[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; <|VV8r93
} M#xol/)h
int i1=l; dXDuO
int i2=mid+1; ^'4I%L"
for(int cur=l;cur<=r;cur++){ -z>m]YDH
if(i1==mid+1) SHqz&2u
data[cur]=temp[i2++]; N`7+]T
else if(i2>r) /n3SE0Y
data[cur]=temp[i1++]; P7;q^jlB
else if(temp[i1] data[cur]=temp[i1++]; "QM2YJ55m`
else )H%RwV#
data[cur]=temp[i2++]; 9&1$\ZH
} f!JSb?#3
} bJFqyK:6
[q(}~0{"-
} kDc/]Zb%
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改进后的归并排序: K9S(Xip
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package org.rut.util.algorithm.support; NP$ D9#
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import org.rut.util.algorithm.SortUtil; G:Nwi=vN
bl4I4RB
/** $A>]lLo0
* @author treeroot K(_8oB784
* @since 2006-2-2 k(_^Lq f-
* @version 1.0 @EUvx
*/ ?nD]p!
public class ImprovedMergeSort implements SortUtil.Sort { QMwV6cA
|S3wCG
private static final int THRESHOLD = 10; CA,2&v"
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/* uEyus96 +
* (non-Javadoc) T_<:
* p?x]|`M
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %6TS_IpJ
*/ #Z}YQ$g
public void sort(int[] data) { U (A#}
int[] temp=new int[data.length]; Gvc/o$_
mergeSort(data,temp,0,data.length-1); b`|,rfq^AZ
} m<|fdS'@
sb</-']a
private void mergeSort(int[] data, int[] temp, int l, int r) { i[PksT#p
int i, j, k; 1"U.-I@
int mid = (l + r) / 2; 1#nY Z%
if (l == r) l!%V&HJV
return; Ol*|J
if ((mid - l) >= THRESHOLD) =${ImMwj
mergeSort(data, temp, l, mid); `5Em: 8 M
else Qz([\Xx:
insertSort(data, l, mid - l + 1); ;%O>=m'4
if ((r - mid) > THRESHOLD) [<VyH.
mergeSort(data, temp, mid + 1, r); g HKA:j`c
else kTo{W]9]
insertSort(data, mid + 1, r - mid); Q6fPqEX=
10r9sR
for (i = l; i <= mid; i++) { $H1igYc
temp = data; A"~Oi
} BV]$= e'
for (j = 1; j <= r - mid; j++) { wQ\bGBks
temp[r - j + 1] = data[j + mid]; =[`gfw
} ;>jOB>b{h
int a = temp[l]; XF99h&;9
int b = temp[r]; UsdUMt!u
for (i = l, j = r, k = l; k <= r; k++) { +=(@=PJ6
if (a < b) { }*56DX
data[k] = temp[i++]; L7s _3\
a = temp; 4,:)%KB"V
} else { \w2X.2b.F
data[k] = temp[j--]; {e83 A/{
b = temp[j]; 4m6%HV8{}[
} ' y_2"
} =v~$&@
} Vet<,;Te
Lq{/r+tt/
/** CV*
* @param data 2yndna-
* @param l $ZnVs@:S
* @param i G/V0Yn""
*/ /4,U@s)"/
private void insertSort(int[] data, int start, int len) { pe-%`1iC0>
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); XI;F=r}'
} RzqU`<//
} 6('xIE(R
} l7uEUMV
} ;`FR1KIg
n$3w=9EX*
堆排序： 8PvO_Gz5
u1/q8'RW
package org.rut.util.algorithm.support; 420cbD3a
vXibg
import org.rut.util.algorithm.SortUtil; wKAxUPzm
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/** "IJcKoB
* @author treeroot ?)FY7[x.
* @since 2006-2-2 LH>h]OTQF
* @version 1.0 KZwzQ"Hl
*/ yb'v*B]
public class HeapSort implements SortUtil.Sort{ v#$}3+KVC
&%@>S.
/* (non-Javadoc) ' g Fewo
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,pVq/1
*/ +fG~m:E
public void sort(int[] data) { DWu~%U8
MaxHeap h=new MaxHeap(); P:c'W?
h.init(data); @v n%
for(int i=0;i h.remove(); i|G /x
System.arraycopy(h.queue,1,data,0,data.length); ]C$$Cx)Ex
} q%wF=<W
z. xRJ
private static class MaxHeap{ 1DM$FG_Z-
^%Fn|U\u
void init(int[] data){ 7dXh,sD
this.queue=new int[data.length+1]; zM<yd#`yt8
for(int i=0;i queue[++size]=data; FSS~E [(DL
fixUp(size); Y~I6ee,\
} =8x-+u5}rK
} MpLn)
.;NoKO7)
private int size=0; h]?[}&
((tWgSZ3
private int[] queue; X$ 76#x
)LE#SGJP
public int get() { T2i\S9X
return queue[1]; [`=:uUf3
} $q$\
vmT6^G
public void remove() { 2Jn?'76`
SortUtil.swap(queue,1,size--); f'B#h;`
fixDown(1); LrnE6U9
} Dlo4Wy
file://fixdown p0j-$*F
private void fixDown(int k) { Kw,ln<)2
int j; }#9 |au`
while ((j = k << 1) <= size) { `pYL/[5
if (j < size %26amp;%26amp; queue[j] j++; 3Tr}t.mt
if (queue[k]>queue[j]) file://不用交换 ,:"c"
break; PoRL35
SortUtil.swap(queue,j,k); M@O<b-
k = j; T eBJ
} S3_QOL
} u^&,~n@n7
private void fixUp(int k) { 4L[-[{2
while (k > 1) { 0+"P1/
int j = k >> 1; 9NcC.}#-5
if (queue[j]>queue[k]) Lcy>!3q3~
break; >)S'`e4Gu
SortUtil.swap(queue,j,k); wfc+E9E
k = j; ru1FJ{n
} RaY=~g
} 8:t1%O$
%'<m[wf^ o
} kNTxYJ
R3} Z"
} aW#_"Y}v'
h*?/[XY
SortUtil： ^tKJ}}
K9f7,/
package org.rut.util.algorithm; %TRH,-@3h
n"Q fW~U
import org.rut.util.algorithm.support.BubbleSort; 2[$` ]{U
import org.rut.util.algorithm.support.HeapSort; <t4l5nr#
import org.rut.util.algorithm.support.ImprovedMergeSort; Wy,Tf*[
import org.rut.util.algorithm.support.ImprovedQuickSort; <=7^D
import org.rut.util.algorithm.support.InsertSort; vxx7aPjC
import org.rut.util.algorithm.support.MergeSort; f=*xdOB3
import org.rut.util.algorithm.support.QuickSort; h5R5FzY0&
import org.rut.util.algorithm.support.SelectionSort; H1g"09?h6o
import org.rut.util.algorithm.support.ShellSort; U0%m*i
gSu3\keF
/** OgBZoTT
* @author treeroot E[E[Za^Y
* @since 2006-2-2 RVb}R<yU+
* @version 1.0 Z )dz
*/ ZVmgQ7m
public class SortUtil { OQZ\/~o 5
public final static int INSERT = 1; ](H vx
public final static int BUBBLE = 2; B%d2tsDw
public final static int SELECTION = 3; 7U{g'<
public final static int SHELL = 4; [!E~pW%|n
public final static int QUICK = 5; ;yK:.Vg
public final static int IMPROVED_QUICK = 6; I@9k+JB
public final static int MERGE = 7; OM 5h>\9
public final static int IMPROVED_MERGE = 8; haMt2S2_B:
public final static int HEAP = 9; za@`,Yq
{BKr/) H
public static void sort(int[] data) { ;'J{ylRQ
sort(data, IMPROVED_QUICK); 9oA.!4q
} XDi[Iyj
private static String[] name={ ZICcZG_y
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" {,rVA(I@
}; f; 1C)
kKg%[zXS
private static Sort[] impl=new Sort[]{ g>*t"Rf:
new InsertSort(), y*Wl(w3
new BubbleSort(), E-q*u(IW
new SelectionSort(), z!6:Dt6^
new ShellSort(), l+1GA0'JP
new QuickSort(), |J#mgA}(
new ImprovedQuickSort(), d^.fB+)A3
new MergeSort(), (l3P<[[?
new ImprovedMergeSort(), &D 4Ci_6k
new HeapSort() _GK3]F0
}; kGSB6
H:HJHd"W
public static String toString(int algorithm){ `Dco!ih
return name[algorithm-1]; kf<5`8
} ?5L.]Isa5
[1*3 kt*h
public static void sort(int[] data, int algorithm) { Fv6<Cz6L
impl[algorithm-1].sort(data); )gR !G]Y
} W}U-u{Z
W+0VrH 0F
public static interface Sort { e-#!3j!'
public void sort(int[] data); 7}<057Xn'
} s$ 2@|;
*rk!`n&
public static void swap(int[] data, int i, int j) { Mo2b"A;}|
int temp = data; L4'FL?~I
data = data[j]; V5{^R+_)Ya
data[j] = temp; L)o7~M
} g.d%z
} z@0*QZ.y1