[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; #)s +I2
} iLNO}EUL
int i1=l; 8! /ue.T
int i2=mid+1; {\X$vaF
for(int cur=l;cur<=r;cur++){ TN<"X :x9
if(i1==mid+1) ^!$=(jh.
data[cur]=temp[i2++]; k"E|E";B
else if(i2>r) _Td#C1g3
data[cur]=temp[i1++]; pcQgWjfS
else if(temp[i1] data[cur]=temp[i1++]; ?Zb3M
else qcge#S>
data[cur]=temp[i2++]; >8&fFq
} *VUJ);7k
} JW"`i
}GHCu
} /J9Or{#r
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改进后的归并排序: X{:3UTBR
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package org.rut.util.algorithm.support; ;zd.KaS
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import org.rut.util.algorithm.SortUtil; OTNI@jQ)
_Ud!tK*H
/** nZM]EWn
* @author treeroot u95D0S
* @since 2006-2-2 A\v53AT
* @version 1.0 "~KTLf
*/ >_$_fB
public class ImprovedMergeSort implements SortUtil.Sort { I9xkqj
?!.J0q
private static final int THRESHOLD = 10; bdEIvf7
,$U~<Zd
/* Cxe(iwa.
* (non-Javadoc) 1$^r@rP
* iiWpmE<,
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) SiJ{
*/ 6PC?*^v
public void sort(int[] data) { wOLV?Vk
int[] temp=new int[data.length]; ca5;Z@t$S
mergeSort(data,temp,0,data.length-1); x:h)\%Dg<
} )`6OSB
$GHi9aj_P
private void mergeSort(int[] data, int[] temp, int l, int r) { dp4vybJ
int i, j, k; /%)(Uz
int mid = (l + r) / 2; ?}= $zN
if (l == r) ~_IQ:]k
return; 1=e(g#Ajn\
if ((mid - l) >= THRESHOLD) lXEnm-_
mergeSort(data, temp, l, mid); ;|W:,a{kS
else b|iIdDK
insertSort(data, l, mid - l + 1); Sr_hD5!
if ((r - mid) > THRESHOLD) F{_,IQ]U
mergeSort(data, temp, mid + 1, r); 0g; o6Fg
else I!Mkss xc
insertSort(data, mid + 1, r - mid); 4N= gl(
cob??|,\m
for (i = l; i <= mid; i++) { NiQ Y3Nj
temp = data; [ $"
} #K iqV6E
for (j = 1; j <= r - mid; j++) { K@Xj)
temp[r - j + 1] = data[j + mid]; lkC|g%f
} )*Wz5x
int a = temp[l]; LI^D\
int b = temp[r]; 2fNNdxdbT
for (i = l, j = r, k = l; k <= r; k++) { HrMbp
if (a < b) { S~&9DQNj
data[k] = temp[i++]; 8iM:ok
a = temp; =kCiJ8q|
} else { `cIeqp
data[k] = temp[j--]; ooP{Q r
b = temp[j]; o 9(x\g
} j8]M}Q$
} P>$+XrTE
} Om_ "X6
|;^$IZSsz
/** lR mVeq:
* @param data [nlq(DGJhp
* @param l K<%8.mZ7
* @param i p["pGsf
*/ TtQd#mSI\
private void insertSort(int[] data, int start, int len) { a^ys7UV
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); l.Z+.<@
} nZG zez
} k_?~@G[I
} `tcX[(`
} ^NM>xIenf
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堆排序： B~J63Os/
@;KvUR/+FE
package org.rut.util.algorithm.support; JbMp /
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import org.rut.util.algorithm.SortUtil; 9[DlJ@T}
ePxAZg$ `>
/** *)oBE{6D
* @author treeroot `B,R+==G:
* @since 2006-2-2 >6IUle>z
* @version 1.0 51*[Ibx
*/ t2|0no
public class HeapSort implements SortUtil.Sort{ /gex0w
O7yj<
/* (non-Javadoc) r=p^~tuyxr
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) WP=uHg
*/ Xg\unUHa
public void sort(int[] data) { <7zz"R
MaxHeap h=new MaxHeap(); %b~ND?nn-
h.init(data); /zr)9LQY0
for(int i=0;i h.remove(); _a_T`fE&de
System.arraycopy(h.queue,1,data,0,data.length); ;ZMIYFXRqh
} fZ^ad1o
~y whl'"k
private static class MaxHeap{ ] ;HCt=I~
^t$uDQ[hA
void init(int[] data){ ;Cjj_9e,:
this.queue=new int[data.length+1]; dxH.
for(int i=0;i queue[++size]=data; y(E<MRd8V
fixUp(size); -Rr !J37
} V 'fri/Z
} 8Z)wot
?crK613 t
private int size=0; bfpoX,:
':DL
private int[] queue; F(^#_tXP
9E4^hkD&
public int get() { a4Z e!l(
return queue[1]; G]mD_J1$
} ULs'oT)K;
2OqEyXh
public void remove() { |$+/IxDP
SortUtil.swap(queue,1,size--); @=Dc(5`[
fixDown(1); ?ef7%0
} yf-2E_yB
file://fixdown h`(VMf'#
private void fixDown(int k) { s0Z)BR #
int j; P:%b[7
while ((j = k << 1) <= size) { 'MNCJ;A@V
if (j < size %26amp;%26amp; queue[j] j++; &5G@YQD1e
if (queue[k]>queue[j]) file://不用交换 "D KrQ,L
break; Md8<IFi9]Q
SortUtil.swap(queue,j,k); P8;1,?ou
k = j; A]drNFE
} QXO~DR1
} T[c-E*{hR
private void fixUp(int k) { Y^;izM}
while (k > 1) { )HvBceN
int j = k >> 1; +Hp`(^(
if (queue[j]>queue[k]) ;E>#qYC6
break; LB9W.cA
SortUtil.swap(queue,j,k); T21?~jS
k = j; 1TF S2R n
} I[w5V;>*
} ![J_6f}!
~k}O"{ y
} SUW=-M
x3.,zfWs
} j*;.>akY7
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SortUtil： TmM~uc7mj
%az6\"n
package org.rut.util.algorithm; G)_Zls2;
?IoA;GBg
import org.rut.util.algorithm.support.BubbleSort; mZuLwd$0
import org.rut.util.algorithm.support.HeapSort; ,WM-%2z^4I
import org.rut.util.algorithm.support.ImprovedMergeSort; j |o&T41
import org.rut.util.algorithm.support.ImprovedQuickSort; #\ysn|!J,
import org.rut.util.algorithm.support.InsertSort; _+~&t9A!
import org.rut.util.algorithm.support.MergeSort; >hV2p/D
import org.rut.util.algorithm.support.QuickSort; VWzuV&;P
import org.rut.util.algorithm.support.SelectionSort; b):aqRwP
import org.rut.util.algorithm.support.ShellSort; qZv@ULluc
Kltqe5
/** Wt=@6w&
* @author treeroot wjgFe]
* @since 2006-2-2 \'iy(8i
* @version 1.0 ]!a?Lr
*/ L=M'QJl9
public class SortUtil { U;"J8
public final static int INSERT = 1; C?'s
public final static int BUBBLE = 2; ]^i^L
public final static int SELECTION = 3; ]9JH.fF
public final static int SHELL = 4; E\cX
public final static int QUICK = 5; 6o5,d]
public final static int IMPROVED_QUICK = 6; |Q";a:&$
public final static int MERGE = 7; ,e'"SVQc
public final static int IMPROVED_MERGE = 8; Np+pJc1
public final static int HEAP = 9; uY/CiTWr
{zLgLBM
public static void sort(int[] data) { ^!n|j]aw
sort(data, IMPROVED_QUICK); ?[Ma" l>
} 6:`[Fi
private static String[] name={ &2O~BIRE
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" >m{>0k(^`
}; [nrD4
'iDkAmvD
private static Sort[] impl=new Sort[]{ U\-.u3/
new InsertSort(), z^WY5~?
new BubbleSort(), >&F:/
new SelectionSort(), ?C
new ShellSort(), ?I"?J/zm
new QuickSort(), Mm9*$g!R
new ImprovedQuickSort(), +4rd N\.
new MergeSort(), m| 7v76(
new ImprovedMergeSort(), oJ/=&c
new HeapSort() sBqOcy
}; VwK7\jV
Ai5+ ;8z+
public static String toString(int algorithm){ 9>`dB
return name[algorithm-1]; h'_$I4e)
} aVr=7PeF
BqA_CW
public static void sort(int[] data, int algorithm) { |oe
impl[algorithm-1].sort(data); <E^;RG
} wx!2/I>
wrK@1F9!
public static interface Sort { lIO#)>
public void sort(int[] data); 5j9%W18
} o=xMaA
0<fQjXn
public static void swap(int[] data, int i, int j) { BlcsDB =ka
int temp = data; YIb7y1\UM
data = data[j]; 'm-5
data[j] = temp; Z5EII[=$o
} ^gR~~t;@
} ;lhW6;oI'