[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; _5$L`&
} #YK3Ogb,
int i1=l; d3#e7rQ8
int i2=mid+1; {eQijW2Z3
for(int cur=l;cur<=r;cur++){ lQm7`+
if(i1==mid+1) |+>U91!
data[cur]=temp[i2++]; ?|!m
else if(i2>r) @l5GBsLK
data[cur]=temp[i1++]; !67xN?b
else if(temp[i1] data[cur]=temp[i1++]; \b$Y_
else P6=5:-Hh
data[cur]=temp[i2++]; ^),t=!;p
} ;W FiMM\
} ez5>V7Y
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} L 7LUy$M-<
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改进后的归并排序: WORRF
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package org.rut.util.algorithm.support; wByTNA7
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import org.rut.util.algorithm.SortUtil; \YF07L]qs-
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/** s vS)7]{cU
* @author treeroot {/>uc,8O
* @since 2006-2-2 [UB*39D7
* @version 1.0 0W+RVp=TL1
*/ bMv[.Z@v(
public class ImprovedMergeSort implements SortUtil.Sort { \%V !& !'
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private static final int THRESHOLD = 10; \0&$n
%5@> nC?`[
/* Z$6B}cz<
* (non-Javadoc) ];N/KHeZ
* E]^n\bE%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) LZE9]Gd
*/ 4-$kcwA
public void sort(int[] data) { U:[CcN/~3
int[] temp=new int[data.length]; 3 +`,'Q9
mergeSort(data,temp,0,data.length-1); fRkx ^u P
} ZjrBOb
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private void mergeSort(int[] data, int[] temp, int l, int r) { G{Uqp'=G
int i, j, k; Xf mN/j2
int mid = (l + r) / 2; :lmimAMt
if (l == r) =@X?$>'
return; Y@T$O<*
if ((mid - l) >= THRESHOLD) '0&HkM{ D
mergeSort(data, temp, l, mid); W2M[w_~QE
else %dhrXK5
insertSort(data, l, mid - l + 1); 1'dZ?`O
if ((r - mid) > THRESHOLD) ;sz_W%-;@
mergeSort(data, temp, mid + 1, r); Xr88I^F;
else (|3?wX'2U
insertSort(data, mid + 1, r - mid); B8!$?1*^a
R"\(a
for (i = l; i <= mid; i++) { dX[Xe
temp = data; ;4Xx5*E
} zN-Y=-c
for (j = 1; j <= r - mid; j++) { mS0;2xU
temp[r - j + 1] = data[j + mid]; \nL@P6X
} cHVu6I?h
int a = temp[l]; 7_lgo6
int b = temp[r]; ~~I]SI k{
for (i = l, j = r, k = l; k <= r; k++) { AgUjC
if (a < b) { =GeGlI6
data[k] = temp[i++]; z=8l@&hYLq
a = temp; n,_9Eh#WD
} else { !<b+7A
data[k] = temp[j--]; O-P`HKr
b = temp[j]; ![MtJo5
} .G"T;w6d
} tq=M 9c
} WE-+WC!!:
w7vQ6jkH
/** [=u@6Y
* @param data 0}T56aD=!
* @param l jW[EjhsH
* @param i &?}h)U#:
*/ r|/9'{!
private void insertSort(int[] data, int start, int len) { Q trU_c2k
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); XjxI@VXzUV
} zgn`@y2
} =eh!eZ9
} k RSY;V
} BV\~Dm]"
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堆排序： Qk@BM
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package org.rut.util.algorithm.support; n^l5M^.
rm|,+{
import org.rut.util.algorithm.SortUtil; 6Yqqq[#V/
vSH-hAk
/** yHZ&5
* @author treeroot uOZSX.o^
* @since 2006-2-2 PMvm4<
* @version 1.0 RL/5o"
*/ x_/H
public class HeapSort implements SortUtil.Sort{ M.C`nI4
zW.Ltz
/* (non-Javadoc) y\dx \
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) &hZ6CV{
*/ zhyf}Ta'
public void sort(int[] data) { 2j1HN
MaxHeap h=new MaxHeap(); 4e?cW&
h.init(data); |]-~yYqP3
for(int i=0;i h.remove(); eQqCRXx
System.arraycopy(h.queue,1,data,0,data.length); VjZb\ d4
} &rc r>-
uF)^mT0D=
private static class MaxHeap{ KQ(S\
Cwji,*
void init(int[] data){ E|6@h8#
this.queue=new int[data.length+1]; @9k/od@mW
for(int i=0;i queue[++size]=data; \Z~ <jv
fixUp(size); x'%vL",%
} 8*uaI7;*
} X3ZKN;
?b(DDQMf
private int size=0; M,Lq4bz
f.R;<V.)
private int[] queue; ";n%^I}
l[nf"'
public int get() { 5\}QOL
return queue[1]; (F:|tiV+
} !wro7ilMB
jd`]]FAww
public void remove() { _~*ba+{
SortUtil.swap(queue,1,size--); 7&V3f=aj6
fixDown(1); x3jjtjf
} ye| 2gH
file://fixdown =Prz|
private void fixDown(int k) { C"k]U[%{
int j; .wtYostv
while ((j = k << 1) <= size) { zThut!O
if (j < size %26amp;%26amp; queue[j] j++; (YYwn@NGj
if (queue[k]>queue[j]) file://不用交换 W)Yo-%
break; V<KjKa+sG
SortUtil.swap(queue,j,k); Xxm7s S
k = j; V:AA{<
} a3He-76
} Q"oJhxS
private void fixUp(int k) { }MM:qR
while (k > 1) { 1O90 ]c0
int j = k >> 1; Lk-h AN{[
if (queue[j]>queue[k]) }F3}"Ik'L
break; +]Z*_?j9{
SortUtil.swap(queue,j,k); M IUB]
k = j; ;;EFiaA
} owO&[D/
} p\]rxtm
1}CJ&
} gf8~Zlq4v
mDWRYIuN
} Y@b|/+
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SortUtil： b1Ba}
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package org.rut.util.algorithm; Jd33QL}Hj
of`WP
import org.rut.util.algorithm.support.BubbleSort; 3BB/u%N}
import org.rut.util.algorithm.support.HeapSort; yv> 6u7
import org.rut.util.algorithm.support.ImprovedMergeSort; ]:4\rBR3
import org.rut.util.algorithm.support.ImprovedQuickSort; g{m~TVm'
import org.rut.util.algorithm.support.InsertSort; X(C=O?A
import org.rut.util.algorithm.support.MergeSort; \Fu(IuD
import org.rut.util.algorithm.support.QuickSort; JS&;7Z$KX
import org.rut.util.algorithm.support.SelectionSort; 1_G+sDw$
import org.rut.util.algorithm.support.ShellSort; VB4ir\nF
t & 5s.
/** \6/!{D,
* @author treeroot 4HGR-S/
* @since 2006-2-2 RRGs:h@;
* @version 1.0 w4UJXc
*/ !nF.whq
public class SortUtil { pq]>Ep
public final static int INSERT = 1; m2F+6G
public final static int BUBBLE = 2; 2o0WS~}5
public final static int SELECTION = 3; [?)He} _L
public final static int SHELL = 4; X>MDX.Z
public final static int QUICK = 5; 70nBC
public final static int IMPROVED_QUICK = 6; M7(]NQ\TQ
public final static int MERGE = 7; Lcs?2c:%
public final static int IMPROVED_MERGE = 8; cvV8;
public final static int HEAP = 9; d ?,wEfwp
m khp@^5
public static void sort(int[] data) { ,u.A[{@py
sort(data, IMPROVED_QUICK); !\q'{x5C
} Acb %)Y
private static String[] name={ ;]%Syrzp
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 4uv*F:eo
}; 74KR.ABd
Z%VgAV>>
private static Sort[] impl=new Sort[]{ {XLRrU!*
new InsertSort(), :)k|Onz
new BubbleSort(), rX|{nb
new SelectionSort(), Ys@\~?ym+
new ShellSort(), e~$aJO@B.R
new QuickSort(), ban;HGGNG{
new ImprovedQuickSort(), !LpFK0rw
new MergeSort(), j|y"Lcq
new ImprovedMergeSort(), FF30VlJ
new HeapSort() OUm,;WNLf
}; F'njtrO3
sfCU"O2G
public static String toString(int algorithm){ ^<Sy{KY
return name[algorithm-1]; t\-;n:p-
} sTECNY=l
EB5^eNdL
public static void sort(int[] data, int algorithm) { (gUxS.zU
impl[algorithm-1].sort(data); oX6()FR
} i0[mU,
ezr'"1Ba}
public static interface Sort { >NBwtF>
public void sort(int[] data); >uYGY{+j[
} }A7]bd
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public static void swap(int[] data, int i, int j) { C33=<r[;N<
int temp = data; xx[l#+:c
data = data[j]; bm(.(0MI
data[j] = temp; }[ByN).
} p+:MZP -%(
} o@r~KFIe