[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; o(q][:,h
} li`4&<WGC
int i1=l; 3Mlwq'pzD
int i2=mid+1; vwc)d{ND
for(int cur=l;cur<=r;cur++){ 7y/Pch
if(i1==mid+1) )|Il@unp/
data[cur]=temp[i2++]; 8Ev,9
else if(i2>r) [Y%H8}
data[cur]=temp[i1++]; @a[Y[FS
else if(temp[i1] data[cur]=temp[i1++]; )9PP3"I
else eG F{.]
data[cur]=temp[i2++]; 0}:wM':G
} |K7zN\ Wq
} }BR@vY'd
sy s6 V?
} "c'K8,+?
MT?;9ZV}
改进后的归并排序: b+6%Mu}o
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package org.rut.util.algorithm.support; ~8htg8CZ`
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import org.rut.util.algorithm.SortUtil; /8s+eHn&%
/4Q^L>a
/** ~AX@o-WU
* @author treeroot Mu~DB:Y9e
* @since 2006-2-2 u#>*"4Q
* @version 1.0 5Vj t!%?r
*/ fNh0?/3)
public class ImprovedMergeSort implements SortUtil.Sort { _$f XK
O! t> @%)
private static final int THRESHOLD = 10; +hW^wqk/.
j/h>G,>T=
/* z4UJo!{S
* (non-Javadoc) 'u)zQAaw.
* kpQXnDm2
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 7^3a296
*/ E7c!KJ2
public void sort(int[] data) { SFaG`T=
int[] temp=new int[data.length]; i_KAD U&mP
mergeSort(data,temp,0,data.length-1); ~Wox"h}(
} .w@o%AO_
~\C.Nm
private void mergeSort(int[] data, int[] temp, int l, int r) { ^rP` .Z
int i, j, k; /2&:sHWW
int mid = (l + r) / 2; AfV a[{E
if (l == r) Hyj<Fqr!.
return; Vw P+tM
if ((mid - l) >= THRESHOLD) <,Z6=M`
mergeSort(data, temp, l, mid); F(5(cr 7K
else TSPFi0PP
insertSort(data, l, mid - l + 1); lZI?k=rWv
if ((r - mid) > THRESHOLD) m%[Ul@!V
mergeSort(data, temp, mid + 1, r); :I)WSXP9h
else wQnW2)9!
insertSort(data, mid + 1, r - mid); LKx<hl$O
SD=kpf;
for (i = l; i <= mid; i++) { c[n4{q1
temp = data; 7E}.P1
} 6(9S'~*'R
for (j = 1; j <= r - mid; j++) { }r)T75_1
temp[r - j + 1] = data[j + mid]; #*"5F*
} z;F6:aBa
int a = temp[l]; 8=!BtMd"
int b = temp[r]; lJR
for (i = l, j = r, k = l; k <= r; k++) { T`?{Is['(
if (a < b) { V7pe|]%r
data[k] = temp[i++]; {~lVe GBp
a = temp; RdtF5#\z
} else { ;rK= jz^Q
data[k] = temp[j--]; UF$JVb
b = temp[j]; xKZLXQ'e-
} gFx2\QV
} ;YYo^9Lh}
} )uJu.foE
O`pqS\H
/** ,$xV&w8f\"
* @param data )T_o!/\*|*
* @param l Jh)x_&R&Q
* @param i e=yQFzQT)
*/ ?f{--|V
private void insertSort(int[] data, int start, int len) { , '_y@9?I
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Xc!0'P0T
} t[yu3U
} 7v8V0Gp
} !i`HjV0wS
} *nj={Ss&
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堆排序： 5ml#/kE
YaWZOuxm
package org.rut.util.algorithm.support; ST*\Q
#KOr-Yg|U
import org.rut.util.algorithm.SortUtil; LZ?z5U:
*G6Py,- !f
/** Vo@gxC,
* @author treeroot ^V1iOf:
* @since 2006-2-2 xlW`4\ Pa
* @version 1.0 @5im*ubzM
*/ 2^\67@9
public class HeapSort implements SortUtil.Sort{ ^)|!nd
]V4Fm{]
/* (non-Javadoc) p;P"mp\'
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,'KS:`m!
*/ ?c$z?QTMJ
public void sort(int[] data) { k/hD2tBLu
MaxHeap h=new MaxHeap(); de&*#O5
h.init(data); zOEdFU{x
for(int i=0;i h.remove(); R;6$lO8C&
System.arraycopy(h.queue,1,data,0,data.length); \m\E*c ):
} PqhR^re0.
%O=U|tuc$
private static class MaxHeap{ .o._`"V
h !yu. v
void init(int[] data){ lhN2xg5x
this.queue=new int[data.length+1]; {Y\W&Edw%
for(int i=0;i queue[++size]=data; H2plT
fixUp(size); =FB[<%
} l[_y|W5
} a&?SRC'x
`~0^fSww
private int size=0; X*Qtbm,
3\!DsPgW
private int[] queue; C'_^DPzj
V\!6K
public int get() { 323zR*\m
return queue[1]; cg]\R1Gm
} d&@>P&AT
hhqSfafUX
public void remove() { ,"@Tm01os
SortUtil.swap(queue,1,size--); R?/!7
fixDown(1); vZ rE9C }
} >E9:3&[F
file://fixdown xYgG
private void fixDown(int k) { "L(4 EcO@
int j; /F(wb_!
while ((j = k << 1) <= size) { JFJ_ PphvD
if (j < size %26amp;%26amp; queue[j] j++; z`?{5v -Qs
if (queue[k]>queue[j]) file://不用交换 sM4Qu./
break; {1<XOp#b
SortUtil.swap(queue,j,k); C0eqCu)Q
k = j; "<e<0::
} w6-A-M6hD
} B5nzkJV<X
private void fixUp(int k) { qG=>eRR
while (k > 1) { 9L"Z ~CUL
int j = k >> 1; wa#$9p~Q
if (queue[j]>queue[k]) fpDx)lQ
break; #]~l]Eq
SortUtil.swap(queue,j,k); gG 9e.++:
k = j; %X--`91|u
} 5Oa`1?C1
} NB["U"1[^E
M<AjtDF%
} tU5Z?QS
tR!!Q
} uA'S8b%C
:Z}d#Rbl
SortUtil： ]d}h`!:
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package org.rut.util.algorithm; $,/;QP}
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import org.rut.util.algorithm.support.BubbleSort; d~G, *
import org.rut.util.algorithm.support.HeapSort; D.Q9fa&P
import org.rut.util.algorithm.support.ImprovedMergeSort; !vaS fL*]
import org.rut.util.algorithm.support.ImprovedQuickSort; p}b:(QN~m
import org.rut.util.algorithm.support.InsertSort; 015 ;'V#we
import org.rut.util.algorithm.support.MergeSort; dTE(+M- Gr
import org.rut.util.algorithm.support.QuickSort; \o&\r)FX
import org.rut.util.algorithm.support.SelectionSort; c7E|GZ2Hc
import org.rut.util.algorithm.support.ShellSort; z ?3G`
P -O& X
/** Y]u6f c
* @author treeroot TL29{'4V
* @since 2006-2-2 +*O$]Hh
* @version 1.0 >nqDUGnEo>
*/ v>p UVM
public class SortUtil { U#u=9%'
public final static int INSERT = 1; 3?R56$-+
public final static int BUBBLE = 2; L,(H(GeX
public final static int SELECTION = 3; <wIz8V
public final static int SHELL = 4; x)wlp{rLf
public final static int QUICK = 5; 5-=&4R\k
public final static int IMPROVED_QUICK = 6; (}1:]D{)@V
public final static int MERGE = 7; :RxWHh3O
public final static int IMPROVED_MERGE = 8; i gyTvt!
public final static int HEAP = 9; r I-A)b4
\$g,Hgp/<
public static void sort(int[] data) { [SJ)4e|)
sort(data, IMPROVED_QUICK); i;CVgdQ8
} fP:n=A{
private static String[] name={ G$eA(GE
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" RS8tE(
}; q_hkI]
d*Wg>8|
private static Sort[] impl=new Sort[]{ EAdr}io
new InsertSort(), @hb K
new BubbleSort(), |8|_^`
new SelectionSort(), L"_l(<g
new ShellSort(), oy;g;dtq
new QuickSort(), rt_k }
new ImprovedQuickSort(), A;06Zrf1
new MergeSort(), b3zxiq x
new ImprovedMergeSort(), V5.=08L
new HeapSort() 2;v1YKY
}; cC NyW2'
k3 YDnMRA9
public static String toString(int algorithm){ <\9M+
return name[algorithm-1]; C:?mOM#_
} vFz#A/1
@`IMR$'
public static void sort(int[] data, int algorithm) { vC# *w,
impl[algorithm-1].sort(data); !"G|y4O
} gsSUmf1
6]Vf`i
public static interface Sort { &f;<[_QI=
public void sort(int[] data); GY%2EM(
} 9On0om>
_#SCjFz
public static void swap(int[] data, int i, int j) { dYEsSFB m
int temp = data; MnQ4,+ji-
data = data[j]; k|r+/gIV
data[j] = temp; fFSQLtm?E
} Z [aKic
} pZ IDGy=~