[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; :\V,k~asl
} r>qA $zD^
int i1=l; OKwOugi0
int i2=mid+1; )wf\F6jN
for(int cur=l;cur<=r;cur++){ |LYKc.xo
if(i1==mid+1) nx4P^PC
data[cur]=temp[i2++]; J l7z|QS
else if(i2>r) w4MwD?i]R
data[cur]=temp[i1++]; (N U0Tw
else if(temp[i1] data[cur]=temp[i1++]; O25mkX
else ?9U:g(v
data[cur]=temp[i2++]; Di??Q_$ak
} StQ@g
} `B#Z;R
kN'Thq/ZE
} sj9D
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改进后的归并排序: 2Ug.:![
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package org.rut.util.algorithm.support; F ! )-|n}
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import org.rut.util.algorithm.SortUtil; *)PG-$6X&
g{DFS[h
/** aV|k}H{wt
* @author treeroot Lbq_~
* @since 2006-2-2 44C+h
* @version 1.0 29O]S8
*/ NV!4(_~
public class ImprovedMergeSort implements SortUtil.Sort { {,V$*
=WRO\lgv.
private static final int THRESHOLD = 10; c/$*%J<
Y. TYc;
/* FX 1C e
* (non-Javadoc) /VtlG+dLl
* '?}R4w|)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) YmCbxYa7
*/ %1jdiHTaL
public void sort(int[] data) { ^uBwj}6
int[] temp=new int[data.length]; !"(u_dFw
mergeSort(data,temp,0,data.length-1); Dm4B
} 4hNwKe"Ki
|LFUzq>j
private void mergeSort(int[] data, int[] temp, int l, int r) { *SGlqR['\e
int i, j, k; /Su)|[/'
int mid = (l + r) / 2; ("F)
if (l == r) f=oeF]=I"
return; 4.k`[q8
if ((mid - l) >= THRESHOLD) _>Ln@
mergeSort(data, temp, l, mid); T/7vM6u
else FAd``9kRT
insertSort(data, l, mid - l + 1); 4@~a<P#
if ((r - mid) > THRESHOLD) 5\?3$<1I
mergeSort(data, temp, mid + 1, r); K!7q!%Ju
else (. H]|
insertSort(data, mid + 1, r - mid); u7(];
=WjJN Q
for (i = l; i <= mid; i++) { u !.DnKu
temp = data; D@5s8xv
} zze z~bv7:
for (j = 1; j <= r - mid; j++) { .S6ji~;r
temp[r - j + 1] = data[j + mid]; wzxdVn 'S
} () <`t}FQ
int a = temp[l]; w#<^RKk
int b = temp[r]; R%W@~o\p]
for (i = l, j = r, k = l; k <= r; k++) { ,M{Q}:$+4
if (a < b) { vh{9'vd3el
data[k] = temp[i++]; 2b!j.T#u
a = temp; 5R"2Wd
} else { a.CF9m5]c
data[k] = temp[j--]; O*ImLR)i+s
b = temp[j]; fo;6huz
} 4y1>
} \"J?@
} 5<^'Cy
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/** }!=gP.Zu^
* @param data Y.(v{l
* @param l y]<#%Fh
* @param i yT&x`3f"i
*/ *3P3M}3~\
private void insertSort(int[] data, int start, int len) { OZa88&
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ~JAjr(G#o
} 0K/G&c?;=
} e& p_f<
} B%2L1T=
} q;ZLaX\bFl
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堆排序： /MhS=gVxM
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package org.rut.util.algorithm.support; TZ:34\u
})KJ60B
import org.rut.util.algorithm.SortUtil; i,([YsRuou
,TEuM|
/** _Q)d+Fl
* @author treeroot %V31B\]Nz7
* @since 2006-2-2 W"dU1]
* @version 1.0 'YBi5_
*/ Xthtw*
public class HeapSort implements SortUtil.Sort{ B>sCP"/uV
]GQv4-y
/* (non-Javadoc) QH4k!^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0r0c|*[+4z
*/ Jc`Rs"2
public void sort(int[] data) { 75kKDR}6
MaxHeap h=new MaxHeap(); ~:T3|
h.init(data); |O57N'/
for(int i=0;i h.remove(); L{Q4=p,A
System.arraycopy(h.queue,1,data,0,data.length); 7AI3|Ts]p
} ,.[.SU#V
ud yAP>
private static class MaxHeap{ Cca6L9%
qC\]"Z`m
void init(int[] data){ y+?=E g
this.queue=new int[data.length+1]; {a]pF.^kf
for(int i=0;i queue[++size]=data; S|~i>
fixUp(size); >~h>#{&
} r|l53I5
} PP!l
&}>|5>cJu
private int size=0; f9vcf# 2
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private int[] queue; $< A8gTJ
5woIGO3X
public int get() { D}mo\
return queue[1]; >sn"
} MhHr*!N"}
)!N2'Ld
public void remove() { iP2U]d~M
SortUtil.swap(queue,1,size--); :/>7$)+
fixDown(1); ^Vl^,@
} ;>inT7?3|
file://fixdown ,D:iQDG^
private void fixDown(int k) { }/_('q@s\
int j; o~Bk0V=
while ((j = k << 1) <= size) { nsZDZ/jx
if (j < size %26amp;%26amp; queue[j] j++; lO551Y^
if (queue[k]>queue[j]) file://不用交换 ?+bTPl;%'
break; pZc9q8j3
SortUtil.swap(queue,j,k); Coga-: 2vu
k = j; R'vdk<
} 'u4}t5Bu5
} )EhTM-1
private void fixUp(int k) { FI3sLA
while (k > 1) { :X3rd|;kc
int j = k >> 1; |hu"5*
if (queue[j]>queue[k]) $.ymby
break; _pY
SortUtil.swap(queue,j,k); )fxo)GS
k = j; <'g0il
} 3{.9O$
} p5lR-G
2AdX)iF@
} DH}s1mNMP
:GN)7|:
} d[~au=b
Gh>"s#+
SortUtil： N%|^;4}k
~*66 3pA
package org.rut.util.algorithm; @/_XS4
d/0/$Bz}P
import org.rut.util.algorithm.support.BubbleSort; 5A0KV7N5
import org.rut.util.algorithm.support.HeapSort; wo,""=l
import org.rut.util.algorithm.support.ImprovedMergeSort; t:?<0yfp&
import org.rut.util.algorithm.support.ImprovedQuickSort; rg#qSrHp
import org.rut.util.algorithm.support.InsertSort; 5O;/ lX!u
import org.rut.util.algorithm.support.MergeSort; Y}V)4j
import org.rut.util.algorithm.support.QuickSort; eLHa9R{)B
import org.rut.util.algorithm.support.SelectionSort; Y;a6:>D%cT
import org.rut.util.algorithm.support.ShellSort; +=n x|:no
|YG)NO
/** y)N.LS
* @author treeroot S&4w`hdD>~
* @since 2006-2-2 PO=ZxG
* @version 1.0 #C;#$|d
*/ sg!=Q+
public class SortUtil { ,g<>`={kK+
public final static int INSERT = 1; S>/I?(J
public final static int BUBBLE = 2; @B>%B EC
public final static int SELECTION = 3; B}TInI%H
public final static int SHELL = 4; F1Zk9%L%9$
public final static int QUICK = 5; `4"y#Z
public final static int IMPROVED_QUICK = 6; ve64-D
public final static int MERGE = 7; &?`d8\z
public final static int IMPROVED_MERGE = 8; ByB0>G''.
public final static int HEAP = 9; Sgjr4axu
I&Eg-96@
public static void sort(int[] data) { '|dKg"Yl
sort(data, IMPROVED_QUICK); >$k4@eg!
} d-A%ZAkE]
private static String[] name={ {ra Esb-X
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" @BB,i /
}; ?(`nBlWQ5
K|Ij71
private static Sort[] impl=new Sort[]{ K4VPmkG
new InsertSort(), 45!`g+)
new BubbleSort(), '3Lx!pMhN
new SelectionSort(), YA8yMh*4D?
new ShellSort(), sDh6 Uk
new QuickSort(), 'nmYB:&!
new ImprovedQuickSort(), ['9OGV\
new MergeSort(), ]i_):@
new ImprovedMergeSort(), Qbe{/
new HeapSort() ^/5E773
}; .+yJh
OU Yb-
public static String toString(int algorithm){ RIVN>G[;L
return name[algorithm-1]; .q;RNCUt
} .Q6{$Y%l
=f{Z~`3
public static void sort(int[] data, int algorithm) { "78cl*sD
impl[algorithm-1].sort(data); 4HYH\ey
} JY,l#?lM{
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public static interface Sort { |SJ% _#=i
public void sort(int[] data); 5SPl#*W
} e\bF_ N2VA
|RbUmuj
public static void swap(int[] data, int i, int j) { N[?4yV2s
int temp = data; n6-!@RYr
data = data[j]; y^Xxa'y
data[j] = temp; FL_ arhrqD
} CB7R{~ $
} -<VF6k<