[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; 8L1vtYz
} AS5'j
int i1=l; X} {z7[
int i2=mid+1; Z mVw5G q
for(int cur=l;cur<=r;cur++){ ``mnk>/
if(i1==mid+1) /]pJ(FFC
data[cur]=temp[i2++]; hQ7-m.UZw
else if(i2>r) 4*Uzomb?q
data[cur]=temp[i1++]; 4|U$ON?x
else if(temp[i1] data[cur]=temp[i1++]; O"^3,-
else R.x^
data[cur]=temp[i2++]; vG'6?%38
} )+7|_7 !x
} nwS @r
^#( B4l!
} L!;"73,&(8
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改进后的归并排序: 05>mRqVL
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package org.rut.util.algorithm.support; f4 k
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import org.rut.util.algorithm.SortUtil; amTeTo]Tg
ml,FBBGq|-
/** u}r>?/V!
* @author treeroot ]y0bgKTK
* @since 2006-2-2 #)r^ZA&E
* @version 1.0 QHU|aC{r
*/ |VX )S!
public class ImprovedMergeSort implements SortUtil.Sort { u*}ltR~/
atiyQuT6Wh
private static final int THRESHOLD = 10; \qf0=CPw8
kz_gR;"(Z
/* _"%hcCMw
* (non-Javadoc) ThvgYv--B
* _sqj~|K
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0 i'bo*
*/ @vZeye
public void sort(int[] data) { q\pI&B
int[] temp=new int[data.length]; <uYrYqN
mergeSort(data,temp,0,data.length-1); 4%B0H>
} ObPXVqG"?
%g_)_ ~
private void mergeSort(int[] data, int[] temp, int l, int r) { `.z"Q%uz
int i, j, k; \OJam<hZ
int mid = (l + r) / 2; CZ33|w
if (l == r) "hmLe(jo}
return; '@/1e\-y
if ((mid - l) >= THRESHOLD) K<rv|bJ
mergeSort(data, temp, l, mid); ;A6%YY
else $-)T
insertSort(data, l, mid - l + 1); @ D,]v:
if ((r - mid) > THRESHOLD) Q&#Arph0e
mergeSort(data, temp, mid + 1, r); %}IrZrh
else KS'n$
insertSort(data, mid + 1, r - mid); ;FGS(.mjlC
c>Tf@Aog>
for (i = l; i <= mid; i++) { de/oK c
temp = data; DaS~bweMw
} mv,5Q6!
for (j = 1; j <= r - mid; j++) { 29AE B
temp[r - j + 1] = data[j + mid]; C547})
} tzShds
int a = temp[l]; R-Ys<;
int b = temp[r]; Q7.jSL6
for (i = l, j = r, k = l; k <= r; k++) { 2YDD`:R
if (a < b) { }_Ci3|G>%D
data[k] = temp[i++]; a<0q%Ax
a = temp; (|\%)vH-
} else { C$0rl74Wi
data[k] = temp[j--]; 2qdc$I&$
b = temp[j]; 0q28Ulv9
} *sQ.y {
} &MZ{B/;;H
} bf=!\L$
Y\Z6u)
/** U!{~L$S
* @param data kQ]4Bo
* @param l |:.s6a#(
* @param i 6B|OKwL
*/ !gJTKQX4
private void insertSort(int[] data, int start, int len) { K?nQsT;3p
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Q'ZZQ
} znB+RiV8
} ?)ct@,Ek$
} .i {yW
} 2TG2<wqvE
OMW]9E
堆排序： 2$o#b.
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package org.rut.util.algorithm.support; .]H/u "d
%+nM4)h
import org.rut.util.algorithm.SortUtil; M]|]b-#
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/** Ee_?aG e&
* @author treeroot a@Vk(3Rx_
* @since 2006-2-2 vz(=3C[
* @version 1.0 g(auB/0s
*/ 'qUM38s
public class HeapSort implements SortUtil.Sort{ 9M^5<8:
@~Ys*]4UE
/* (non-Javadoc) LF`]=.Q
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) \K9.]PfbI
*/ NT2XG&$W>
public void sort(int[] data) { kh@O_Q`j
MaxHeap h=new MaxHeap(); s2(7z9jR
h.init(data); ALn_ifNh
for(int i=0;i h.remove(); n=)LB& m
System.arraycopy(h.queue,1,data,0,data.length); _M&n~ r
} M@l|n
dDSb1TM
private static class MaxHeap{ k( Ik+=u
h oO847
void init(int[] data){ *o5[P\'6
this.queue=new int[data.length+1]; QW'*^^
for(int i=0;i queue[++size]=data; $}IG+,L
fixUp(size); 2 FoLJ
} _X
} .Tm.M7
\03<dUA6
private int size=0; }Ml BmD
\[qxOZ{
private int[] queue; %y\5L#T!>
uF|Up]Z G
public int get() { AFM+`{Cq
return queue[1]; CzY18-L@EX
} !VaC=I^{
}z#M!~
public void remove() { @-L\c>rqT
SortUtil.swap(queue,1,size--); q sUBvq
fixDown(1); :{^~&jgL
} c#CV5J\Kk3
file://fixdown k]C k%[d
private void fixDown(int k) { KgbBa2@+
int j; R>Dr1fc}
while ((j = k << 1) <= size) { ).`v&-cK4E
if (j < size %26amp;%26amp; queue[j] j++; .%dGSDru
if (queue[k]>queue[j]) file://不用交换 Lagk
break; Pr>05lg
SortUtil.swap(queue,j,k); 5Ok3y|cEx
k = j; x4PzP
} ]%I\FefT
} #?+[|RS|
private void fixUp(int k) { FZ}^)u}o
while (k > 1) { N34-z|"q
int j = k >> 1; 4DDBf j
if (queue[j]>queue[k]) u Fw1%
break; XZ{rKf2
SortUtil.swap(queue,j,k); ev0>j4Q
k = j; ~(^pGL3<
} WUjRnzVM
} }Xk_ xQVt{
[E%g3>/mt
} l*]hUPJ
_;0RW
} CS(XN>N
+}1zw<
SortUtil： mI{Fs|9h
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package org.rut.util.algorithm; l53Q"ajG
Ywv\9KL
import org.rut.util.algorithm.support.BubbleSort; $j(d`@.DN~
import org.rut.util.algorithm.support.HeapSort; hr&&b3W3p
import org.rut.util.algorithm.support.ImprovedMergeSort; DAiS|x
import org.rut.util.algorithm.support.ImprovedQuickSort; <,0/BMz
import org.rut.util.algorithm.support.InsertSort; jjQDw=6
import org.rut.util.algorithm.support.MergeSort; q9p31b3
import org.rut.util.algorithm.support.QuickSort; TBrwir
import org.rut.util.algorithm.support.SelectionSort; oK-d58 sM
import org.rut.util.algorithm.support.ShellSort; u{va2n/
bM5V=b_H
/** nSh~mP
* @author treeroot J_7@d]0R
* @since 2006-2-2 K!qOO
* @version 1.0 ]" e'z
*/ KQb&7k.
public class SortUtil { MRXw)NAw
public final static int INSERT = 1; >q&5Z
public final static int BUBBLE = 2; T iL.py,
public final static int SELECTION = 3; d (x'\4(K
public final static int SHELL = 4; 3uxf n=E
public final static int QUICK = 5; %FM26^
public final static int IMPROVED_QUICK = 6; ab2Cn|F
public final static int MERGE = 7; -BI!ZsC'
public final static int IMPROVED_MERGE = 8; $Zo|ta^
public final static int HEAP = 9; ;]0d{
Fbu4GRgJ3
public static void sort(int[] data) { Mh2b!B
sort(data, IMPROVED_QUICK); =H8FV09x}
} 4h_YVG]ur
private static String[] name={ #]5KWXC'~
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" q2J|koT
}; N>YSXh`W`y
?;htK_E\*
private static Sort[] impl=new Sort[]{ J5F@<vi
new InsertSort(), DnJ `]r
new BubbleSort(), 'I+M*Iy
new SelectionSort(), Nu?A>Q
new ShellSort(), %*!6R:gAp
new QuickSort(), n"aF#HR?0d
new ImprovedQuickSort(), AaxQBTB
new MergeSort(), ubfh4
new ImprovedMergeSort(), ^^7@khmNl
new HeapSort() mD.6cV
}; {]8|\CcY?
$#+D:W)az
public static String toString(int algorithm){ 7g]mrI@
return name[algorithm-1]; (yi zM
} P*?|E@;s`
WA1d8nl
public static void sort(int[] data, int algorithm) { =No#/_
impl[algorithm-1].sort(data); ~GX ]K H
} oy#(]K3`O
QICxSk
public static interface Sort { B+~ /-3
public void sort(int[] data); c1i:m'b_5
} #$k1w@
%i/|}K
public static void swap(int[] data, int i, int j) { Q:Pp'[ RK
int temp = data; *yw!Y{e!9
data = data[j]; U^GVz%\
data[j] = temp; z8'zH>
} q78OP}
} LTzdg >\oJ