[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; "D4% A!i
} >e-0A
int i1=l; E^{!B]/oP
int i2=mid+1; GZx*A S]+
for(int cur=l;cur<=r;cur++){ Ke:EL;*8k
if(i1==mid+1) ~W4SFp
data[cur]=temp[i2++]; yEh{9S%6p
else if(i2>r) If&y 5C
data[cur]=temp[i1++]; 3gJZlH5IR
else if(temp[i1] data[cur]=temp[i1++]; (igB'S5wf
else 6'uCwAQU
data[cur]=temp[i2++]; aEa+?6;D
} bJ6C7-w:wa
} ,|zzq@fk
g$Vr9MH
} k}}'fA
)ryPK"V
改进后的归并排序: 0/!0W%f[}
sc# EL~
package org.rut.util.algorithm.support; d9jD?HgM(
7042?\\=
import org.rut.util.algorithm.SortUtil; {(Mmv[y
&dni6E4
/** 1BEc"
* @author treeroot rp1+K4]P
* @since 2006-2-2 ]8$H'u(C
* @version 1.0 CZ$B2i6
*/ ~5Mj:{B
public class ImprovedMergeSort implements SortUtil.Sort { k*,+ag*j
*D[yA
private static final int THRESHOLD = 10; Q]K$yo
P&:[pPG
/* eFA,xzp
* (non-Javadoc) %WmTG }L)
* { JDD"z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) mZ:#d;0
*/ !SnLvW89Z
public void sort(int[] data) { uD{ xs
int[] temp=new int[data.length]; '+g[n
mergeSort(data,temp,0,data.length-1); &?xmu204
} i tk/1
w"QZ7EyJ
private void mergeSort(int[] data, int[] temp, int l, int r) { "VoufXM:
int i, j, k; mtE+}b@(!&
int mid = (l + r) / 2; {%y|A{}c
if (l == r) ! jDopE0L
return; MI:%Eq
if ((mid - l) >= THRESHOLD) )4:]gx#cr
mergeSort(data, temp, l, mid); sD{Wc%5
else LH`2Y,E
insertSort(data, l, mid - l + 1); gnxD'1_
if ((r - mid) > THRESHOLD) XsFzSm
mergeSort(data, temp, mid + 1, r); E GZiWBr
else A+4Kj~`!
insertSort(data, mid + 1, r - mid); 7&%#bMnw
3kF+wifsz
for (i = l; i <= mid; i++) { L?&&4%%
temp = data; {&B0kjf
} !g=b=YK
for (j = 1; j <= r - mid; j++) { m9&%A0
temp[r - j + 1] = data[j + mid]; Lz:FR*
} ORWi+H|
int a = temp[l]; g:G5'pZf
int b = temp[r]; +`ov1h
for (i = l, j = r, k = l; k <= r; k++) { u5KAwMw%Q
if (a < b) { ,7k1n{C)
data[k] = temp[i++]; 87!m l
a = temp; e5 zi"~
} else { H/;AlN|!
data[k] = temp[j--]; EdSUBoWF}
b = temp[j]; fZ;}_wR-H
} |Sua4~yL(
} -:J<JX)o
} \n^[!e"`
|R!ozlL{}
/** 2Yd@V}
* @param data Vx>Q
* @param l aD_7^8>
* @param i ucU7 @j
*/ PCV#O63[
private void insertSort(int[] data, int start, int len) { ozl!vf# kv
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 19!;0fe=
} {Ja(+NQ
} unbIfl=
} X')l04P@%
} 0G33hIOS
u7Ix7`V
堆排序： ;fN^MW@&[
qK9A /Mc
package org.rut.util.algorithm.support; Fpeokr"i
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import org.rut.util.algorithm.SortUtil; ZU+_nWnl
t+]1D@hv
/** >gM"*Laa?
* @author treeroot _G'A]O/BZD
* @since 2006-2-2 >kmgYWG
* @version 1.0 Oe :S1f
*/ r3-<~k-
public class HeapSort implements SortUtil.Sort{ `NEi/jB
lQvgq
/* (non-Javadoc) 4gNN "
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) vNl)ltzJF
*/ cs9h\]ZA
public void sort(int[] data) { =NI?Jk*iAq
MaxHeap h=new MaxHeap(); "+wkruC
h.init(data); V3r)u\ o'
for(int i=0;i h.remove(); u U>L (
System.arraycopy(h.queue,1,data,0,data.length); wAX;)PLg
} :l1-s]
mU?~s7
private static class MaxHeap{ 4>vO9q
cL;%2TMk
void init(int[] data){ 1EC;t1.7
this.queue=new int[data.length+1]; ]j6K3
for(int i=0;i queue[++size]=data; }HmkTk
fixUp(size); ]vn*eqd
} W83PMiN"T-
} '-[hy>t
d ePk}Sn
private int size=0; vq+CW?*"
oSkQ/5hg.
private int[] queue; T6=|)UTe1
g}gGm[1SUo
public int get() { Q@>1z*'I
return queue[1]; 6-TYOUm
} ~_N,zw{x
!k*B-@F
public void remove() { F --b,,
SortUtil.swap(queue,1,size--); n8_X<jIp3
fixDown(1); >3KlI
} 3\ Mt+!1{
file://fixdown {#,5C H')
private void fixDown(int k) { &B[*L+-E
int j; hif;atO
while ((j = k << 1) <= size) { fKqr$59>
if (j < size %26amp;%26amp; queue[j] j++; }5(_gYr
if (queue[k]>queue[j]) file://不用交换 q0Q[]|L
break; !&g_hmnIF
SortUtil.swap(queue,j,k); sCzpNJ"8
k = j; I]+ zG
} _|0#
} rg k1.0U0
private void fixUp(int k) { e@0|fB%2
while (k > 1) { )xa)$u
int j = k >> 1; ol/@)k^s>
if (queue[j]>queue[k]) ~/-SKGzo-
break; ]?D$n
SortUtil.swap(queue,j,k); ~K3Lbd| r
k = j; [7gz?9VyLF
} 0|tyKP|J
} YtSYe%
h'=)dFw7
} % R25, V
50-7L,
} N~CQh=<
VV/T)qEe7>
SortUtil： #iv4L
#I0FWZ>W
package org.rut.util.algorithm; XIbxi
6O6B8
import org.rut.util.algorithm.support.BubbleSort; ro<w8V9.a
import org.rut.util.algorithm.support.HeapSort; ^" g?m
import org.rut.util.algorithm.support.ImprovedMergeSort; (UjaL@G
import org.rut.util.algorithm.support.ImprovedQuickSort; U= f9b]Y
import org.rut.util.algorithm.support.InsertSort; 1 Vt,5o5
import org.rut.util.algorithm.support.MergeSort; v@[3R7|4
import org.rut.util.algorithm.support.QuickSort; pqpsa'
import org.rut.util.algorithm.support.SelectionSort; XA;PWl5!
import org.rut.util.algorithm.support.ShellSort; s-Yu(X2
RS}_cm0
/** !9$}1_,is
* @author treeroot JJWPte/
* @since 2006-2-2 wk8fa
* @version 1.0 y|MhV/P04
*/ M*3G
public class SortUtil { l6w\E=K
public final static int INSERT = 1; OQ_<Vxz
public final static int BUBBLE = 2; F#<:ZByjJ@
public final static int SELECTION = 3; i_AD3Jrs
public final static int SHELL = 4; Khi6z&B
public final static int QUICK = 5; 5p!{#r6m
public final static int IMPROVED_QUICK = 6; sgK =eBE
public final static int MERGE = 7; WeH_1$n5
public final static int IMPROVED_MERGE = 8; }DjVZ48
public final static int HEAP = 9; Vfy@?x= &
%_Lz0L64k
public static void sort(int[] data) { 1/:vFX
sort(data, IMPROVED_QUICK); {{P 3Z[
} zFO0l).
private static String[] name={ e> 9X
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ]$s)6)kW
}; O ] !tK
$=E4pb4Y
private static Sort[] impl=new Sort[]{ 2oahQ: }B
new InsertSort(), 5TuwXz1v
new BubbleSort(), (&Q!5{$W
new SelectionSort(), K*Ba;"Ugeg
new ShellSort(), oP56f"BE(
new QuickSort(), |/l] ]+
new ImprovedQuickSort(), CXoiA"P
new MergeSort(), }E(w@&
new ImprovedMergeSort(), LNk :PD0m
new HeapSort() Hc\@{17
}; 8NNh8k#6
Y9#dAI[Gce
public static String toString(int algorithm){ Wkk(6gS,
return name[algorithm-1]; xV14Y9
} I(BJ1 8F$
Fng
public static void sort(int[] data, int algorithm) { -b?M5P*:
impl[algorithm-1].sort(data); @YaI5>,/
} >ZPu$=[W
LHZsmUM(dg
public static interface Sort { s1Wn.OGR4
public void sort(int[] data); KV;q}EyG
} ,Q Ge=Exn
h2mHbe43
public static void swap(int[] data, int i, int j) { 1qn/*9W}=
int temp = data; *!`&+w
data = data[j]; 8o,0='U
data[j] = temp; 0k\,z(e
} E,?IIRg&
} =>'j_|