[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; N g,j#
} }7X%'Bg=M
int i1=l; E"0>yl)
int i2=mid+1; >d6|^h'0
for(int cur=l;cur<=r;cur++){ mc3"`+o
if(i1==mid+1) 4+ig' |o
data[cur]=temp[i2++]; I:.s_8mH}
else if(i2>r) M3AXe]<eC1
data[cur]=temp[i1++]; Pc9H0\+Xk
else if(temp[i1] data[cur]=temp[i1++]; ]R*A
else @PU [:;
data[cur]=temp[i2++]; PW4q~rc=:
} ntY]SK%Z
} #;<Y[hR{P
Js;h%
} F}zDfY\-
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改进后的归并排序: ~s{$WL&
svSVG:48
package org.rut.util.algorithm.support; f 1d?.)
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import org.rut.util.algorithm.SortUtil; @XVTU
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/** Ep}s}Stlr}
* @author treeroot W8<%[-r
* @since 2006-2-2 tVjsRnb{
* @version 1.0 s@C}P
*/ =Sv/IXX\di
public class ImprovedMergeSort implements SortUtil.Sort { 1Z;iV<d
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private static final int THRESHOLD = 10; <QvOs@i*
@8 6f
/* +v\oOBB)
* (non-Javadoc) NO3/rJ6-
* j#6.Gq
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) qb4z T
*/ ;nGa.= "L
public void sort(int[] data) { o}!PQ#`M
int[] temp=new int[data.length]; ME dWLFf
mergeSort(data,temp,0,data.length-1); ry!!9Z>9n
} W4N{S.#!
XilS!,
private void mergeSort(int[] data, int[] temp, int l, int r) { he4(hX^
int i, j, k; CWlw0X
int mid = (l + r) / 2; M`>E|"<
if (l == r) 1"g<0 W
return; g5yJfRLxp
if ((mid - l) >= THRESHOLD) Lv%x81]K
mergeSort(data, temp, l, mid); 26nx`w?j(
else $C\BcKlmv
insertSort(data, l, mid - l + 1); :%.D78&
if ((r - mid) > THRESHOLD) ?8$Q-1=
mergeSort(data, temp, mid + 1, r); z@Y;r=v
else oQ#8nu{k
insertSort(data, mid + 1, r - mid); m2o0y++TjW
]tD]Wx%
for (i = l; i <= mid; i++) { v1[29t<I!
temp = data; =fbWz
} l\mPHA23
for (j = 1; j <= r - mid; j++) { OYd !v`<
temp[r - j + 1] = data[j + mid]; `]X>V,
} +0~YP*I`/
int a = temp[l]; vbNBLCwug
int b = temp[r]; 2|L&DF:G
for (i = l, j = r, k = l; k <= r; k++) { PdCEUh\>y
if (a < b) { 9my^Y9B
data[k] = temp[i++]; q7!{?\T%
a = temp; ] @'!lhLi
} else { q@qsp&0/
data[k] = temp[j--]; /ouPg=+Nl
b = temp[j]; e!Hhs/&!T
} _^;Z~/.
} : 'c&,oLY
} xmG<]WF>E
{FGj]*
/** yLGRi^d#
* @param data N$DkX)Z
* @param l *Uh!>Iv;
* @param i d@^ZSy>L2
*/ u"8yK5!
private void insertSort(int[] data, int start, int len) { Q@niNDaW2
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); zTp"AuNHN
} hc1N~$3!G
} `gJ(0#ac
} SIllU
} yr6V3],Tp
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堆排序： R=dC4;
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package org.rut.util.algorithm.support; [}:$yg
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import org.rut.util.algorithm.SortUtil; ]yu:i-SfP
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/** >0gW4!7Y
* @author treeroot pJ=#zsE0
* @since 2006-2-2 ;*N5Y}?j'
* @version 1.0 ),)lzN%!
*/ <GJbmRc|
public class HeapSort implements SortUtil.Sort{ m[$_7a5
Bwrx*J
/* (non-Javadoc) /{[o~:'p
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) mR~&)QBP.
*/ : +u]S2u{
public void sort(int[] data) { %)|s1B'd
MaxHeap h=new MaxHeap(); Fs{*XKv&lH
h.init(data); omFz@
for(int i=0;i h.remove(); @7u0v
System.arraycopy(h.queue,1,data,0,data.length); N;R^h? '
} LLI.8kn7
[RL9>n8f
private static class MaxHeap{ >sF)BoLc
4 :v=pZ
void init(int[] data){ 0a7Ppntb@
this.queue=new int[data.length+1]; 9!GM{
for(int i=0;i queue[++size]=data; .VqhV
fixUp(size); [?gP;,
} vIvIfE
} "N;EL0=
YQ}o?Q$z
private int size=0; . me;.,$#
.X&9Q9T=#
private int[] queue; ^pS~Z~[d/
jo7\`#(Q
public int get() { t:S+%u U
return queue[1]; z{543~Og59
} ni<(K 0~
~,Qp^"rlW
public void remove() { "~nZ GiK
SortUtil.swap(queue,1,size--); Zfw,7am/
fixDown(1); *Ly6`HZ9
} [;N'=]`
file://fixdown NlqImM=r,
private void fixDown(int k) { >~f]_puT
int j; d5b% W3
while ((j = k << 1) <= size) { N[hG8f
if (j < size %26amp;%26amp; queue[j] j++; QPx^_jA
if (queue[k]>queue[j]) file://不用交换 t-AmX)$
break; rOYx b }1
SortUtil.swap(queue,j,k); MA\V[32H
k = j; ;"I^ZFYX
} cNrg#Asen&
} /QQ*8o8
private void fixUp(int k) { Q59suL
while (k > 1) { ?0.NIu,,o
int j = k >> 1; +3gp%`c4
if (queue[j]>queue[k]) =wJX0A|
break; @WhHUd4s
SortUtil.swap(queue,j,k); =M1I>
k = j; !Cs_F&l"j
} qK+5NF|
} Sdo-nt
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} l{9Y
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} x;S @bY
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SortUtil： +q4O D$}
[^)g%|W
package org.rut.util.algorithm; OI*H,Z"
wkq 66?
import org.rut.util.algorithm.support.BubbleSort; y-k.U%
import org.rut.util.algorithm.support.HeapSort; [0of1eCSl
import org.rut.util.algorithm.support.ImprovedMergeSort; v19-./H^ j
import org.rut.util.algorithm.support.ImprovedQuickSort; 4*L_)z&4;
import org.rut.util.algorithm.support.InsertSort; @~e5<:|5#
import org.rut.util.algorithm.support.MergeSort; -=="<0c
import org.rut.util.algorithm.support.QuickSort; +vH4MwG$.&
import org.rut.util.algorithm.support.SelectionSort; J,hCvm
import org.rut.util.algorithm.support.ShellSort; mw!F{pw
'91/md5
/** 29rX%09T]
* @author treeroot {ax:RUQxy
* @since 2006-2-2 /z!%d%"
* @version 1.0 }C:r9?T
*/ E./2jCwI(Y
public class SortUtil { H|*m$|$,
public final static int INSERT = 1; [ 3Gf2_
public final static int BUBBLE = 2; \m,PA'nd/
public final static int SELECTION = 3; LLo;\WGZ
public final static int SHELL = 4; dG{A~Z z
public final static int QUICK = 5; g-A-kqo9
public final static int IMPROVED_QUICK = 6; r$1Qf}J3=
public final static int MERGE = 7; yevPHN"M
public final static int IMPROVED_MERGE = 8; ;jXgAAz7
public final static int HEAP = 9; *hx
yfSmDPh
public static void sort(int[] data) { hM{bavd
sort(data, IMPROVED_QUICK); `A>@]d
} +TJCLZ..
private static String[] name={ M{@(G5
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" zda 3 ,U2o
}; UZMd~|
uT{q9=w
private static Sort[] impl=new Sort[]{ P?\6@_ Z
new InsertSort(), @- xjfC\d
new BubbleSort(), ]'}L 1r
new SelectionSort(), )UR7i8]!0
new ShellSort(), VRMXtQ*1Dm
new QuickSort(), E.TAbD&5(
new ImprovedQuickSort(), pb}*\/s
new MergeSort(), &HW9Jn
new ImprovedMergeSort(), O?2DQY?jT
new HeapSort() +nL[MSw
}; ![1rzQvGDb
WLT"ji0w2
public static String toString(int algorithm){ TxD#9]Q`
return name[algorithm-1]; wz%-%39q%
} qna8|3eP
Y|n"dMrL
public static void sort(int[] data, int algorithm) { =euni}7a
impl[algorithm-1].sort(data); +rd+0 `}C
} e= AKD#
yAt^;
public static interface Sort { oxs#866x
public void sort(int[] data); ? k/`
} @5FQX
A&VG~r$
public static void swap(int[] data, int i, int j) { KPF1cJ2N
int temp = data; k:;r2f
data = data[j]; \dVOwr
data[j] = temp; v+XJ*N[W
} (HVGlw'`
} X8|,