[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; qL2!\zt>g
} E>_N|j)9
int i1=l; 1#tFO
int i2=mid+1; n Nu~)X
for(int cur=l;cur<=r;cur++){ {gT4Oq__
if(i1==mid+1) /dI8o
data[cur]=temp[i2++]; pgUp1goAU
else if(i2>r) }vK8P r%
data[cur]=temp[i1++]; e92,@
else if(temp[i1] data[cur]=temp[i1++]; NdxPC~Z+
else 6K7DZ96L
data[cur]=temp[i2++]; unvS`>)Np
} K&4FFZ
} Wr+/9
.RW&=1D6
} z"%{SI^
eL" +_lW
改进后的归并排序: @oKW$\
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package org.rut.util.algorithm.support; #IvHxSo&
3-Bz5sj9
import org.rut.util.algorithm.SortUtil; A'6-E{
"UYlC0 S\
/** >BWe"{;
* @author treeroot n:"0mWnL$y
* @since 2006-2-2 !-HJ%(5:F
* @version 1.0 `;Od0uh
*/ :lU#Dm]
public class ImprovedMergeSort implements SortUtil.Sort { 0}mVP
gT_tR_g
private static final int THRESHOLD = 10; h~pQ
6c6w w"
/* 9;Qgby
* (non-Javadoc) #J'V,_wH
* 7S/\;DF
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) yz7Fe
*/ 7u`:e,'
public void sort(int[] data) { A$3ll|%j
int[] temp=new int[data.length]; Egt!N
mergeSort(data,temp,0,data.length-1); #g#[|c.
} f4;V7DJ
Cy\ o{6
private void mergeSort(int[] data, int[] temp, int l, int r) { sK@]|9ciQ
int i, j, k; dvcLZK
int mid = (l + r) / 2; 50e vWD
if (l == r) 3~%M4(
return; :sX4hZK=G
if ((mid - l) >= THRESHOLD) 9 lXnNK |]
mergeSort(data, temp, l, mid); qTz5P
else SFjRSMi
insertSort(data, l, mid - l + 1); 7Hg;SK6t0
if ((r - mid) > THRESHOLD) 8b"vXNB.f
mergeSort(data, temp, mid + 1, r); ':|E$@$W
else 5SEGV|%
insertSort(data, mid + 1, r - mid); LEg ?/!LIT
kq*IC&y
for (i = l; i <= mid; i++) { weMufT
temp = data; 2WS Wfh
} yu}T><Wst
for (j = 1; j <= r - mid; j++) { $}EI3a
temp[r - j + 1] = data[j + mid]; T"DG$R,Aj
} /%F5u}eW
int a = temp[l]; p4uN+D`.U
int b = temp[r]; DfjDw/{U3L
for (i = l, j = r, k = l; k <= r; k++) { NC3XJ 4
if (a < b) { A;TNR
data[k] = temp[i++]; qtjx<`EK>
a = temp; m 0]1(\%
} else { Am<){&XT ]
data[k] = temp[j--]; qzWnl[3
b = temp[j]; 6?';ip
} 8&:dzS
} V#+M lN
} ZEB,Q~
%_(^BZd
/** 62o nMY
* @param data Ju"/#@
* @param l [U,hb1Wi3
* @param i s(:N>K5*
*/ PKZMuEEy,
private void insertSort(int[] data, int start, int len) { * $|9e
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); jA3xDbM
} 3F9dr@I.7
} lQL/I[}
} $\aJ.N6rb
} 4|hfzCjMI
7g4IAsoD
堆排序： ?NxaJ^
Xc9NM1bp=
package org.rut.util.algorithm.support; #iT3aou
&r!jjT
import org.rut.util.algorithm.SortUtil; ]V,#>'
^3C%&
/** $e%m=@ga
* @author treeroot RijFN.s
* @since 2006-2-2 R=C+]
* @version 1.0 "d*-k R
*/ brdY97s4
public class HeapSort implements SortUtil.Sort{ n],"!>=+
7Q|v5@;pU
/* (non-Javadoc) .X"\ Mg
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ^@$T>SB1
*/ |H%,>r`9S
public void sort(int[] data) { VO<P9g$UD
MaxHeap h=new MaxHeap(); '/fueku
h.init(data); fS4 Ru
for(int i=0;i h.remove(); EdCcnl?R6
System.arraycopy(h.queue,1,data,0,data.length); SpMHq_MLM
} 36d6KS 7
yW;]J87*
private static class MaxHeap{ ~"cqFdnO
,[u.5vC
void init(int[] data){ lGEfI&1%!
this.queue=new int[data.length+1]; 17lc5#^L
for(int i=0;i queue[++size]=data; Aj+0R?9tG
fixUp(size); %.s"l6 W
} 5ZjM:wrF|
} RCMO?CBe
,ysn7Y{Y
private int size=0; oYX#VX
mW#p&{
private int[] queue; `<?((l%;R
~Dj_N$_+9
public int get() { tj:>o#D
return queue[1]; O*1la/~m
} u:>*~$f
?ehUGvV2
public void remove() { (y?`|=G-xT
SortUtil.swap(queue,1,size--); wTn"
fixDown(1); \P9HAz'6
} *KPNWY9!W
file://fixdown << aAYkx<
private void fixDown(int k) { { pu .l4nk
int j; '.zr:l
while ((j = k << 1) <= size) { !%'c$U2
if (j < size %26amp;%26amp; queue[j] j++; AAK}t6
if (queue[k]>queue[j]) file://不用交换 #+;0=6+SM
break; ^S^7u
SortUtil.swap(queue,j,k); ?Q: KW
k = j; :2MHx}]il
} 5dhT?/qvc
} xilA`uw`1
private void fixUp(int k) { HNV"'p;
while (k > 1) { Cc` )P>L
int j = k >> 1; Q46sPMH+_
if (queue[j]>queue[k]) M9wj };vy
break; WC 5v#*Jd
SortUtil.swap(queue,j,k); y_Nn%(j
k = j; \E,Fe:/g
} yQ+C}8r5
} lR3JyYY{X
J,^eq@(
} 6n'XRfQp)&
vLh,dzuo
} D4ud|$s1
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SortUtil： 1 =9 Kwd
d=:&tOCg2
package org.rut.util.algorithm; 0& ?/TSC
!J+< M~o}
import org.rut.util.algorithm.support.BubbleSort; f"A?\w@
import org.rut.util.algorithm.support.HeapSort; ,7izrf8
import org.rut.util.algorithm.support.ImprovedMergeSort; #zw 'H9l
import org.rut.util.algorithm.support.ImprovedQuickSort; H3jb{S b
import org.rut.util.algorithm.support.InsertSort; q/t~`pH3
import org.rut.util.algorithm.support.MergeSort; VK?c='zg
import org.rut.util.algorithm.support.QuickSort; AME6Zu3Y
import org.rut.util.algorithm.support.SelectionSort; IF.6sJg:
import org.rut.util.algorithm.support.ShellSort; F anA~
S-)%#
/** \S"YLRn"
* @author treeroot 9h 0^_|"
* @since 2006-2-2 /(skIvE|
* @version 1.0 !_=3Dz
*/ ]0)=0pc]E
public class SortUtil { Q2ky|
public final static int INSERT = 1; oS_<;Fj
public final static int BUBBLE = 2; ZYD3[" ~x
public final static int SELECTION = 3; 7I<];j
public final static int SHELL = 4; )qx,>PL
public final static int QUICK = 5; i:,37INMt
public final static int IMPROVED_QUICK = 6; "6fTZ<
public final static int MERGE = 7; `)s>},8W!
public final static int IMPROVED_MERGE = 8; 7=x]p
public final static int HEAP = 9; z'ZGN{L
qddP-uN
public static void sort(int[] data) { &d^u$Y5
sort(data, IMPROVED_QUICK); \i$WXW]|
} rWMG_eP:
private static String[] name={ PEX(*GS
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" c`h/x>fa
}; C/x<_VJzN/
x?MSHOia`P
private static Sort[] impl=new Sort[]{ y~pJ|E
new InsertSort(), :$>TeCm
new BubbleSort(), 6dq*ncNin
new SelectionSort(), CGkCLd*s]
new ShellSort(), 0`dMT>&I
new QuickSort(), o`]u&
new ImprovedQuickSort(), XK4idC
new MergeSort(), e(m#elX
new ImprovedMergeSort(), = A;B-_c
new HeapSort() ghd*EXrF H
}; 1f^4J~{
C) "|sG
public static String toString(int algorithm){ *R^ulp[W
return name[algorithm-1]; h_Cac@F0
} G(XI TL u*
7J@D})si
public static void sort(int[] data, int algorithm) { Ii9@ j1-g
impl[algorithm-1].sort(data); )pAN_e"
} yPqZ ,
aj<=]=hr
public static interface Sort { `+/xA\X]
public void sort(int[] data); Ge]2g0
} ;f7;U=gl,
XABI2Ex
public static void swap(int[] data, int i, int j) { >-{)wk;1&
int temp = data; Z:PsQ~M
data = data[j]; 9V=bV=4:
data[j] = temp; j7)Xm,wI8
} 2So7fZa^wg
} U ExK|t