b = temp[r]; !(hP{k ^g
for (i = l, j = r, k = l; k <= r; k++) { F%Lniv/N
if (a < b) { 6SMGXy*]^
data[k] = temp[i++]; Oifu ?f<r
a = temp; L30x2\C
} else { :ji_dQ8k
data[k] = temp[j--]; 9_rNJLj8y
b = temp[j]; +OF(CcA^
} 9Osjh G
} G^F4c{3c~
} k})Ag7c
hgE!)UE
/** KLXv?4!
* @param data <,l&),
* @param l !b*lL#s,Y
* @param i DsqsMlB{
*/ A>$VkGo
private void insertSort(int[] data, int start, int len) { ,LXuU8sB
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); !GMb~
} B7TA:K
} >Ge&v'~_|
} y'Xg"
} :x97^.eW~
`-4c}T
堆排序： "gdmRE{x
O@3EJkv
package org.rut.util.algorithm.support; f&(u[W
r]km1SrS
import org.rut.util.algorithm.SortUtil; ?N#mD
Rcf_31 L
/** /Z>#lMg\.
* @author treeroot &:8a[C2=
* @since 2006-2-2 zb~!> QIz{
* @version 1.0 C$)#s{*
*/ Iq_cs '
public class HeapSort implements SortUtil.Sort{ FgRlxz
GFx>xQk
/* (non-Javadoc) /g'F+{v
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) f6^H Q1SSt
*/ ]BCH9%zLj
public void sort(int[] data) { ,a< !d
MaxHeap h=new MaxHeap(); W*-+j*e|_P
h.init(data); 1d|+7
for(int i=0;i h.remove(); %|o4 U0c
System.arraycopy(h.queue,1,data,0,data.length); LKxyj@Eq
} " 9 h]P^
]gkI:scPA
private static class MaxHeap{ _i:yI-jA
_7]* 5Pxo
void init(int[] data){ .5|wy<
this.queue=new int[data.length+1]; //>f#8Ho
for(int i=0;i queue[++size]=data; 6I72;e^!
fixUp(size); +QuaQ% lA
} znFa4
} ?^2(|t9KU
zhKb|SV
private int size=0; 1>4'YMdZi
: UD<1fh
private int[] queue; ?A2#V(4
-O\!IXG^
public int get() { S*IF/ fu
return queue[1]; AlIFTNg:"
} Bh"o{-$p8`
C*b!E:
public void remove() { #)hM]=,e
SortUtil.swap(queue,1,size--); =5oE|F%
fixDown(1); vEvVT]g[V
} 5pI2G
file://fixdown 41^+T<+
private void fixDown(int k) { GG5wiN*2S
int j; ckBcwIXlP&
while ((j = k << 1) <= size) { Aj;Z &
if (j < size %26amp;%26amp; queue[j] j++; 5<GC
if (queue[k]>queue[j]) file://不用交换 M8ZpNa
break; :xm,Ok
SortUtil.swap(queue,j,k); C3u/8Mrt7
k = j; ~M3`mO+^U
} b/Z=FS2T
} CQW#o_\
private void fixUp(int k) { fDNiU"
while (k > 1) { D4ESo)15'
int j = k >> 1; /=*h\8c~
if (queue[j]>queue[k]) :,Q\!s!
break; 1CU-^j
SortUtil.swap(queue,j,k); A/|To!R
k = j; WOrz7x
} UIi;&[
} B?`Gs^Y{z
>Olg lUzA
} 4`yCvPu
IC{\iwO/~c
} 7;jwKA;k
"G].hKgbk*
SortUtil： ARGtWW~:
PxNp'PZr9
package org.rut.util.algorithm; &q^\*<B.^
"-88bF~
import org.rut.util.algorithm.support.BubbleSort; :3pJGMv(
import org.rut.util.algorithm.support.HeapSort; +3dWnBg?
import org.rut.util.algorithm.support.ImprovedMergeSort; e;GLPB
import org.rut.util.algorithm.support.ImprovedQuickSort; \ $;E,
import org.rut.util.algorithm.support.InsertSort; rkugV&BhV
import org.rut.util.algorithm.support.MergeSort; :hr% 6K7
import org.rut.util.algorithm.support.QuickSort; h.d-a/
import org.rut.util.algorithm.support.SelectionSort; fb3(9
import org.rut.util.algorithm.support.ShellSort; VNBf2Va
8yij=T*
/** VW:WB.K$
* @author treeroot AiKja>Fl<
* @since 2006-2-2 n}/?nP\%
* @version 1.0 :,Z'/e0&
*/ : 8dQ8p;
public class SortUtil { `2-6Qv
public final static int INSERT = 1; ySAkj-< /P
public final static int BUBBLE = 2; {9:[nqX
public final static int SELECTION = 3; zGzeu)d
public final static int SHELL = 4; N3dS%F,_
public final static int QUICK = 5; 1W3+ng
public final static int IMPROVED_QUICK = 6; )r2$!(NQ
public final static int MERGE = 7; ko<u0SjF)u
public final static int IMPROVED_MERGE = 8; %3b;`Oa
public final static int HEAP = 9; 8_byS<b8
KYa}k0tVAp
public static void sort(int[] data) { &O8vI,M
sort(data, IMPROVED_QUICK); )45~YDS;t
} E)w6ZwV
private static String[] name={ >=Bl/0YH
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 1g_p`(
}; LX f r
QA|87alh
private static Sort[] impl=new Sort[]{ =VIU
new InsertSort(), 5i71@?q;
new BubbleSort(), QFekj@
new SelectionSort(), /B"FGa04p(
new ShellSort(), 03N|@Tu
new QuickSort(), efzS]1Jpz
new ImprovedQuickSort(), 9;2{=,
new MergeSort(), +vf~s^
new ImprovedMergeSort(), @S?`!=M
new HeapSort() JG^fu*K
}; {7d(B1[1
-Cn x!g}
public static String toString(int algorithm){ *2,tGZ
return name[algorithm-1]; X|&v]mJ
} UP<B>Y1a
B1^9mV'O
public static void sort(int[] data, int algorithm) { ,zF^^,lO7
impl[algorithm-1].sort(data); (#e,tu
} o|7ztpr
gh9Gc1tKt
public static interface Sort { (V(8E%<c
public void sort(int[] data); H8!; XB
} My6a.Kl
!)r1zSY"g
public static void swap(int[] data, int i, int j) { "udA-;!@&
int temp = data; M4H~]Ftn
data = data[j]; Jb;@'o6
data[j] = temp; R1cOUV,y[/
} /Fj*sS8
} 5ho!}K