[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; =2 *rA'im
} 0pSmj2/,.
int i1=l; yZWoN&
int i2=mid+1; >B>CB3U
for(int cur=l;cur<=r;cur++){ {iq3|x2[:
if(i1==mid+1) OGY"<YH6
data[cur]=temp[i2++]; YOJ6w
else if(i2>r) E(i[o?
data[cur]=temp[i1++]; SM^-Z|d?
else if(temp[i1] data[cur]=temp[i1++]; f +hjC
else DU=dLE6-P;
data[cur]=temp[i2++]; _fwb!T}$
} ~%2pp~1K
} LE%7DW(
sQ8s7l0D
} L-9~uM3@\
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改进后的归并排序: &V)6!,rb
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package org.rut.util.algorithm.support; -!8(bjlJ&
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import org.rut.util.algorithm.SortUtil; ${8?N:>t
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/** Y+3!f#exm
* @author treeroot sk|=% }y
* @since 2006-2-2 |0,vQv
* @version 1.0 dCFlM&(i
*/ GTJ{h
public class ImprovedMergeSort implements SortUtil.Sort { c c
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private static final int THRESHOLD = 10; Ea(,aVlj
~RD+.A
/* aSP4a+\*
* (non-Javadoc) uZi.HG{<)
* ;2m<CSv!D
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :ah 5`nmPO
*/ [Ym
public void sort(int[] data) { Rl6\#C*
int[] temp=new int[data.length]; Vj!rT <@
mergeSort(data,temp,0,data.length-1); wP/A^Rs
} Eaqca{%/^
9Ok9bC'?8@
private void mergeSort(int[] data, int[] temp, int l, int r) { J4YBqp
int i, j, k; :ZDMNhUl &
int mid = (l + r) / 2; ph2$oO 6,
if (l == r) Oi} T2I
return; &Sp -w?kM
if ((mid - l) >= THRESHOLD) nPUqMn'
mergeSort(data, temp, l, mid); k'X;ruQ:tF
else >Ng)k]G
insertSort(data, l, mid - l + 1); dz[ bm<T7
if ((r - mid) > THRESHOLD) 1w"8~Z:UXV
mergeSort(data, temp, mid + 1, r); LZ~"VV^
else $M:3XAN
insertSort(data, mid + 1, r - mid); Em7 WDu0
J# kl 7
for (i = l; i <= mid; i++) { n& $^04+i
temp = data; !JBae2Z
} {5|("0[F
for (j = 1; j <= r - mid; j++) { |([R'Orm
temp[r - j + 1] = data[j + mid]; /1`cRyS
} }!TL2er_
int a = temp[l]; Bg8#qv
int b = temp[r]; z5]bia,
for (i = l, j = r, k = l; k <= r; k++) { *{o UWt
if (a < b) { =?X$Yaw*
data[k] = temp[i++]; ` rm?a0
a = temp; 90xk$3(
} else { BN,>&1I
data[k] = temp[j--]; lHB) b}7E
b = temp[j]; [ REf>_R
} C}5M;|%3)
} jtm?z c
} ]8;n{ }X
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/** >`jU`bR@
* @param data H UWxPIu
* @param l .C]cK%OO N
* @param i 3^=+gsc
*/ jKIc09H|
private void insertSort(int[] data, int start, int len) { 5HS~op2n/
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); q*)+K9LRk
} rbqo"g`
} Wn|&cG9
} N]YtLa,t
} Jg$xO@.
q|)Q9+6$+
堆排序： ]+H?@*b`
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package org.rut.util.algorithm.support; rgcWRt
W0cgI9=9
import org.rut.util.algorithm.SortUtil; e1q"AOV6
R\s!*)
/** nF)uTk
* @author treeroot [XlB<P=|>
* @since 2006-2-2 "'Z- UV
* @version 1.0 [*m2
*/ 4QJ8Z t
public class HeapSort implements SortUtil.Sort{ ] q~<=
P|jF6?C
/* (non-Javadoc) SJgY
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Dmdy=&G
*/ 8n?kZY$,
public void sort(int[] data) { 9j|gdfb%ml
MaxHeap h=new MaxHeap(); %zo= K}u
h.init(data); l+y-Fo@
for(int i=0;i h.remove(); 34|a:5c
System.arraycopy(h.queue,1,data,0,data.length); AN9[G
} 5c-N0@\
(S^ck%]]a!
private static class MaxHeap{ EqM;LgE=
F:37MUQi
void init(int[] data){ +K6szGP
this.queue=new int[data.length+1]; #NRh\Wj|
for(int i=0;i queue[++size]=data; dX )W0
fixUp(size); /2NSZO
} s.jO<{
} ,7d|O}B
o`r(`6@
private int size=0; YTyX`Y#
+iF 1sC_
private int[] queue; #^mqQRpgq
^~L}<]
public int get() { ?Hy+'sq[
return queue[1]; rlznwfr7+
} QYThW7S
~S(^T9R
public void remove() { mgkyC5)d
SortUtil.swap(queue,1,size--); pvXcLR)L+3
fixDown(1); ^i_Iqph=
} {8NwFN.
file://fixdown eXy"^xp^
private void fixDown(int k) { XrN- 2HTV
int j; B/eaqJ
while ((j = k << 1) <= size) { _|,{ ^m|d
if (j < size %26amp;%26amp; queue[j] j++; =K$,E4*
if (queue[k]>queue[j]) file://不用交换 SQ#7PKH
break; +2T!z=
SortUtil.swap(queue,j,k); WtX>Qu|
k = j; oO=o|w|T
} 7!2 HNg
} t<b3K-
private void fixUp(int k) { ?~2Bi^W5
while (k > 1) { !0fI"3P@r
int j = k >> 1; x,Y5U+]E
if (queue[j]>queue[k]) |pWaBh|r
break; # .q#OC
SortUtil.swap(queue,j,k); u.6P-yh
k = j; u3dsQU
} .2X2b<%)
} Gq]d:-7l
]h~o],:
} D[>W{g $
^9ng)
} 2@MN]Low
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SortUtil： (@]tG?I=
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package org.rut.util.algorithm; Hq xK\m%,.
*W^=XbG
import org.rut.util.algorithm.support.BubbleSort; 8B@JFpg^
import org.rut.util.algorithm.support.HeapSort; #/WAzYt{
import org.rut.util.algorithm.support.ImprovedMergeSort; A8dI:E+$
import org.rut.util.algorithm.support.ImprovedQuickSort; 8wF#e\Va0
import org.rut.util.algorithm.support.InsertSort; &=-PRza%j
import org.rut.util.algorithm.support.MergeSort; x N`T
import org.rut.util.algorithm.support.QuickSort; $A?}a
import org.rut.util.algorithm.support.SelectionSort; En5!"w|j
import org.rut.util.algorithm.support.ShellSort; KU2$5[~j
fI11dE9&?[
/** R [9w
* @author treeroot Kpg:yrc['
* @since 2006-2-2 "T*I|
* @version 1.0 aIu2>
*/ R=35 7^[R
public class SortUtil { .3g&9WvN!Z
public final static int INSERT = 1; /J;]u3e|
public final static int BUBBLE = 2; v>at/ef
public final static int SELECTION = 3; ; J2-rh
public final static int SHELL = 4; pbdF]>\
public final static int QUICK = 5; 6_ ]8\n
public final static int IMPROVED_QUICK = 6; (9z|a,
public final static int MERGE = 7; sV'v* 1|
public final static int IMPROVED_MERGE = 8; <bX 1,}?
public final static int HEAP = 9; lJj&kVHb
>a9l>9fyY
public static void sort(int[] data) { RHXvee55
sort(data, IMPROVED_QUICK); yjeL9:jH[
} b_ JWnh
private static String[] name={ ;fx1!:;.
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" YZ*{^'
}; lWlUWhLnP
ZvyjMLf
private static Sort[] impl=new Sort[]{ acP ;(t
new InsertSort(), uWrFunh%
new BubbleSort(), uTw|Q{f
new SelectionSort(), CK Mv7
new ShellSort(), tGqQJT#mr7
new QuickSort(), .~22^k
new ImprovedQuickSort(), )rbc;{.
new MergeSort(), fMzYFM'i
new ImprovedMergeSort(), TnxU/)
new HeapSort() 2mq%|VG'
}; r?afv.@L2
(NM6micc
public static String toString(int algorithm){ 1:YAn
return name[algorithm-1]; xBt<Yt"
} +/}_%Cf8
(L:`ojiU
public static void sort(int[] data, int algorithm) { &]*|6cR$E
impl[algorithm-1].sort(data); ?KCxrzf
} >&[3
[[&)cbv
public static interface Sort { o6/Rx#A
public void sort(int[] data); pr)K{~m]{<
} 9kUV1?
w2@"PGR
public static void swap(int[] data, int i, int j) { UMv"7~
int temp = data; /Q]:Uf.J
data = data[j]; KKV)DExv?
data[j] = temp; SUo^c1)G
} OAY8,C=M
} ~X[S<Gi#