[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; !mFx= +
} imcq H
int i1=l; cU\Er{ k
int i2=mid+1; <{rRcFR
for(int cur=l;cur<=r;cur++){ t#s?:
if(i1==mid+1) Eq>3|(UT
data[cur]=temp[i2++]; w_30g6tA
else if(i2>r) cr!6qv1
data[cur]=temp[i1++]; =$`xis\
else if(temp[i1] data[cur]=temp[i1++]; _akC^hT
else f&+=eUp
data[cur]=temp[i2++]; K-Bf=7F,
} J(*QtF
} +QcgLq
w,L PM+
} 5m,{?M`
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改进后的归并排序: neW_mu;~Z
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package org.rut.util.algorithm.support; <1tFwC|4BJ
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import org.rut.util.algorithm.SortUtil; A|sTnhp~
i_OoR"J%
/** fm2,Mx6
* @author treeroot 5>.)7D%
* @since 2006-2-2 [uxhdR`T
* @version 1.0 wT?.Mte
*/ G)28#aH
public class ImprovedMergeSort implements SortUtil.Sort { $YvT* T$_
8zew8I~s
private static final int THRESHOLD = 10; G%N/]]ll
BXgAohg!
/* /E'cy
* (non-Javadoc) h?wNmLre
* ]=v_u9;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) mx@F^
*/ y=y=W5#;77
public void sort(int[] data) { FoM4QO
int[] temp=new int[data.length]; \tFg10
mergeSort(data,temp,0,data.length-1); xao'L
} \-kX-Tq
=w HU*mK
private void mergeSort(int[] data, int[] temp, int l, int r) { 2XJn3wPi
int i, j, k; fsa
int mid = (l + r) / 2; l1^/Q~u
if (l == r) XWvT(+J
return; 9tmYrhb$
if ((mid - l) >= THRESHOLD) #yZZ$XOk
mergeSort(data, temp, l, mid); ?c)PBJ+]
else V6l*!R
insertSort(data, l, mid - l + 1); Ojj:YLlY>
if ((r - mid) > THRESHOLD) 0'!v-`.
mergeSort(data, temp, mid + 1, r); m#SDB6l
else hQ&S*f&='
insertSort(data, mid + 1, r - mid); M0`nr}g
$3BCA)5:
for (i = l; i <= mid; i++) { R }M'D15
temp = data; =jvM$
} /sY(/ JE
for (j = 1; j <= r - mid; j++) { WrhC q6
temp[r - j + 1] = data[j + mid]; +}c '4hRv
} 4,L(
int a = temp[l]; IVD1mk
int b = temp[r]; Q!/<=95E
for (i = l, j = r, k = l; k <= r; k++) { dzDh V{
if (a < b) { I}/o`oc
data[k] = temp[i++]; Gv[W)+3f
a = temp; 'Im7^!-d
} else { PbOLN$hP
data[k] = temp[j--]; 9`}Wp2
b = temp[j]; [\CQ_qs|
} Ms5m.lX
} 6U;pYWht
} X1U7$/t
=jdO2MgSg*
/** ^,zE Nqg7
* @param data qq}EXq^
* @param l IdTeue
* @param i 4kGA`XhS*
*/ n k]tq3.[
private void insertSort(int[] data, int start, int len) { v0!>":
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); >B$ZKE
} f !t2a//
} ty]JUvR@
} \Ku=a{Ne
} bHcb+TR3
b u%p,u!
堆排序： QC0^G,9.
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package org.rut.util.algorithm.support; nt\6o?W
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import org.rut.util.algorithm.SortUtil; ]c{Zh?0
_3<J!$]&p
/** lbrob' '+
* @author treeroot ^ ab%Mbb
* @since 2006-2-2 u`Djle
* @version 1.0 VKy:e.
*/ B`OggdE
public class HeapSort implements SortUtil.Sort{ 9Ue3 %?~c
1 GUF,A+_O
/* (non-Javadoc) r$=MBeT
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) _F xq
*/ GutH}Kz"&
public void sort(int[] data) { ,p\^n`A32
MaxHeap h=new MaxHeap(); Z!=/[,b
h.init(data); P\;lH"9
for(int i=0;i h.remove(); B&A4-w v
System.arraycopy(h.queue,1,data,0,data.length); {:40Jf
} qF=D,Dlz
[oOZ6\?HB
private static class MaxHeap{ P(G$@},W
B9|!8V
void init(int[] data){ L*bUjR,C
this.queue=new int[data.length+1]; <lZyUd
for(int i=0;i queue[++size]=data; AbUPJF"F
fixUp(size); >FPE%X0+
} |Q:$G!/
} qgrRH'
I_.(&hMn
private int size=0; x{<WJ|'B
$7gzu4f
private int[] queue; I z~#G6]M
a`(6hL3IT
public int get() { Woa5Ov!n0
return queue[1]; x3>K{
} CF9a~^+%
b!SGQv(^M
public void remove() { 6NJ"ty9Bp
SortUtil.swap(queue,1,size--); |$Dt6{h
fixDown(1); 5%D:wS1
} h>= e<H?f
file://fixdown bW<_K9"
private void fixDown(int k) { [CBA Lj5
int j; yXS ~PG
while ((j = k << 1) <= size) { k\|G%0Jw
if (j < size %26amp;%26amp; queue[j] j++; <aa#OX
if (queue[k]>queue[j]) file://不用交换 Nkn0G_
break; 4q[C' J
SortUtil.swap(queue,j,k); NuI9"I/
k = j; uSbOGhP
} 9Am&G
} w/KHS#~
private void fixUp(int k) { 1g9Qvz3
while (k > 1) { W%b<(T;
int j = k >> 1; <ro0}%-z>M
if (queue[j]>queue[k]) qc~6F'?R
break; 8#'<SB
SortUtil.swap(queue,j,k); hXM8`iFW5
k = j; -h^FSW($-R
} )v;>6(
} ('Wo#3b$
)u]J`.OA
} 4;Z`u.1
ZH/^``[.
} w{)*'8oCB
f!ehq\K1k
SortUtil： 3 8pw
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package org.rut.util.algorithm; soW.
7&XU]I
import org.rut.util.algorithm.support.BubbleSort; %!%3jo0t
import org.rut.util.algorithm.support.HeapSort; +oBf\!{cW
import org.rut.util.algorithm.support.ImprovedMergeSort; r4dG83qg
import org.rut.util.algorithm.support.ImprovedQuickSort; "RuJlp
import org.rut.util.algorithm.support.InsertSort; i;lzFu)G
import org.rut.util.algorithm.support.MergeSort; |vz<FR6
import org.rut.util.algorithm.support.QuickSort; _IOeO
import org.rut.util.algorithm.support.SelectionSort; &+6XdhX
import org.rut.util.algorithm.support.ShellSort; \c/jp5=}
k#R}^Q
/** }M?GqA=
* @author treeroot sY7:Lzs.,
* @since 2006-2-2 D/:~#)
* @version 1.0 Z!G_" 3
*/ rJ ?Y~Q
public class SortUtil { mm/U9hbp%
public final static int INSERT = 1; ?;>s<
public final static int BUBBLE = 2; rtv\Pf|
public final static int SELECTION = 3; xb0hJ~e
public final static int SHELL = 4; ^tsIgK^9H
public final static int QUICK = 5; vi@a87w>
public final static int IMPROVED_QUICK = 6; Ttn=VX{ \
public final static int MERGE = 7; yxQxc5/X)
public final static int IMPROVED_MERGE = 8; #9EpQc[4
public final static int HEAP = 9; GV6!`@<
l*uNi47|
public static void sort(int[] data) { qd~)Ya1
sort(data, IMPROVED_QUICK); \.myLkm
} b')CGqbbmT
private static String[] name={ H)tYxW
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" <%hSBDG!x
}; f<9H#S:
#!rng]p
private static Sort[] impl=new Sort[]{ 8U0y86q>)E
new InsertSort(), iU9de
new BubbleSort(), OgyETSN8C
new SelectionSort(), d?WA}VFU
new ShellSort(), dMw7Lp&
new QuickSort(), `B) ~
new ImprovedQuickSort(), XD{U5.z>y
new MergeSort(), 1""9+4
new ImprovedMergeSort(), !tCw)cou
new HeapSort() 6xr$
}; T9KzVxHp5
'[I_Iu#,
public static String toString(int algorithm){ 8HX(1nNj}
return name[algorithm-1]; )+wBS3BC
} 4LtFv)i
YoGnk^$
public static void sort(int[] data, int algorithm) { `j(\9j ok
impl[algorithm-1].sort(data); QUb#;L@okn
} n%I%Kbw
!1C3{
public static interface Sort { s6OnHX\it7
public void sort(int[] data); *6e`km
} JTNQz
)s,L:{<
public static void swap(int[] data, int i, int j) { !~04^(
int temp = data; p&B98c
data = data[j]; &zlwV"W
data[j] = temp; UA>~xJp=
} 6/hY[a!
} !Y!Cv %