[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; QfpuZEUK
} Hh[Tw&J4
int i1=l; ]!"S+gT*C
int i2=mid+1; tjnPyaJEl
for(int cur=l;cur<=r;cur++){ Z*!O:/B
if(i1==mid+1) JgfVRqm
data[cur]=temp[i2++]; &)9{HRP
else if(i2>r) Djt%r<
data[cur]=temp[i1++]; 3{7T4p.G
else if(temp[i1] data[cur]=temp[i1++]; TpfZ>d2
else Ty4S~ClO#'
data[cur]=temp[i2++]; 5]Da{Wmgs
} .IrNa>J~
} 4vZ4/#(x
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} 9(_{`2R8
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改进后的归并排序: J m{
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package org.rut.util.algorithm.support; &Z("D7.G
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import org.rut.util.algorithm.SortUtil; m?CZQq,
4mYCSu14:`
/** ?8V UOx
* @author treeroot s|yVAt|=
* @since 2006-2-2 [a1jCo
* @version 1.0 (c\hy53dP
*/ 2a=sm1?
public class ImprovedMergeSort implements SortUtil.Sort { PD[z#T!'
@E9" Zv-$
private static final int THRESHOLD = 10; PO-"M)M
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/* -.I4-6~
* (non-Javadoc) h)(*q+a
* !kuX,*}q
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /8ynvhF#
*/ QrYa%D+
public void sort(int[] data) { eCbf9B
int[] temp=new int[data.length]; p^)B0[P9
mergeSort(data,temp,0,data.length-1); Z9`TwS@x[
} ~W0(1# i
Kyg=$^{>G
private void mergeSort(int[] data, int[] temp, int l, int r) { VDF)zA1V
int i, j, k; k)\gWPH
int mid = (l + r) / 2; %CnxjtTo
if (l == r) OEhHR
return; W#w.h33)#6
if ((mid - l) >= THRESHOLD) X*eW#|$\
mergeSort(data, temp, l, mid); u0s8yPA
else T/r#H__`
insertSort(data, l, mid - l + 1); p]G3)s@>
if ((r - mid) > THRESHOLD) w!^~<{Kz
mergeSort(data, temp, mid + 1, r); MHj,<|8Q
else |pZUlQbb
insertSort(data, mid + 1, r - mid); m"2d$vro"
(K..k-o`.
for (i = l; i <= mid; i++) { E)N<lh
temp = data; 8AFczeg[[
} 3)Ac"nuyqH
for (j = 1; j <= r - mid; j++) { IND]j72
temp[r - j + 1] = data[j + mid]; i&Fiq&V)[
} 9]'&RyH=#
int a = temp[l]; /1w2ehE<
int b = temp[r]; :\ QUs}
for (i = l, j = r, k = l; k <= r; k++) { ?*"srE,#JX
if (a < b) { 4$6T+i2E
data[k] = temp[i++]; is^pgKX
a = temp; i{c@S:&@^
} else { 95W?{> @
data[k] = temp[j--]; h11.'Eej`
b = temp[j]; l{c]p-
} r{?TaiK
} ? zDa=7 J
} !]` #JAL7
VaONd0Z I
/** zy'D!db`Z
* @param data &}6KPA;
* @param l ksR1kvTm
* @param i eet Q}]
*/ Q4*-wF-P
private void insertSort(int[] data, int start, int len) { (7FW9X;
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); LtgXShp_!
} ,,L2(N
} Y k7-`
} tB7}|jC
} d(`AXyw
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堆排序： O\KQl0*l\\
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package org.rut.util.algorithm.support; (@0O
'T=~jA7SkT
import org.rut.util.algorithm.SortUtil; E; $+f
:aLT0q!K
/** 6.1)IQkO
* @author treeroot u"xJjS
* @since 2006-2-2 K0pac6]
* @version 1.0 sM[I4.A3
*/ _6@hTen`
public class HeapSort implements SortUtil.Sort{ UaG1c%7?X
3riw1r;Q
/* (non-Javadoc) UYP9c}_,4
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) _jU5O;
*/ Ter:sge7
public void sort(int[] data) { zvc`3
MaxHeap h=new MaxHeap(); zSvgKmNY
h.init(data); *u6Y8IL1
for(int i=0;i h.remove(); (h-*_a}F4
System.arraycopy(h.queue,1,data,0,data.length); ,Tagj`@bHc
} oB1>x^
gR^>3n'
private static class MaxHeap{ ~ (On|h
LjFqZrH
void init(int[] data){ t`'iU$:1f
this.queue=new int[data.length+1]; 6R;3%-D
for(int i=0;i queue[++size]=data; q"qo.TPh|$
fixUp(size); E\8
} Z(>'0]G
} #L}+H!Myh
va|*c22;|
private int size=0; HL3XyP7
F1%vtk;2?
private int[] queue; =QJRMF
DaHZ{T8>d
public int get() { Pl=]Srw
return queue[1]; c?2MBtnu
} J<gJc*Q
h&3YGCl
public void remove() { ZSy?T
SortUtil.swap(queue,1,size--); 9Mp$8-=>7
fixDown(1); g.JN_t5
} x"P);su
file://fixdown ?rX]x8iP
private void fixDown(int k) { HS>f1!
int j; X@)z80
while ((j = k << 1) <= size) { \<0B1m
if (j < size %26amp;%26amp; queue[j] j++; y4:H3Sk
if (queue[k]>queue[j]) file://不用交换 w9RS)l2FQ
break; 5qUTMT['T
SortUtil.swap(queue,j,k); |wE3UWsy
k = j; |H}m4-+*
} 2f`nMW
} YT/kC'A
private void fixUp(int k) { PYRd]%X
while (k > 1) { ^I6^g
int j = k >> 1; zjL.Bhiud
if (queue[j]>queue[k]) ^&/G|
break; jDM w2#<
SortUtil.swap(queue,j,k); spofLu.
k = j; ;{[>&4
} ~9\WFF/
} \qvaE+
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} DD9?V}Yx
nfW&1a
} @XD+'{]
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SortUtil： \,Lo>G`!
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package org.rut.util.algorithm; V(MFna)
jeyLL<
import org.rut.util.algorithm.support.BubbleSort; Do%-B1{ri
import org.rut.util.algorithm.support.HeapSort; \o-&f:
import org.rut.util.algorithm.support.ImprovedMergeSort; 9vNkZ-1
import org.rut.util.algorithm.support.ImprovedQuickSort; + 1IQYa|
import org.rut.util.algorithm.support.InsertSort; /"H`.LD.?
import org.rut.util.algorithm.support.MergeSort; e6B{QP#jq
import org.rut.util.algorithm.support.QuickSort; Xb !MaNm)
import org.rut.util.algorithm.support.SelectionSort; P #F=c34u
import org.rut.util.algorithm.support.ShellSort; vzel#
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/** ;|p$\26S)%
* @author treeroot I2$T"K:eo
* @since 2006-2-2 o`zr>
* @version 1.0 :!;'J/B@..
*/ yL^UE=#C_
public class SortUtil { +`M!D }!
public final static int INSERT = 1; C'=k&#<-
public final static int BUBBLE = 2; CxhY$%C (L
public final static int SELECTION = 3; d8SE,A&
public final static int SHELL = 4; Q(d9n8
public final static int QUICK = 5; rKHY?{!
public final static int IMPROVED_QUICK = 6; Fhz*&JC#
public final static int MERGE = 7; H+}"q$
public final static int IMPROVED_MERGE = 8; @UBjq%z
public final static int HEAP = 9; wfL-oi'5
R8L_J6Kpa
public static void sort(int[] data) { uJR%0E7!
sort(data, IMPROVED_QUICK); U`Jy!x2m
} .O*bILU
private static String[] name={ )4?x5#
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Ed0IWPx
}; 9jp:k><\(c
3lLMu B+
private static Sort[] impl=new Sort[]{ BYW^/B Y)
new InsertSort(), @''GPL@
new BubbleSort(), (\"k&O{
new SelectionSort(), 6ZgU"!|r
new ShellSort(), <D&)OxEn\
new QuickSort(), =z?%;4'|
new ImprovedQuickSort(), &bqT/H18
new MergeSort(), }7G8|54t
new ImprovedMergeSort(), FG3UZVUg9
new HeapSort() f"7M^1)h2%
}; {Y}dv`G#Iu
aw?=hXR!
public static String toString(int algorithm){ =z{JgD/
return name[algorithm-1]; ; UiwH
} MRr</o
\ 6EKgC1
public static void sort(int[] data, int algorithm) { h=kQ$`j6
impl[algorithm-1].sort(data); iyVB3:M
} 7f<EoSK
Z=4{Vv*
public static interface Sort { ,y9iKkg
public void sort(int[] data); lT\a2.E
} Gc.P,K/hr
2nb:)
public static void swap(int[] data, int i, int j) { 2RF^s.W
int temp = data; OI} &m^IOo
data = data[j]; d0hhMx6$
data[j] = temp; Y $g$x<7
} <]C$xp<2
} Nf3.\eR