[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; 3E!3kSh|
} bMqFrG
int i1=l; {wf5HA
int i2=mid+1; @/='BVb'T
for(int cur=l;cur<=r;cur++){ BoHNni
if(i1==mid+1) [*r=u[67F
data[cur]=temp[i2++]; ?JR?PW8
else if(i2>r) ?',GRaD
data[cur]=temp[i1++]; !fJy7Y
else if(temp[i1] data[cur]=temp[i1++]; , Q)
else *EFuK8 ;
data[cur]=temp[i2++]; $ou/ Fn
} 9r 5(
} <jh=W9.N_
SgQ(#y|vV
} FMT_X
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改进后的归并排序: *1*i5c
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package org.rut.util.algorithm.support; =Nr?F'<
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import org.rut.util.algorithm.SortUtil; <Kk?BRxi
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/** )k81
* @author treeroot OZ&SxR%q4
* @since 2006-2-2 _lfS"ae
* @version 1.0 lr)9U7
*/ K}p0$Lc
public class ImprovedMergeSort implements SortUtil.Sort { P}he}k&IR
C-&s$5MzGb
private static final int THRESHOLD = 10; 'N\nJz}
5dL!e<<
/* D&D-E~b^
* (non-Javadoc) N,&bBp
* S>d7q
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )qRE['M
*/ !z]{zM%
public void sort(int[] data) { UryHte
int[] temp=new int[data.length]; f;bVzti+w
mergeSort(data,temp,0,data.length-1); ,hCbx#h
} )4n]n:FjN
eRg;)[#0>$
private void mergeSort(int[] data, int[] temp, int l, int r) { >j&k:
int i, j, k; R+9 hog
int mid = (l + r) / 2; k>:\4uI|<\
if (l == r) SOluTFxUw
return; vtRz;~,Z
if ((mid - l) >= THRESHOLD) !#S"[q
mergeSort(data, temp, l, mid); XLlJ|xhY-K
else w]US-7
insertSort(data, l, mid - l + 1); Q$Q:Jm53
if ((r - mid) > THRESHOLD) |A2o$H
mergeSort(data, temp, mid + 1, r); YOUX
else ~oRT@E
insertSort(data, mid + 1, r - mid); H5be5
C-/+n5J
for (i = l; i <= mid; i++) { Sre:l'.
temp = data; )O>M~
} 1|$J>
for (j = 1; j <= r - mid; j++) { *nwH1FjH
temp[r - j + 1] = data[j + mid]; /Y[ b8f
} $I9U.~*
int a = temp[l]; nQG<OVRClS
int b = temp[r]; yjM!M|
for (i = l, j = r, k = l; k <= r; k++) { 8L*#zaSAf
if (a < b) { 22`e7
data[k] = temp[i++]; f+2mX"Z[F
a = temp; DK|/|C}6
} else { `*cJc6
data[k] = temp[j--]; :e\M~n+y
b = temp[j]; 9!6u Yf+
} |wuN`;gc"
} <4N E)!#
} Q;kl-upn~8
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/** b2~5LZ
* @param data G'Uq595'-
* @param l wYh]3
* @param i o)H| #9h5
*/ afjEN y1
private void insertSort(int[] data, int start, int len) { \<\147&)r
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); x#t?`
} LWV^'B_X-
} fF.+{-.
} vyT-!mC
} J$&2GAi
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堆排序： ULxgvq
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package org.rut.util.algorithm.support; ngzQVaB9
GZ.KL!,R!
import org.rut.util.algorithm.SortUtil; cpx:4R,
U \jFB*U
/** 0VIR=Pbp
* @author treeroot vSk1/
* @since 2006-2-2 % xBQX
* @version 1.0 }1NNXxQ
*/ ;s5JYR
public class HeapSort implements SortUtil.Sort{ \3O1o#=(
,N8SP 'R
/* (non-Javadoc) N^jr
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;B;wU.Y"
*/ R)%I9M,
public void sort(int[] data) { ~_ko$(;A
MaxHeap h=new MaxHeap(); && WEBQ
h.init(data); S*H @`Do%d
for(int i=0;i h.remove(); \_/dfmlIZ
System.arraycopy(h.queue,1,data,0,data.length); MFqb_q+
} 3*oZol/
"}:SXAZ5`
private static class MaxHeap{ :PBW=W
m2Wi "X(I_
void init(int[] data){ J?f7!F:8
this.queue=new int[data.length+1]; B8zc#0!1
for(int i=0;i queue[++size]=data; `bZgw
fixUp(size); ^C;ULUn3
} |43Oc:Ah+
} i \@a&tw
r^,"OM]
private int size=0; #}[NleTVt
U+VyH4"
private int[] queue; y.::d9v
iL'j9_w,
public int get() { l^rQo_alk
return queue[1]; D~ 7W
} Bu4@FIK!C
j_SUR)5
public void remove() { ]m#*4
SortUtil.swap(queue,1,size--); [vxHsY3z
fixDown(1); ubl)$jZ:Q
} _Pn 1n
file://fixdown ^NO4T
private void fixDown(int k) { 2W;2._
int j; c=p!2jJ1K~
while ((j = k << 1) <= size) { LVJn2t^
if (j < size %26amp;%26amp; queue[j] j++; VhU,("&pm
if (queue[k]>queue[j]) file://不用交换 c+:^0&l
break; LmPpt3[
SortUtil.swap(queue,j,k); )&ucX
k = j; ghW
} eqqnR.0
} ME*A6/h
private void fixUp(int k) { /$|-!e<5b\
while (k > 1) { o>HGfr,N
int j = k >> 1; |q Pu*vR
if (queue[j]>queue[k]) 2 e&M/{
break; eCG{KCM~_Z
SortUtil.swap(queue,j,k); mnU8i=v0A
k = j; FPu$Nd&\
} Tj!rAMQk
} fPG3$<Zr
h79~d%-
} h/*@ML+bB8
2g;Id.i>
} i>(TPj|
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SortUtil： )g`~,3G
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package org.rut.util.algorithm; &@'+h* b
@GF3g=
import org.rut.util.algorithm.support.BubbleSort; a?*pO`<J{
import org.rut.util.algorithm.support.HeapSort; *C.Kdf3w
import org.rut.util.algorithm.support.ImprovedMergeSort; >C`#4e?}
import org.rut.util.algorithm.support.ImprovedQuickSort; Fm+V_.H/;
import org.rut.util.algorithm.support.InsertSort; jwheJG
import org.rut.util.algorithm.support.MergeSort; }l_8~/9
import org.rut.util.algorithm.support.QuickSort; 5i%\m
import org.rut.util.algorithm.support.SelectionSort; .d+zF,02Z
import org.rut.util.algorithm.support.ShellSort; xxOhGA)
V9wL3*
/** %{0F.
* @author treeroot rnBp2'EM
* @since 2006-2-2 8( bK\-b
* @version 1.0 dEam|
*/ sk@aOv'*(
public class SortUtil { d"thM
public final static int INSERT = 1; nY,LQ0r
public final static int BUBBLE = 2; |Gr@Mi5
public final static int SELECTION = 3; P[r$KGz
public final static int SHELL = 4; {HjJ9ZGQ
public final static int QUICK = 5; c!mMH~#
public final static int IMPROVED_QUICK = 6; WnA Y<hZ|
public final static int MERGE = 7; =Ea,8bpn
public final static int IMPROVED_MERGE = 8; {8,_[?H
public final static int HEAP = 9; Q<(aU{
SZvC4lOn#
public static void sort(int[] data) { GZm=>!T
sort(data, IMPROVED_QUICK); DH:9iX'
} Ti>}To}B5
private static String[] name={ Ho $+[K
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" kH4m6p
}; fr&p0)85>B
j_S3<wEJ
private static Sort[] impl=new Sort[]{ *E-MJCv
new InsertSort(), i#PR Tbc
new BubbleSort(), mB%m<Zo\U
new SelectionSort(), ( geV(zT
new ShellSort(), N]&hw&R{Q
new QuickSort(), /buj(/q^#
new ImprovedQuickSort(), nPH\Lra
new MergeSort(), $9Gra#
new ImprovedMergeSort(), !(y(6u#
new HeapSort() Bf" ZmG9
}; SBY0L.
{~#d_!(
public static String toString(int algorithm){ uxL3 8d]
return name[algorithm-1]; 1yTw*vH F
} T#HF!GH]
"tu*(>'~5
public static void sort(int[] data, int algorithm) { W!1 B~NH#
impl[algorithm-1].sort(data); Ii>#9>!F
} }d@;]cps
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public static interface Sort { J!}R>mR
public void sort(int[] data); ajX] ui
} rw?wlBEG%
8yM8O #S
public static void swap(int[] data, int i, int j) { ?F~0\T,7
int temp = data; |*L/ m0'L
data = data[j]; 845\u&
data[j] = temp; (@S9>z4s
} |I3&a=,
} ER:K^ Za