[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; _jaB[Q=By
} L#fK ,r8
int i1=l; o'? WWJK6w
int i2=mid+1; .]N`]3$=
for(int cur=l;cur<=r;cur++){ <(1[n pS&+
if(i1==mid+1) s<5PsR
data[cur]=temp[i2++]; l!:L<B
else if(i2>r) uW4.Q_O!H
data[cur]=temp[i1++]; yoM^6o^,D
else if(temp[i1] data[cur]=temp[i1++]; #!P>.".
else Q~`{^fo1
data[cur]=temp[i2++]; x#hSN|'"
} TV/EC#48
} <KX+j,4
wGWv<<Qw"
} +]Ev
spWo{
改进后的归并排序: ^OK;swDW
RQ4+EW1G
package org.rut.util.algorithm.support; $y%IM`/w
=&m;5R
import org.rut.util.algorithm.SortUtil; D$VRE^k
< Yc)F.:
/** r(rT.D&
* @author treeroot @S 0mNA
* @since 2006-2-2 7tne/Yz
* @version 1.0 N|/gwcKe
*/ X2{Aa T*M
public class ImprovedMergeSort implements SortUtil.Sort { eV"Uv3
)"_&CYnd
private static final int THRESHOLD = 10; u(8dsgR
V5gr-^E
/* QY*F(S,\
* (non-Javadoc) B_RF)meux
* f/"IC;<~t>
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) # hw;aQ
*/ yE;S6 O
public void sort(int[] data) { COj^pdE3
int[] temp=new int[data.length]; =h.` ey
mergeSort(data,temp,0,data.length-1); m ;wj|@cF
} ^2i$AM1t
OHv9|&Tpl
private void mergeSort(int[] data, int[] temp, int l, int r) { n*caP9B
int i, j, k; \Qq YH^M
int mid = (l + r) / 2; .pH 4[~
if (l == r) u/xP$
return; @VyF' ?}
if ((mid - l) >= THRESHOLD) k#Qjm9V
mergeSort(data, temp, l, mid); 1B$8<NCQ=?
else 7| `_5e
insertSort(data, l, mid - l + 1); 5acC4v!T
if ((r - mid) > THRESHOLD) Vddod
mergeSort(data, temp, mid + 1, r); ]hRs -x
else "V5_B^Gzb]
insertSort(data, mid + 1, r - mid); ]#7baZ
ONUa7
for (i = l; i <= mid; i++) { -s^cy+jd
temp = data; w^:@g~
} e0IGx]5i
for (j = 1; j <= r - mid; j++) { pp2 Jy{\d
temp[r - j + 1] = data[j + mid]; \"$q=%vD
} 6U,:J'5gP
int a = temp[l]; X5= Ki $+
int b = temp[r]; bPMf='F{r
for (i = l, j = r, k = l; k <= r; k++) { i%MR<M
if (a < b) { a(uQGyr[k1
data[k] = temp[i++]; #v4^,$k>
a = temp; 4-9cp=\PE
} else { "9Br)3
data[k] = temp[j--]; QaXdO=3
b = temp[j]; mS.!lkV
} yr)e."#S
} U^-RyE!}
} Ifq|MZ\
kjr q;j:
/** 5nK|0vv%2
* @param data r^Soqom3
* @param l ObataUxQT
* @param i k"cKxzB
*/ I,V'J|=j
private void insertSort(int[] data, int start, int len) { [7[$P.MS{
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ^plP1c:
} !_?HSDAj"n
} <!X]$kvG
} N8!e(YK_
} -CPLgT
]ij:>O@{$
堆排序： UYpln[S
GF0Utp:Zf;
package org.rut.util.algorithm.support; ^SS9BQ*m
'NnmLM(oh
import org.rut.util.algorithm.SortUtil; NNRKYdp,
f&XM|Bg
/** 1+-F3ROP
* @author treeroot r?`7i'
* @since 2006-2-2 myB!\WY
* @version 1.0 1z3I^gI*i
*/ T8vMBaU!qY
public class HeapSort implements SortUtil.Sort{ 6|1#Prj
>~&7D`O
/* (non-Javadoc) ;;LiZlf
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) =gSACDTc
*/ \BSPv]d
public void sort(int[] data) { o7g6*hJz
MaxHeap h=new MaxHeap(); 92*Y( >
h.init(data); v2mqM5Z
for(int i=0;i h.remove(); fy!,cK};
System.arraycopy(h.queue,1,data,0,data.length); `]<~lf
} !i=k=l=
E+eC #!&w
private static class MaxHeap{ uL@'Hv A
P"c7h7
void init(int[] data){ r}t%DH
this.queue=new int[data.length+1]; y;HJ"5.Mw
for(int i=0;i queue[++size]=data; Pu!%sGjD
fixUp(size); 1;+(HB
} .PJ_1
} N)$yBzN
hfQ^C6yR
private int size=0; i(<do "Am<
_NM=9cWd
private int[] queue; "gi 1{
D5 ^WiQ<
public int get() { -Cf< #'x_
return queue[1]; qd?k#Gw&
} YCB=RT]&`
skfFj&_T
public void remove() { -ID!kZx
SortUtil.swap(queue,1,size--); p:^;A/D
fixDown(1); %g%#=a;]q
} "8`f x
file://fixdown {-\VX2:;[9
private void fixDown(int k) { _6Fj&mw(u
int j; Nc:>]
while ((j = k << 1) <= size) { .e%B'
if (j < size %26amp;%26amp; queue[j] j++; :. a}pgh
if (queue[k]>queue[j]) file://不用交换 _ ;_NM5
break; B1a&'WX?
SortUtil.swap(queue,j,k); BM]sW:-v
k = j; 'm+)n08[
} [.`#N1-@M
} B^uQv|m
private void fixUp(int k) { W%RjjLJ@
while (k > 1) { "5R8Zl+
int j = k >> 1; ``mW\=fe
if (queue[j]>queue[k]) `l95I7
break; gb_k^wg~1'
SortUtil.swap(queue,j,k); E`SFr
k = j; I 0}+}{M:
} t,K_!-HX+
} &Q"Ox{~W
we&g9j'
} C0F#PXUy
{'#^
} 29E9ZjSK
\f_YJit
SortUtil： %maLo RJ
%Ot^G%34
package org.rut.util.algorithm; 3N,!y
=@>[
import org.rut.util.algorithm.support.BubbleSort; I)Dd"I
import org.rut.util.algorithm.support.HeapSort; NK+iLXC
import org.rut.util.algorithm.support.ImprovedMergeSort; @iwg`j6ol
import org.rut.util.algorithm.support.ImprovedQuickSort; :8bz+3p
import org.rut.util.algorithm.support.InsertSort; 4=>4fia&D
import org.rut.util.algorithm.support.MergeSort; nx >PZb
import org.rut.util.algorithm.support.QuickSort; 8*^Q#;^~99
import org.rut.util.algorithm.support.SelectionSort; m4~Co*]w
import org.rut.util.algorithm.support.ShellSort; 1dF=BR8
{g *kr1JM
/** {%5tqF
* @author treeroot u"\HBbBx
* @since 2006-2-2 E,nC}f
* @version 1.0 ajayj|h
*/ HUtuUX
public class SortUtil { KF|<A@V
public final static int INSERT = 1; zUqt^_
public final static int BUBBLE = 2; 3Q`F x
public final static int SELECTION = 3; yD+)!q"
public final static int SHELL = 4; &LO<!WKQ
public final static int QUICK = 5; Y zXL8
public final static int IMPROVED_QUICK = 6; hgCeU+H
public final static int MERGE = 7; hmOhXE[a&
public final static int IMPROVED_MERGE = 8; SR#X\AWM
public final static int HEAP = 9; 33_YZOy^j
#k1%}k=
public static void sort(int[] data) { n_%JXm#\
sort(data, IMPROVED_QUICK); mKwhd} V
} iXc-_V6
private static String[] name={ MX 2UYZ&
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" [EDw0e
}; rHu#
CE>RAerY
private static Sort[] impl=new Sort[]{ Yz0ruhEMk
new InsertSort(), #~54t0|Cd>
new BubbleSort(), N0GID-W!/~
new SelectionSort(), lM C4j
new ShellSort(), <D4.kM
new QuickSort(), SeBbI&Ju
new ImprovedQuickSort(), &%`IPhbT
new MergeSort(), x"~F=jT
new ImprovedMergeSort(), *Wv]DV=\
new HeapSort() ,ijgqEN
}; HHD4#XcU
2>#Pt^R:C
public static String toString(int algorithm){ MI|DOp
return name[algorithm-1]; dWE[*a\g
} eP-q[U?$n
G8@({EY
public static void sort(int[] data, int algorithm) { =*qu:f\y
impl[algorithm-1].sort(data); ;uNcrv0J
} fR}|CP
AZxx%6
public static interface Sort { |HJdpY>Uu
public void sort(int[] data); n8Jx;j
} kssS,Ogf\_
X%xX3e'
public static void swap(int[] data, int i, int j) { m1=3@>
int temp = data; Y:]~~-f\~
data = data[j]; }-k<>~FA
data[j] = temp; x`w 4LF
} C<2vuZD
} 1agyT