[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; 5&U?\YNLa
} $>l65)(E\
int i1=l; l=&Va+K
int i2=mid+1; 1NlpOVq:)
for(int cur=l;cur<=r;cur++){ ^''3}<Ep
if(i1==mid+1) 60p*4>^v
data[cur]=temp[i2++]; c30kb
else if(i2>r) *zPz)3;
data[cur]=temp[i1++]; t+WUz#i"
else if(temp[i1] data[cur]=temp[i1++]; 5@Xy) z
else [ 3SbWwg
data[cur]=temp[i2++]; Kv\uBMJNW
} P<xCg
} Wf$P+i*
,n{|d33
} _3Q8R}
A}03s6^i;
改进后的归并排序: .TRp74
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package org.rut.util.algorithm.support; 0_map z
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import org.rut.util.algorithm.SortUtil; ?)c9!hR
M*jn8OE
/** 1QuR7p
* @author treeroot !='&#@7u
* @since 2006-2-2 XM*%n8q7#N
* @version 1.0 ?[Qxq34
*/ RZKczZGZg
public class ImprovedMergeSort implements SortUtil.Sort { L)Ru]X`
|f&=9%
private static final int THRESHOLD = 10; &uTK@ G+
`OyYo^+D|.
/* Rwz (20n\^
* (non-Javadoc) ApAHa]Ccp
* (=i+{ 3`|
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) DKf:0E8
*/ _Nq7_iT0
public void sort(int[] data) { >_?Waz%
int[] temp=new int[data.length]; <~!R|5sK
mergeSort(data,temp,0,data.length-1); !Ry4w|w
} *[['X%f
2SVJKX_V+
private void mergeSort(int[] data, int[] temp, int l, int r) { z2A1h!Me
int i, j, k; 7(= 09z
int mid = (l + r) / 2; K~>ESMZ5
if (l == r) 3/((7O[
return; < G:G/
if ((mid - l) >= THRESHOLD) ob.=QQQs
mergeSort(data, temp, l, mid); {5gh.
else -r"h[UV)
insertSort(data, l, mid - l + 1); iYxpIqWw
if ((r - mid) > THRESHOLD) 8(A+"H(
mergeSort(data, temp, mid + 1, r); gkDlh{
else _"%-=^_
insertSort(data, mid + 1, r - mid); `~3y[j]kO
js\|xfDxP
for (i = l; i <= mid; i++) { ~~'UQnUN4
temp = data; )[hQK_e]
} .q7o7J%
for (j = 1; j <= r - mid; j++) { ;7Y4v`m
temp[r - j + 1] = data[j + mid]; VpkkiN
} y\"Kur*O
int a = temp[l]; G+xdh
int b = temp[r]; )`.'QW
for (i = l, j = r, k = l; k <= r; k++) { qBIKJ
if (a < b) { eyGY8fF8$
data[k] = temp[i++]; ]p2M!N,?
a = temp; ,] ,dOIOwn
} else { 9W<I~
data[k] = temp[j--]; >w"k:O17
b = temp[j]; CwVORf,uA
} ^8yhx-mgb
} wtw
} S>pbplE
=9JKg4I6
/** 5 J9,/M0
* @param data )9QeVf
* @param l k9<P]%
* @param i ]2P*Z6Az
*/ L.@o
private void insertSort(int[] data, int start, int len) { .-g++f(_i
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); KDX34Fr1
} \{ui{8+G
} nZ 0rxx[V?
} U&\8~h
} <X_I`
3o=K?eOdg
堆排序： pkL&j<{
>)3[CU,
package org.rut.util.algorithm.support; ,1+)qv#|i
$fwv'
import org.rut.util.algorithm.SortUtil; @dzO{)
AI&Bv
/** T~rPpi&
* @author treeroot C&vUZa[p
* @since 2006-2-2 Q,mmHw.`J
* @version 1.0 q^_PR|
*/ 3i'L5f67
public class HeapSort implements SortUtil.Sort{ Xn'{g
}qf)L.
/* (non-Javadoc) .*s1d)\:
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) dt(#|8i%
*/ Rx22W:S=C.
public void sort(int[] data) { ,wN>,(
MaxHeap h=new MaxHeap(); [y}0X^9,E
h.init(data); Ty21-0F
for(int i=0;i h.remove(); =;9*gDfD
System.arraycopy(h.queue,1,data,0,data.length); yqm^4)Dp
} <I{)p;u1
aD1G\*AFJ
private static class MaxHeap{ M@V.?;F},
E K)7g~
void init(int[] data){ VE<&0d<
this.queue=new int[data.length+1]; m\88Etl@
for(int i=0;i queue[++size]=data; o#-K,|-
fixUp(size); /^kZ}}9baU
} .'q0*Pe
} J<<0U;
<= xmJx-V
private int size=0; +|N!(H
,[lS)`G
private int[] queue; ix<sorR H
k#I4^
public int get() { hDp -,ag{
return queue[1]; JwNG`MGc
} K>2mm!{
yE(>R(^
public void remove() { a+TlZE>8
SortUtil.swap(queue,1,size--); pFLR!/J
fixDown(1); 9~^%v zM
} `43`*=
file://fixdown 8Q&hhmOnz
private void fixDown(int k) { wr/Z)e =^3
int j; ][|)qQ%V
while ((j = k << 1) <= size) { meHAa`
if (j < size %26amp;%26amp; queue[j] j++; ]E1aIt
if (queue[k]>queue[j]) file://不用交换 Qo!/]\
break; ckXJ9>
SortUtil.swap(queue,j,k); ik@g;>pQD
k = j; MVW2%6
} 7T]}<aK<c[
} dsKEWZ =
private void fixUp(int k) { 3McBTa!
while (k > 1) { ZqHh$QBD 9
int j = k >> 1; .D^=vuxt~
if (queue[j]>queue[k]) ,!BiB*
break; +)C?v&N
SortUtil.swap(queue,j,k); <n iq*
k = j; 5G@z l
} M+X>!Os
} `c^ _5:euX
$d4^e&s
} uP\?y(="
}b-"[TDEF
} FqOV/B /z2
Y|t]bb
SortUtil： bJJB*$jW=
m L#-U)?F
package org.rut.util.algorithm; !@9Vq6
d&:ABI
import org.rut.util.algorithm.support.BubbleSort; fZ2>%IxG}
import org.rut.util.algorithm.support.HeapSort; P;D)5yP092
import org.rut.util.algorithm.support.ImprovedMergeSort; X'4g\)*
import org.rut.util.algorithm.support.ImprovedQuickSort; / c1=`OJ
import org.rut.util.algorithm.support.InsertSort; Fi+v:L|
import org.rut.util.algorithm.support.MergeSort; A2{u("^[6
import org.rut.util.algorithm.support.QuickSort; #>+O=YO
import org.rut.util.algorithm.support.SelectionSort; - Dm/7Sxd`
import org.rut.util.algorithm.support.ShellSort; 7q>WO
-hav/7g
/** p/|]])2
* @author treeroot uFDJRQJ<
* @since 2006-2-2 %oasIiO
* @version 1.0 'u }|~u?m
*/ ;iJ*.wVq
public class SortUtil { 5CZii=@
public final static int INSERT = 1; e"u=4nk
public final static int BUBBLE = 2; WQ/H8rOs
public final static int SELECTION = 3; {=WTAgP
public final static int SHELL = 4; &?m|PK)I
public final static int QUICK = 5; 9NTBdo%u
public final static int IMPROVED_QUICK = 6; COe"te
public final static int MERGE = 7; C%ibIcm y
public final static int IMPROVED_MERGE = 8; zQJ9V\0
public final static int HEAP = 9; -~O7.E(ok
o}&TFhT
public static void sort(int[] data) { gTE/g'3
sort(data, IMPROVED_QUICK); kB-%T66\
} z;6Tp
private static String[] name={ @^8tk3$Y
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" bmT_tNz
}; A;nrr1-0
5mwtlC':l?
private static Sort[] impl=new Sort[]{ h}&WBN
new InsertSort(), iUl5yq
new BubbleSort(), .4c* _$
new SelectionSort(), YPQ&hEu0
new ShellSort(), TfaL5evio
new QuickSort(), vT)(#0>z
new ImprovedQuickSort(), R=g~od[N_
new MergeSort(), 7iCH$}
new ImprovedMergeSort(), ~Zbr7zVn
new HeapSort() J0BA@jH5
}; %$/t`'&o-
hu (h'
public static String toString(int algorithm){ bD_|n!3
return name[algorithm-1]; x8i;uH\8
} BsV2Q`(gT
km1{Oh
public static void sort(int[] data, int algorithm) { QR<z%4
impl[algorithm-1].sort(data); |QwX
} \M~M
Y!e
public static interface Sort { 0|<ER3xkx
public void sort(int[] data); 4G`7]<
} Ws"eF0,'Z
gBQK
public static void swap(int[] data, int i, int j) { =e'b*KTL,
int temp = data; Jh2eo+/%
data = data[j]; _=9o:F
data[j] = temp; EoM}Co
} KI~BjP\e
} QAYhAOS|e