[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; %~rEJB@{
} 3CCs_AO
int i1=l; ah>c)1DA*H
int i2=mid+1; B#K gU&Loo
for(int cur=l;cur<=r;cur++){ v{u3[c
if(i1==mid+1) Z8v\>@?5R
data[cur]=temp[i2++]; c&['T+X
else if(i2>r) c_/BS n
data[cur]=temp[i1++]; 5Rbl.5.A
else if(temp[i1] data[cur]=temp[i1++]; FP@_V-
else |t,sK aL
data[cur]=temp[i2++]; $BqiC!~
} (tK_(gO
} sh/,"b2!P
|G j.E
} K#3^GB3P
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改进后的归并排序: L+t / E`
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package org.rut.util.algorithm.support; }$ y.qqG
*zrT;jG
import org.rut.util.algorithm.SortUtil; m&)/>'W
rH}|~
/** $LP(\T([
* @author treeroot _i=*0Q
* @since 2006-2-2 Z{8%Cln
* @version 1.0 * #yF`_p
*/ K\xz|Gq
public class ImprovedMergeSort implements SortUtil.Sort { V@'Xj .ze
l@`k:?
private static final int THRESHOLD = 10; di\.*7l?
1k[_DQ=^l1
/* `?VK(<w0q
* (non-Javadoc) Gb')a/
* 9z,sn#-t
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) P`tOL#UeZL
*/ D#GuF~-F!R
public void sort(int[] data) { g#S X$k-O
int[] temp=new int[data.length]; E|=x+M1sH
mergeSort(data,temp,0,data.length-1); gS(3m_
} CL<-3y*
q<}IO
private void mergeSort(int[] data, int[] temp, int l, int r) { |nMjv]#
int i, j, k; =?]`Xo,v~
int mid = (l + r) / 2; @&jR^`Y.
if (l == r) \kE0h\
return; ys=2!P-[#
if ((mid - l) >= THRESHOLD) 175e:\Tw
mergeSort(data, temp, l, mid); %1&X+s3
else G^'We6<
insertSort(data, l, mid - l + 1); g;l K34{
if ((r - mid) > THRESHOLD) kNuvJ/St
mergeSort(data, temp, mid + 1, r); f6r!3y
else a1,)1y~
insertSort(data, mid + 1, r - mid); ?K-4T
PKlR_#EB?
for (i = l; i <= mid; i++) { .ATpwFal
temp = data; 3.movkj
} ]&D dy&V
for (j = 1; j <= r - mid; j++) { C eEhe
temp[r - j + 1] = data[j + mid]; 7mtx^
} "P7OD^(x/
int a = temp[l]; 9Og
int b = temp[r]; N8]DzE0%
for (i = l, j = r, k = l; k <= r; k++) { [I;C6p
if (a < b) { U|wST&rU|
data[k] = temp[i++]; 2j f!o
a = temp; ;CO qu#(
} else { F=\ REq
data[k] = temp[j--]; lz^Vi!|p
b = temp[j]; G}U <^]c
} B9(w^l$kZ|
} #( .G;e;w
} 4m~y%> &
x(?Rm,
/** E8C8kH]
* @param data (XK,g;RoEn
* @param l w,hm_aDq
* @param i GwO`@-}E
*/ .1(_7!m@
private void insertSort(int[] data, int start, int len) { kTjn%Sn,
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ;X}2S!7Ko
} 1_7p`Gxt[/
} 2K4Xu9-i:b
} <v1H1'gv
} Boj R"
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堆排序： SY95s
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package org.rut.util.algorithm.support; 7a[6@
p$"~vA .
import org.rut.util.algorithm.SortUtil; !S~)U{SSK
D)MFii1J~
/** (jKqwVs.:
* @author treeroot Az8b_:=
* @since 2006-2-2 K0>;4E>B
* @version 1.0 g Cp`J(2v:
*/ kNP-+o
public class HeapSort implements SortUtil.Sort{ Vc0j)3
G/ si( LK
/* (non-Javadoc) p*K #s1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) H2iIBGu|L
*/ k8G4CFg}wP
public void sort(int[] data) { PY|zN|
MaxHeap h=new MaxHeap(); ZQ"dAR/y
h.init(data); I484cR2.
for(int i=0;i h.remove(); 5VE=Oo#&
System.arraycopy(h.queue,1,data,0,data.length); .BjWZj
} B<~AUf*y
wmpQF<
private static class MaxHeap{ qKSR5 #
iK2f]h
void init(int[] data){ WiH8j$;xu
this.queue=new int[data.length+1]; y%|Ez
for(int i=0;i queue[++size]=data; aP(~l_
fixUp(size); H-t$A, [
} AK lra$
} Z/Wf
Wrbv<8}%c
private int size=0; ke@OG! M/
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private int[] queue; xJ#O|7N
xTk6q*NvT^
public int get() { ?taC !{
return queue[1]; uv5NqL&
} q'fOlq
RJ'za1@z;b
public void remove() { "r`2V-E
SortUtil.swap(queue,1,size--); ?Kmz urG
fixDown(1); NI/'SMj%
} @Y,t]
file://fixdown =Crl{Ax
private void fixDown(int k) { *56j'FX
int j; J_a2DM6d
while ((j = k << 1) <= size) { 51%Rk,/o
if (j < size %26amp;%26amp; queue[j] j++; *s, bz.[
if (queue[k]>queue[j]) file://不用交换 nVlZ_72d
break; 4]}d'x&
SortUtil.swap(queue,j,k); yC@PMyE]
k = j; H.hKh
} "#36-
} 4iSN.nxIZ
private void fixUp(int k) { EqHToD I3
while (k > 1) { Ag3+z+uS
int j = k >> 1; LD{~6RP
if (queue[j]>queue[k]) `4ga~Ch
break; 0^L:`[W+
SortUtil.swap(queue,j,k); |0^IX
k = j; Tb^1#O
} ?AO=)XV2
} >q')%j
fLRx{Nu
} X'.lh#&
?&6|imPE
} ']Czn._
O*2{V]Y @
SortUtil： Lcg1X3$G
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package org.rut.util.algorithm; ; p+C0!B2
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import org.rut.util.algorithm.support.BubbleSort; o7gZc/?n
import org.rut.util.algorithm.support.HeapSort; .$f0!` t
import org.rut.util.algorithm.support.ImprovedMergeSort; 8\)4waz$
import org.rut.util.algorithm.support.ImprovedQuickSort; 3Zz_wr6
import org.rut.util.algorithm.support.InsertSort; sw$JY}Q8x
import org.rut.util.algorithm.support.MergeSort; MB5V$toC
import org.rut.util.algorithm.support.QuickSort; >!PM5%G
import org.rut.util.algorithm.support.SelectionSort; mE+=H]`.p
import org.rut.util.algorithm.support.ShellSort; PMiu "
79Aa~+i'_
/** Oo!]{[}7
* @author treeroot kQ[23
* @since 2006-2-2 Q=<&ew
* @version 1.0 u3cg&lEgT
*/ >7?Lq<H
public class SortUtil { 0/fwAp
public final static int INSERT = 1; F&k<P>k
public final static int BUBBLE = 2; %YuFw|wO
public final static int SELECTION = 3; 0m4#{^Y
public final static int SHELL = 4; l7WZ" 6d
public final static int QUICK = 5; ee<'j~{A
public final static int IMPROVED_QUICK = 6; %}
public final static int MERGE = 7; ](+u'8
public final static int IMPROVED_MERGE = 8; q@mZ0D-
public final static int HEAP = 9; @Us#c 7/
Sw{rNzh%$
public static void sort(int[] data) { C:!&g~{cKi
sort(data, IMPROVED_QUICK); fX LsLh+~D
} aTaL|&(
private static String[] name={ }PMlG
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Qc Xw -
}; R{B5{~m>W@
U~|)=+%O
private static Sort[] impl=new Sort[]{ :p1_ij]ND
new InsertSort(), qe uc^+P;
new BubbleSort(), 98|1K>C
new SelectionSort(), %@I= $8j
new ShellSort(), ip|l3m$Mi
new QuickSort(), =m;cy0))
new ImprovedQuickSort(), HT_nxe`E
new MergeSort(), %~<F7qB
new ImprovedMergeSort(), mt *Dx
new HeapSort() >)`*:_{
}; KrTlzbw&p\
.%\R L/
public static String toString(int algorithm){ $-]9/Ct
return name[algorithm-1]; u\K`TWb%
} lo7>$`Q
?+]
public static void sort(int[] data, int algorithm) { L$]Y$yv
impl[algorithm-1].sort(data); 9:!V":8q
} >(gbUW
B.?@VF
public static interface Sort { 4E$6&,\
public void sort(int[] data); ?R@u'4yK
} V4*/t#L/
bM,%+9oz;
public static void swap(int[] data, int i, int j) { Z%{`j!!p
int temp = data; [Z[ p@Ux
data = data[j]; 2"Ki5
data[j] = temp; LD;! s
} 7U)w\A;~
} g s%[Cv