[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; l 4e`-7
} rJws#^]
int i1=l; z]33_[G1U
int i2=mid+1; 1_V',0|`>
for(int cur=l;cur<=r;cur++){ JV_V2L1Ut
if(i1==mid+1) nhb: y
data[cur]=temp[i2++]; _YPu
else if(i2>r) KoF_G[m
data[cur]=temp[i1++]; HCOE'24I
else if(temp[i1] data[cur]=temp[i1++]; ^f_4w|u,+
else }Gi4`Es
data[cur]=temp[i2++]; #}|g8gh
} V0/O T~gS8
} x!^u$5c
CTh!|mG
} ReZ&SNJ
ZgH(,g,TU
改进后的归并排序: s$PPJJT{b
XPd@>2
package org.rut.util.algorithm.support; r.#"he_6!.
_+NM<o#A
import org.rut.util.algorithm.SortUtil; YfZ96C[a
f>kW\uC
/** EI!e0V1!
* @author treeroot f.Feo
* @since 2006-2-2 /+zzZnLl-M
* @version 1.0 7%F8
*/ {ZR>`'^:
public class ImprovedMergeSort implements SortUtil.Sort { hsEQ6
R\^XF8n6/
private static final int THRESHOLD = 10; =*Ru2
H%^j yGS
/* zilM+BZ8
* (non-Javadoc) m%[`NP (
* XJ{b_h#N
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) p"ElO,\
*/ '3eL^Aq
public void sort(int[] data) { Z&[_8Y5j
int[] temp=new int[data.length]; N"Mw1R4
mergeSort(data,temp,0,data.length-1); T]0H&Oov
} A$;"9F@
),;O3:n
private void mergeSort(int[] data, int[] temp, int l, int r) { 8DO3L "
int i, j, k; ne-;gTP;
int mid = (l + r) / 2; 8 bpYop7 L
if (l == r) <V_P)b8$1
return; HLsG<#
if ((mid - l) >= THRESHOLD) O;m@fS2%3
mergeSort(data, temp, l, mid); lOJ3_8
else f'28s*n
insertSort(data, l, mid - l + 1); QxS=W2iN
if ((r - mid) > THRESHOLD) Qqn9nO9
mergeSort(data, temp, mid + 1, r); q{E44 eQ7F
else &|&tPD/dJ
insertSort(data, mid + 1, r - mid); w/UZ6fu
J_ y+.p- 5
for (i = l; i <= mid; i++) { nBo?r}t4
temp = data; # @~HpqqR
} qr|v|Ejd~
for (j = 1; j <= r - mid; j++) { 0oiz V;B5%
temp[r - j + 1] = data[j + mid]; 1p }:K`#{
} 0kOl,%Ey
int a = temp[l]; =>en<#[\:
int b = temp[r]; N,F$^ q6
for (i = l, j = r, k = l; k <= r; k++) { d@aPhzLu
if (a < b) { .|Y&,?k|Y
data[k] = temp[i++]; 7w?V0pLwn8
a = temp; N`1W"Rx!
} else { %{*)-_M
data[k] = temp[j--]; .lE7v-e
b = temp[j]; UD}#c:I
} Z:3SI$tO
} '#Pg:v_
} /.>8e%)
{M&Vh]
/** "2 "gTS
* @param data I/V lH:o
* @param l EnD}|9
* @param i .{ +Obi
*/ #'lqE)T
private void insertSort(int[] data, int start, int len) { r< ~pSj
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); '7;b+Vbl#
} ZA{T0:
} h =E)5&Z
} rD":Gac
} zC<k4[.
Lw_s'QNWR
堆排序： !gbPxfH:6
qOM"?av
package org.rut.util.algorithm.support; *s1^s;LR
BfUM+RC%5
import org.rut.util.algorithm.SortUtil; .m/$ku{/J
`j)S7KN
/** L$rMfeS
* @author treeroot ]R?{9H|jwE
* @since 2006-2-2 %f'mW2
* @version 1.0 (]gd$BgD
*/ :+*q,lX8
public class HeapSort implements SortUtil.Sort{ TVs#,
3I):W9$Qp
/* (non-Javadoc) T_3JAH e
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) XMpa87\
*/ & cV$`L
public void sort(int[] data) { , tb\^
MaxHeap h=new MaxHeap(); DITo.PU
h.init(data); Ae[Na:G+
for(int i=0;i h.remove(); {2,vxGi
System.arraycopy(h.queue,1,data,0,data.length); ~>-MVp
} *JT,]7>
tkjQSz
private static class MaxHeap{ &Ay[mZQ 7
NcMohpkq
void init(int[] data){ vj,OX~|
this.queue=new int[data.length+1]; 43m@4Yb
for(int i=0;i queue[++size]=data; 6#gS`X23Y
fixUp(size); LfsqtQ=J`
} mtd ,m
} pEp`Z,p
2*)2c[/0F
private int size=0; R&MdwTa
1~aP)q
private int[] queue; Vz @2_k
=&~7Q"
public int get() { [~&yLccN
return queue[1]; ~OSgpM#O!T
} b<bj5m4fz>
[Rxbb+,U
public void remove() { p'f8?jt
SortUtil.swap(queue,1,size--); ~H4wsa39
fixDown(1); o!@}&DE|*L
} h'm-]v
file://fixdown E>I\m!ue
private void fixDown(int k) { hb="J349
int j; =`pH2SJT
while ((j = k << 1) <= size) { z&KrG
if (j < size %26amp;%26amp; queue[j] j++; iKM!>Fi
if (queue[k]>queue[j]) file://不用交换 #AO?<L
break; 0(|Yy/Yq
SortUtil.swap(queue,j,k); rHaj~s 4
k = j; )sZJH9[K
} !%X#;{
} Cno+rmsfT
private void fixUp(int k) { hH(w O\s
while (k > 1) { U]AJWC6
int j = k >> 1; .$"13"
if (queue[j]>queue[k]) q"9 2][}
break; !*G%vOa
SortUtil.swap(queue,j,k); N(Sc!rX
k = j; +oevNM
} \`U=pZJ
} XT%\Ce!
r\T'_wo
} /nWBol,
SUC'o"
} fvBL? x
@s.civ!Yk
SortUtil： sXaudT
N3(.7mxo
package org.rut.util.algorithm; ORx6r=zg
qd<-{
import org.rut.util.algorithm.support.BubbleSort; Lvd es.0|
import org.rut.util.algorithm.support.HeapSort; cNl NJ
import org.rut.util.algorithm.support.ImprovedMergeSort; cw3j&k
import org.rut.util.algorithm.support.ImprovedQuickSort; W7#dc89}
import org.rut.util.algorithm.support.InsertSort; 8vqx}2
import org.rut.util.algorithm.support.MergeSort; vdIert?p
import org.rut.util.algorithm.support.QuickSort; ? FlQ\q
import org.rut.util.algorithm.support.SelectionSort; |}><)}
import org.rut.util.algorithm.support.ShellSort; Zk] /m
|R&cQKaQ`
/** !rsGCw!Pg
* @author treeroot ?>s[B7wMp
* @since 2006-2-2 SceK$
* @version 1.0 b[KZJLZ)
*/ ^_gH}~l+U
public class SortUtil { e);`hNLih
public final static int INSERT = 1; Z^!% b
public final static int BUBBLE = 2; Fs(FI\^
public final static int SELECTION = 3; %k'>bmJ
public final static int SHELL = 4; <&RpGAk%I
public final static int QUICK = 5; p?2^JJpUb
public final static int IMPROVED_QUICK = 6; R8-=N+hX
public final static int MERGE = 7; ?[<#>,W
public final static int IMPROVED_MERGE = 8; yu>)[|-
public final static int HEAP = 9; oJ?,X^~_
< Dt/JA(p
public static void sort(int[] data) { GIZw/L7Yb
sort(data, IMPROVED_QUICK); Ge7Uety
} Nsn~mY%
private static String[] name={ cq0-Dd9^&
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ryNe=9p
}; v>0I=ut
p""\uG'
private static Sort[] impl=new Sort[]{ +"1fr
new InsertSort(), .XT]\'vW
new BubbleSort(), -v! ;
new SelectionSort(), YeS5%?Fk
new ShellSort(), s}F.D^^G
new QuickSort(), 1ixBwnp?
new ImprovedQuickSort(), }qT{" *SC
new MergeSort(), [vqf hpz
new ImprovedMergeSort(), ;ObrBN,Fu
new HeapSort() F0kdwN4;
}; k+BY3a
]P/i}R:
public static String toString(int algorithm){ #>M^BOR8
return name[algorithm-1]; K7X*N
} )FN\jo!!.
z HT#bP:o
public static void sort(int[] data, int algorithm) { ,N1pww?
impl[algorithm-1].sort(data); N[A9J7}_R
} ,bzC|AK
IIN,Da;hD
public static interface Sort { Re+oCJ
public void sort(int[] data); ,_TE@]!$
} 6 2#@Y-5
L*OG2liJ
public static void swap(int[] data, int i, int j) { bFhZSk)
int temp = data; "U!Vdt2vp
data = data[j]; =~k}XB
data[j] = temp; EU7nS3K)O~
} 0t[ 1#!=k
} pgQ^w0BQV