[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; vA]W|sLF9
} A.EbXo/
int i1=l; s0k`p<q
int i2=mid+1; xK6n0] A
for(int cur=l;cur<=r;cur++){ 9Bw|(J
if(i1==mid+1) Y[$!`);Ye
data[cur]=temp[i2++]; ^wc"&;=c|
else if(i2>r) /iJ4{p
data[cur]=temp[i1++]; <F`>,Pm
else if(temp[i1] data[cur]=temp[i1++]; k|lcc^[0
else PEuIWXr
data[cur]=temp[i2++]; 8\5 T3AF
} zY('t!u8
} a+!tT!g&I
/eOzXCSws
} \0vr>C
VI'hb'2
改进后的归并排序: -< &D
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package org.rut.util.algorithm.support; DIzH`|Y
-2A(5B9Fq
import org.rut.util.algorithm.SortUtil; gm[z[~X@
lS'-xEv?
/** 8=Z9T<K
* @author treeroot _q{c##Kf
* @since 2006-2-2 ZsOIH<}S
* @version 1.0 Bb}fj28
*/ s#tZg
public class ImprovedMergeSort implements SortUtil.Sort { h?;T7|^
_J? Dq
private static final int THRESHOLD = 10; )>`G
P:aJ#
/* :kf`?u
* (non-Javadoc) zOa_X~!@
* =MLcm^b
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2VJR$Pao
*/ }t%!9hr5D
public void sort(int[] data) { WUsKnf
int[] temp=new int[data.length]; Wv/%^3
mergeSort(data,temp,0,data.length-1); AbYqf%~7`l
} 8_6Q~
!gv`FE9y
private void mergeSort(int[] data, int[] temp, int l, int r) { naw0$kXTA
int i, j, k; 4@ML3d/
int mid = (l + r) / 2; qh2ON>e;
if (l == r) .b-f9qc=
return; cvfr)K[0
if ((mid - l) >= THRESHOLD) YA +E\
mergeSort(data, temp, l, mid); |Clut~G
else ?hWwj6i&
insertSort(data, l, mid - l + 1); D6Goa(!9d
if ((r - mid) > THRESHOLD) p-zXpK"
mergeSort(data, temp, mid + 1, r); w`il=ZAC
else +{W>i;U
insertSort(data, mid + 1, r - mid); /s[l-1zW
PV/77{'
for (i = l; i <= mid; i++) { d)R:9M}v
temp = data; I9mvte
} 75T7+:p
for (j = 1; j <= r - mid; j++) { /`6ZAom9
temp[r - j + 1] = data[j + mid]; Tp-l^?O-p
} Yl#Rib
int a = temp[l]; (jFGa2{
int b = temp[r]; #P?6@\
for (i = l, j = r, k = l; k <= r; k++) { OVko+X`
if (a < b) { ,XIz?R>;c
data[k] = temp[i++]; =|%Cu&
a = temp; |&[L?
} else { 'iGzkf}j
data[k] = temp[j--]; L.2/*H#
b = temp[j]; vpld*TL*
} )6Ny1x+
} K!'AkTW+-
} l*kPOyB
G-He" 4& $
/** _-9@qe
* @param data Jnna$6G)B
* @param l u9}1)9
* @param i ?I[8'
*/ jGEt+\"/QJ
private void insertSort(int[] data, int start, int len) { y6IXdW
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ;zIP,PMM
} 839IRM@'5
} yI ld75S`
} 8ZKo_I\
} hlJq-*6'
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堆排序： $P(v{W)
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package org.rut.util.algorithm.support; |ZCn`9hvn
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import org.rut.util.algorithm.SortUtil; zD(`B+
3$m4q`J
/** mFSw@CC
* @author treeroot 9(5OeH6o?
* @since 2006-2-2 >layJt
* @version 1.0 AwTJJ0>
*/ z%e8K(
public class HeapSort implements SortUtil.Sort{ B';6r4I-
cFJ-Mkll
/* (non-Javadoc) QR Ei7@t
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;}1xn3THCn
*/ aS pWsT
public void sort(int[] data) { ,daKC
MaxHeap h=new MaxHeap(); *=wYuJ#
h.init(data); ObE,$_ k
for(int i=0;i h.remove(); ^.hoLwp.
System.arraycopy(h.queue,1,data,0,data.length); RtCkVxaEx
} .{=$!8|&I9
!O#dV1wAa
private static class MaxHeap{ cP}KU5j
#~=hn8
void init(int[] data){ N @#c,,
this.queue=new int[data.length+1]; 9!Ar`Io2@
for(int i=0;i queue[++size]=data; G <uyin>
fixUp(size); >^Yq|~[
} ;?6No(/
} N*`b%XGn3
;]w<&C!=
private int size=0; MzP7Py 8.
PNA\ TXT
private int[] queue; ~j#]tElb
ynB_"mg
public int get() { ,i0b)=!o
return queue[1]; Hsihytdj
} 581e+iC~<H
C:uz6i1
public void remove() { E!Zx#XP1
SortUtil.swap(queue,1,size--); Qq@G\eRo
fixDown(1); ?0 m\(#
} `iJhG^w9M
file://fixdown tU^kQR!
private void fixDown(int k) { eXkujjSw"
int j; h8Xg`C\
while ((j = k << 1) <= size) { #CnHf
if (j < size %26amp;%26amp; queue[j] j++; 8srBHslI
if (queue[k]>queue[j]) file://不用交换 T /mI[*1xI
break; Bcjx>#3?L
SortUtil.swap(queue,j,k); )'hH^(Yu
k = j; `-\/$M9s=
} 3GmeD/6
} xESjM1A)
private void fixUp(int k) { H%1$,]F
while (k > 1) { X<MO7I
int j = k >> 1; S8l1"/?aHE
if (queue[j]>queue[k]) c=;:R0_'t
break; 8`]=C~G
SortUtil.swap(queue,j,k); 1Fe^Qb5G
k = j; ~=wCwA|1
} 2qHf'
} `s]4AKBO
?+t1ME|
} 9~0^PzTA
)%X;^(zKM
} S/`%Q2za4
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SortUtil： /oL;YIoQX
kJAn4I.l
package org.rut.util.algorithm; Z/6qG0feJ
{&[9iIf
import org.rut.util.algorithm.support.BubbleSort; {u\%hpD_
import org.rut.util.algorithm.support.HeapSort; $3d}"D
import org.rut.util.algorithm.support.ImprovedMergeSort; BYM3jXWi0v
import org.rut.util.algorithm.support.ImprovedQuickSort; &5%dhc4&!&
import org.rut.util.algorithm.support.InsertSort; Dw2Q 'E
import org.rut.util.algorithm.support.MergeSort; ya -i^i\
import org.rut.util.algorithm.support.QuickSort; #RMI&[M
import org.rut.util.algorithm.support.SelectionSort; "{E qhR~
import org.rut.util.algorithm.support.ShellSort; =9G;PVk|
Q2p)7G
/** T}D<Sc
* @author treeroot &48_2Q"{
* @since 2006-2-2 #g5^SR|qE
* @version 1.0 {S<>&?XB
*/ }sxn72,
public class SortUtil { e9^2,:wLB
public final static int INSERT = 1; >~\w+^2f8
public final static int BUBBLE = 2; nd{R 9B
public final static int SELECTION = 3; t=R6mjb
public final static int SHELL = 4; gLL\F1|0x
public final static int QUICK = 5; jko"MfJ
public final static int IMPROVED_QUICK = 6; Q0{z).&\(e
public final static int MERGE = 7; [<wbbvXR
public final static int IMPROVED_MERGE = 8; (shK
public final static int HEAP = 9; -@IL"U6
plV7+?G
public static void sort(int[] data) { ~~8rI[/
sort(data, IMPROVED_QUICK); }Uf<ZXW
} C2<CWPn<
private static String[] name={ z{BA4sn
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" M;Wha;%E"
}; 2N~E' 25
1Xyp/X2rI
private static Sort[] impl=new Sort[]{ *C,N'M<u
new InsertSort(), |*,jU;NI
new BubbleSort(), &!y]:CC{
new SelectionSort(), Sd:.KRTu.
new ShellSort(), \,sg)^w@
new QuickSort(), >&H~nGP.
new ImprovedQuickSort(), TRKgBK$,
new MergeSort(), )Hf~d=GG
new ImprovedMergeSort(), MFg'YA2/
new HeapSort() nd+?O7~}(
}; S;A)C`X&
vv 7+>%
public static String toString(int algorithm){ |,}E0G.
return name[algorithm-1]; =Mhg
} $Kq<W{H3ut
9.0WKcwg
public static void sort(int[] data, int algorithm) { ZM~`Gd9K0E
impl[algorithm-1].sort(data); Qa$NBNxKl
} 00M`%c/
4^Ow^7N?
public static interface Sort { D{AFL.r{
public void sort(int[] data); [F|+(}
} /#yA%0=w
!*P&Eat
public static void swap(int[] data, int i, int j) { wO"GtVd
int temp = data; q{X T
data = data[j]; jX|=n.#q
data[j] = temp; DuF7HTN[K
} Ko}2%4on
} H4skvIl