[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; ](( >i%%~
} ztt%l #
int i1=l; k}owEBsn}
int i2=mid+1; uR[PKLh
for(int cur=l;cur<=r;cur++){ GqF.T#|
if(i1==mid+1) -p]`(S%
data[cur]=temp[i2++]; AfbA.-
else if(i2>r) R2Fh^x
data[cur]=temp[i1++]; clU3#8P!=
else if(temp[i1] data[cur]=temp[i1++]; 9jJ/ RXp
else JCMEhI6d*
data[cur]=temp[i2++]; Z~.]ZWj-
} E;+OD&|
} 1Tk\n
Yi! >8
} z]4g`K+
sGm(Aax*0
改进后的归并排序: 6d?2{_},
Z6 |'k:R8
package org.rut.util.algorithm.support; qS`|=5f
F(kRAe;
import org.rut.util.algorithm.SortUtil; %2FCpre;
lr= !:D=K
/** F7PZV+\
* @author treeroot X;[zfEB
* @since 2006-2-2 '%r@D&*vp
* @version 1.0 8 H"f9S=K
*/ "u>sS
public class ImprovedMergeSort implements SortUtil.Sort { ucm.~1G(
?;=Y1O7N(
private static final int THRESHOLD = 10; 9Z_OLai
'V1 -iJj9
/* UHDI9>G~,
* (non-Javadoc) u:>3j,Cs
* C%7,#}[U/
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9/qS*Zdh)
*/ uL{~(?U$
public void sort(int[] data) { ?@ye*%w_
int[] temp=new int[data.length]; ~{tZ;YZ
mergeSort(data,temp,0,data.length-1); >Ki]8&
} \/dm}' `
ur quVb
private void mergeSort(int[] data, int[] temp, int l, int r) { *'S%gR=Aa+
int i, j, k; }(7QJk5 j
int mid = (l + r) / 2; D0_x|a
if (l == r) g(F*Y>hk
return; h],%va[
if ((mid - l) >= THRESHOLD) 7)8}8tY^{
mergeSort(data, temp, l, mid); k=/|?%
else 2dlV'U_g
insertSort(data, l, mid - l + 1); .KMi)1L)
if ((r - mid) > THRESHOLD) 4oEq,o_
mergeSort(data, temp, mid + 1, r); u$ / ]59
else h[)aRo
insertSort(data, mid + 1, r - mid); 4 ~|TKd{
?F), 4Q
for (i = l; i <= mid; i++) { L5P}%1 _
temp = data; a/`Yh>ou
} |ssIUJ
for (j = 1; j <= r - mid; j++) { hb\Y)HSp/
temp[r - j + 1] = data[j + mid]; (dprY1noC
} ;77o%J'l
int a = temp[l]; .BB:7+
int b = temp[r]; WHk/mAI-s
for (i = l, j = r, k = l; k <= r; k++) { D{d$L9.
if (a < b) { COJ!b
data[k] = temp[i++]; Rm1`D
a = temp; CO+jB
} else { .7^-*HT}
data[k] = temp[j--]; 1X}Tp\e
b = temp[j]; a9_KQ=&CI
} JBJ7k19;
} ]O ` [v
} <UL|%9=~
9<r}s
/** p%y\`Nlgdx
* @param data Y,"MQFr(o
* @param l *U^hwL
* @param i *M<=K.*\G
*/ ]<?)(xz
private void insertSort(int[] data, int start, int len) { 1KR|i"
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); &>b1ES.>
} ;l4\^E1
} 9{#|sABGD
} 'i-O
} n\p\*wb
D}U<7=\3H
堆排序： YGmdiY:;1
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package org.rut.util.algorithm.support; +B|X k[
beR)8sC3q
import org.rut.util.algorithm.SortUtil; #E@i@'T
YfU#kvE'
/** k0uwG'(z9
* @author treeroot oKJ7i,xT
* @since 2006-2-2 <|G~S<y}
* @version 1.0 J0! E@
*/ M\6v}kUY
public class HeapSort implements SortUtil.Sort{ L=FvLii.
*g6o ;c
/* (non-Javadoc) c9@jyq_H?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ng*E9Puu[
*/ A:J{
public void sort(int[] data) { Xkm2C)
MaxHeap h=new MaxHeap(); -d)n0)9
h.init(data); !QspmCo+
for(int i=0;i h.remove(); dkp[?f)x
System.arraycopy(h.queue,1,data,0,data.length); -{%''(G
} tP{$}cEY
291|KG
private static class MaxHeap{ W A}@n
gD=5M\
void init(int[] data){ R u-rp^a
this.queue=new int[data.length+1]; jdf@lb=5l
for(int i=0;i queue[++size]=data; Z!eq/
fixUp(size); w8ld*z
} (32nI?)a
} 9?c^~77
5/ju it
private int size=0; .)zISa*Xy
c3t8yifQ
private int[] queue; "?,6{\y,
(\>'yW{f
public int get() { -Lb^O/
return queue[1]; ,4,c-
} 2H "iN[2A
,quTMtk~
public void remove() { ,?/<fxIY
SortUtil.swap(queue,1,size--); %/on\*Vh3
fixDown(1); e_-/p`9
} {jf~?/<
file://fixdown ptQ(7N
private void fixDown(int k) { 0z#kV}wE
int j; 9-6_:N>
while ((j = k << 1) <= size) { -"H4brj;G
if (j < size %26amp;%26amp; queue[j] j++; O+j:L
if (queue[k]>queue[j]) file://不用交换 :n9^:srGZH
break; N|S xAg
SortUtil.swap(queue,j,k); L|w-s4L
k = j; ! fc)
} dhkpkt<G8
} 2GzpWV(
private void fixUp(int k) { AMz=HN
while (k > 1) { W9'jzP
int j = k >> 1; Yk?q7xuT
if (queue[j]>queue[k]) G'f"w5%qZv
break; $SR]7GZ
SortUtil.swap(queue,j,k); AgJ~6tK
k = j; %T\x~)
} n<*]`do,w
} %Ege^4PE
J7vpCw2ni
} 3fTI&2:
$(=1A>40
} ]H2aYi$
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SortUtil： ,[L$
7bS[\5
package org.rut.util.algorithm; %m3efaC
p>S/6 [X
import org.rut.util.algorithm.support.BubbleSort; "|SE#k
import org.rut.util.algorithm.support.HeapSort; Z+(V \
import org.rut.util.algorithm.support.ImprovedMergeSort; xltu g##
import org.rut.util.algorithm.support.ImprovedQuickSort; FG:BRS<m~
import org.rut.util.algorithm.support.InsertSort; ppKCY4
import org.rut.util.algorithm.support.MergeSort; 1+($"$ZC&B
import org.rut.util.algorithm.support.QuickSort; Beg5[4@
import org.rut.util.algorithm.support.SelectionSort; *rT(dp!Y
import org.rut.util.algorithm.support.ShellSort; gwT,D.'Ut
V0i$"|F+E
/** wP"|$HN
* @author treeroot F\bI6gj
* @since 2006-2-2 GGtrH~zx
* @version 1.0 pSFWNWQ'B
*/ caht4N{T
public class SortUtil { GYxI$y0:
public final static int INSERT = 1; =)8fE*[s
public final static int BUBBLE = 2; l.l~K%P'h
public final static int SELECTION = 3; KW^aARJ)
public final static int SHELL = 4; a0\UL"z#+
public final static int QUICK = 5; !yrHVc
public final static int IMPROVED_QUICK = 6; 926oM77
public final static int MERGE = 7; "@$STptkc
public final static int IMPROVED_MERGE = 8; ?UDO%`X
public final static int HEAP = 9; )A=g# D#
_<Yo2,1^
public static void sort(int[] data) { %WR"85
sort(data, IMPROVED_QUICK); *`T&Dlt'8
} H_nJST<v`
private static String[] name={ 7+4"+CA
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 8ZfIh
}; 7:'>~>'
c F]3gM
private static Sort[] impl=new Sort[]{ =lQ[%&
new InsertSort(), 5AU3s
new BubbleSort(), bz]O(`
new SelectionSort(), oW6<7>1M7
new ShellSort(), $t'I*k^N
new QuickSort(), 3 ?~+5DU
new ImprovedQuickSort(), 1s[-2^D+EM
new MergeSort(), 'U$VOq?!
new ImprovedMergeSort(), e8<nPt`C
new HeapSort() ~W{h-z%q
}; v*'\w#
[S+-ovl
public static String toString(int algorithm){ C/VYu-p%
return name[algorithm-1]; *?Ef}:]
} N)WG~=Gi
X(28xbd|
public static void sort(int[] data, int algorithm) { ;NeEgqW"
impl[algorithm-1].sort(data); MiM=fIuw@s
} ][#*h`I
m]q!y3
public static interface Sort { 6qpV53H
public void sort(int[] data); $VIq)s2az|
} I]1Hi?A2
|9$'?4F
public static void swap(int[] data, int i, int j) { )m;qv'=!
int temp = data; Fxx2vTV4ag
data = data[j]; /+O8A}
data[j] = temp; 15DK\_;
} Hd`p_?3]
} -GVG1#5