[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; uQ}kq7gd
} "lm3o(Dk
int i1=l; (<t)5?@%
int i2=mid+1; f#?R!pR
for(int cur=l;cur<=r;cur++){ <cS1}"
if(i1==mid+1) pE#0949
data[cur]=temp[i2++]; & |r)pl0$
else if(i2>r) -3C~}~$>`
data[cur]=temp[i1++]; I[/u5V_b'
else if(temp[i1] data[cur]=temp[i1++]; H Zc;.jJ
else W#$rC<Jh]
data[cur]=temp[i2++]; ?:,j9:m?
} "Y6f.rB
} ;iWCV&>w
W NCdk$
} xE:p)B-]
;)*Drk*t,
改进后的归并排序: ?V+=uTCq
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package org.rut.util.algorithm.support; cVU[>gkg_
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import org.rut.util.algorithm.SortUtil; d] {^
X#fI$9a
/** 2gi`^%#k]
* @author treeroot FTn[$q
* @since 2006-2-2 t_3XqjuA
* @version 1.0 5,A/6b
*/ "{}5uth
public class ImprovedMergeSort implements SortUtil.Sort { 1*s Lj#
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private static final int THRESHOLD = 10; gC?k6)p$N
-Rmz`yOq}
/* 9tJiIr8i
* (non-Javadoc) 3OTSLF/
* fz%urbJR
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) -LF^u;s8&S
*/ W,vb7v'
public void sort(int[] data) { Gg/K
int[] temp=new int[data.length]; $?7}4u,
mergeSort(data,temp,0,data.length-1); aX~7NslR
} [b`k\~N4r
\ /o`CV{O
private void mergeSort(int[] data, int[] temp, int l, int r) { jl@xcs]#
int i, j, k; =2< >dM#`
int mid = (l + r) / 2; N=(rl#<
if (l == r) ibh!8"[
return; hD"Tjd` P
if ((mid - l) >= THRESHOLD) yB&s2J
mergeSort(data, temp, l, mid); N[Fz6,ZG _
else R/iXO~/"J
insertSort(data, l, mid - l + 1); jGId)f!)
if ((r - mid) > THRESHOLD) YS&3+Tp
mergeSort(data, temp, mid + 1, r); Q\}5q3
else 7JjTm^bu
insertSort(data, mid + 1, r - mid); wj5{f5 RWV
!-[e$?-
for (i = l; i <= mid; i++) { (2X`imJ
temp = data; 'z@(,5
} `uY77co6
for (j = 1; j <= r - mid; j++) { -(P"+g3T
temp[r - j + 1] = data[j + mid]; ZPHB$]ri
} 7D<M\l8G
int a = temp[l]; *?cE]U6;
int b = temp[r]; N|wI=To
for (i = l, j = r, k = l; k <= r; k++) { 7aS`SF
if (a < b) { (wkeo{lx
data[k] = temp[i++]; @#;2P'KL
a = temp; "??$yMW
} else { a=Pl3Uo
data[k] = temp[j--]; S U04q+
b = temp[j]; w(0's'
} w\!aKeP'
} +TL5yuA
} z^bv)u
Z)?B5FF
/** mGb,oj7l
* @param data M, f6UYo=
* @param l U,\3 !D0jt
* @param i WZ> }
*/ R^4JM,v9x`
private void insertSort(int[] data, int start, int len) { iLD}>=
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Tc$Jvy-G4A
} X|++K;rtfE
} :+06M@
} K 0R<a~
} 7b7@"Zw*
(hr*.NS#
堆排序： 7,X5]U&A<x
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package org.rut.util.algorithm.support; WKek^TW4HE
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import org.rut.util.algorithm.SortUtil; RDGefxv
CEzwI _
/** vr/*z euA
* @author treeroot F/}(FG<'>I
* @since 2006-2-2 Q*&k6A"jx
* @version 1.0 &V"9[0
*/ f-$%Ck$%,
public class HeapSort implements SortUtil.Sort{ VEFUj&t;xW
<u`m4w
/* (non-Javadoc) U~H]w,^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @~1}n/
*/ Qx<86aKkF
public void sort(int[] data) { =zBc@VTp
MaxHeap h=new MaxHeap(); ;l4epN
h.init(data); HFlMx
for(int i=0;i h.remove(); B bP&-c
System.arraycopy(h.queue,1,data,0,data.length); x:dI:G
} qGivRDR$
-aSj-
private static class MaxHeap{ AXN%b2
ZE393FnE
void init(int[] data){ s&.VU|=VQ@
this.queue=new int[data.length+1]; #u]'3en
for(int i=0;i queue[++size]=data; E)ne z
fixUp(size); S1SsJo2\
} 3IB||oN$T
} (58}G2}q
W[BwHNxyg
private int size=0; {@E(p4W
hsCts@R
private int[] queue; &-R(u}m-F
LKX; ^
public int get() { 7^bde<0
return queue[1]; fC|NK+Xd`
} lE|Hp
crvq]J5
public void remove() { $*-UY
SortUtil.swap(queue,1,size--); ,2>nr goM
fixDown(1); <36z,[,kZ@
} E=3UaYr
file://fixdown HuB\92u
private void fixDown(int k) { N Ftmus
int j; jVdRy{MH
while ((j = k << 1) <= size) { Rlyx&C8
if (j < size %26amp;%26amp; queue[j] j++; ))9w)A@
if (queue[k]>queue[j]) file://不用交换 5yl[#>qt
break; 8slOB>2#Y
SortUtil.swap(queue,j,k); `2I<V7SF$
k = j; -5X*y4#
} a Byetc88/
} ,RXfJh
private void fixUp(int k) { | > t,1T.
while (k > 1) { L;%_r)
int j = k >> 1; SW; %2
if (queue[j]>queue[k]) $v \@mW*R
break; nm}wdel"
SortUtil.swap(queue,j,k); %D_pTD\
k = j; g#}a?kTM@
} KB@F^&L {
} I7C*P~32{n
:i};]pR
} %pd-{KR
Gm1[PAj
} HAca'!p
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SortUtil： I&Dp~aEM]
FBk_LEcX
package org.rut.util.algorithm; oU[>.Igi
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import org.rut.util.algorithm.support.BubbleSort; ]IQ`.:g=9
import org.rut.util.algorithm.support.HeapSort; _*1{fvv0{
import org.rut.util.algorithm.support.ImprovedMergeSort; iD"9,1@~n
import org.rut.util.algorithm.support.ImprovedQuickSort; 9vL n#_
import org.rut.util.algorithm.support.InsertSort; :=cZ,?PQp1
import org.rut.util.algorithm.support.MergeSort; MpCK/eiC
import org.rut.util.algorithm.support.QuickSort; 3@*orm>em
import org.rut.util.algorithm.support.SelectionSort; bd& /B&a
import org.rut.util.algorithm.support.ShellSort; u|eV'-R)s
>3SZD
/** -:]-g:;/
* @author treeroot xp68-&
* @since 2006-2-2 ~u^MRe|`
* @version 1.0 %j4AX
*/ ^6kE tTO*
public class SortUtil { B{6wf)[O
public final static int INSERT = 1; ^$VH~i&
public final static int BUBBLE = 2; -qW[.B
public final static int SELECTION = 3; b,r{wrLe)
public final static int SHELL = 4; 8x/]H(J
public final static int QUICK = 5; fC<pCdsg
public final static int IMPROVED_QUICK = 6; ?BA~$|lfxu
public final static int MERGE = 7; 9o<5Z=
public final static int IMPROVED_MERGE = 8; JIH6!
public final static int HEAP = 9; L!l`2[F|
='z4bU
public static void sort(int[] data) { vlSSw+r9
sort(data, IMPROVED_QUICK); Op>l~{{{
} F15Yn
private static String[] name={ 1Vi3/JM@
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" %Ix
}; 6aq=h`Y
1Ax{Y#<
private static Sort[] impl=new Sort[]{ E,wOWs*
new InsertSort(), >\s8S}p
new BubbleSort(), 7AouiL 2-W
new SelectionSort(), P7D__hoE
new ShellSort(), fnZ?YzLI
new QuickSort(), 8{)j"rghah
new ImprovedQuickSort(), >Y8\I
new MergeSort(), X :wfmb
new ImprovedMergeSort(), X Z4q{^o
new HeapSort() `SM37({c
}; 3-6Lbe9H
`~;`q
public static String toString(int algorithm){ nd3n'b
return name[algorithm-1]; zNRR('B?
} (Ee5Af,4
(Rs052m1
public static void sort(int[] data, int algorithm) { \iQ{Q&JR:
impl[algorithm-1].sort(data); J]4pPDm
} 3z~d7J
T6^H%;G
public static interface Sort { /O{iL:`
public void sort(int[] data); dK d"2+fH
} mnm7{?#[
W"[Q=$2<<
public static void swap(int[] data, int i, int j) { SDHJX8Hq
int temp = data; 3Q:HzqG
data = data[j]; ,We'AR3X
data[j] = temp; D\0qlCAs
} 'MK"*W8QRM
} 1G`zwfmh~