[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; 0_ ;-QAd
} |{$Vk%cUE
int i1=l; H.YntFtD'
int i2=mid+1; #e=[W))
for(int cur=l;cur<=r;cur++){ p}h)WjC
if(i1==mid+1) 9Gy1T3y5"
data[cur]=temp[i2++]; 7,:QFV
else if(i2>r) zfS`@{;F`|
data[cur]=temp[i1++]; *@D.=i>
else if(temp[i1] data[cur]=temp[i1++]; ,i'>+Ix<
else ?O28Q DUI
data[cur]=temp[i2++]; |d{4_o90
} FvRog<3X
} (u~@@d"
Cjw|.c`
} N^O.P
NL1Ajms`
改进后的归并排序: &n['#7 <(!
WXJ%bH
package org.rut.util.algorithm.support; q$\KE4v"
7r:!HmRl
import org.rut.util.algorithm.SortUtil; ?(E$|A
/:B!hvpw
/** 5Ba eHzI
* @author treeroot SlmgFk!r!
* @since 2006-2-2 q>,i `*
* @version 1.0 1B2>8N
*/ C}7Sh6
public class ImprovedMergeSort implements SortUtil.Sort { JVN0];IL}
7%C6gU!r
private static final int THRESHOLD = 10; 6L8wsz CW
SI-s:%O
/* M-eX>}CDm
* (non-Javadoc) ?xIwQd0
* `Os@/S
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "I u3&mc
*/ V4_ZBeWA
public void sort(int[] data) { &kh-2#E
int[] temp=new int[data.length]; <"6}C)G
mergeSort(data,temp,0,data.length-1); caS5>wk`R
} p?ICZg:
BjSLbw-C
private void mergeSort(int[] data, int[] temp, int l, int r) { Zhf+u r
int i, j, k; PyK)ks!6
int mid = (l + r) / 2; >Ka}v:E
if (l == r) \:8 >@Q
return; m#ID%[hg$
if ((mid - l) >= THRESHOLD) u`g|u:(r
mergeSort(data, temp, l, mid); A3MVNz$wo"
else 2>p>AvcK
insertSort(data, l, mid - l + 1); JT!-Q!O}O
if ((r - mid) > THRESHOLD) !ouJ3Jn
mergeSort(data, temp, mid + 1, r); Z!DGCw
else Ubv<3syR'
insertSort(data, mid + 1, r - mid); |pA3ZWm
z]K:Amp;Z
for (i = l; i <= mid; i++) { |BN^5mqP6
temp = data; p4[cPt~C
} F8KSB"!NR
for (j = 1; j <= r - mid; j++) { 2{(_{9<>z
temp[r - j + 1] = data[j + mid]; ]U82A**n
} wMr*D['" #
int a = temp[l]; 4+Wti!s
int b = temp[r]; -uX): h!
for (i = l, j = r, k = l; k <= r; k++) { }Dp/K4
if (a < b) { |<gYzbq
data[k] = temp[i++]; V_^p?Fi#
a = temp; M] 7#
} else { /GRkQ",
data[k] = temp[j--]; WTbq)D(&[_
b = temp[j]; T'!7jgk{:
} az/NZlJhT
} t[VA|1gG
} 22$M6Qof]n
"&W80,O3
/** z&Cz!HrS
* @param data kIrb;bZ+l
* @param l ].w~FUa
* @param i },+ &y^
*/ bL-+
private void insertSort(int[] data, int start, int len) { dD ?ZF6
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); NSI$uS6
} H[S[ y
} HHzAmHt
} Yv>kToa\^
} OO#_0qK
y\k#83aU|
堆排序： 7Ji|x{``
\SKobO?qI
package org.rut.util.algorithm.support; @L0xU??"|
ZOw%Fw4B
import org.rut.util.algorithm.SortUtil; u0p[ltJ,
Ce_k&[AJF
/** _Oc5g5_{
* @author treeroot -?nr q <3
* @since 2006-2-2 VUmf;~
* @version 1.0 cao=O \Y7
*/ %?2y2O,;
public class HeapSort implements SortUtil.Sort{ lu vrvm
l$/.B=]
/* (non-Javadoc) F#=M$j_
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) zl $mt'\y
*/ }JI@f14
public void sort(int[] data) { [0MNq]gxf
MaxHeap h=new MaxHeap(); ?sD4S
h.init(data); XtCG.3(LY
for(int i=0;i h.remove(); _xY dnTEl
System.arraycopy(h.queue,1,data,0,data.length); Vq$8!#~w
} mSeCXCrZlI
l]R=I2t
private static class MaxHeap{ +adwEYRrr
FNlS)Bs
void init(int[] data){ '-X[T}
this.queue=new int[data.length+1]; Q-<h)WTA
for(int i=0;i queue[++size]=data; 6pP:Q_U$
fixUp(size); p?-qlPl
} vj%3v4
} 6({TG&`!]
i/|}#yw8A
private int size=0; !{q_Q !
z_f^L %J0
private int[] queue; D||)H
FdGnNDl*e
public int get() { ?mwa6]
return queue[1]; Y#[xX2z9
} D,\hRQ
cXw8#M!
public void remove() { Lo,uH`qU
SortUtil.swap(queue,1,size--); {^":^N)
fixDown(1); {'cm;V+
} >)^Q p-
file://fixdown cS#yfN,
private void fixDown(int k) { T{:8,CiW
int j; U'@#n2p:k
while ((j = k << 1) <= size) { #?"^:,Y
if (j < size %26amp;%26amp; queue[j] j++; OMfw#
if (queue[k]>queue[j]) file://不用交换 ,J(shc_F
break; Y6G`p
SortUtil.swap(queue,j,k); PCx:
k = j; HjCe/J ;
} eHb@qKnf
} 2Q=I`H_
private void fixUp(int k) { `l2h65\
while (k > 1) { dk/f_m
int j = k >> 1; F1*xY%Jv^M
if (queue[j]>queue[k]) |_njN
break; S ^]mF>xX8
SortUtil.swap(queue,j,k); 1 HY K& ',
k = j; 9+#BU$*v
} :Z%-&)F
} =&Z#QD"vl
H S)$|m_
} +wp!hk&C5
@d|3c7` A
} 2Q%*` vCuV
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SortUtil： I= 2jQ>$Q
J4%"38l
package org.rut.util.algorithm; jP#I](\eG
1>=%TIO)
import org.rut.util.algorithm.support.BubbleSort; m*|G2
import org.rut.util.algorithm.support.HeapSort; @4G{L8Q}
import org.rut.util.algorithm.support.ImprovedMergeSort; .cm9&&"Z
import org.rut.util.algorithm.support.ImprovedQuickSort; o-<XR9,N*
import org.rut.util.algorithm.support.InsertSort; &$bcB]C\3
import org.rut.util.algorithm.support.MergeSort; '>cZ7:
import org.rut.util.algorithm.support.QuickSort; O1Ynl`}
import org.rut.util.algorithm.support.SelectionSort; }Gva=N:
import org.rut.util.algorithm.support.ShellSort; +#L'gc
\ [bJ@f*."
/** mWF\h>]|.
* @author treeroot {8 #
* @since 2006-2-2 ~p?D[]h
* @version 1.0 ^EJ]LNk}
*/ vddl9"V)
public class SortUtil { C<#_1@^:8e
public final static int INSERT = 1; 4k!>JQor
public final static int BUBBLE = 2; |?v .5|1
public final static int SELECTION = 3; &D91bT+L
public final static int SHELL = 4; y[ZVi5) ,
public final static int QUICK = 5; ,zEPdhTX
public final static int IMPROVED_QUICK = 6; T_[5 ZYy
public final static int MERGE = 7; [Lcy &+
public final static int IMPROVED_MERGE = 8; dDA,Ps
public final static int HEAP = 9; ]?T,J+S
YpgO]\/w
public static void sort(int[] data) { E~c>j<'-"<
sort(data, IMPROVED_QUICK); WMS~Bk+!
} 8=)9ZjfD
private static String[] name={ _\<TjGtG
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" =om<*\vsO
}; +&r=XJ5:`p
LJA uTg
private static Sort[] impl=new Sort[]{ 9"?;H%.
new InsertSort(), $F1Am%
new BubbleSort(), +7{8T{
new SelectionSort(), oT|:gih5
new ShellSort(), hcpe~spz9|
new QuickSort(), .pG`/[*a
new ImprovedQuickSort(), 558!?kx$
new MergeSort(), sf O{.#5<
new ImprovedMergeSort(), `YY07(%
new HeapSort() FE1'MUT_
}; Y.q$"lm7k
cqaq~
public static String toString(int algorithm){ *^KEb")$
return name[algorithm-1]; <sn,X0W
} PZY6 I
X/buz
public static void sort(int[] data, int algorithm) { r?9".H
impl[algorithm-1].sort(data); 3e>U(ES
} e~SRGyIww
+i[@+`
public static interface Sort { v|dt[>G
public void sort(int[] data); b'I@TLE')
} 3lbGG42:
WD5jO9Oai
public static void swap(int[] data, int i, int j) { :)y3&I
int temp = data; b\t?5z-Z
data = data[j]; _$/Bt?h
data[j] = temp; ^x Z=";eq
} Uu|2!}^T
} 4b+_|kYb