[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; 5yW}#W>
} l r~>!O
int i1=l; 8@6*d.+e
int i2=mid+1; :2b*E`+
for(int cur=l;cur<=r;cur++){ <I?f=[
if(i1==mid+1) =8]Ru(#Ig
data[cur]=temp[i2++]; ne[H`7c
else if(i2>r) }\A0g}
data[cur]=temp[i1++]; uc=u4@.>
else if(temp[i1] data[cur]=temp[i1++]; pJo4&Ff
else Hg\H>Z
data[cur]=temp[i2++]; )wEXCXr!
} AGx(IK/_
} A~s6~
&u) qw}
} ZY6%%7?1
nxm*.&#p?
改进后的归并排序: k<o<!
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package org.rut.util.algorithm.support; ~X;sa,)L1+
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import org.rut.util.algorithm.SortUtil; xi.QHKBZaH
%u Dd#+{
/** ~jWpD7px
* @author treeroot UU#$Kt*frR
* @since 2006-2-2 }$@K
* @version 1.0 e&mTaCLG
*/ @ L/i
public class ImprovedMergeSort implements SortUtil.Sort { ILHn~d IC
g,RhUt9
private static final int THRESHOLD = 10; ;>]dwsA*P
Z]OX6G
/* 0h('@Hb.K#
* (non-Javadoc) lZ,$lZg9Z
* y7z ,I
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) LG?b]'#
*/ bvJ*REPL?
public void sort(int[] data) { +xr;X 9
int[] temp=new int[data.length]; 1aUu:#c
mergeSort(data,temp,0,data.length-1); #yCnM]cEn
} j{m{hVa
LH~ t5
private void mergeSort(int[] data, int[] temp, int l, int r) { iZ(p]0aP7
int i, j, k; u^L_XA
int mid = (l + r) / 2; EYZ,GT-I
if (l == r) \qJ^n %
return; &';@CeK
if ((mid - l) >= THRESHOLD) OJ7y
mergeSort(data, temp, l, mid); ?xE'i[F @
else GlT/JZ9
insertSort(data, l, mid - l + 1); S2=x,c$
if ((r - mid) > THRESHOLD) <1U *{y
mergeSort(data, temp, mid + 1, r); X(>aW*q
else D6P/39}W
insertSort(data, mid + 1, r - mid); Z~"8C Kz
7P52r
for (i = l; i <= mid; i++) { (B].ppBii
temp = data; hLyV'*}
} 8PGuZw<
for (j = 1; j <= r - mid; j++) { ;s-fYS6(>{
temp[r - j + 1] = data[j + mid]; !Ome;gS)
} y8|}bd<Sr
int a = temp[l]; iz`ys.Fu
int b = temp[r]; Lo9 \[4FP
for (i = l, j = r, k = l; k <= r; k++) { (j}edRUnB
if (a < b) { ,^T0!k$
data[k] = temp[i++]; ^P*+0?aFr
a = temp; <yKyM#4X
} else { YgkQF0+
data[k] = temp[j--]; ksqb& ux6
b = temp[j]; fp"GdkO#}i
} 3cFvS[JG
} :XO7#P
} c{/KkmI
;:Y/"5h
/** :*Z@UY
* @param data 8WG_4e
* @param l 1[". z{V3*
* @param i 4 ..V
*/ 9kas]zQ%=P
private void insertSort(int[] data, int start, int len) { 3^F1hCB
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); \@j3/!=,n%
} XP@&I[J3sI
} .@Jos^rxgJ
} Dr#V^"Dte
} < 'r<MA<
h)?Km{u%
堆排序： #pMpGw$
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package org.rut.util.algorithm.support; oeG?2!Zh
p,2H8I){
import org.rut.util.algorithm.SortUtil; 1h?:gOig
A)TO<dl
/** }ev+WIERQV
* @author treeroot (/J %Huy
* @since 2006-2-2 9OM&&Ue<E
* @version 1.0 'i8?]` T
*/ 4"V6k4i5
public class HeapSort implements SortUtil.Sort{ S)A;!}RK6
Ns[.guWu-
/* (non-Javadoc) %VgK::)r
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) d#HN'(2t
*/ JU-eoB}m
public void sort(int[] data) { bg,VK1
MaxHeap h=new MaxHeap(); l8N5}!N
h.init(data); x>[ gShAV!
for(int i=0;i h.remove(); o){<PN|z
System.arraycopy(h.queue,1,data,0,data.length); nZkMyRk
} EaN^<
-k@Uo(MB
private static class MaxHeap{ ch0x*[N@
~ZRtNL9
void init(int[] data){ Z ,98
this.queue=new int[data.length+1]; VD2o#.7*eu
for(int i=0;i queue[++size]=data; RS Vt
fixUp(size); sQa9M
} )Z@hk]@?_[
} Th5}?j7
]\J(
private int size=0; E&|EokSyN
!Ka~X!+\
private int[] queue; #0/^v*
\'Ca%j
public int get() { R&1xZFj
return queue[1]; 2rX}A3%9^^
} /d1V&Lj
_."X# }W
public void remove() { V4x6,*)e
SortUtil.swap(queue,1,size--); *|/kKvN
fixDown(1); HAMps[D[
} uGS^*W$
file://fixdown >qynd'eToR
private void fixDown(int k) { l)91v"vJ
int j; VV=6v;u`
while ((j = k << 1) <= size) { ]hA]o7k
if (j < size %26amp;%26amp; queue[j] j++; LfG$?<}hR
if (queue[k]>queue[j]) file://不用交换 Kl+4A}Uo
break; dY]iAJ
SortUtil.swap(queue,j,k); b]5S9^=LI
k = j; '5SO3/{b
} uWerC?da
} ,koG*sn
private void fixUp(int k) { l`RFi)u~&
while (k > 1) { |#(g8ua7
int j = k >> 1; L~L]MC&
if (queue[j]>queue[k]) M%FKg/
break; A/*h[N+2!
SortUtil.swap(queue,j,k); ("j*!Dsd
k = j; VufG7%S{
} .[X"+i\
} 3O'X;s2\d
U7Pn $l2!
} 8*yky
!fG`xZ~
} V@1K
>oc&hT
SortUtil： v`u>;S_
T1~,.(#
package org.rut.util.algorithm; u=p-]?
kn7Qvk[+
import org.rut.util.algorithm.support.BubbleSort; e!*%U=[Q
import org.rut.util.algorithm.support.HeapSort; m3iB`
import org.rut.util.algorithm.support.ImprovedMergeSort; {Ng HH]]O
import org.rut.util.algorithm.support.ImprovedQuickSort; ZlsdO.G
import org.rut.util.algorithm.support.InsertSort; 3+# "4O
import org.rut.util.algorithm.support.MergeSort; p4{3H+y
import org.rut.util.algorithm.support.QuickSort; 'O]Ja-
import org.rut.util.algorithm.support.SelectionSort; }=^Al;W
import org.rut.util.algorithm.support.ShellSort; U})Z4>[bvt
pNR69/wGi
/** O\qY?)
* @author treeroot <\5Y~!)
* @since 2006-2-2 \%:]o-+"I
* @version 1.0 z6Jfu:_N!
*/ H!ISQ8{V
public class SortUtil { (L6*#!Dt
public final static int INSERT = 1; X~Vr}
public final static int BUBBLE = 2; $8,/[V A
public final static int SELECTION = 3; r<L>~S>yb
public final static int SHELL = 4; ='|HUxFi
public final static int QUICK = 5; HxH=~B1"P
public final static int IMPROVED_QUICK = 6; n`)wD~mk
public final static int MERGE = 7; Zr@G
public final static int IMPROVED_MERGE = 8; PyfOBse}r
public final static int HEAP = 9; `` mi9E
O1K~]Nt
public static void sort(int[] data) { #>byP?)n
sort(data, IMPROVED_QUICK); {^n\ r^5
} 0NWtu]9QC
private static String[] name={ dd%-bI^
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" }D&fw=r"M
}; = g)G!
ec` $2u
private static Sort[] impl=new Sort[]{ tpi>$:e
new InsertSort(), spt='!)4
new BubbleSort(), n/]$k4h
new SelectionSort(), Yl6\}_h`
new ShellSort(), ~_Mz05J-\_
new QuickSort(), :-kXZe
new ImprovedQuickSort(), [,fdNxc8
new MergeSort(), )\TI^%s
new ImprovedMergeSort(), ku}I;k |
new HeapSort() l6Q75i)eF
}; #GHLF
a,N?GxK~
public static String toString(int algorithm){ nu#_,x<LS
return name[algorithm-1]; p@7[w@B\c
} /y"Y o
ihJC)m`Hbl
public static void sort(int[] data, int algorithm) { y3O Nn~k
impl[algorithm-1].sort(data); #dgWXO
} D%Y{(l+X
K9y!ZoB
public static interface Sort { nC5
public void sort(int[] data); NK@G0p~O
} ?geEq'
,\K1cW~U5
public static void swap(int[] data, int i, int j) { /U%Xs}A)
int temp = data; pMX#!wb
data = data[j]; z<F.0~)jb
data[j] = temp; AQ 5CrYb
} ~xg1mS9d
} Q`}n;DV