[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; |tz{Es<`B
} _X@ Q`d
int i1=l; 88 ca
int i2=mid+1; t{`-G*^
for(int cur=l;cur<=r;cur++){ BqdGU-Q
if(i1==mid+1) 9;rZ)QD
data[cur]=temp[i2++]; ;yCtk ~T%
else if(i2>r) 6zi Mf
data[cur]=temp[i1++]; Zu>CR_C
else if(temp[i1] data[cur]=temp[i1++]; XpA|<s
else &)|f|\yh"
data[cur]=temp[i2++]; lwo,D}
} B B^81{A
} :qV|rih_Q
>SS^qjh/
} A0Q1"b=
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改进后的归并排序: )}vUYTU1
tf1Y5P$
package org.rut.util.algorithm.support; 6UuM`eu
|uX&T`7?-
import org.rut.util.algorithm.SortUtil; }.=@^-JBA5
AJ6O>Euq
/** }:1qK67S
* @author treeroot I*mBU^<9V
* @since 2006-2-2 =/4}!B/
* @version 1.0 84s:cO
*/ 2P{! n#"
public class ImprovedMergeSort implements SortUtil.Sort { \lyHQ-gWhc
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private static final int THRESHOLD = 10; W9bpKmc
6)FM83zk)K
/* w;J#+ik
* (non-Javadoc) yA`,ns&n
* :K(+ KN(
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) f917F.1I
*/ k9c`[M
public void sort(int[] data) { Xob(4
int[] temp=new int[data.length]; D2io3Lo$ov
mergeSort(data,temp,0,data.length-1); }/g1
} G {a;s-OA3
Yi19VU|/
private void mergeSort(int[] data, int[] temp, int l, int r) { B0gs<E
int i, j, k; J`wx72/-ZW
int mid = (l + r) / 2; U]ZI_[\'U
if (l == r) \tdYTb.
return; ^Nysx ~6
if ((mid - l) >= THRESHOLD) "tj]mij2)G
mergeSort(data, temp, l, mid); [.;8GMW
else clM6R
insertSort(data, l, mid - l + 1); -&QpQ7q1
if ((r - mid) > THRESHOLD) NIC.c3
mergeSort(data, temp, mid + 1, r); 9Dyy&$s
else q@Zeu\T,*#
insertSort(data, mid + 1, r - mid); nzU0=w}V
59?$9}ob
for (i = l; i <= mid; i++) { HLh]*tQG
temp = data; lvUWs
} ESe$6)P
for (j = 1; j <= r - mid; j++) { KnK\X>:
temp[r - j + 1] = data[j + mid]; C4|79UG>s
} j"&Oa&SH
int a = temp[l]; ,ZnL38GW
int b = temp[r]; lnV!Xuf
for (i = l, j = r, k = l; k <= r; k++) { cQ0+kX<
if (a < b) { Tcq@Q$H
data[k] = temp[i++]; SWNT}{x]
a = temp; _G%kEt_4
} else { jLEO-<)-)
data[k] = temp[j--]; c2d1'l]n
b = temp[j]; nNRc@9Lt
} )xTu|V
} 5L\Im^
} @X_)%Y-^O
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/** 8=mx5Gwz-
* @param data Nm3CeU
* @param l \r&(l1R
* @param i 'tVe#oI
*/ Wa%p+(\<uB
private void insertSort(int[] data, int start, int len) { X C'|
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); <h`}I3Ao
} =z}M(<G
} T`Xz*\}Zb
} >~T2MlRux
} [kI[qByf
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堆排序： WX$AOnEv
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package org.rut.util.algorithm.support; hP jL
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import org.rut.util.algorithm.SortUtil; EsLtC5]
VJtRL')
/** <"LA70Hkk
* @author treeroot B> zQ[e@t
* @since 2006-2-2 kO,vHg$
* @version 1.0 <ol?9tm
*/ +^%0/0e
public class HeapSort implements SortUtil.Sort{ @$?*UI6y
F4g3l
/* (non-Javadoc) ~JOC8dO
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0|(6q=QK
*/ _No<fz8
public void sort(int[] data) { 0Rh*SoYrC
MaxHeap h=new MaxHeap(); z@xkE ,j>
h.init(data); u"kB`||(
for(int i=0;i h.remove(); s18A
System.arraycopy(h.queue,1,data,0,data.length); Ia>~ph#]{`
} [Y6ZcO/-i
gy/bA
private static class MaxHeap{ IZZ $p{
~|`jIqU
void init(int[] data){ G\*`%B_ n
this.queue=new int[data.length+1]; A)nE+ec1
for(int i=0;i queue[++size]=data; n5?7iU&JIo
fixUp(size); ymA8`k5>@
} `(@{t:L
} ABhQ7 x|
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private int size=0; z-`4DlJUS
IVG77+O# }
private int[] queue; /ASpAl[J
A*? Qm
public int get() { zB+zw\ncN
return queue[1]; @G=_nZxv
} YU1z\pK
f7 zGz
public void remove() { aOW$H:b
SortUtil.swap(queue,1,size--); 5K$d4KT
fixDown(1); +kOXa^K
} _;G|3>5u
file://fixdown e]smnf
private void fixDown(int k) { ;vgaFc]
int j; \B8[UZA.&
while ((j = k << 1) <= size) { 2!}rHw
if (j < size %26amp;%26amp; queue[j] j++; .IORvP-M&
if (queue[k]>queue[j]) file://不用交换 X1%_a.=VF
break; eo4v[V&
SortUtil.swap(queue,j,k); p4lB#
k = j; +InFv"wt
} 4J2C#Cs
} Oa7jLz'i
private void fixUp(int k) { uq@_DPA7
while (k > 1) { 4-q8:5
int j = k >> 1; _MUSXB'
if (queue[j]>queue[k]) 2;YL+v2
break; E)(Rhvij
SortUtil.swap(queue,j,k); ,}$[;$ye
k = j; +K"d\<
} U p: M[S
} 3F9AnS
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} B%KfB VC
w'P!<JaZ
} h7>`:~
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SortUtil： `HsI)RmX
f.Ms3))
package org.rut.util.algorithm; I>spJ5ls
)dI `yf
import org.rut.util.algorithm.support.BubbleSort; Y/G~P,9
import org.rut.util.algorithm.support.HeapSort; n7'X.=o7
import org.rut.util.algorithm.support.ImprovedMergeSort; Na_O:\x#
import org.rut.util.algorithm.support.ImprovedQuickSort; ^9oJuT!tu
import org.rut.util.algorithm.support.InsertSort; GP=&S|hi
import org.rut.util.algorithm.support.MergeSort; "A&HNkRz
import org.rut.util.algorithm.support.QuickSort; 6zW3!_tz
import org.rut.util.algorithm.support.SelectionSort; k!sk\~>YO
import org.rut.util.algorithm.support.ShellSort; t x#(K#/
wRj&k(?*
/** v,,Dz8!Ty
* @author treeroot Y kcN-
* @since 2006-2-2 =BBDh`$R
* @version 1.0 8=j_~&*
*/ |kkg1M#
public class SortUtil { A$o?_
public final static int INSERT = 1; &13#/
public final static int BUBBLE = 2; 1WLaJ%Fv
public final static int SELECTION = 3; :%"$8o*0W
public final static int SHELL = 4; psE&Rx3)
public final static int QUICK = 5; !"N-To-c
public final static int IMPROVED_QUICK = 6; UWq[K&vQZ
public final static int MERGE = 7; T&kr IZw
public final static int IMPROVED_MERGE = 8; R]Pv=fn
public final static int HEAP = 9; M`.v/UQn
{~eVZVv
public static void sort(int[] data) { %n>*jFC
sort(data, IMPROVED_QUICK); L2^M#G@t
} i 9wk)
private static String[] name={ (Zv/(SE5%
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" w;KNS'
}; m}?(c)ST
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private static Sort[] impl=new Sort[]{ hZLwg7X!
new InsertSort(), ;Fm7!@u^0
new BubbleSort(), WY" `wM
new SelectionSort(), H6]z98
new ShellSort(), wdTjJfr
new QuickSort(), Ce_ES.
new ImprovedQuickSort(), $${9 %qPzb
new MergeSort(), D$G:#z*
new ImprovedMergeSort(), \*6Ld%:h$
new HeapSort() :sXn*k4v
}; W\JwEb9Y
B]5G"4,
public static String toString(int algorithm){ 4Rev7Mc
return name[algorithm-1]; h;2n2.Q
} A>W8^|l6+-
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public static void sort(int[] data, int algorithm) { rP7f~"L
impl[algorithm-1].sort(data); @b"J FB|
} %oqC5O6
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public static interface Sort { AH#klYK
public void sort(int[] data); w-9fskd6e
} ([L5i&DT
0'4V*Y
public static void swap(int[] data, int i, int j) { fI1,L"
int temp = data; @`Foy
data = data[j]; ]-G10p}Ph-
data[j] = temp; !L_\6;aP,x
} LHJjPf)F
} ?:XbZ"25pJ