[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; ::Zo` vP
} /WQ.,a
int i1=l; "#C2+SKM1
int i2=mid+1; ztVTXI%Kz
for(int cur=l;cur<=r;cur++){ 5=o^/Vkc
if(i1==mid+1) 2@S}x@^
data[cur]=temp[i2++]; TPp]UG
else if(i2>r) M+ [ho]
data[cur]=temp[i1++]; ~kW?]/$h
else if(temp[i1] data[cur]=temp[i1++]; eB0exPz%
else <8WFaP3,
data[cur]=temp[i2++]; (3n "a'
} )n&hO_c/
} 56AC%_ g>
oc1BOW z
} ?L<B]!9HZt
~& -h5=3
改进后的归并排序: tpWGmjfo>
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package org.rut.util.algorithm.support; 3=enk0$
;!<}oZp{
import org.rut.util.algorithm.SortUtil; /+*"*Br/
bZ*=fdh
/** u99a"+
* @author treeroot TOwqr T/
* @since 2006-2-2 w)dnmrKDZg
* @version 1.0 uj.i(Us
*/ P%|~Ni_BTX
public class ImprovedMergeSort implements SortUtil.Sort { /A{ Zf'DI
]N'3jf`W
private static final int THRESHOLD = 10; UhH#>2r_
hYoUZ'4
/* jOGdq;|
* (non-Javadoc) kmC@\xTp
* --$* q"
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %bnXZA2Sx
*/ svpQ.Q
public void sort(int[] data) { H<d~AurX)J
int[] temp=new int[data.length]; m?w_ ]
mergeSort(data,temp,0,data.length-1); m. pm,
} P&0eu
6b|<$Je9
private void mergeSort(int[] data, int[] temp, int l, int r) { 5Zq hyv=
int i, j, k; l<6GZ
int mid = (l + r) / 2; 6ll!7U(9(
if (l == r) 8}|et~7!
return; f~VlCdf+
if ((mid - l) >= THRESHOLD) -8l<5g7
mergeSort(data, temp, l, mid); Qx)b4~F?
else *(9Tl]w
insertSort(data, l, mid - l + 1); GLsa]}m,9
if ((r - mid) > THRESHOLD) 3E*|^*
mergeSort(data, temp, mid + 1, r); (=j;rfvP
else b~aM=71
insertSort(data, mid + 1, r - mid); ](Fey0@
/DAR'9@h
for (i = l; i <= mid; i++) { ,@ '^3u
temp = data; qb? <u
} ! I:N<
for (j = 1; j <= r - mid; j++) { jR%*,IeB
temp[r - j + 1] = data[j + mid]; ZJ3g,dc
} -#ZvjEaey
int a = temp[l]; PYCN3s#Gi
int b = temp[r]; sh :$J[
for (i = l, j = r, k = l; k <= r; k++) { M=iTwK
if (a < b) { ?tLApy^`?
data[k] = temp[i++]; c_>Gl8J
a = temp; U}w'/:H
} else { .\ Ijq!
data[k] = temp[j--]; =UKxf
b = temp[j]; _[HZ[9c!
} L-|l$Ti"
} G^.N$wcv
} IR-n:z
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/** l5D)UO
* @param data 5f*_K6,v
* @param l D40 vCax^J
* @param i 4p"'ox#
*/ Bve|+c6W
private void insertSort(int[] data, int start, int len) { iVFOOsJ@
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Cx TAd[az
} R,3cJ Y_%
} 1GYZ1iA
} Yc7YNC.
} fl-J:`zyyZ
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堆排序： HPphTu}`
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package org.rut.util.algorithm.support; O=jLZ2os
zM0}(5$m
import org.rut.util.algorithm.SortUtil; sT?{
e"hfeNphz
/** <{#_;7h"
* @author treeroot QP\9#D~
* @since 2006-2-2 gWr7^u&q@|
* @version 1.0 'WW:'[Syn'
*/ @} Ig*@
public class HeapSort implements SortUtil.Sort{ cQEUHhRg!
FI^Wh7J
/* (non-Javadoc) FOF@@C~aH
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }y6|H,t9
*/ Y D<3#Dr]
public void sort(int[] data) { M/ 64`lcb
MaxHeap h=new MaxHeap(); j!4{+&Laq
h.init(data); X /c8XLe"
for(int i=0;i h.remove(); JVoC2Z<
System.arraycopy(h.queue,1,data,0,data.length); ^5X?WA,Z99
} X$!fR >Zc
x17:~[c']
private static class MaxHeap{ HTL6;87w+]
':n`0+Eh
void init(int[] data){ i)x0]XF
this.queue=new int[data.length+1]; ov+{<0Q
for(int i=0;i queue[++size]=data; Wep^He\:
fixUp(size); |u>V> PN
} v.]{b8RR
} $5XAS
]W3_]N 3
private int size=0; *q6XK_
X7$]qE K
private int[] queue; t=Oq<r
PaKa bPY
public int get() { i%o%bib#
return queue[1]; vbmt0df
} p4P=T@:
X,49(-~\
public void remove() { 5|rBb[
SortUtil.swap(queue,1,size--); n.@HT"
fixDown(1); |[rn/
} _%CM<z e
file://fixdown HR-'8?)R.A
private void fixDown(int k) { ?;l@yx
int j; A}lxJ5h0
while ((j = k << 1) <= size) { %mQ&pk
if (j < size %26amp;%26amp; queue[j] j++; as@8L|i*
if (queue[k]>queue[j]) file://不用交换 )+L|<6JXA
break; Gsh9D
SortUtil.swap(queue,j,k); tl_3 %$s
k = j; %6q82}#`
} ]fajj\
} Ts.2\-+3
private void fixUp(int k) { q|ce7HnK
while (k > 1) { Sn[xI9}O
int j = k >> 1; 6) i-S<(
if (queue[j]>queue[k]) Ovx *
break; 4ior
SortUtil.swap(queue,j,k); qU#A,%kcV
k = j; $6n J+
} &MH8~LSb
} 2B4.o*Q\
OP\jO DX
} {|oWU8.l
ug,AvHEnB
} bo#xqSGQ
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SortUtil： ?q`i MiN
a6gw6jQ
package org.rut.util.algorithm; N5K(yY_T
-L/%2 X
import org.rut.util.algorithm.support.BubbleSort; N)mZ!K44
import org.rut.util.algorithm.support.HeapSort; ?pIELezfK
import org.rut.util.algorithm.support.ImprovedMergeSort; -Y524
import org.rut.util.algorithm.support.ImprovedQuickSort; }aOqoi7w
import org.rut.util.algorithm.support.InsertSort; 8Ay7I
import org.rut.util.algorithm.support.MergeSort; \HB fM&
import org.rut.util.algorithm.support.QuickSort; F%V|Aa
import org.rut.util.algorithm.support.SelectionSort; pJFn 8&!J
import org.rut.util.algorithm.support.ShellSort; `!cdxKLR
#;8)UNc)}
/** _jX,1+M
* @author treeroot `LoRudf_`
* @since 2006-2-2 5=V"tQ&d9U
* @version 1.0 J%"5?)[z
*/ _=0Ja S>M.
public class SortUtil { to: ;:Goa
public final static int INSERT = 1; >\K=)/W2
public final static int BUBBLE = 2; x=H{Rv
public final static int SELECTION = 3; 5:r AWq
public final static int SHELL = 4; /}1|'?P
public final static int QUICK = 5; z9 0JZA
public final static int IMPROVED_QUICK = 6; ovN3.0tAI
public final static int MERGE = 7; HsYzIQLL
public final static int IMPROVED_MERGE = 8; |"K%Tvxe
public final static int HEAP = 9; Do(G;D`h+_
'|gsmO
public static void sort(int[] data) { 7l7VT?<:
sort(data, IMPROVED_QUICK); &/[MWQ
} T"P}`mT
private static String[] name={ ~U w<e~
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" R'Ue>k
}; KAZ<w~55c
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private static Sort[] impl=new Sort[]{ (^W}uDPCB
new InsertSort(), cS Lj\'`b
new BubbleSort(), q5r7KYH{
new SelectionSort(), (ORbhjl
new ShellSort(), EPW4 h/I
new QuickSort(), hRXnig{;3
new ImprovedQuickSort(), @N '_qu
new MergeSort(), Z4G%Ve[
new ImprovedMergeSort(), 1^^{;R7N
new HeapSort() jS]Saqd
}; Xj]9/?B?
\ C:Gx4K
public static String toString(int algorithm){ I+Fy)=DO9
return name[algorithm-1]; p[&Jl
} S8qg"YR
g<;pyvq|:
public static void sort(int[] data, int algorithm) { 0fstEExw
impl[algorithm-1].sort(data); lO\HchGzB
} WCd:(8B
F~=kMQO
public static interface Sort { D)G oWt
public void sort(int[] data); \\EX'L
} 9Avj\G
Z5'^Hj1,
public static void swap(int[] data, int i, int j) { e,#w*|
int temp = data; \ o2oQ3
data = data[j]; KPy)%i
data[j] = temp; (@NILK
} ,>#\aO1n
} rbOJ;CK