[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; *?bk?*?s
} =kb6xmB^t
int i1=l; %R|"Afa=
int i2=mid+1; ^+as\
for(int cur=l;cur<=r;cur++){ tw/#ENo
if(i1==mid+1) 6%.
data[cur]=temp[i2++]; .ts0LDk0f
else if(i2>r) R6Zj=l[
data[cur]=temp[i1++]; 8b(1ut{
else if(temp[i1] data[cur]=temp[i1++]; !(*a+ur&i
else 'q92E(
data[cur]=temp[i2++]; IE)"rTI)b
} [2'm`tZL
} v1nQs='
gr>o E#7
} (]Ye[j^"7
xIQ/$[&v
改进后的归并排序: MkDK/K$s
;T.s!B$Uu
package org.rut.util.algorithm.support; RM&H!E<#
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import org.rut.util.algorithm.SortUtil; ;tp]^iB#
S\9t4Ki_'
/** @0z0m;8
* @author treeroot @fqV0l!GR
* @since 2006-2-2 I f3{E
* @version 1.0 WQ[}&kY~
*/ +_X,uvR
public class ImprovedMergeSort implements SortUtil.Sort { #Pu@Wx
G#w^:UL
private static final int THRESHOLD = 10; Kx- s0cw
f6B-~x<l
/* \\S/NA
* (non-Javadoc) dK}WM46$
* #0bO)m+NZ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *p&^!ct
*/ ({%oih
public void sort(int[] data) { Fm<jg}>MAd
int[] temp=new int[data.length]; IvTzPPP
mergeSort(data,temp,0,data.length-1); Vvm=MBgN
} QqiJun_m
VYamskK[G:
private void mergeSort(int[] data, int[] temp, int l, int r) { P+dA~2k
int i, j, k; rQ~\~g[tP
int mid = (l + r) / 2; 1BQ0M{&
if (l == r) fvcW'T}r
return; Zc'|!pT _
if ((mid - l) >= THRESHOLD) /m`}f]u
mergeSort(data, temp, l, mid); s\'y-UITi1
else p)B33ZzC
insertSort(data, l, mid - l + 1); 6a4'xq7
if ((r - mid) > THRESHOLD) CmEpir{}(
mergeSort(data, temp, mid + 1, r); erx5j\
else ~;M)qR?]W
insertSort(data, mid + 1, r - mid); PiMKu|,3
d/D,P=j"
for (i = l; i <= mid; i++) { 0]AN;
temp = data; Go>wo/Sb
} BBHK
for (j = 1; j <= r - mid; j++) { *16<M)7
temp[r - j + 1] = data[j + mid]; '|l%rv
} Bo`Tl1K#
int a = temp[l]; {=3J/)='
int b = temp[r]; X'fuF2owd
for (i = l, j = r, k = l; k <= r; k++) { -S"5{N73
if (a < b) { n*4lz^LR
data[k] = temp[i++]; oZTgN .q
a = temp; 4k8*E5cx
} else { <9P4}`%)3
data[k] = temp[j--]; M|\^UF2e
b = temp[j]; I2f?xJ2/Z
} ~xGoJrF\
} 1T ( u
} Kv(z4z
]@v}y&
/** :e*DTVv8
* @param data !fY7"E{%%
* @param l <W>++< -
* @param i *7ZGq(O
*/ dj'm, k b
private void insertSort(int[] data, int start, int len) { 9\HR60V
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); sI_7U^"[
} eGm:)
} ]' Y|Nl
} !p9)CjQ"
} I>PZYh'.T
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堆排序： >F1G!#$0
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package org.rut.util.algorithm.support; Nln`fE/Ht
5W/{h q8}}
import org.rut.util.algorithm.SortUtil; -LtK8wl^
m9in1RI%
/** <5S@ORN
* @author treeroot k<a;[_S
* @since 2006-2-2 .evbE O5
* @version 1.0 3jjMY
*/ r-}-C!
public class HeapSort implements SortUtil.Sort{ 0}{'C5
7 8Vcu'j&_
/* (non-Javadoc) hi ~}
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) o*">KqU`b
*/ Dj i^+;"&
public void sort(int[] data) { DAfyK?+UL
MaxHeap h=new MaxHeap(); f`jc#f5+'
h.init(data); 8WL8/
for(int i=0;i h.remove(); +#2)kg 9_
System.arraycopy(h.queue,1,data,0,data.length); ~ 3^='o
} ]hA,LY f
LxLy+yC#p
private static class MaxHeap{ !\FkG8
+oI3I~
void init(int[] data){ F]UQuOR)
this.queue=new int[data.length+1]; ';0 qj$#
for(int i=0;i queue[++size]=data; glj7$
fixUp(size); O*[{z)M.
} _]b3,%2
} ]mQw,S)/"
sIy
private int size=0; }Ov ^GYnn
>-.e AvD
private int[] queue; !v|FT. T`
O~!T3APGU
public int get() { X&M4MuL
return queue[1]; {Z> M
} |Os6V<u"
!d,8kG
public void remove() { Qck|#tc
SortUtil.swap(queue,1,size--); u7fK1 ^O
fixDown(1); S${Zzt"
} V8WFQdXc
file://fixdown uI~s8{0T6
private void fixDown(int k) { )[L^Dmd,
int j; 0fm*`4Q
while ((j = k << 1) <= size) { gn8|/ev
if (j < size %26amp;%26amp; queue[j] j++; hoM|P8 }rh
if (queue[k]>queue[j]) file://不用交换 :Zt2'vcGpf
break; &;E5[jO^D
SortUtil.swap(queue,j,k); >5hhd38
k = j; .1yT*+`
} 7I=C+
} J@_ctGv
private void fixUp(int k) { ?m7:if+y
while (k > 1) { ujFzJdp3k
int j = k >> 1; s&a1y~rv
if (queue[j]>queue[k]) Aw5pd7qKL
break; a(IY\q[Wh
SortUtil.swap(queue,j,k); b| M3`
k = j; J-xS:Ha'l
} yF13Of^l./
} tz^/J=)"
uR;gVO+QC
} UlcH%pxTt1
GsQ*4=C
} HOoPrB m
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SortUtil： OFk8>"|
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package org.rut.util.algorithm; 5%zXAQD=<
dY7'OAUyVl
import org.rut.util.algorithm.support.BubbleSort; )+P]Vf\jH
import org.rut.util.algorithm.support.HeapSort; urBc=3Rz
import org.rut.util.algorithm.support.ImprovedMergeSort; vb Y3;+M>
import org.rut.util.algorithm.support.ImprovedQuickSort; 6e,xDr
import org.rut.util.algorithm.support.InsertSort; .IarkeCtb
import org.rut.util.algorithm.support.MergeSort; 7O5`v(<9n>
import org.rut.util.algorithm.support.QuickSort; 5U`ZbG
import org.rut.util.algorithm.support.SelectionSort; /./"x~@
import org.rut.util.algorithm.support.ShellSort; [AU II*:}
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/** i;/xK=L
* @author treeroot >Dw~POMy
* @since 2006-2-2 ^3VR-u<O
* @version 1.0 wh6yPVVF/
*/ Q=mI9
public class SortUtil { _"@CGXu
public final static int INSERT = 1; `x8J
public final static int BUBBLE = 2; xu5ia|gYz7
public final static int SELECTION = 3; NLS"eDm
public final static int SHELL = 4; k%s_0 @
public final static int QUICK = 5; <BFQ:
public final static int IMPROVED_QUICK = 6; M`YWn ;
public final static int MERGE = 7; >Fio;cn?
public final static int IMPROVED_MERGE = 8; Tm}rH]F&
public final static int HEAP = 9; XfPFo6
7?j;7.i s(
public static void sort(int[] data) { IU FH:w]
sort(data, IMPROVED_QUICK); M<O{O}t<
} Vd^g9
private static String[] name={ +4;uF]T
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 5|3e&
}; M_v?9L
j9Ybx#
private static Sort[] impl=new Sort[]{ ^G&3sF}
new InsertSort(), ^d}gpin
new BubbleSort(), &LO"g0w
new SelectionSort(), aj8A8ma*}
new ShellSort(), +T/FeVQ
new QuickSort(), q<y#pL=k"*
new ImprovedQuickSort(), "Z Htr<+
new MergeSort(), :y*NM,s
new ImprovedMergeSort(), m>USD?i
new HeapSort() >~%e$a7}+
}; +#U|skl
&Z(K6U#.
public static String toString(int algorithm){ **9x?s
return name[algorithm-1]; n0Y+b[+wj
} _Zk{!
,B?~-2cCz
public static void sort(int[] data, int algorithm) { OsBo+fwT
impl[algorithm-1].sort(data); vgY3L
} Z;9>S=w!
H]Hv;fcC
public static interface Sort { vEf4HZ&w
public void sort(int[] data); \(226^|j
} mxor1P#|
x{D yTtX<
public static void swap(int[] data, int i, int j) { QaUm1i#
int temp = data; +uay(3m((
data = data[j]; bvfk
data[j] = temp; u\&b4=nL
} U*90m~)
} ]7-&V-Ct*