[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; | *J-9
} ? (f44Zgm
int i1=l; '#faNVPABh
int i2=mid+1; ^S'tMT_
for(int cur=l;cur<=r;cur++){ GY;q0oQ,
if(i1==mid+1) EFKOElG(k
data[cur]=temp[i2++]; t4E=
else if(i2>r) N2_9V~!
data[cur]=temp[i1++]; h]z>H~.<*
else if(temp[i1] data[cur]=temp[i1++]; Jxy94y*
else b 7%O[
data[cur]=temp[i2++]; l-mf~{
} <DjFMTCN
} OK"B`*
P Zc{wbjp&
} wRi` L7
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改进后的归并排序: K@PQLL#yJp
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package org.rut.util.algorithm.support; kW=GFj)L
x3>PM]r(V
import org.rut.util.algorithm.SortUtil; 1~#2AdG
g~AOKHUP
/** 8x J]K
* @author treeroot 4z##4^9g
* @since 2006-2-2 w 9mi2=
* @version 1.0 @^';[P!
*/ 5V{zdS=
public class ImprovedMergeSort implements SortUtil.Sort { *1[v08?!
`/z6Q"
private static final int THRESHOLD = 10; '!6Py1i
L)LW5%.6
/* +#c3Y;JP
* (non-Javadoc) *Tt*\ O
* \|}dlG
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Q/,jv5
*/ 79svlq=
public void sort(int[] data) { W l+[{#
int[] temp=new int[data.length]; uKcwVEu
mergeSort(data,temp,0,data.length-1); #+- /0{HT
} Aey*n=V4#F
=tv,B3Mo
private void mergeSort(int[] data, int[] temp, int l, int r) { 1E*No1
int i, j, k; %EooGHGF?
int mid = (l + r) / 2; 6SIk,Isy8
if (l == r) 8C{mV^cn~
return; $`emP Hel
if ((mid - l) >= THRESHOLD) <+QXGz1
mergeSort(data, temp, l, mid); T&]J3TFJ
else x{X(Y]*1S
insertSort(data, l, mid - l + 1); xD(JkOne
if ((r - mid) > THRESHOLD) SOI$Mx
mergeSort(data, temp, mid + 1, r); %dMP}k/
else #iOoi9(
insertSort(data, mid + 1, r - mid); BF_R8H,<%
:|:Disg
for (i = l; i <= mid; i++) { -H3tBEvoI
temp = data; (,gpR4O[
} >*PZ&"}M
for (j = 1; j <= r - mid; j++) { \+cU}
temp[r - j + 1] = data[j + mid]; x)SW1U3TVx
} b$f@.L
int a = temp[l]; (1pxQ%yEA
int b = temp[r]; UtF8T6PKdW
for (i = l, j = r, k = l; k <= r; k++) { 7X$[E*kd
if (a < b) { E-\<,=bh
data[k] = temp[i++]; -];/*nl
a = temp; 4X@ <PX5
} else { 0z2A!ap
data[k] = temp[j--]; GN4'LU
b = temp[j]; K{}U[@_tS
} hy"O_Le
} ERO'{nT&
} swBgV,;
:3s5{s
/** cViEvS r
* @param data Vs-])Q?7J
* @param l 3Ms` ajJ
* @param i +ou ]|
*/ xm}9(EJ
private void insertSort(int[] data, int start, int len) { b3G4cO;t;
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); iINd*eXb^
} Ny@CP}
} G`B e~NU
} HWJ(O/N
} lw4#xH-?
fWx %?J
堆排序： CfguL@tR.
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package org.rut.util.algorithm.support; SO#NWa<0|
}7>r,
import org.rut.util.algorithm.SortUtil; ieN}Ajl2
v)*/E'Cr*
/** lLO|,
* @author treeroot J6eF7 fa
* @since 2006-2-2 .{` :
* @version 1.0 W=fw*ro
*/ .5ap9li]
public class HeapSort implements SortUtil.Sort{ B\U9F5
wo($7'.@
/* (non-Javadoc) N02X*NC
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0j^QY6
*/ :Yi1#
public void sort(int[] data) { @5!Mr5;
MaxHeap h=new MaxHeap(); U~j:b{
h.init(data); O,`#h*{N
for(int i=0;i h.remove(); /DG+8u
System.arraycopy(h.queue,1,data,0,data.length); L*xu<(>K
} Y40`~
q6h'=By
private static class MaxHeap{ 9qUc{ydt
M ABrf`<b
void init(int[] data){ eI8rnp(Ia
this.queue=new int[data.length+1]; DQ'=$z
for(int i=0;i queue[++size]=data; '->%b
fixUp(size); 5OUGln5
} "~R,%sYb(
} f}JiYZ
h0}=C_.^
private int size=0; F)ak5
{:U zW\5l)
private int[] queue; O)y|G%O
6w3z&5DY|
public int get() { k8!|WqfP
return queue[1]; #wXq'yi
} qPEtMvL #
E+LAE/v@
public void remove() { \qx$h!<
SortUtil.swap(queue,1,size--); kvWP[! j?)
fixDown(1); k3F*D
} ~*OQRl6F
file://fixdown \J*~AT~5q
private void fixDown(int k) { L*a:j
int j; [{]/9E/&
while ((j = k << 1) <= size) { 5K_KZL-
if (j < size %26amp;%26amp; queue[j] j++; N/wUP
if (queue[k]>queue[j]) file://不用交换 X$aN:!1
break; F't4Q
SortUtil.swap(queue,j,k); Wpgp YcPS
k = j; HeV6=&#
} @>>8CU^~
} :@BAiKa[wa
private void fixUp(int k) { G(g`>' m
while (k > 1) { dQX<X}
int j = k >> 1; 5*M3sN
if (queue[j]>queue[k]) >?-etl
break; x$:>W3?T=^
SortUtil.swap(queue,j,k); <gvuCydsh
k = j; `w&Y[8+E
} uw!w}1Y]}2
} J7Z`wjX1
L5(7;
} RO>3U2
uY{zZ4iw
} }BTK+Tk8
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SortUtil： s"hSn_m
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package org.rut.util.algorithm; ['<Q402:.
5<Ly^Na:
import org.rut.util.algorithm.support.BubbleSort; W9i}w&
import org.rut.util.algorithm.support.HeapSort; %2H0JXKa,
import org.rut.util.algorithm.support.ImprovedMergeSort; ?8ZOiY(
import org.rut.util.algorithm.support.ImprovedQuickSort; ^^q9+0@
import org.rut.util.algorithm.support.InsertSort; #%Z 0!
import org.rut.util.algorithm.support.MergeSort; 3X&'hz@
import org.rut.util.algorithm.support.QuickSort; O!uZykdX4!
import org.rut.util.algorithm.support.SelectionSort; K fM6(f:
import org.rut.util.algorithm.support.ShellSort; OZDd
R^v-%mG9
/** uu5AW=j
* @author treeroot |6]2XW
* @since 2006-2-2 g8=j{]~C
* @version 1.0 }>q%##<n
*/ Uq}FrK}
public class SortUtil { #6fQ$x(F#j
public final static int INSERT = 1; $w,O[PIi
public final static int BUBBLE = 2; *$%ch=
public final static int SELECTION = 3; f*Z8C9)
public final static int SHELL = 4; OTgctw1s
public final static int QUICK = 5; cSbyVC[r
public final static int IMPROVED_QUICK = 6; 8C,}nh
public final static int MERGE = 7; y7f,]<%e_
public final static int IMPROVED_MERGE = 8; tu4-##{
public final static int HEAP = 9; E#?Bn5-uBs
xqZZ(jZ
public static void sort(int[] data) { }PC_qQF
sort(data, IMPROVED_QUICK); ID{62>R
} 2p^Jqp`$
private static String[] name={ 6]%SSq&
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ,,FO6+4f
}; n(}cK@
%-lilo
private static Sort[] impl=new Sort[]{ c0I;8z`b
new InsertSort(), &ikPa,A
new BubbleSort(), e8Ul^]
new SelectionSort(), U z*7J
new ShellSort(), MNuBZnO
new QuickSort(), `_MRf[Z}
new ImprovedQuickSort(), 3I"xuKxc
new MergeSort(), 3np |\i
new ImprovedMergeSort(), _Wb3,E a=
new HeapSort() 5L?_AUL
}; `\p5!Iq Q
c @U\d<{w
public static String toString(int algorithm){ W"{:|'/v
return name[algorithm-1]; i1c z+}
} (h8RthQt
Ihn#GzM?u
public static void sort(int[] data, int algorithm) { U"qR6
impl[algorithm-1].sort(data); QIK;kjr*A3
} >'eY/>n{
(BT{\|,V_m
public static interface Sort { o4.?m6d
public void sort(int[] data); 7>-"r*W +z
} v=pkze
bZ5cKQ\6
public static void swap(int[] data, int i, int j) { 6E^h#Ozl 9
int temp = data; BN_I#8r
data = data[j]; nB|m!fi<
data[j] = temp; KbXENz&C
} {uCXF~v
} Eo) #t{{