[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; 1zGhX]z
} @!KG;d:l
int i1=l; shuoEeoo
int i2=mid+1; )u>/:
for(int cur=l;cur<=r;cur++){ "NvB@>S
if(i1==mid+1) <!a%GI
data[cur]=temp[i2++]; i~ITRi@
else if(i2>r) EHH+)mlo
data[cur]=temp[i1++]; t2hI^J0y
else if(temp[i1] data[cur]=temp[i1++]; r}M2t$nv
else 5c 69M5
data[cur]=temp[i2++]; uGY(`
} ,tl(\4n
} Cm%xI&Y
Lt2<3DB
} tk66Ggi[K
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改进后的归并排序: a"!r]=r
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package org.rut.util.algorithm.support; a~wlD.P
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import org.rut.util.algorithm.SortUtil; ,r,$x4*
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/** k.?@qCs[
* @author treeroot fK10{>E1
* @since 2006-2-2 EncJB
* @version 1.0 KvNw'3Ua
*/ q 1~3T;Il
public class ImprovedMergeSort implements SortUtil.Sort { m/p:W/0L
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private static final int THRESHOLD = 10; c3!YA"5
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/* ^ Q
* (non-Javadoc) +qee8QH
* {33B%5n"
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5uO.@0
*/ fa2hQJ02
public void sort(int[] data) { ;hCUy=m.
int[] temp=new int[data.length]; !"bU|a
mergeSort(data,temp,0,data.length-1); d#u*NwY}
} [_1K1i"m
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private void mergeSort(int[] data, int[] temp, int l, int r) { 0xzS9
int i, j, k; }HxC~J"
int mid = (l + r) / 2; C~c|};&%
if (l == r) W+ v#m>G
return; Xr]<v%,C
if ((mid - l) >= THRESHOLD) {LqahO*
mergeSort(data, temp, l, mid); .Gn-`
else &e;GoJ
insertSort(data, l, mid - l + 1); ^wMZG'/
if ((r - mid) > THRESHOLD) )5Ofr-Y
mergeSort(data, temp, mid + 1, r); ?7\$zn)v#
else 2A(IsUtqO:
insertSort(data, mid + 1, r - mid); k@9CDwh*s
KpfQ=~'
for (i = l; i <= mid; i++) { s E0ldN"
temp = data; jI45X22j
} `+5,=S
for (j = 1; j <= r - mid; j++) { >m4HCs>
temp[r - j + 1] = data[j + mid]; a"whg~
} r9whW;"q
int a = temp[l]; (i>bGmiN
int b = temp[r]; y aLc~K
for (i = l, j = r, k = l; k <= r; k++) { #GIjU1-
if (a < b) { QRlrcauM
data[k] = temp[i++]; *7^w}v+.
a = temp; z0xw0M+X
} else { ?vV&tqnx%
data[k] = temp[j--]; 6 u}c543
b = temp[j]; ]=jpqxlx
} 1Gh3o}z
} 2F|06E'
} "cx#6Bo|
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/** on)$y&lu
* @param data ER)to<k
* @param l F.@U X{J
* @param i _>(qQ-Px
*/ &ngG_y8}&
private void insertSort(int[] data, int start, int len) { Rd>PE=u
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); :y3e-lr
} A&7~]BR\
} qZ rv2dT
} OQ*rxLcA
} Uq:CM6q\
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堆排序： :2E?|}`7\
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package org.rut.util.algorithm.support; G ,?l o=m
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import org.rut.util.algorithm.SortUtil; (sL!nRw
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/** [@`Ki
* @author treeroot {B)-+0 6
* @since 2006-2-2 M\)(_I)V=
* @version 1.0 f1TYQ?e
*/ MfK}DEJK,
public class HeapSort implements SortUtil.Sort{ (#5TM1/A
H3Sfz'
/* (non-Javadoc) ]n (:X
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) t7qzAr
*/ xI,7ld~
public void sort(int[] data) { 6[SE*/E@L
MaxHeap h=new MaxHeap(); V;%DS)-
h.init(data); $C`YVv%?0
for(int i=0;i h.remove(); Lk:Sju
System.arraycopy(h.queue,1,data,0,data.length); k!= jO#)Rd
} mYw9lM
Z!SFJ{
private static class MaxHeap{ 4I7;/ZgALQ
x&YcF78
void init(int[] data){ Mi2lBEu,
this.queue=new int[data.length+1]; k(%h{0'
for(int i=0;i queue[++size]=data; PR;A 0
fixUp(size); M?m)<vMr*
} 3Q_L6Wj~
} 2:tO"
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private int size=0; o%V%@q H
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private int[] queue; \o=YsJ8U
jO+#$=C
public int get() { gaa;PX
return queue[1]; aFtL_# U
} XX;MoE~MM
PAHkF&
public void remove() { hB 36o9|9
SortUtil.swap(queue,1,size--); j%@wQVxq
fixDown(1); RY9h^q*
} c</u]TD
file://fixdown G@I/Dy
private void fixDown(int k) { 1@p'><\
int j; mb_~ "}A
while ((j = k << 1) <= size) { BkcA_a:W
if (j < size %26amp;%26amp; queue[j] j++; W^Z#_{
if (queue[k]>queue[j]) file://不用交换 kjOPsz*0
break; 3IHA+Zz
SortUtil.swap(queue,j,k); |\iJ6m;a
k = j; :3$-Qv X
} D8,V'n>L
} IolKe:'>@
private void fixUp(int k) { [Adkj
while (k > 1) { ,a1 1&"xl
int j = k >> 1; `-QY<STTP9
if (queue[j]>queue[k]) 3D*vNVI
break; g?=|kp
SortUtil.swap(queue,j,k); qsTB)RdjP%
k = j; AKkr )VgY
} #V:28[
} F3 z:|sTqc
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} ^ua8Ya
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} =p29}^@@t
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SortUtil： <sNkyQ
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package org.rut.util.algorithm; iD-,C`
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import org.rut.util.algorithm.support.BubbleSort; ^geC?m
import org.rut.util.algorithm.support.HeapSort; ?!d\c(5Gt
import org.rut.util.algorithm.support.ImprovedMergeSort; xHo iu$i6
import org.rut.util.algorithm.support.ImprovedQuickSort; N5Rda2m
import org.rut.util.algorithm.support.InsertSort; pk5W!K
import org.rut.util.algorithm.support.MergeSort; '"QN{ja
import org.rut.util.algorithm.support.QuickSort; &9:"X
import org.rut.util.algorithm.support.SelectionSort; NL76 jF
import org.rut.util.algorithm.support.ShellSort; JZM:R
{:m%n-
/** cm!|A)~
* @author treeroot f+o%N
* @since 2006-2-2 2&Hn%q)
* @version 1.0 knU=#
*/ X'W8 mqk
public class SortUtil { \gE6KE<?p
public final static int INSERT = 1; f#3U,n8:
public final static int BUBBLE = 2; 8p)*;Y
public final static int SELECTION = 3; !J@!P?0. C
public final static int SHELL = 4; )QO"1#zg@c
public final static int QUICK = 5; (g>>
public final static int IMPROVED_QUICK = 6; `NNr]__
public final static int MERGE = 7; FBCi,_ \4
public final static int IMPROVED_MERGE = 8; 4?s ~S. %
public final static int HEAP = 9; d l<7jM?
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public static void sort(int[] data) { b9(_bsc
sort(data, IMPROVED_QUICK); N-g=_86C"
} !gm;g}]szG
private static String[] name={ %1Pn;bUU!
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" V7\@g
}; E"|LA[o
;jEDGKLq
private static Sort[] impl=new Sort[]{ ^3B&E^R
new InsertSort(), #'<s/7;~
new BubbleSort(), wgeR%#DW
new SelectionSort(), r?l7_aBv3
new ShellSort(), &1:_+
new QuickSort(), (6*CORE
new ImprovedQuickSort(), et$VR:
new MergeSort(), Q{~WWv
new ImprovedMergeSort(), v[O}~E7'
new HeapSort() 9 Z5!3
}; PqOPRf
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public static String toString(int algorithm){ e/p2| 4;
return name[algorithm-1]; os3jpFeG'
} BcfW94
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public static void sort(int[] data, int algorithm) { /7)l22<
impl[algorithm-1].sort(data); 88GS Bg:YH
} ZB5:FtW4
C" W,
public static interface Sort { D[NJ{E.{
public void sort(int[] data); nSM8o<)H
} []vt\I ;
XmK2Xi;=b
public static void swap(int[] data, int i, int j) { %)|pUa&
int temp = data; i`Tp +e@a>
data = data[j]; 41S.&-u
data[j] = temp; BXCB/:0
} !\DlX|
} sr=~Uq{g