[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; NW 2`)e'
} ^eO/?D8~h
int i1=l; ^[Ka+E^Q
int i2=mid+1; O&|<2Qr
for(int cur=l;cur<=r;cur++){ -<5{wQE;|
if(i1==mid+1) (*Q:'2e
data[cur]=temp[i2++]; %8xRT@Q
else if(i2>r) Av5:/c.B
data[cur]=temp[i1++]; MpZ\j
else if(temp[i1] data[cur]=temp[i1++]; Vr( Z;YO
else a@qc?
data[cur]=temp[i2++]; >{:hadUH
} dY~z6bT
} DC-d@N+
CAs:>s '8
} a\}MJ5]
H, :]S-T
改进后的归并排序: c>^(=52Q
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package org.rut.util.algorithm.support; |m ?ZE:
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import org.rut.util.algorithm.SortUtil; G\;6n
NY^0$h
/** i-5,*0e6m
* @author treeroot ,R<9yEWm
* @since 2006-2-2 Rq[d\BN0.d
* @version 1.0 uh2_Rzln
*/ 73Jm
public class ImprovedMergeSort implements SortUtil.Sort { fCJjFL:
[?KGLUmTAI
private static final int THRESHOLD = 10; 5~:/%+F0=
B,w ZI4oi*
/* Ox-eB
* (non-Javadoc) emnT;kJ>
* Pn[oo_)s
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ]SRpMZ
*/ A0k?$ko
public void sort(int[] data) { <EN9s
int[] temp=new int[data.length]; urjf3h[%
mergeSort(data,temp,0,data.length-1); 8j3Y&m4^
} qa )BbK^i
9_O4yTL
private void mergeSort(int[] data, int[] temp, int l, int r) { 23>[-XZb[O
int i, j, k; lNa+NtQu
int mid = (l + r) / 2; 1nskf*Z
if (l == r) %>i:C-l8
return; *pS 7,Hm
if ((mid - l) >= THRESHOLD) F!0iM)1o
mergeSort(data, temp, l, mid); ` K{k0_{
else ';/J-l/SE
insertSort(data, l, mid - l + 1); 0Q_*Z (
if ((r - mid) > THRESHOLD) [{BY$"b#:
mergeSort(data, temp, mid + 1, r); bD:0k.`
else L1/`/
insertSort(data, mid + 1, r - mid); Cg]),S
!+^'Ej)z
for (i = l; i <= mid; i++) { Y`bTf@EP>
temp = data; sAL ]N][Y
} 31G0B_T
for (j = 1; j <= r - mid; j++) { Y6sX|~Zy
temp[r - j + 1] = data[j + mid]; +W*~=*h|
} y@!o&,,mq
int a = temp[l]; g)#{<#*2
int b = temp[r]; G,|!&=Pe|E
for (i = l, j = r, k = l; k <= r; k++) { o1$u;}^|
if (a < b) { 4<F z![>
data[k] = temp[i++]; &EQhk9j
a = temp; LtMM89u
} else { }\7UU?@n
data[k] = temp[j--]; ~!r;?38V`
b = temp[j]; NSB6 2
} Kh(`6 f
} #[lhem]IC
} G!r)N0?_f
&R_7]f+%)
/** Q]xkDr?
* @param data \BXzmok
* @param l +C{-s
* @param i eNAxVF0
*/ ?s^3o{!<W
private void insertSort(int[] data, int start, int len) { YoKyiO!
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); +)jll#}?
} _q27 3QG/"
} !EB<N<P"t
} hb5K"9Y
} ;J5z
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堆排序： #lP8/-s^
ZLv/otf:|"
package org.rut.util.algorithm.support; vv @m{,7#Y
e}e8WR=B
import org.rut.util.algorithm.SortUtil; ns8s2kYcm
x 6`!
/** "+"=iwEAz
* @author treeroot +&`W\?.~
* @since 2006-2-2 !=,4tg`
* @version 1.0 "S%t\
*/ EX`P(=zD
public class HeapSort implements SortUtil.Sort{ E6A"Xo
'3(^Zv
/* (non-Javadoc) G-Tmk7m
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }#O!GG{
*/ oY18a*_>M1
public void sort(int[] data) { '+cI W(F?
MaxHeap h=new MaxHeap(); y~ =H`PAE
h.init(data); `um,S
for(int i=0;i h.remove(); ^hC'\09=c
System.arraycopy(h.queue,1,data,0,data.length); 2ndn8_l
} \j>7x
37/n"\4
private static class MaxHeap{ `@h|+`h
~.m<`~u
void init(int[] data){ F3qK6Ah.
this.queue=new int[data.length+1]; /9w>:i81
for(int i=0;i queue[++size]=data; !LI<%P)
fixUp(size); ~9dpB>+
} L8QWEFB|
} %SM;B-/zHt
+J X;T(T
private int size=0; g\JJkXjD#
V0\[|E;F
private int[] queue; HgF;[rq3Q
)\fY1WD
public int get() { f&^(f1WO
return queue[1]; pIJXP$v3
} bV_nYpo
|@Tga_0p
public void remove() { #@S%?`4,
SortUtil.swap(queue,1,size--); N6Ud(8*
fixDown(1); &7aWVKon
} Z'JS@dV
file://fixdown B[t^u\Fk
private void fixDown(int k) { S\e&xUA;|
int j; xAQtX=FoX+
while ((j = k << 1) <= size) { C9n%!()>
if (j < size %26amp;%26amp; queue[j] j++; .V?:&_}_I6
if (queue[k]>queue[j]) file://不用交换 W(s4R,j
break; yw3"jdcl
SortUtil.swap(queue,j,k); Sjpx G@k
k = j; kXMp()N8`
} G'ykcB._
} }rTH<!j
private void fixUp(int k) { du3f'=q6|
while (k > 1) { _IYaMo.n
int j = k >> 1; %BqaVOKJ"f
if (queue[j]>queue[k]) k9^Hmhjw
break; IHl q27O
SortUtil.swap(queue,j,k); ^OR0Vp>L
k = j; N@q}eGe
} _kj]vbG^;
} "s*-dZO
J!6FlcsZm
} RLB3 -=9t
3$$E0`7.
} -4a9BE".
#WpkL]g2+%
SortUtil： z^gJy,T
K}VCFV
package org.rut.util.algorithm; j2Zp#E!
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import org.rut.util.algorithm.support.BubbleSort; wl Oeoi
import org.rut.util.algorithm.support.HeapSort; tli.g
import org.rut.util.algorithm.support.ImprovedMergeSort; )ZJvx%@i
import org.rut.util.algorithm.support.ImprovedQuickSort; &SY!qTxF
import org.rut.util.algorithm.support.InsertSort; l]nt@0+
import org.rut.util.algorithm.support.MergeSort; aV3:{oL
import org.rut.util.algorithm.support.QuickSort; vJkc/7
import org.rut.util.algorithm.support.SelectionSort; N%y i4
import org.rut.util.algorithm.support.ShellSort; ]b/]^1-(b
S&op|Z)1
/** U=on}W3V2
* @author treeroot gV_/t+jI
* @since 2006-2-2 ^u/%zL
* @version 1.0 K"}fD;3
*/ _]Hna<Ly
public class SortUtil { g*|j+<:7
public final static int INSERT = 1; %\As
public final static int BUBBLE = 2; \{,TpK.
public final static int SELECTION = 3; yzA05npTl
public final static int SHELL = 4; m7 =$*1k
public final static int QUICK = 5; GP|=4T}Bf
public final static int IMPROVED_QUICK = 6; R$awgSE
public final static int MERGE = 7; IP~!E_e}\
public final static int IMPROVED_MERGE = 8; Nkdv'e\
public final static int HEAP = 9; =8kmFXo
US6_5>/
public static void sort(int[] data) { 092t6D}
sort(data, IMPROVED_QUICK); R$a<=
} \INH[X#>
private static String[] name={ )*|/5wW1
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" j=_rUc'Me
}; K~x,so
T5BZD +Ta
private static Sort[] impl=new Sort[]{ G7-BeA8
new InsertSort(), I$Nh|eM
new BubbleSort(), l.[pnLD
new SelectionSort(), CI|lJ
new ShellSort(), kmuksT\)a
new QuickSort(), "cH RGJG#
new ImprovedQuickSort(), <P9fNBGa
new MergeSort(), Y4T")
new ImprovedMergeSort(), e_vsiT
new HeapSort() %B3~t>
}; $6QIYF""
_B4&Fb.
public static String toString(int algorithm){ GN.Oa$
return name[algorithm-1]; |Lq8cA)|y
} 3P>gDQP
_`$LdqgE
public static void sort(int[] data, int algorithm) { )vr@:PE
impl[algorithm-1].sort(data); j)1yv.
} uGKjZi
^6 6!f 5^W
public static interface Sort { H^_,e= j
public void sort(int[] data); N!A20Bv
} tiK?VwaKI
}fpya2Xt
public static void swap(int[] data, int i, int j) { #%"q0"
int temp = data; 0MQ= Rt
data = data[j]; z(PUoV:?
data[j] = temp; ZTC>Ufu2!
} Vs>Pv$kW
} w7nt $L5