[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; jA^Dk$
} !dh:jPpKq
int i1=l; ^P]5@dv
int i2=mid+1; l`:u5\ rM
for(int cur=l;cur<=r;cur++){ g&EK^q
if(i1==mid+1) }m5()@Q}a
data[cur]=temp[i2++]; cTRtMk%^
else if(i2>r) "zQ<)Q]U
data[cur]=temp[i1++]; EfpMzD7/(
else if(temp[i1] data[cur]=temp[i1++]; BtKor6ba
else wqV"fZA\]
data[cur]=temp[i2++]; iD])E/
} ;~d$OM
} H8dS]N~[Y
9^?muP<A
} CQa8I2VF (
&HAu;u@
改进后的归并排序: ^EkxZ4*g
Q^3{L\6_
package org.rut.util.algorithm.support; [uHC AP
&=n/h5e0t&
import org.rut.util.algorithm.SortUtil; =>evkaj
wQd8/&mmk
/** }BL7P-km
* @author treeroot w{2CV\^>5
* @since 2006-2-2 33D2^Sf6"
* @version 1.0 $0un`&W
*/ &k)v/
public class ImprovedMergeSort implements SortUtil.Sort { BKb#\(95*
[{GN#W|AGP
private static final int THRESHOLD = 10; p[].4_B;
zF>;7'\x
/* =jS$piw.
* (non-Javadoc) AJ&j|/
* t0@AfO.'1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) p8)R#QWz9
*/ 2fu<s^9dh
public void sort(int[] data) { )1Y?S;
int[] temp=new int[data.length]; P2aFn=f
mergeSort(data,temp,0,data.length-1); uPr!;'J=
} E"S#d&9
u7RlxA:
private void mergeSort(int[] data, int[] temp, int l, int r) { $cJ fdE
int i, j, k; _(8#
int mid = (l + r) / 2; Cojs;`3iF:
if (l == r) ]adgOlM
return; Do\j_
if ((mid - l) >= THRESHOLD) '7oCWHq[
mergeSort(data, temp, l, mid); A/UOcl+N
else _6r[msH"
insertSort(data, l, mid - l + 1); ~xsJML
if ((r - mid) > THRESHOLD) %Y=r5'6l
mergeSort(data, temp, mid + 1, r); 6m(? (6+;K
else 4uMMf
insertSort(data, mid + 1, r - mid); K\fD';
+75"Q:I
for (i = l; i <= mid; i++) { ^0}wmxDq
temp = data; 6S3D#SY
} m;{HlDez
for (j = 1; j <= r - mid; j++) { Tsb}\
temp[r - j + 1] = data[j + mid]; S(xs;tZ
} sZr \mQ~
int a = temp[l]; lZ[J1:%
int b = temp[r]; U/s Z1u-
for (i = l, j = r, k = l; k <= r; k++) { Db*b"/]
if (a < b) { oA~0"}eS
data[k] = temp[i++]; 6Y,&q|K
a = temp; {^N,$,Ab.
} else { '/ Hoq
data[k] = temp[j--]; *C+[I
b = temp[j]; a.gMH uL
} RHNAHw9
} Ij.mLO]
} LA59O@r
"j?xgV
/** p"~@q}3
* @param data id : ^|
* @param l $V?sD{=W
* @param i _xi&%F/
*/ 7_qsVhh]$E
private void insertSort(int[] data, int start, int len) { =EA @
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); rKslgZhQ
} M!!vr8}
} \I4Uj.'>\
} `RE>gX
} GeB&S!F
_eBNbO_J
堆排序： *?uUP
tB`"gC~
package org.rut.util.algorithm.support; DO*6gzW
!.O[@A\.-
import org.rut.util.algorithm.SortUtil; N2[jBy8M
PyHL`PZZ
/** <kwF<J
* @author treeroot \eQPvkx2
* @since 2006-2-2 A=|a!N/
* @version 1.0 $t"QLsk0
*/ tS3&&t
public class HeapSort implements SortUtil.Sort{ fB]2"(
S["r @<
/* (non-Javadoc) Y`-q[F?\y
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) e<`?$tZ3
*/ !J<0.nO/:
public void sort(int[] data) { !XI9evJw
MaxHeap h=new MaxHeap(); UCj+V@{
h.init(data); u R5h0Fi
for(int i=0;i h.remove(); 4,X CbcC
System.arraycopy(h.queue,1,data,0,data.length); }.9a!/@Aj
} G^K;+&T
P2s\f;Dwr
private static class MaxHeap{ &K[~Ab_
$/#[,1
void init(int[] data){ BU>R<A5h
this.queue=new int[data.length+1]; |G6'GTwZD
for(int i=0;i queue[++size]=data; c>/7E-T
fixUp(size); Y|hd!C-x
} -:45Q{u/
} ?^7X2 u$nm
w7pX]<?R"
private int size=0; AFYdBK]
X#ha*u~U
private int[] queue; R!X+-
wnXU=
public int get() { ttlMZLX{TJ
return queue[1]; FrLv%tK|
} OQ<;w
j8^#698X
public void remove() { /#eS3`48
SortUtil.swap(queue,1,size--); lm&^`Bn)
fixDown(1); z}$.A9yn
} 4JO16
file://fixdown upeioC q
private void fixDown(int k) { BAi0w{
int j; c3PA<q[
while ((j = k << 1) <= size) { L|-|DOgw
if (j < size %26amp;%26amp; queue[j] j++; ? }`mQ<~
if (queue[k]>queue[j]) file://不用交换 ]EDCs?,
break; b~YIaD[Z
SortUtil.swap(queue,j,k); 368 g>/#'
k = j; w&VDe(:~
} &l_}yf"v
} pSYEC,0B
private void fixUp(int k) { r5(efTgAd+
while (k > 1) { ?`kZ6$
int j = k >> 1; Q:y'G9b
if (queue[j]>queue[k]) j:2F97
break; _E6N*ORV
SortUtil.swap(queue,j,k); ]8Xip/uE
k = j; }mUb1b
} (q}LirR
} wPcEvGBN=
`@0AGSzUv
} 3%Q9521
u'DpZ
} "i*gJFW|
#!#s7^%K&
SortUtil： ZYt<O
%yl17:h#
package org.rut.util.algorithm; JZ:yPvJ
e VQ-?DK
import org.rut.util.algorithm.support.BubbleSort; j}(m$j'
import org.rut.util.algorithm.support.HeapSort; qss)5a/x.
import org.rut.util.algorithm.support.ImprovedMergeSort; |~18MW
import org.rut.util.algorithm.support.ImprovedQuickSort; )24M?R@r
import org.rut.util.algorithm.support.InsertSort; P6'Se'f8
import org.rut.util.algorithm.support.MergeSort; i*!2n1c[
import org.rut.util.algorithm.support.QuickSort; iY&I?o!Ch
import org.rut.util.algorithm.support.SelectionSort; "{t]~urLd
import org.rut.util.algorithm.support.ShellSort; ?Drq!?3PDc
v#X#F9C
/** A%^7D.j
* @author treeroot |z:4T%ES
* @since 2006-2-2 difX7)\
* @version 1.0 _G25$%/LU
*/ a1_o
public class SortUtil { ]bpgsW:Xu
public final static int INSERT = 1; S)4p'cUwq
public final static int BUBBLE = 2; hv\Dz*XTs0
public final static int SELECTION = 3; E\;%,19Ob
public final static int SHELL = 4; 3hUP>F8
public final static int QUICK = 5; FC+h \
public final static int IMPROVED_QUICK = 6; lNWP9?X
public final static int MERGE = 7; ~#}T|
public final static int IMPROVED_MERGE = 8; wp> z04
public final static int HEAP = 9; v+SdjFAY
UEfY'%x
public static void sort(int[] data) { v7`{6Pf_$
sort(data, IMPROVED_QUICK); B<,7!:.II
} lmL$0{Yr
private static String[] name={ qc\D=3#Yp
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Qh-:P`CN
}; Zzz94`
257$ !
private static Sort[] impl=new Sort[]{ (+/d*4
new InsertSort(), ylQj2B,CB
new BubbleSort(), 10OkrNQ
new SelectionSort(), _:p-\Oo.
new ShellSort(), PiCGZybCA
new QuickSort(), ;DR5?N/a
new ImprovedQuickSort(), &/"a E
new MergeSort(), K:~tZ
new ImprovedMergeSort(), ftl?x'P%
new HeapSort() a'dlAda
}; Ot:}Ncq^\O
VO=Ibu&X
public static String toString(int algorithm){ =+ >>l0=_v
return name[algorithm-1]; [)~1Lu
} ,-8-Y>[
&vn2u bauS
public static void sort(int[] data, int algorithm) { e6J^J&`|4
impl[algorithm-1].sort(data); Gsb^gd
} ^+CHp(X
E]GbLU;TH
public static interface Sort { [0]A-#J
public void sort(int[] data); cBZEyy&
} : MjDcI~
%DXBl:!Y`
public static void swap(int[] data, int i, int j) { LCtVM70
int temp = data; m|c[C\)By
data = data[j]; HG?+b
data[j] = temp; [3nWxFz$R
} qIsf!1I?
} Z${eDl6i