[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; Lt+ Cm$3
} ngprTMO$&
int i1=l; yVvO!
int i2=mid+1; JpEE'#r|
for(int cur=l;cur<=r;cur++){ y]B?{m``6
if(i1==mid+1) 7u!i)<pn
data[cur]=temp[i2++]; )z/+!y
else if(i2>r) P {x`eD0
data[cur]=temp[i1++]; GqXnOmk
else if(temp[i1] data[cur]=temp[i1++]; {H+~4XG
else >;eWgQ6V
data[cur]=temp[i2++]; aU,Zjm7fp
} (c ?OcwTH
} \f6SA{vR|
XYtDovbv&
} N<1u,[+
c rPEr
改进后的归并排序: ~F^(O{EG
QAigbSn]
package org.rut.util.algorithm.support; G[1:<Vg8
sr+* q6W
import org.rut.util.algorithm.SortUtil; Q# w`ZQX3
_-$"F>
/** lCBb0k2
* @author treeroot ?(el6J}
* @since 2006-2-2 sas}k7m"
* @version 1.0 [R[]&\W
*/ =EI>@Y"
public class ImprovedMergeSort implements SortUtil.Sort { \kU0D
w yP|#Z\
private static final int THRESHOLD = 10; TU4"7]/{M
yrOWC
/* `9BZ))Pg
* (non-Javadoc) ES[H^}|Gi
* ?IR]y-r
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) LeDty_
*/ F.2<G.9
public void sort(int[] data) { 45` i
int[] temp=new int[data.length]; fvn`$
mergeSort(data,temp,0,data.length-1); "c8 -xG
} O4w6\y3U
+eSNwR=
private void mergeSort(int[] data, int[] temp, int l, int r) { R57>z`;
int i, j, k; H`#{zt);
int mid = (l + r) / 2; r(;sX
if (l == r) ]v&)mK]n=o
return; #zflU99d
if ((mid - l) >= THRESHOLD) yd#SB)&
mergeSort(data, temp, l, mid); u~WBu|
else h"Qp e'D}
insertSort(data, l, mid - l + 1); $+CKy>
if ((r - mid) > THRESHOLD) `|maf=SnY5
mergeSort(data, temp, mid + 1, r); <d89eV+
else )Il) H
insertSort(data, mid + 1, r - mid); q<.m@q
9u6GeK~G
for (i = l; i <= mid; i++) { g\_J
temp = data; oYOR%'0*m+
} qWz%sT?C3L
for (j = 1; j <= r - mid; j++) { c>I(6$
temp[r - j + 1] = data[j + mid]; T<:mG%Is
} *AK{GfP_
int a = temp[l]; .g/PWEr\I
int b = temp[r]; v@m2c_,
for (i = l, j = r, k = l; k <= r; k++) { Nfv.v1Tt+
if (a < b) { RuyqB>[o
data[k] = temp[i++]; -rg >y!L
a = temp; e_U1}{=t
} else { `"@Pr,L
data[k] = temp[j--]; MZJ@qIg[Y
b = temp[j]; `Vph=`0
} d\c?sYLv
} ZC7ZlL_
} 'PO+P~|oa&
LtrE;+%2oz
/** |q+3X)Y
* @param data m2sf]-?Y
* @param l HNXMM
* @param i oU|yBs1
*/ E^ub8
private void insertSort(int[] data, int start, int len) { \S5YS2,P
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Y8i'=Po%,
} p.%lE!v
} vZ6_/ew8
} L0^rw|Z%'
} n]nb+_-97
T)CEcz
堆排序： ]h3{MTr/
s?Wkh`b
package org.rut.util.algorithm.support; "pA24Ze
y [jck:
import org.rut.util.algorithm.SortUtil; r &.gOC
z5tOsU
/** "aT"o
* @author treeroot U"T>L
* @since 2006-2-2 506AvD
* @version 1.0 =NNA7E7c
*/ =w,cdU*
public class HeapSort implements SortUtil.Sort{ R?Ys%~5
6+.8nx:9X
/* (non-Javadoc) *B*dWMh
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |V dr/'
*/ ^U;r>[T9h
public void sort(int[] data) { 'Dx_n7&=
MaxHeap h=new MaxHeap(); (?ofL|Cg(
h.init(data); a +lTAe
for(int i=0;i h.remove(); {Gi:W/jJ
System.arraycopy(h.queue,1,data,0,data.length); zNh$d;(O$^
} b%_[\((
g[D`.
private static class MaxHeap{ *.P3fVlZ
`21$e
void init(int[] data){ <&m `)FJ
this.queue=new int[data.length+1]; @C"w 1}
for(int i=0;i queue[++size]=data; m&I5~kD
fixUp(size); d>bS)
} WoSJp5By$
} )BX-Y@fpA
g@s'-8}X^
private int size=0; 69C>oX
Xhk_h2F[
private int[] queue; -guVl4 V
xA#'%|"
public int get() { fs3jPHZJ#
return queue[1]; _VFL}<i
} 5#}wI~U;
RI0+9YJ
public void remove() { g| M@/Dl
SortUtil.swap(queue,1,size--); ^hIKDc!.m
fixDown(1); 4SGF8y@WU
} t=6Wk4
file://fixdown SHt#%3EU
private void fixDown(int k) { f<K7m
int j; j87IxB?o
while ((j = k << 1) <= size) { 1v"r8=Wt
if (j < size %26amp;%26amp; queue[j] j++; vkg."G:=
if (queue[k]>queue[j]) file://不用交换 uJ_"gPO
break; .=% ,DT"
SortUtil.swap(queue,j,k); (Gp|K6
k = j; z<Y >phc
} >^V3Z{;
} +f]\>{o4
private void fixUp(int k) { 7nOn^f D
while (k > 1) { AOVoOd+6
int j = k >> 1; ]>'yt #]
if (queue[j]>queue[k]) 3!<} -sW4
break; B_uAa5'
SortUtil.swap(queue,j,k); oHj64fE9
k = j; u4,b%h.
} @"$rR+r'
} Ymr\8CG/
5^GFN*poig
} VQ]MJjvb
$ix*xm. 4m
} DUOSL
,`nl";Zc
SortUtil： qW(_0<E
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package org.rut.util.algorithm; mzoNXf:x
/c9%|<O%
import org.rut.util.algorithm.support.BubbleSort; 8QaF(?
import org.rut.util.algorithm.support.HeapSort; AXOR<Ns`
import org.rut.util.algorithm.support.ImprovedMergeSort; @[] A&)B
import org.rut.util.algorithm.support.ImprovedQuickSort; q oJ4w7
import org.rut.util.algorithm.support.InsertSort; Ze>Pg.k+
import org.rut.util.algorithm.support.MergeSort; 'RjMwJy{
import org.rut.util.algorithm.support.QuickSort; M~ ^ {S[o
import org.rut.util.algorithm.support.SelectionSort; ZPolE_P7
import org.rut.util.algorithm.support.ShellSort; #&jr9RB
9'S~zG%{
/** Uk0]A
* @author treeroot dtT2h>h9
* @since 2006-2-2 kn1+lF@
* @version 1.0 A_\ZY0Xt
*/ sJ(q.FRM'
public class SortUtil { ?=lnYDj
public final static int INSERT = 1; ;N/=)m
public final static int BUBBLE = 2; !s:v UY58
public final static int SELECTION = 3; H%:u9DlEK/
public final static int SHELL = 4; <(<19t5.
public final static int QUICK = 5; 5NECb4FG
public final static int IMPROVED_QUICK = 6; .1 =8c\%
public final static int MERGE = 7; UW/{q`)
public final static int IMPROVED_MERGE = 8; 7Yjxx+X9
public final static int HEAP = 9; 05>xQx?"m4
FII>6c
public static void sort(int[] data) { *;I F^u1
sort(data, IMPROVED_QUICK); >RMp`HxDf
} r31H Zx1^
private static String[] name={ _U@;Z*(%vh
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" >=Z@)PAe
}; l.wf= /
/Vy8%
private static Sort[] impl=new Sort[]{ .O+qtk!
new InsertSort(), ]CIZF,
new BubbleSort(), @`X-=GCl
new SelectionSort(), ;<yVJox
new ShellSort(), dqvgyyq
new QuickSort(), -S(_ZbeN
new ImprovedQuickSort(), VN1a\
new MergeSort(), }M I9?\"q
new ImprovedMergeSort(), cLD-,v;c
new HeapSort() i%R2#F7I
}; :8<\]}J
U.@j!UrZ
public static String toString(int algorithm){ yfD)|lK
return name[algorithm-1]; G2x5%`
} N>A*N,+
#(`@D7S"
public static void sort(int[] data, int algorithm) { h""a#n)q}`
impl[algorithm-1].sort(data); @e/40l|X
} G)E#wh_S^
m )2t<
public static interface Sort { &Z^,-Y
public void sort(int[] data); {=NHidi~
} ,6%{9oW9Z:
X|WAUp?
public static void swap(int[] data, int i, int j) { y&.[Nt '+
int temp = data; zDk^^'
data = data[j]; v$`AN4)}
data[j] = temp; `[+nz rLkO
} y/}>)o4Q
} t7%!~s=,M