[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; oXCZpS
} EYwDv4H,g
int i1=l; %-zAV*>
int i2=mid+1; 8vN}v3HV&
for(int cur=l;cur<=r;cur++){ fO!S^<9,-
if(i1==mid+1) T<p,KqH
data[cur]=temp[i2++]; B{ i5UhxD
else if(i2>r) W]8tp@
data[cur]=temp[i1++]; Dxc`K?M
else if(temp[i1] data[cur]=temp[i1++]; S-FoyID\H
else \O]1QM94Y
data[cur]=temp[i2++]; <K8$00lm
} ` ,B&oV>
} e/;1<5tfj
4o:
} ^1&xt(G
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改进后的归并排序: $,vZX u|Qw
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package org.rut.util.algorithm.support; !fFmQ\|)4S
#}^kMD >
import org.rut.util.algorithm.SortUtil; Y(>]7
{.W$<y (j7
/** e`1,jt'
* @author treeroot -j%!p^2j9
* @since 2006-2-2 _IAvFJI
* @version 1.0 S9sFC!s1g
*/ R5QSf+/T4
public class ImprovedMergeSort implements SortUtil.Sort { l8n}&zX
u8Ul +u
private static final int THRESHOLD = 10; |?c v5l7E
|TOz{
/* $qN+BKd]3
* (non-Javadoc) cJ 5":^O
* i!/V wGg
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) C[j'0@~V:B
*/ T)o)%Yv
public void sort(int[] data) { `jR= X
int[] temp=new int[data.length]; @Q"%a`mKH
mergeSort(data,temp,0,data.length-1); &hmyfH&S
} c;,jb
(7nWv43
private void mergeSort(int[] data, int[] temp, int l, int r) { &A=q_
int i, j, k; _ ?f~UvK
int mid = (l + r) / 2; U!@3['
if (l == r) _7SOl.5ZE
return; 6gS<h\h0
if ((mid - l) >= THRESHOLD) )J/,-p
mergeSort(data, temp, l, mid); s[:e '#^
else Sr_]R<?
insertSort(data, l, mid - l + 1); dQ*3s>B[
if ((r - mid) > THRESHOLD) whW"cFg
mergeSort(data, temp, mid + 1, r); f"h{se8C
else a;p3Me7
insertSort(data, mid + 1, r - mid); LC5NB{b\%>
f\oB/
for (i = l; i <= mid; i++) { A"S{W^iL
temp = data; %YhZ#>WT
} w < p
for (j = 1; j <= r - mid; j++) { &6/# O
temp[r - j + 1] = data[j + mid]; xzdqE
} NQq$0<7.=W
int a = temp[l]; GXC:~$N
int b = temp[r]; zJ42%0g
for (i = l, j = r, k = l; k <= r; k++) { JLT^0wBB
if (a < b) { C& 0iWY\a
data[k] = temp[i++]; /nEh,<Y)
a = temp; E Kks8
} else { [wAI;=.
data[k] = temp[j--]; ,HXY|fYr
b = temp[j]; TY"=8}X1
} 6xSdA;<+]
} wU_e/+0h
} Q7`}4c)
qw[)$icP
/** [Q,E( s
* @param data hV_eb6aj}P
* @param l #$(F&>pj
* @param i ^{8r(1,
*/ ?6B n&qa
private void insertSort(int[] data, int start, int len) { ' }rUbJo
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 8D eRs#
} z65|NO6JW.
} SP9_s7LL
} xW*L^97 ;
} >\hu1C|W
W:{1R&$l
堆排序： = >)S\Dfi
a4FvQH#j
package org.rut.util.algorithm.support; heiIb|z
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import org.rut.util.algorithm.SortUtil; 5haJPWG|'
xMDx<sk
/** 8$<jd^w
* @author treeroot fU_itb(
* @since 2006-2-2 [QA@XBy6
* @version 1.0 0qSd#jO
*/ AE1!u{
public class HeapSort implements SortUtil.Sort{ y5>859"h
U3MfEM!x
/* (non-Javadoc) :(,uaX>{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ny17(Y =
*/ xd\k;nq
public void sort(int[] data) { w> `3{MTQ
MaxHeap h=new MaxHeap(); j{EN %
h.init(data); vINm2%*zJ
for(int i=0;i h.remove(); $trvNbco
System.arraycopy(h.queue,1,data,0,data.length); ]ERPWW;^
} Ia:n<sZU
1]#qxjZ~
private static class MaxHeap{ [;II2[5 ,
]V J$;v'{[
void init(int[] data){ 3dNOXk,#
this.queue=new int[data.length+1]; 9RwD_`D(MN
for(int i=0;i queue[++size]=data; HF}%Ow
fixUp(size); } pE<P;\]k
} #/t^?$8\\
} T1?fC)
s=Pwkte
private int size=0; $-Q,@Bztq
q%,q"WU
private int[] queue; 0EfM~u
,g%2-#L%
public int get() { {E!ie{~
return queue[1]; r6&f I"Yg
} QbqEe/*$_
}X94M7+->
public void remove() { 49&p~g
SortUtil.swap(queue,1,size--); : 'M$:ZJ
fixDown(1); QkUq%}_0
} FR_R"p
file://fixdown =ZjF5,@
private void fixDown(int k) { x3O$eKy\|5
int j; @U'I_`LL
while ((j = k << 1) <= size) { DSad[>Uj],
if (j < size %26amp;%26amp; queue[j] j++; W4Nbl
if (queue[k]>queue[j]) file://不用交换 #+V-65v
break; <SmXMruU
SortUtil.swap(queue,j,k); mR:G,XytxM
k = j; ECqcK~h#E
} Y!* \=h6h
} B!H46w~
private void fixUp(int k) { A~&Tp
while (k > 1) { sG*1?
int j = k >> 1; 6j@3C`Yd
if (queue[j]>queue[k]) "P`V|g
break; F)g.CDQ!c
SortUtil.swap(queue,j,k); 4-z3+e
k = j; `|e?91@vEa
} wMNtN3
} 6"C$]kF?
f.cIhZF
} 4Mi~eL%D (
OoTMvZP[
} vBAds
7H~StdL/>
SortUtil： zz3Rld!b[
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package org.rut.util.algorithm; V6Ie\+@.\
U`sybtuBP'
import org.rut.util.algorithm.support.BubbleSort; VU`aH9g3(
import org.rut.util.algorithm.support.HeapSort; ykc$B5*
import org.rut.util.algorithm.support.ImprovedMergeSort; tK{2'e6x
import org.rut.util.algorithm.support.ImprovedQuickSort; !7t,(Id8
import org.rut.util.algorithm.support.InsertSort; ]}H;`H
import org.rut.util.algorithm.support.MergeSort; 4.2qt
import org.rut.util.algorithm.support.QuickSort; <<!XWV*m
import org.rut.util.algorithm.support.SelectionSort; pJ-/"Q|:i
import org.rut.util.algorithm.support.ShellSort; z(L\I
[3h~y7
/** &(3kwdI
* @author treeroot }6b=2Z}
* @since 2006-2-2 1wSJw
* @version 1.0 /M(FuV
*/ :{?8rA5
public class SortUtil { C5m6{Oo+-
public final static int INSERT = 1; v8p-<N)
public final static int BUBBLE = 2; CJ0j2e/
public final static int SELECTION = 3; ujsJ;\c
public final static int SHELL = 4; '|Dm\cy
public final static int QUICK = 5; VXlTA>a }
public final static int IMPROVED_QUICK = 6; bSsX)wHm
public final static int MERGE = 7; ]@_M)[ x
public final static int IMPROVED_MERGE = 8; A$vCm
public final static int HEAP = 9; z%5i^P
"&Ym(P
public static void sort(int[] data) { }8J77[>/
sort(data, IMPROVED_QUICK); T ) T0.c
} ?-[.H^]s~
private static String[] name={ 'eg?W_zu
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" &g;4;)p*8
}; 9^l_\:4
8&: *<
private static Sort[] impl=new Sort[]{ bv,_7UOG
new InsertSort(), ?<VahDBS+A
new BubbleSort(), f@Mm{3&.
new SelectionSort(), V4'G%!NY
new ShellSort(), ,y@`=
new QuickSort(), aGvD
new ImprovedQuickSort(), TWE$@/9)g
new MergeSort(), C^I h"S
new ImprovedMergeSort(), ciO^2X
new HeapSort() }XVz?6
}; "J^M@k\!
h3Kv0^{
public static String toString(int algorithm){ r!+-"hS!
return name[algorithm-1]; `r;e\Cp
} HI6;=~[
Q|Uq.UjY
public static void sort(int[] data, int algorithm) { Q| > \{M
impl[algorithm-1].sort(data); Wo=Q7~
} Rr+Y::E
KY$6=/?U_
public static interface Sort { mwLp~z%OX
public void sort(int[] data); 99 /fI
} ?rC^@)
jz(}P8
public static void swap(int[] data, int i, int j) { NMb`d0;(
int temp = data; -:wC920+
data = data[j]; E`%Ewt$Z
data[j] = temp; '}h[*IB}5
} ~$} `R=
} /Y|oDfv