[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; a~?B/ g&_
} AN3oh1xe:
int i1=l; z?pi/`y8>
int i2=mid+1; 8 Vf#t!t
for(int cur=l;cur<=r;cur++){ Kj)sL0
if(i1==mid+1) 41P0)o
data[cur]=temp[i2++]; >'4$g7o,
else if(i2>r) RA?_j$
data[cur]=temp[i1++]; 9MH;=88q
else if(temp[i1] data[cur]=temp[i1++]; ^+~5\c*
else $0vWC#.A]
data[cur]=temp[i2++]; Y% JE})
} yEk|(6+^
} wE"lk
kR3wbA
} Xu E' %;:
&nwS7n1eb
改进后的归并排序: pU'${Z~b
M?DZShkV_
package org.rut.util.algorithm.support; /q}(KJX
/nsBUM[;
import org.rut.util.algorithm.SortUtil; HDTA`h?t;
[+QyKyhTO
/** `wZ
* @author treeroot y5F"JjQAa
* @since 2006-2-2 Hpa6;eT
* @version 1.0 w,up`W7,
*/ K\xnQeS<W
public class ImprovedMergeSort implements SortUtil.Sort { QT zN
`JY+3d,Ui
private static final int THRESHOLD = 10; E)`0(Z:E
/KNR;n'
/* *rbgDaQ
* (non-Javadoc) &-{%G=5~e%
* M$Bb,s
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) QmSMDWkh
*/ 'n>44_7L
public void sort(int[] data) { %hN(79:g
int[] temp=new int[data.length]; ,i|K} Y&
mergeSort(data,temp,0,data.length-1); E_I-.o|
} pJs`/
,A $IFE
private void mergeSort(int[] data, int[] temp, int l, int r) { (F 9P1Iq
int i, j, k; rsa_)iBC
int mid = (l + r) / 2; U;IGV~oT
if (l == r) MgJ5FRQ
return; Ook\CK*nKe
if ((mid - l) >= THRESHOLD) CM$&XJzva
mergeSort(data, temp, l, mid); rk4KAX_[
else :*BN>*1^\r
insertSort(data, l, mid - l + 1); :3XvHL0rx
if ((r - mid) > THRESHOLD) _'17C/
mergeSort(data, temp, mid + 1, r); 4n@>gW
else he/rt#
insertSort(data, mid + 1, r - mid); pdER#7Tq
e$P^},0/
for (i = l; i <= mid; i++) { D\+x/r?-I
temp = data; 4H;7GNu
} GD)paTwO<
for (j = 1; j <= r - mid; j++) { ,YjjL
temp[r - j + 1] = data[j + mid]; 04&S.#+(
} qo7<g*kf~
int a = temp[l]; Mpyza%zj
int b = temp[r]; !/tV}.*
for (i = l, j = r, k = l; k <= r; k++) { yUD@oOVC0
if (a < b) { YgjW%q
data[k] = temp[i++]; .a :7|L#a
a = temp; ,jeHL@>w[
} else { 74:( -vS
data[k] = temp[j--]; !vRN'/(Vyu
b = temp[j]; N\&VJc
} 2;*G!rE&*`
} 0tL5t7/Gr
} d}fd^x/
EPLHw
/** <*z'sUh+}
* @param data ,r~^<m
* @param l {d'B._#i
* @param i ?lgE9I]
*/ r>|S4O
private void insertSort(int[] data, int start, int len) { X_nbNql
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Oi& 9FS
} Sin)]zG~0
} UMBeY[?
} G~.VW48{n
} x=a#|]ngG
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堆排序： 9z{}DBA
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package org.rut.util.algorithm.support; #y7MB6-
rA8NE>
import org.rut.util.algorithm.SortUtil; RA!m,"RM
mt0v (
/** i <gt`UCO
* @author treeroot 04=RoYMM
* @since 2006-2-2 ^`dMjeF
* @version 1.0 *oIIcE4g7
*/ W^Fkjqpv
public class HeapSort implements SortUtil.Sort{ fV7 k{dR
2?Ryk`2i)
/* (non-Javadoc) U?|A3;,xh
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !BrZTo
*/ 9}2/ko
public void sort(int[] data) { e@vZg8Ie
MaxHeap h=new MaxHeap(); g#l!b%$
h.init(data); 35AH|U7b
for(int i=0;i h.remove(); tC$+;_=+F
System.arraycopy(h.queue,1,data,0,data.length); j|o/>^ 'e
} ? eI)m
n} !')r
private static class MaxHeap{ /Us+>vg!
dc~vQDNw[X
void init(int[] data){ K%BFR,)g
this.queue=new int[data.length+1]; ^/Yk*Ny
for(int i=0;i queue[++size]=data; ^t<L
fixUp(size); ;,TT!vea
} --TH6j"
} n%;tVa
fM:bXR2Y'
private int size=0; kO^
2,B^OZmw
private int[] queue; ~Ni-}p
Wt!;Y,1s
public int get() { imwn)]LR
return queue[1]; knHrMD;
} XAF]B,h=
%jq R^F:J
public void remove() { xDekC~Zq
SortUtil.swap(queue,1,size--); Bqa_l|
fixDown(1); @W(,|xES
} jL5O{R[ x:
file://fixdown ^tm2Duv
private void fixDown(int k) { ;UX9Em
int j; >dF #1
while ((j = k << 1) <= size) { GpO@1 C/
if (j < size %26amp;%26amp; queue[j] j++; _h=h43'3
if (queue[k]>queue[j]) file://不用交换 #q0xlF@
break; #\Q)7pgi.
SortUtil.swap(queue,j,k); W0U|XX!&
k = j; F/A)2 H_
} CnY dj~
} 4U)%JK.ta
private void fixUp(int k) { j9RpYz
while (k > 1) { kIt1kw
int j = k >> 1; e*Nm[*@UW
if (queue[j]>queue[k]) [vY)y\W{
break; EOqV5$+
SortUtil.swap(queue,j,k); ji,`?
k = j; >2mY%
} _J"J[$
} biffBC:q
ahM?;p
} c-@EHv
yFFNzw{
} T%}x%9VO7
+{)V%"{u:
SortUtil： |?' gT"#
vl%Pg!l
package org.rut.util.algorithm; 7#*O|t/'
aM8z_j!!u
import org.rut.util.algorithm.support.BubbleSort; &|zV Wl
import org.rut.util.algorithm.support.HeapSort; 5KYR"-jY
import org.rut.util.algorithm.support.ImprovedMergeSort; waV4~BdL
import org.rut.util.algorithm.support.ImprovedQuickSort; K~5(j{Kb8
import org.rut.util.algorithm.support.InsertSort; ,0>_(5
import org.rut.util.algorithm.support.MergeSort; X)[QEq^
import org.rut.util.algorithm.support.QuickSort; ;%u)~3B$JK
import org.rut.util.algorithm.support.SelectionSort; dwzk+@]8
import org.rut.util.algorithm.support.ShellSort; u8y('\(
2@ZuH^qhk
/** CFY4PuI"!
* @author treeroot W$" >\A0%
* @since 2006-2-2 !$o9:[B
* @version 1.0 E/ku VZX
*/ jz&=8
public class SortUtil { &hhxp1B
public final static int INSERT = 1; Rg~[X5
public final static int BUBBLE = 2; \nVoBW(
public final static int SELECTION = 3; _&@cU<bdee
public final static int SHELL = 4; uk.x1*0x
public final static int QUICK = 5; i2Gh!5]f
public final static int IMPROVED_QUICK = 6; H{d/%}7[v
public final static int MERGE = 7; U.WMu%
public final static int IMPROVED_MERGE = 8; k}{K7,DM
public final static int HEAP = 9; n^epC>a"b
(G"/C7q
public static void sort(int[] data) { KiNluGNt
sort(data, IMPROVED_QUICK); L=<,+m[!
} uC`)?f*I
private static String[] name={ W?12'EG}xa
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" =OA7$z[
}; OPKmYzf@b
C9T-4o1
private static Sort[] impl=new Sort[]{ jRjQDK_"ka
new InsertSort(), Rmh,P>
new BubbleSort(), <,T#* fg
new SelectionSort(), !{oP'8Ax$
new ShellSort(), SY2((!n._
new QuickSort(), R&}{_1dj8
new ImprovedQuickSort(), Z:MU5(Te
new MergeSort(), pC)S9Kl
new ImprovedMergeSort(), $4TawFf"nc
new HeapSort() ~x+24/qT
}; f^XfIH_#
eJ$ {`&J
public static String toString(int algorithm){ B;L^!sLP
return name[algorithm-1]; UC9w T
} HR k^KB
/#?i+z
public static void sort(int[] data, int algorithm) { :w c.V
impl[algorithm-1].sort(data); s0'Xihsw6
} <QE/p0.
\hZ9in`YlR
public static interface Sort { <.6$zcW
public void sort(int[] data); 9hs7B!3pc>
} !1?Nc}T0Q&
~E7=c3:"
public static void swap(int[] data, int i, int j) { gLv";"4S
int temp = data; PR1%
data = data[j]; ~7=w,+
data[j] = temp; Wv)2dD2I
} We#O'm
} KY;E.D`