[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; wqo:gW_
} 2|;|C8C
int i1=l; ZPZh6^cc
int i2=mid+1; os5$(
for(int cur=l;cur<=r;cur++){ Vg'R=+Wb
if(i1==mid+1) &Ym):pc
data[cur]=temp[i2++]; <IR#W$[
else if(i2>r) e(7#>O%1
data[cur]=temp[i1++]; u+V*U5v
else if(temp[i1] data[cur]=temp[i1++]; *X.1b!
else 2u$-(JfoS
data[cur]=temp[i2++]; ,)`_?^\$f
} %}@iz(*}>
} vh\i ^
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} `O6#-<>
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改进后的归并排序: s!(R
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package org.rut.util.algorithm.support; 2Wzx1_D"a
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import org.rut.util.algorithm.SortUtil; >W>rhxU
}r,M(Zr
/** h:fiUCw
* @author treeroot vx9!KWy}
* @since 2006-2-2 4AJ]qu
* @version 1.0 JX0M3|I=
*/ ox&5}&\
public class ImprovedMergeSort implements SortUtil.Sort { 3%*igpj\)
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private static final int THRESHOLD = 10; 5Od%Jhtt
jt}Re,
/* 7.29'
* (non-Javadoc) 7wj2-BWa
* 4vg3F(
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :$D*ab^^P
*/ ehW[LRtq
public void sort(int[] data) { qcs) p
int[] temp=new int[data.length]; _UVpQ5pN
mergeSort(data,temp,0,data.length-1); ob>)F^.iS
} ins(RWO
Wx0i_HFR
private void mergeSort(int[] data, int[] temp, int l, int r) { &%fcGNzJQ
int i, j, k; V,KIi_Z
int mid = (l + r) / 2; llZU: bs
if (l == r) {($bzT7c
return; {L;sF=d
if ((mid - l) >= THRESHOLD) ;VLDXvGd
mergeSort(data, temp, l, mid); ^/#+0/Bn
else G`l\R:Q
insertSort(data, l, mid - l + 1); Lip#uuuXXN
if ((r - mid) > THRESHOLD) O_;BZzT
mergeSort(data, temp, mid + 1, r); *}vvS^c0
else o"JHB
insertSort(data, mid + 1, r - mid); 65aYH4"
oEX,\@+u
for (i = l; i <= mid; i++) { \kQ)fk]^
temp = data; ]~;*9`:
} LtB5;ByeQ0
for (j = 1; j <= r - mid; j++) { k^}[+IFJ
temp[r - j + 1] = data[j + mid]; -f|/#1
} SNqSp.>-U"
int a = temp[l]; 1NP
int b = temp[r]; _\>y[e["p
for (i = l, j = r, k = l; k <= r; k++) { 2mEqfy
if (a < b) { C@Wzg
data[k] = temp[i++]; I7vP*YE 7F
a = temp; 5.^pD9[mT
} else { ;"&?Okz
data[k] = temp[j--]; %<kfW&_>w
b = temp[j]; {jD?obs
} |it*w\+M
} >Cr"q*
} q]{gAGe~
<~mqb=qA$
/** @_`r*Tb)dM
* @param data "[ LUv5
* @param l g/C 7wc
* @param i |&@q$d
*/ \>S.nW
private void insertSort(int[] data, int start, int len) { PSc=k0D
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); }#1.$a
} Z`*V9
} $+PioSq
} XtO..{qU
} ftY&Q#[
#)S}z+I
堆排序： b]]k\b
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package org.rut.util.algorithm.support; Kvg=7o
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import org.rut.util.algorithm.SortUtil; ?`TJ0("z"
&m5^ YN$b
/** L@\t] ~
* @author treeroot W,~*pyLdO
* @since 2006-2-2 W^elzN(
* @version 1.0 D&m1yl@\J
*/ dFg&|Lp
public class HeapSort implements SortUtil.Sort{ {b-C,J
E{6ku=2F
/* (non-Javadoc) q5g_5^csM{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) HZ<#H3_ix
*/ il>+jVr
public void sort(int[] data) { }F1Asn
MaxHeap h=new MaxHeap(); _A]jiPq
h.init(data); *?Eu{J){7%
for(int i=0;i h.remove(); ]yKwH 9sl
System.arraycopy(h.queue,1,data,0,data.length); Y#lAG@$
} X)SUFhP\
pW ~;B*hF
private static class MaxHeap{ 87[o^)8
w'}s'gGE
void init(int[] data){ TJNE2
this.queue=new int[data.length+1]; "|i1AR:I
for(int i=0;i queue[++size]=data; 5S? "<+J'
fixUp(size); UP-2{zb |?
} 9>+>s ?IgK
} nxN("$'cq
pjO
private int size=0; K/(LF}
=O8YU)#
private int[] queue; #~j$J
QqL?? p-S>
public int get() { ~oOv/1v},
return queue[1]; 2h5T$[fV
} (a!E3y5,
e~QLzZ3
public void remove() { j 1'H|4
SortUtil.swap(queue,1,size--); NHZMH!=4:n
fixDown(1); crd|r."
} yYOV:3!"
file://fixdown 6AD&%v
private void fixDown(int k) { VFV8ik)
int j; w8o?wx*
while ((j = k << 1) <= size) { -C^qN7Bz
if (j < size %26amp;%26amp; queue[j] j++; .~'q yD2V
if (queue[k]>queue[j]) file://不用交换 Ge$&k
break; Q3lVx5G>4
SortUtil.swap(queue,j,k); >ptI!\i}
k = j; Q m9b:U~
} xG~-.
} DvEII'-h
private void fixUp(int k) { Wm8BhO
while (k > 1) { 3sBWtz
int j = k >> 1; hW,GsJ,
if (queue[j]>queue[k]) ~l+~MB
break; ;F_&h#D]3
SortUtil.swap(queue,j,k); ,_,7cor
k = j; p38s&\-kEN
} J!rZskd
} Rpcnpo
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} y^p%/p%
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} VyU!r* o
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SortUtil： b(ryk./ogx
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package org.rut.util.algorithm; /C<} :R
jP@t!=
import org.rut.util.algorithm.support.BubbleSort; Rx<[bohio
import org.rut.util.algorithm.support.HeapSort; $AFiPH9
import org.rut.util.algorithm.support.ImprovedMergeSort; e ]>{?Z
import org.rut.util.algorithm.support.ImprovedQuickSort; u*;53 43
import org.rut.util.algorithm.support.InsertSort; *7Sg8\wDn
import org.rut.util.algorithm.support.MergeSort; gp'n'K]
import org.rut.util.algorithm.support.QuickSort; gvZLW!={
import org.rut.util.algorithm.support.SelectionSort; I@a7!ugU65
import org.rut.util.algorithm.support.ShellSort; XeBSHvO_
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/** A[d'*n[
* @author treeroot ] )x z
* @since 2006-2-2 Iq": U
* @version 1.0 S67T:ARS
*/ FHH2
public class SortUtil { = &aD!nTx
public final static int INSERT = 1; 6ud<B
public final static int BUBBLE = 2; EVmE{XlD;
public final static int SELECTION = 3; `V ++})5v
public final static int SHELL = 4; q14A'XW
public final static int QUICK = 5; UE\@7
public final static int IMPROVED_QUICK = 6; ]*;+ U6/?
public final static int MERGE = 7; "=!QSb
public final static int IMPROVED_MERGE = 8; w1A&p
public final static int HEAP = 9; TAYt:
1[`l`Truz
public static void sort(int[] data) { nBiA=+'v
sort(data, IMPROVED_QUICK); s.dn~|a
} d0Kg,HB
private static String[] name={ a( {`<F
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" &<i>)Ss
}; U7fE6&g
/C8(cVNZ
private static Sort[] impl=new Sort[]{ W%Zyt:H`
new InsertSort(), Zk;;~ESOU
new BubbleSort(), kk5i{.?[
new SelectionSort(), XKU=VOY
new ShellSort(), lR^dT4
new QuickSort(), z8"=W,2
new ImprovedQuickSort(), Ez1*}
new MergeSort(), <u($!ATb
new ImprovedMergeSort(), 9'8oOBqm3%
new HeapSort() E.% F/mM
}; 1aMBCh<}JN
$v oyXi`*
public static String toString(int algorithm){ +#H8d1^5
return name[algorithm-1]; w)8@Tu:Q
} +ow ^xiD
~ pdf'
public static void sort(int[] data, int algorithm) { mg,f>(
impl[algorithm-1].sort(data); .y2<2eW
} }>XSp)"{l
(&hX8
public static interface Sort { <,hBoHZSL
public void sort(int[] data); ze\~-0ks+
} IKr7"`
!<6wrOMaO
public static void swap(int[] data, int i, int j) { +m7x>ie)
int temp = data; 6$dm-BI
data = data[j]; =<_5gR
data[j] = temp; 1k%ko?
} Yh%wf3 UEO
} Tk2kis(n