[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; s9O2k}]
} Qqc]aVRF
int i1=l; w_Uh
int i2=mid+1; 9pLg+6O
for(int cur=l;cur<=r;cur++){ r8[T&z@_
if(i1==mid+1) dz-y}J11
data[cur]=temp[i2++]; )K;]y-Us[
else if(i2>r) U%>'"
data[cur]=temp[i1++]; /7/0x ./{
else if(temp[i1] data[cur]=temp[i1++]; O("Uq../3
else fPqr6OYz
data[cur]=temp[i2++]; [&#/|zH'j:
} c?E{fD"Fc3
} 6B" egYv
&;c>O
} L(G92,.
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改进后的归并排序: n?xTkkr0
s^hR\iY
package org.rut.util.algorithm.support; o6a0'vU><
e,gyQjJR
import org.rut.util.algorithm.SortUtil; ZVih=Y-w
5l{Ts04k%
/** Kz?#C
* @author treeroot Z7a945Jd
* @since 2006-2-2 7TX2&kMoc
* @version 1.0 !%)]56(
*/ MYdO jcN
public class ImprovedMergeSort implements SortUtil.Sort { /7"I#U^u/
-c*\o3)
private static final int THRESHOLD = 10; n3KI+I%nQ
f&KdlpxKv
/* I&VTW8jB
* (non-Javadoc) 6'vbT~S!
* Dw6fmyJ:
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) uLR<FpM
*/ eiVC"0-c}
public void sort(int[] data) { eWs&J24
int[] temp=new int[data.length]; A7Po 3n%Q
mergeSort(data,temp,0,data.length-1); qv*7K@
} I/6)3su%
nz]&a1"&
private void mergeSort(int[] data, int[] temp, int l, int r) { UL$}{2N,_
int i, j, k; fyknP)21I
int mid = (l + r) / 2; S\i@s_
if (l == r) sD;M!K_
return; zp}eLm:=d
if ((mid - l) >= THRESHOLD) 49H+(*@v@
mergeSort(data, temp, l, mid); };L ^w:
else &7e)O=
insertSort(data, l, mid - l + 1); Yf@e=:
if ((r - mid) > THRESHOLD) X}ma]
mergeSort(data, temp, mid + 1, r); W/$Zvl
else }_9,w;M$
insertSort(data, mid + 1, r - mid); W-Hoyn>?2
>$WQxbwM(
for (i = l; i <= mid; i++) { {i0SS
temp = data; >Gml4vGK
} FzQTDu9
for (j = 1; j <= r - mid; j++) { {%lXYMyu
temp[r - j + 1] = data[j + mid]; bV+(b9
} Q_-_^J
int a = temp[l]; #'D" 'B
int b = temp[r]; ULrr=5&8
for (i = l, j = r, k = l; k <= r; k++) { !G^L/?z3
if (a < b) { #6Fez`A
data[k] = temp[i++]; o1W:ox?kO
a = temp; kft#R#m
} else { DI+]D~N
data[k] = temp[j--]; g8qgk:}
b = temp[j]; X[ q+619
} dI&!e#Y
} 3.22"U\1:
} `ps)0!L L`
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/** :I -V_4b
* @param data D]w!2k%V
* @param l -p3Re9
* @param i w(kf
*/ x~xa6
private void insertSort(int[] data, int start, int len) { w0w G-R ?
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); mxb(<9O
} O"Ku1t!
} 3)-/`iy#
} mPI8_5V8]
} 06$!R/K
hxCvk/7sT
堆排序： }cT_qqw(f%
'YNT8w/3
package org.rut.util.algorithm.support; :Y9NLbv
fRg`UI4w}
import org.rut.util.algorithm.SortUtil; ^Ge+~o?x
4`JH&))}
/** #fT*]NN
* @author treeroot V&-~x^JK
* @since 2006-2-2 w"R:\@ F
* @version 1.0 9U$EJN_G
*/ ,-7R(iMd
public class HeapSort implements SortUtil.Sort{ 1V8-^
z9aY]lHY
/* (non-Javadoc) K|dso]b/
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) w)Covz'uf
*/ PRz/inru-
public void sort(int[] data) { LX^u_Iu
MaxHeap h=new MaxHeap(); \Y"Wu
h.init(data); #1>X58I^
for(int i=0;i h.remove(); 3B1cb[2y
System.arraycopy(h.queue,1,data,0,data.length); T49zcJf;
} ?O>V%@
7Hm3;P.
private static class MaxHeap{ lP<:tR~K
xO-+i\ ZV
void init(int[] data){ qWmQ-|Py
this.queue=new int[data.length+1]; &^W|iXi#
for(int i=0;i queue[++size]=data; Fd0%lnui
fixUp(size); !Q#{o^{Y~
} ,?L2wl[
} kT;S4B
8']9$#
private int size=0; br|;'i%(
TY1I=8
private int[] queue; L:FoSCN Y(
O} f80K
public int get() { )E~79!
return queue[1]; \EVBwE,
} Hla0 5N' 4
>Z1sb n
public void remove() { daYx76yP_?
SortUtil.swap(queue,1,size--); >Q(3*d >
fixDown(1); b j'Xg
} V3"=w&2]K
file://fixdown 7AObC4 g
private void fixDown(int k) { uvrB5=u
int j; |o\8
while ((j = k << 1) <= size) { ;aw=MV
if (j < size %26amp;%26amp; queue[j] j++; [D!jv"
if (queue[k]>queue[j]) file://不用交换 ~J P=T
break; -4cXRv]
SortUtil.swap(queue,j,k); +(h\fm7*-
k = j; ~8]NK&J
} %HL*c=
} B&@?*^.
private void fixUp(int k) { UXh9:T'%
while (k > 1) { V>b\[(=s
int j = k >> 1; L|,!?cSAT
if (queue[j]>queue[k]) Cvf[/C+
break; CO`_^7o9(
SortUtil.swap(queue,j,k); S;)w.
k = j; Qc pm!
} ZSG9t2qlv
} (JM5`XwM
}b-g*dn]5
} `5C,N!d8X
f`;j:O
} 8@tPm$
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SortUtil： bLwAXW2K+
hy`?E6=9+
package org.rut.util.algorithm; GgB,tam{p
D8xmE2%
import org.rut.util.algorithm.support.BubbleSort; |y2w9n0D
import org.rut.util.algorithm.support.HeapSort; ;NHt7p8SE
import org.rut.util.algorithm.support.ImprovedMergeSort; } x2DT8u
import org.rut.util.algorithm.support.ImprovedQuickSort; lb3]$Da
import org.rut.util.algorithm.support.InsertSort; W`u[h0\c
import org.rut.util.algorithm.support.MergeSort; z[3L2U~6
import org.rut.util.algorithm.support.QuickSort; SF>c\eTtx
import org.rut.util.algorithm.support.SelectionSort; o<|P9#(U"
import org.rut.util.algorithm.support.ShellSort; ,d{"m)r<
, T8>}U(
/** IWY;="
* @author treeroot D>LZP!
* @since 2006-2-2 u)~C;f)
* @version 1.0 !y@6Mm
*/ 2u5|8
public class SortUtil { MpF$xzh
public final static int INSERT = 1; yc?a=6q'm
public final static int BUBBLE = 2; %'X[^W
public final static int SELECTION = 3; Np"exFqN k
public final static int SHELL = 4; :>Ay^{vf=
public final static int QUICK = 5; <c2'0I >
public final static int IMPROVED_QUICK = 6; jW 3c"
public final static int MERGE = 7; [D<1CF
public final static int IMPROVED_MERGE = 8; 9R7A8
public final static int HEAP = 9; jbS\vyG
M)2VcDy
public static void sort(int[] data) { Bi @2
sort(data, IMPROVED_QUICK); +Zaj,oEE
} xo&]$W8
private static String[] name={ 34Kw!
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" x3o]U)^
}; v#U"pn|M
N _86t
private static Sort[] impl=new Sort[]{ V;,{}
new InsertSort(), n}!PO[m~
new BubbleSort(), % a@>_
new SelectionSort(), ):b$xNn
new ShellSort(), pUV/Ul]
new QuickSort(), YLiSbLz1
new ImprovedQuickSort(), (q(~de
new MergeSort(), 7~5ym15*
new ImprovedMergeSort(), i;_tI#:A
new HeapSort() /#m=*&!CB
}; Fd[zDz
7r~~Y%=C|
public static String toString(int algorithm){ mjKS{
return name[algorithm-1]; 3%%o?8ES
} Nw1#M%/!r!
k[:bQ)H
public static void sort(int[] data, int algorithm) { t3&LO~Ye
impl[algorithm-1].sort(data); {;:/-0s
} 4<lRPsvgc
ucG@?@JENm
public static interface Sort { YTexv;VNb|
public void sort(int[] data); 3v5%y'
} i03w1pSH,
n8".XS
public static void swap(int[] data, int i, int j) { |~X ;1j!
int temp = data; NqDHCI
data = data[j]; =[@zF9
data[j] = temp; :n.f_v}6
} ?MgUY)X
} c0;t4( &8