[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; f(zuRM^5
} >ZOZv
int i1=l; ;9- 4J
int i2=mid+1; 's%ct}y\J
for(int cur=l;cur<=r;cur++){ ir1RAmt%
if(i1==mid+1) Jq=>H@il
data[cur]=temp[i2++]; Qcy+ {j]
else if(i2>r) ;_;H(%uY
data[cur]=temp[i1++]; NEjBjLJZ
else if(temp[i1] data[cur]=temp[i1++]; QRn:=J%W W
else ^{:[^$f:l
data[cur]=temp[i2++]; s^x ,S
} *jqPKK/
} '!2
'j=PbA
} 4'u|L&ow
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改进后的归并排序: |7 W6I$Xl
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package org.rut.util.algorithm.support; >goAf`sqo
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import org.rut.util.algorithm.SortUtil; .(.G`aKnF
g^|_X1{
/** DNTRLIKa
* @author treeroot vzT6G/
* @since 2006-2-2 '@1Qx~*]e
* @version 1.0 q'U-{~q%
*/ 'e8d["N
public class ImprovedMergeSort implements SortUtil.Sort { @a{v>)
S@rsQ@PA
private static final int THRESHOLD = 10; FPM}:c4
l.LFlwt
/* !&:.Uh
* (non-Javadoc) +[go7A$5
* j^R~ Lt4
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) W(3~F2
*/ )SO1P6
public void sort(int[] data) { V3Rnr8
int[] temp=new int[data.length]; ]q\=
mergeSort(data,temp,0,data.length-1); X/C54%T ~
} 1pBsr(
PT5ni6
private void mergeSort(int[] data, int[] temp, int l, int r) { fn"jYSy
int i, j, k; ~O3uje_
int mid = (l + r) / 2; A_$Mt~qKi^
if (l == r) d4rJ?qw
return; _}%#Yz
if ((mid - l) >= THRESHOLD) */@bNT9BgO
mergeSort(data, temp, l, mid); ^IegR>
else [!|d[
insertSort(data, l, mid - l + 1); !t [%'!v
if ((r - mid) > THRESHOLD) BsG[#4KM:
mergeSort(data, temp, mid + 1, r); KARQKFp!C>
else LZ<(:S
insertSort(data, mid + 1, r - mid); ur_"m+
/Gu2@m[r
for (i = l; i <= mid; i++) { )6S}O* 1
temp = data; N4JL.(m){I
} (VF4]
for (j = 1; j <= r - mid; j++) { jjlCi<9CQ^
temp[r - j + 1] = data[j + mid]; ;`Ch2b1+
} $/sZYsN~T
int a = temp[l]; Q\th8/ /
int b = temp[r]; zAdVJ58H
for (i = l, j = r, k = l; k <= r; k++) { ? Gu_UW
if (a < b) { _O71r}4
data[k] = temp[i++]; 2ZFKjj
a = temp; T<~[vjA
} else { iZqFVr&JF
data[k] = temp[j--]; LFry?HO,D
b = temp[j]; Rhxm)5+
} loVvr"&g
} XzwQ,+IAr
} BN>$LL
AG!a=ufc0
/** \7?MUa.4
* @param data AZ@Zo'
* @param l YedipYG9;
* @param i q|_ 5@Ly
*/ !ES#::;z?
private void insertSort(int[] data, int start, int len) { LR?#H)$
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); wEn&zZjx
} 9w<_XXQ
} ]d;/6R+Vs
} I&@@v\$*
} \:^n-D*fX
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堆排序： ].+G-<.:
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package org.rut.util.algorithm.support; _ r)hr7
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import org.rut.util.algorithm.SortUtil; p{QKj3ov
u>Kvub
/** "k@/Z7=
* @author treeroot JA2}
* @since 2006-2-2 ^bw~$*"j#
* @version 1.0 vX)Y%I
*/ -5*;J&.
public class HeapSort implements SortUtil.Sort{ ^x#RUv
KTREOOu .t
/* (non-Javadoc) S~9kp?kR$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) w3hL.Z,kV
*/ |?Uc:VFF
public void sort(int[] data) { B_G7F[/K
MaxHeap h=new MaxHeap(); ZuV
h.init(data); \) ONy9
for(int i=0;i h.remove(); ?UZyu4O%
System.arraycopy(h.queue,1,data,0,data.length); GM92yi!8
} D#AxgF_He
3W WxpTU
private static class MaxHeap{ 1j-i nj`
h$h`XBVZe;
void init(int[] data){ /]>{"sS(
this.queue=new int[data.length+1]; I>zn$d*0
for(int i=0;i queue[++size]=data; E8 )*HOT_T
fixUp(size); 30-wTcG
} fxa^SV
} /1GZN *I
a{6|[aR
private int size=0; AFA*_9Ut
aM1JG$+7G
private int[] queue; U7'oI;C$e
wBGxJ\+M
public int get() { u _^=]K;
return queue[1]; N%i<DsK.u6
} 9~af\G
{u][q &n
public void remove() { id9T[^h
SortUtil.swap(queue,1,size--); Q)dns)_x
fixDown(1); f%l#g]]
} : s3Vl
file://fixdown 9e6{(
private void fixDown(int k) { mw%_yDZ{
int j; >U.uRq
while ((j = k << 1) <= size) { 8#AXK{
if (j < size %26amp;%26amp; queue[j] j++; PUo&>
if (queue[k]>queue[j]) file://不用交换 . 2Q/D?a
break; q+Q)IVaU81
SortUtil.swap(queue,j,k); ,g.=vQm:?
k = j; h2snGN/{Hb
} k9?+9bExXA
} 40ZB;j$l
private void fixUp(int k) { c *noH[
while (k > 1) { arrcHf4O
int j = k >> 1; o%7yhCY
if (queue[j]>queue[k]) D/>5\da+y
break; a-=apD1RvG
SortUtil.swap(queue,j,k); w+D5a VJ
k = j; $cCB%}
} q>Y[.c-
} ddxv.kIj.
6U]7V
} 6<6_W#
iDN,}:<V
} Grv|Wuli
m#p^'}]!;
SortUtil： D.f=!rT7E7
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package org.rut.util.algorithm; i>}z$'X
85]UrwlA4
import org.rut.util.algorithm.support.BubbleSort; p:))ne:7
import org.rut.util.algorithm.support.HeapSort; g#*N@83C
import org.rut.util.algorithm.support.ImprovedMergeSort; !9NAm?Fw
import org.rut.util.algorithm.support.ImprovedQuickSort; WDR!e2G
import org.rut.util.algorithm.support.InsertSort; nrS_t y
import org.rut.util.algorithm.support.MergeSort; G}*B`m
import org.rut.util.algorithm.support.QuickSort; :4d7%q
import org.rut.util.algorithm.support.SelectionSort; 8&bj7w,K
import org.rut.util.algorithm.support.ShellSort; ,j<"~"] =
1C{n\_hR
/** b*i+uV?
* @author treeroot &kBs'P8>
* @since 2006-2-2 !8].Z"5J
* @version 1.0 =%`"
*/ bHM .&4G
public class SortUtil { yuBBO:\.
public final static int INSERT = 1; 6iC:l%|u
public final static int BUBBLE = 2; h'+ swPh
public final static int SELECTION = 3; i:72FVo
public final static int SHELL = 4; 8!fwXm
public final static int QUICK = 5; ,5,4Qf7
public final static int IMPROVED_QUICK = 6; Tc:`TE=2
public final static int MERGE = 7; AJmzg
public final static int IMPROVED_MERGE = 8; :W"ITY(
public final static int HEAP = 9; 2)YLs5>W%
5**xU+&
public static void sort(int[] data) { xl$ Qw'
sort(data, IMPROVED_QUICK); u1l#k60
} 3-5lO#&#
private static String[] name={ Heu@{t.[!D
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" xh$[E&2u
}; b;vO`
YzqhFFaj.
private static Sort[] impl=new Sort[]{ V Euv
new InsertSort(), D6pk!mS
new BubbleSort(), Z)~2{)
new SelectionSort(), _JS'~JO3{
new ShellSort(), &V$R@~x
new QuickSort(), $}@ll^
new ImprovedQuickSort(), Yc}b&
new MergeSort(), \T?O.
new ImprovedMergeSort(), ;Xns9
new HeapSort() tti.-
}; $6N.ykJ
v)06`G
public static String toString(int algorithm){ l3,|r QD
return name[algorithm-1]; 3 0Z;}<)9
} vEkz5$
rcOmpgew
public static void sort(int[] data, int algorithm) { ~p.23G]x
impl[algorithm-1].sort(data); R\^tr
} [(XKqiSV
Ue7~rPdlR
public static interface Sort { '4iu0ie>D
public void sort(int[] data); Jx]`!dP3
} 'E9jv4E$n
i \~4W$4I
public static void swap(int[] data, int i, int j) { o9CB ,c7]
int temp = data; (DU{o\=
data = data[j]; _ i8}ld-
data[j] = temp; 9Z=Bs)-y.
} Y`wi=(
} WG,{:|!E