[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; Iymz2
} evR=Z\ _
int i1=l; W6iIL:sp
int i2=mid+1; GkC88l9z
for(int cur=l;cur<=r;cur++){ z?aDOh
if(i1==mid+1) @gj5'
data[cur]=temp[i2++]; NAU<?q<)
else if(i2>r) Xo5L:(?K
data[cur]=temp[i1++]; i,HAXPi
else if(temp[i1] data[cur]=temp[i1++]; ,@;<u'1\G
else [y:LA~q
data[cur]=temp[i2++]; \'KzSkC8
} QezK&iJg
} ?l(hS\N,
zN:752d^+r
} Cf N; `
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改进后的归并排序: ,rdM{ r
: L>d]Hn
package org.rut.util.algorithm.support; re!CF8 q
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import org.rut.util.algorithm.SortUtil; ~h/U ;Da
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/** 0#7dm9
* @author treeroot ex1ecPpN
* @since 2006-2-2 LQjqwsuN{
* @version 1.0 WDZi @9X_
*/ ]5\vYk
public class ImprovedMergeSort implements SortUtil.Sort { x'qgpG}?]
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private static final int THRESHOLD = 10; >xjy P!bca
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/* MI}D%n*
* (non-Javadoc) qSd $$L^
* fm*Hk57
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 'nno)kQ"
*/ x,%&[6(
public void sort(int[] data) { S@#L!sT`u
int[] temp=new int[data.length]; -*A'6%`
mergeSort(data,temp,0,data.length-1); |3LMVN
} Q'VS]n
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private void mergeSort(int[] data, int[] temp, int l, int r) { h]#)41y<
int i, j, k; * y B-N;I
int mid = (l + r) / 2; O2e"TH3
if (l == r) y)}aySQK^
return; :]s] =q&]
if ((mid - l) >= THRESHOLD) M@\'Y$)Y{
mergeSort(data, temp, l, mid); ]@>|y2
else p"@|2a
insertSort(data, l, mid - l + 1); X`b5h}c
if ((r - mid) > THRESHOLD) gg(U}L ]:
mergeSort(data, temp, mid + 1, r); #<o#kJL
else EHZSM5hu
insertSort(data, mid + 1, r - mid); "Tv7*3>
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for (i = l; i <= mid; i++) { LDsYr]
temp = data; qAS^5|(b[
} Nt8(
for (j = 1; j <= r - mid; j++) { "x)DE,
temp[r - j + 1] = data[j + mid]; [XXN0+ /
} W<Lrfo&=Y]
int a = temp[l]; g$b*#
int b = temp[r]; .IXwa,
for (i = l, j = r, k = l; k <= r; k++) { y#+o*(=fRE
if (a < b) { ?la_ +;m
data[k] = temp[i++]; f#5JAR
a = temp; 8=~>B@'
} else { ShpnFuH
data[k] = temp[j--]; lI 1lP 1
b = temp[j]; lNb\^b
} ={^#E?
} oK6lCGM5
} tOw 0(-:iq
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/** +b+sQ<w?.
* @param data D;]%
* @param l 7&4,',0VL
* @param i L|LTsRIq
*/ arZIe+KW
private void insertSort(int[] data, int start, int len) { <Xx\F56zp
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); y~7lug
} TpgBS4q
} &pm{7nH
} `qTY
} >9`ep7
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堆排序： i7V~LO:gq
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package org.rut.util.algorithm.support; L])w-
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import org.rut.util.algorithm.SortUtil; cqx1NWlY
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/** `Ny8u")=
* @author treeroot (, "E9.
* @since 2006-2-2 $8k_M
* @version 1.0 keskD
*/ NrcCUZ .:N
public class HeapSort implements SortUtil.Sort{ LltguNM$
09Y?!,
/* (non-Javadoc) |@.<}/
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) BA,6f?ktXS
*/ s.'\&B[
public void sort(int[] data) { p;$9W+H0
MaxHeap h=new MaxHeap(); : !3y>bP)
h.init(data); Nl`ry2"<
for(int i=0;i h.remove(); C4]%pi
System.arraycopy(h.queue,1,data,0,data.length); 2<Bv=B
} S:/RYT"
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private static class MaxHeap{ OL5HofgNm
)H)Udhz
void init(int[] data){ CDnz &?
this.queue=new int[data.length+1]; /T[ICd2J
for(int i=0;i queue[++size]=data; CDj Dhs
fixUp(size); e"#D){k#
} 4Z9wzQ>
} ~+C?][T
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private int size=0; D^55:\4(
a +yI2s4Z
private int[] queue; pm~;:#z7
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public int get() { "H<#91^|
return queue[1]; NxO^VUD
} <0)ud)~u
Ch"8cl;Fm
public void remove() { 8? Wxd65)
SortUtil.swap(queue,1,size--); -WvgK"k
fixDown(1); e8mbEC(AK
} ^!o}>ls['
file://fixdown (M,VwwN
private void fixDown(int k) { Ir"Q%>K0f
int j; m\M+pjz
while ((j = k << 1) <= size) { o MkY#<Q}
if (j < size %26amp;%26amp; queue[j] j++; $'YKB8C
if (queue[k]>queue[j]) file://不用交换 Tw;qY
break; WwtE=od
SortUtil.swap(queue,j,k); yr2L
k = j; \&&(ytL
} ) Zo_6%
} 9,f<Nb(\
private void fixUp(int k) { 7G(f1Y
while (k > 1) { V}fKV6 v9
int j = k >> 1; > ' 0 ][~
if (queue[j]>queue[k]) 6h6?BQSE
break; wZ8 MhE
SortUtil.swap(queue,j,k); kN|5 J
k = j; ]/Yy-T#@
} &4&33D
} .#55u+d,
4z%#ZIy3
} rn:zKTyhw
!L. K)9I
} dP7Vsa+
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SortUtil： aq+IC@O
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package org.rut.util.algorithm; $>"e\L4Kp
`1bX.7K43
import org.rut.util.algorithm.support.BubbleSort; bro
import org.rut.util.algorithm.support.HeapSort; 3'*%R48P`
import org.rut.util.algorithm.support.ImprovedMergeSort; hr4ye`c j
import org.rut.util.algorithm.support.ImprovedQuickSort; Secq^#]8
import org.rut.util.algorithm.support.InsertSort; xVkTRCh
import org.rut.util.algorithm.support.MergeSort; {XD/8m(hN|
import org.rut.util.algorithm.support.QuickSort; 2FIR]@MQd
import org.rut.util.algorithm.support.SelectionSort; FaE#\Q
import org.rut.util.algorithm.support.ShellSort; DwmU fZp
HXfXb^~
/** $dh4T";
* @author treeroot *Ht*)l?
* @since 2006-2-2 D"XX920$~
* @version 1.0 \!JS7!+
*/ EEs-&
public class SortUtil { WAB0e~e:|Q
public final static int INSERT = 1; }PQSCl^I
public final static int BUBBLE = 2; 0GX10*t.
public final static int SELECTION = 3; 4s~HfxYT
public final static int SHELL = 4; #CA%]*l*F
public final static int QUICK = 5; y(nsyA
public final static int IMPROVED_QUICK = 6; 3<Z'F}lg
public final static int MERGE = 7; AwXt @!(
public final static int IMPROVED_MERGE = 8; !Wixs]od
public final static int HEAP = 9; 9Ue7 ~"=
%8bzs?QI
public static void sort(int[] data) { +an^e'
sort(data, IMPROVED_QUICK); ^{*f3m/
} 2Za,4'
private static String[] name={ w;c#drY7S
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" E {KS a
}; z_Wm HB
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private static Sort[] impl=new Sort[]{ [.j]V-61
new InsertSort(), #PslrA. E
new BubbleSort(), ]A]Ft!`6z
new SelectionSort(), n^AP"1l8?0
new ShellSort(), 7"F|6JP"$c
new QuickSort(), 4W!\4Va
new ImprovedQuickSort(), BjyXQ9D
new MergeSort(), _}zo /kDA
new ImprovedMergeSort(), z$c&=Q
new HeapSort() gX$0[ sIS.
}; p,w|=@=
B6ed,($&
public static String toString(int algorithm){ HkdN=q
return name[algorithm-1]; #7]o6
} W(2+z5z
qE0FgqRB
public static void sort(int[] data, int algorithm) { <mZrR3v'D
impl[algorithm-1].sort(data); to&N22a$
} \5Vp6^
%6A-OF
public static interface Sort { [A"H/Qztk
public void sort(int[] data); 'h^-t^:<>b
} #9$V 08
&[5n0e[
public static void swap(int[] data, int i, int j) { `RL,ZoYuu
int temp = data; 8 "_Bq
data = data[j]; @ /UOSU
data[j] = temp; h4aygc
} `6Ureui2?
} )W8L91-