[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; 6'|NALW
} `L @`l
int i1=l; ub-vtRpm
int i2=mid+1; *#Iqz9X.Y3
for(int cur=l;cur<=r;cur++){ ug?#Oa
if(i1==mid+1) ^,#MfF6
data[cur]=temp[i2++]; "|GX%>/
else if(i2>r) -:Jn|=
data[cur]=temp[i1++]; ]m\:XhI*<
else if(temp[i1] data[cur]=temp[i1++]; b`^mpB*6R
else ?Lem|zo
data[cur]=temp[i2++]; oF.H?lG7`
} $yZ(ws
} Q oWjC
KV|ywcGhT
} d[&Ah~,
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改进后的归并排序: eR!K8W
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package org.rut.util.algorithm.support; jO5Wemqf
{%8=qJ3@
import org.rut.util.algorithm.SortUtil; E#`JH
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/** IWnyqt(k
* @author treeroot k(wJ6pc
* @since 2006-2-2 J Sms \
* @version 1.0 2KSt4oa
*/ s/OXZ<C|
public class ImprovedMergeSort implements SortUtil.Sort { *Edr\P
9S{?@*V
private static final int THRESHOLD = 10; z1LY|8$G
A5YS "i
/* <Q?_],ip
* (non-Javadoc) .GuZV'
* qD>D
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) =ve, !
*/ C<hb{$@
public void sort(int[] data) { \2AXW@xE
int[] temp=new int[data.length]; TmdRB8N
mergeSort(data,temp,0,data.length-1); `bEum3l\6]
} -P$E)5?^
0u8(*?
private void mergeSort(int[] data, int[] temp, int l, int r) { 5U.,iQ(d
int i, j, k; ?`Som_vKO
int mid = (l + r) / 2; UdX aC= Q
if (l == r) OuU]A[r
return; ?r}!d2:dX
if ((mid - l) >= THRESHOLD) FUKE.Uxd
mergeSort(data, temp, l, mid); u^uo=/
else 9Jp"E5Ql)
insertSort(data, l, mid - l + 1); Tp%4{U/0`
if ((r - mid) > THRESHOLD) p&(~c/0
mergeSort(data, temp, mid + 1, r); ^g*/p[
else <=&7*8u0+
insertSort(data, mid + 1, r - mid); G+l9QaFv
+ywd(Tuzm
for (i = l; i <= mid; i++) { eE[/#5tK
temp = data; ?mW;%d~]
} -cnlj
for (j = 1; j <= r - mid; j++) { *!x/ia9
temp[r - j + 1] = data[j + mid]; +hd1|qa4
} P%xz"l i
int a = temp[l]; `-)Fx<e
int b = temp[r]; o)IcAqN$H
for (i = l, j = r, k = l; k <= r; k++) { vh6#Bc)i%w
if (a < b) { h}$]3/5H
data[k] = temp[i++]; 4!tHJCq"
a = temp; m#(ve1E
} else { 8v']>5S]#
data[k] = temp[j--]; m7~[f7U
b = temp[j]; 1w|V'e?kb
} &)|3OJ'o
} o*1t)HL<
} &-6D'@
k0R;1lZ0n
/** 1">]w2je:
* @param data =v]eQIp
* @param l "6%vVi6
* @param i 4C_-MJI
*/ blA]z!FU
private void insertSort(int[] data, int start, int len) { hX@.k|Yd
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); bNO/CD4
} 6Bfu89
} IWcYa.=tZ
} >SZ9,K4Gs
} ^,KN@
Q.[^5 8
堆排序： #%g~fh
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package org.rut.util.algorithm.support; ICgyCsZ,
$\@yH^hL
import org.rut.util.algorithm.SortUtil; 5PlTf?Ao
t#h<'?\E
/** dc0Ro,
* @author treeroot RU'DUf
* @since 2006-2-2 6axmH~_
* @version 1.0 C&ivjFf
*/ v`$9;9
public class HeapSort implements SortUtil.Sort{ WtTwY8HC
P'6(HT>F?
/* (non-Javadoc) !S',V&Yb
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #UH7z 4u
*/ ^ok;<fJ
public void sort(int[] data) { lYu1m
MaxHeap h=new MaxHeap(); ;DKwv}
h.init(data); l@om2|B
for(int i=0;i h.remove(); &xqr&(o
System.arraycopy(h.queue,1,data,0,data.length); B$)6X
} s/K}]F
-ijQTB
private static class MaxHeap{ X+K$y:UZ
Tl3{)(ezx
void init(int[] data){ 0R2 AhA#
this.queue=new int[data.length+1]; 0Fh*8a}?b
for(int i=0;i queue[++size]=data; tnmuCz
fixUp(size); N+PW,a
} ?%h JZm;
} B"I>mw
:*!u\lV\
private int size=0; Y2Y2>^
f.=4p^
private int[] queue; pstQithS
w%k)J{\
public int get() { ^q,KRut
return queue[1]; f6Wu+~|Y
} X?.bE!3=
~Rcd
public void remove() { z~xN]=
SortUtil.swap(queue,1,size--); ?Ib/}JST
fixDown(1); h tn2`
} J7.bFW'
file://fixdown ]Nvtiw 6
private void fixDown(int k) { DwZt.*
int j; ys;e2xekg
while ((j = k << 1) <= size) { @"HR"@pX
if (j < size %26amp;%26amp; queue[j] j++; @:xO5L}Io
if (queue[k]>queue[j]) file://不用交换 D.<CkDB
break; &hba{!`y
SortUtil.swap(queue,j,k); WL}6YSC
k = j; 5e,Dk0d
} W&4`eB/4}
} H9w*U
private void fixUp(int k) { g}3c r.
while (k > 1) { *ma/_rjK
int j = k >> 1; Em@h5V
if (queue[j]>queue[k]) K.R2)o`
break; }FMl4 _}u
SortUtil.swap(queue,j,k); IO xj$?%l
k = j; -&kQlr
} lrh6lt)
} fu=}E5ScK
tTyu,%/m
} .KT+,Y
#Y}Hh7.<
} .tN)H1.:B
2>O2#53ls0
SortUtil： J6[x(T
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package org.rut.util.algorithm; gqD`1/
P+3G*M=}
import org.rut.util.algorithm.support.BubbleSort; ".xai.trr
import org.rut.util.algorithm.support.HeapSort; s80_e
import org.rut.util.algorithm.support.ImprovedMergeSort; /@RnCjc'
import org.rut.util.algorithm.support.ImprovedQuickSort; uU.9*B=H9
import org.rut.util.algorithm.support.InsertSort; B;;D(NH
import org.rut.util.algorithm.support.MergeSort; pLzsL>6h
import org.rut.util.algorithm.support.QuickSort; *!9/`zW
import org.rut.util.algorithm.support.SelectionSort; :/vB,JC
import org.rut.util.algorithm.support.ShellSort; U&3*c+B4
!icpfxOpjQ
/** OV8b~k4=
* @author treeroot Ti3BlWQH
* @since 2006-2-2 {u.V8%8
* @version 1.0 0uU%jN$
*/ kM3BP& 3m1
public class SortUtil { MmWJYF=
public final static int INSERT = 1; &OhKx
public final static int BUBBLE = 2; o@LjSQ5!
public final static int SELECTION = 3; qqzQKN
public final static int SHELL = 4; : 6>H\
public final static int QUICK = 5; HB`pK'gz
public final static int IMPROVED_QUICK = 6; v[a#>!;s
public final static int MERGE = 7; I9F[b#'Pn
public final static int IMPROVED_MERGE = 8; DJQ]NY|
public final static int HEAP = 9; 1~ SY
N@MeaO
public static void sort(int[] data) { GPR`=]n& &
sort(data, IMPROVED_QUICK); HqXo;`Yy}
} E;4Ns
private static String[] name={ 2hJ{+E.m
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" M+hc,;6
}; jq0tMTb%L
0"2 [I
private static Sort[] impl=new Sort[]{ 7-o=E=
new InsertSort(), (uG4W|?p
new BubbleSort(), : l>Ue&
new SelectionSort(), @>9p2u)=
new ShellSort(), TLSy+x_gX
new QuickSort(), B?0{=u
new ImprovedQuickSort(), ~M'\9
new MergeSort(), j^%i?BWw
new ImprovedMergeSort(), btOTDqG`a
new HeapSort() =H,cwSE+%
}; 7t04!dD}
ooZ-T>$
public static String toString(int algorithm){ <go~WpA|r
return name[algorithm-1]; qz0v1057#
} 4[J3HLQ
,#wVqBEk
public static void sort(int[] data, int algorithm) { 5R=lTx/Hj
impl[algorithm-1].sort(data); #Y5I_:k
} F7;xf{n<
S-rqrbr|AT
public static interface Sort { tJwF h6
public void sort(int[] data); l#~FeD
} /5x`TT
T),:8/
public static void swap(int[] data, int i, int j) { huF L [
int temp = data; ,g,jY]o
data = data[j]; @zJI0_Bp
data[j] = temp; BL8\p_U
} 5./ (fgx>
} -ufmpq.