[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; h#nQd=H<g#
} tTt~W5lo
int i1=l; W@=ilW3RD
int i2=mid+1; //|Vj | =
for(int cur=l;cur<=r;cur++){ A@r,A?(
if(i1==mid+1) J>35q'nN]F
data[cur]=temp[i2++]; yL-L2
else if(i2>r) t"fD"Xpj
data[cur]=temp[i1++]; ],|B4\b;
else if(temp[i1] data[cur]=temp[i1++]; !NjE5USi
else RwWQ$Eb_s
data[cur]=temp[i2++]; H2vEFnV
} <ZEA&:p
} |zKcL3*
R2@u[
} <Vb{QOgc;
7j8_O@_
改进后的归并排序: QZol(2~Y
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package org.rut.util.algorithm.support; %s>E@[s
$)!Z"2T
import org.rut.util.algorithm.SortUtil; 0saEcJ-
v]~[~\|a
/** WW=7QCi
* @author treeroot ?|\Lm3%J
* @since 2006-2-2 h>?OWI
* @version 1.0 M;R>]wP"V
*/ Tx_LH"8
public class ImprovedMergeSort implements SortUtil.Sort { 7Z_iQ1
)SuJK.IF
private static final int THRESHOLD = 10; 3]acfCacC
VbjW$?
/* p WHu[Fu
* (non-Javadoc) .anL}OA_q
* vNIQc "\-
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) q`hg@uwA{`
*/ 2X`M&)"X
public void sort(int[] data) { cf9y0
int[] temp=new int[data.length]; 566EMy|
mergeSort(data,temp,0,data.length-1); DNPK1e3a{
} r+Y1m\
i{2KMa{K
private void mergeSort(int[] data, int[] temp, int l, int r) { 5|Qr"c$p
int i, j, k; z5I<,[`
int mid = (l + r) / 2; H@zpw1fH+
if (l == r) -84Z8?_
return; A:f+x|[
if ((mid - l) >= THRESHOLD) a$ }^z
mergeSort(data, temp, l, mid); .JE7vPv%!
else @)B_e*6>'
insertSort(data, l, mid - l + 1); 6C:Lq%}
if ((r - mid) > THRESHOLD) @,]v'l!u
mergeSort(data, temp, mid + 1, r); TR|; /yJ
else })B)-8
insertSort(data, mid + 1, r - mid); 7Do)++t
DWI!\lK
for (i = l; i <= mid; i++) { lk80)sTZ
temp = data; ag6S"IXh
} KGIz)/eSg
for (j = 1; j <= r - mid; j++) { ee0J;pP2#
temp[r - j + 1] = data[j + mid]; WKG=d]5
} 08Q:1 '
int a = temp[l]; L>B0%TP^
int b = temp[r]; _R]h]<TQ
for (i = l, j = r, k = l; k <= r; k++) { m#Cp.|>kP4
if (a < b) { f: Rh9
data[k] = temp[i++]; U+KbvkX wj
a = temp; #r1x0s40D
} else { ]n+:lsiV
data[k] = temp[j--]; I ?1E}bv
b = temp[j]; gVGq
} , Le_PJY)
} -I -wdyDr
} &5B+8>
?F-,4Ox{/
/** nJ,56}
* @param data ,"D1!0
* @param l }Eav@3h6
* @param i 6c2fqAF>i
*/ * 08LW|:,
private void insertSort(int[] data, int start, int len) { !54%}x)3
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); k=LY 6
} O&}07(
} )T>a|.
} 62W3W1: W
} h.67]U7m
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堆排序： _%t w#cM
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package org.rut.util.algorithm.support; 0Vg8o @
^0r@",
import org.rut.util.algorithm.SortUtil; }RD,JgmV
9Vp$A$7M
/** 4-m}W;igu
* @author treeroot R8ZW1
* @since 2006-2-2 rIu>JyC"p
* @version 1.0 UOa{J|k>h
*/ &R 0BuFL8
public class HeapSort implements SortUtil.Sort{ aUd633
(j2]:BVu
/* (non-Javadoc) hRME;/r]X
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) -q-%)f
*/ c^m}ep\F5L
public void sort(int[] data) { ]+J]}C]\d
MaxHeap h=new MaxHeap(); -1fT2e
h.init(data); HSTtDTo
for(int i=0;i h.remove(); r=s7be
System.arraycopy(h.queue,1,data,0,data.length); ~x824xW
} f9;M"Pd
Lw3Z^G
private static class MaxHeap{ 3uN;*f
CA{c-kG
void init(int[] data){ T,k`WR
this.queue=new int[data.length+1]; gPDc6{/C<
for(int i=0;i queue[++size]=data; ;0ake%v]
fixUp(size); d kPfdK}G
} RsY|V|<
} KpSHf9!&[
%h3CQk
private int size=0; !)ee{CwNc
e5MX5 T^
private int[] queue; >i=mw5`D]
)bqO}_B
public int get() { xaejG/'iK
return queue[1]; %|4Nmf$:Og
} o4tQ9X=}
$n!saPpxS
public void remove() { Rs7=v2>I
SortUtil.swap(queue,1,size--); )|3?7?X
fixDown(1); |]^OX$d
} $5:j" )$,
file://fixdown uTngDk
private void fixDown(int k) { {i3]3V"Xp
int j; `}"*i_0-5'
while ((j = k << 1) <= size) { N_Yop
if (j < size %26amp;%26amp; queue[j] j++; IrJCZsk
if (queue[k]>queue[j]) file://不用交换 !\2Xr{f
break; zaa>]~g.
SortUtil.swap(queue,j,k); ,SH))%Cyt
k = j; o|$l+TC
} zJOL\J'
} fC52nK&T8
private void fixUp(int k) { ^ola5wD
while (k > 1) { YqrieDFay!
int j = k >> 1; g7rn|<6FI
if (queue[j]>queue[k]) _|`S9Nms
break; C8%q?.nH=
SortUtil.swap(queue,j,k); rOEk%kJ
k = j; b+9M? k"
} V`m'r+ Y
} :[?hU}9
JT#jJ/^
} {rBS52,Z#
p~6/
} { owK~
fKb8)PDP
SortUtil： Z`Rrv$M!
Nyip]VwMJ
package org.rut.util.algorithm; uPQ:}zL2
B;@7
import org.rut.util.algorithm.support.BubbleSort; fczId"
import org.rut.util.algorithm.support.HeapSort; |gg6|,Bt4
import org.rut.util.algorithm.support.ImprovedMergeSort; 4f:B2x{
import org.rut.util.algorithm.support.ImprovedQuickSort; jTH,GF
import org.rut.util.algorithm.support.InsertSort; v=R=K
import org.rut.util.algorithm.support.MergeSort; V)mitRaV
import org.rut.util.algorithm.support.QuickSort; Vf:/Kokq
import org.rut.util.algorithm.support.SelectionSort; 1Ue)&RW
import org.rut.util.algorithm.support.ShellSort; :q/%uca9
K!;Z#$iw[
/** UOC>H%r~M?
* @author treeroot [W;iR_7T5
* @since 2006-2-2 tN&4t xB
* @version 1.0 pX `BDYg.
*/ q'fZA;
public class SortUtil { aEM2xrhy,
public final static int INSERT = 1; P>j^w#$n
public final static int BUBBLE = 2; 6 GqR]KD
public final static int SELECTION = 3; y@Z@ eK3
public final static int SHELL = 4; xp7`[.
public final static int QUICK = 5; c@>Tzk%?"
public final static int IMPROVED_QUICK = 6; FL*qV"r^n
public final static int MERGE = 7; XEl-5-M"
public final static int IMPROVED_MERGE = 8; ;89 `!V O
public final static int HEAP = 9; T)?:q
7u73v+9qn:
public static void sort(int[] data) { |WwC@3)
sort(data, IMPROVED_QUICK); gqJSz}'
} H0r@dn
private static String[] name={ I7,5ID4pn
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" F,5~a_GP?
}; W;!OxOWZJ
5+Fr/C
private static Sort[] impl=new Sort[]{ (dmLEt
new InsertSort(), rO4R6A
new BubbleSort(), wX<w)@
new SelectionSort(), i;B &~
new ShellSort(), ?"04u*u3
new QuickSort(), ?i'N9 /(
new ImprovedQuickSort(), j.or:nF
new MergeSort(), 1seWR"
new ImprovedMergeSort(), I8};t b#
new HeapSort() X\&CQiPS
}; F/p/&9
+guCTGD:
public static String toString(int algorithm){ lidVe]>
return name[algorithm-1]; r)<c ~\0 7
} hNU$a?eVpR
`st3iTLZY
public static void sort(int[] data, int algorithm) { %[S-"k
impl[algorithm-1].sort(data); k0r93xa
} +q*WY*gX
,i RUR8
public static interface Sort { "xWrYq'"
public void sort(int[] data); !U::kr=t
} lC.Q61J@
dbga >j
public static void swap(int[] data, int i, int j) { xB4}9zN s
int temp = data; Wdk]>w 'L
data = data[j]; UA4="/
data[j] = temp; Z-%zR'-?*
} 65]>6D43
} *? V boyU