[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; 9)F$){G]vs
} XU['lr&,W
int i1=l; p%Ns f[1>
int i2=mid+1; wLq#,X>%B
for(int cur=l;cur<=r;cur++){ |>JRJ"CFE
if(i1==mid+1) E0A[{UA
data[cur]=temp[i2++]; -t*P=V|@
else if(i2>r) O/l/$pe
data[cur]=temp[i1++]; h?QGJ^#8
else if(temp[i1] data[cur]=temp[i1++]; gE23C*!'&:
else 0sq?>$~Kc*
data[cur]=temp[i2++]; Z4k'c+
} 9:!V":8q
} >(gbUW
B.?@VF
} 4E$6&,\
PTF|"^k+
改进后的归并排序: [L2N[vy;
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package org.rut.util.algorithm.support; 9KL)5_6 M
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import org.rut.util.algorithm.SortUtil; o^d
m7cG]a~a
/** 2N&S__
* @author treeroot q' t"
* @since 2006-2-2 /7R0w
* @version 1.0 9 b&HqkXX
*/ W 6R/{H
public class ImprovedMergeSort implements SortUtil.Sort { VkC1\L6
;3=RM\
private static final int THRESHOLD = 10; A2nL=9~
FdxV#.BE
/* bL%-9BG
* (non-Javadoc) "6WE6zq
* &7w*=f8I
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) r#mH[|@W~
*/ G'iE`4`2
public void sort(int[] data) { #!jwn^yq
int[] temp=new int[data.length]; a/~1CrYr
mergeSort(data,temp,0,data.length-1); 2Gc0pBqx
} ib(4Y%U6~
zrA=?[
private void mergeSort(int[] data, int[] temp, int l, int r) { P9gAt4i
int i, j, k; 5BMrn0
int mid = (l + r) / 2; ;C5 J^xHI
if (l == r) X$<CIZ
return; /,9n1|FrG
if ((mid - l) >= THRESHOLD) AR)A <
mergeSort(data, temp, l, mid); 3Q#3S
else Y-y}gc_L
insertSort(data, l, mid - l + 1); _lw:lZM?
if ((r - mid) > THRESHOLD) Pu2cU5n
mergeSort(data, temp, mid + 1, r); JIMi~mEiN
else k|rbh.Q
insertSort(data, mid + 1, r - mid); )tx!BJiZ[
p v*f]Yzx
for (i = l; i <= mid; i++) { 9,wU[=.0
temp = data; ov Wm}!r
} FQB6` M
for (j = 1; j <= r - mid; j++) { WHR6/H
temp[r - j + 1] = data[j + mid]; Hy2~D:34
} `G>BvS5h
int a = temp[l]; EE~DU;p;]
int b = temp[r]; AgJPtzs
for (i = l, j = r, k = l; k <= r; k++) { DLEHsbP{$
if (a < b) { 5"7lWX
data[k] = temp[i++]; i)MJP*
a = temp; `_.(qg
} else { ^4 ~ V/
data[k] = temp[j--]; i=`@)E
b = temp[j]; Nj}-"R\u
} hx!hI1
} aB~=WWLR\
} g-2(W
x3=SMN|a
/** 7HQ|3rt
* @param data 10..<v7
* @param l kIH)>euZ
* @param i kO'NT:
*/ =BgQSs/^c
private void insertSort(int[] data, int start, int len) { Nk$OTDwP
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); $+w-r#,
} fsV_>5I6
} Z:<6Ck
} NfXEW-
} oedLe9!
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堆排序： [_3L
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package org.rut.util.algorithm.support; X/<Q3AK
}&/_ S
import org.rut.util.algorithm.SortUtil; +#7)'c
e-YMFJtoK}
/** 2PEA<{u
* @author treeroot pa6-3c
* @since 2006-2-2 F)uS2
* @version 1.0 ]|K@0,
*/ -<@QR8:
public class HeapSort implements SortUtil.Sort{ ; Ne|H$N
Y2P%0
/* (non-Javadoc) l#!6 tw+e?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +Am\jsq
*/ KOVR=``"/
public void sort(int[] data) { R}0!F2
MaxHeap h=new MaxHeap(); mI3 \n
h.init(data); 8Rd*`]@[pk
for(int i=0;i h.remove(); (-hGb:
System.arraycopy(h.queue,1,data,0,data.length); 5c6?$v/
} yxL(mt8
HpR(DG) ?
private static class MaxHeap{ nB#XQ8Nzx^
E9v_6d[
void init(int[] data){ F@kd[>/[
this.queue=new int[data.length+1]; = GZ,P (
for(int i=0;i queue[++size]=data; >jg"y
fixUp(size); 2sahb#e )
} .L))EB
} 9\a;75a
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private int size=0; pcO0xrI
vFl06N2
private int[] queue; ~Jx0#+z9V
P^& =L&U
public int get() { (@;=[5+
return queue[1]; gSXidh}^
} :B5M#D!dO
rCgoU xW`
public void remove() { \[W)[mH_
SortUtil.swap(queue,1,size--); M%qHf{ B
fixDown(1); <~-cp61z;
} =.8fES
file://fixdown NKE,}^C
private void fixDown(int k) { N9gbj%+
int j; y-^m
while ((j = k << 1) <= size) { PuGc{kt
if (j < size %26amp;%26amp; queue[j] j++; Kz2s{y~?
if (queue[k]>queue[j]) file://不用交换 s|o+ Im
break; 4~mmP.c
SortUtil.swap(queue,j,k); ^Qa!{9o[
k = j; 0iTh |K0
} qfl#ki`,
} `w#p8vR
private void fixUp(int k) { |Y]4PT#EE
while (k > 1) { oVja$;>
int j = k >> 1; y8CH=U[
if (queue[j]>queue[k]) [X\~J &kD
break; jP"l5
SortUtil.swap(queue,j,k); LV!<vakCK
k = j; HMPb%'U~
} 'MY0v_
} vZ/Bzy@|
a?ux
} >`=<(8bu
Vs@H>97,G
} J0O wzO
xty)*$C>
SortUtil： w4(g]9^Q
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package org.rut.util.algorithm; >Eqr/~Q
N Obw/9JO
import org.rut.util.algorithm.support.BubbleSort; A4hbh$
import org.rut.util.algorithm.support.HeapSort; O[<0\
import org.rut.util.algorithm.support.ImprovedMergeSort; /YT _~q=:
import org.rut.util.algorithm.support.ImprovedQuickSort; ERz{, >G?
import org.rut.util.algorithm.support.InsertSort; X>4qL'b:z
import org.rut.util.algorithm.support.MergeSort; ?5jq)xd2
import org.rut.util.algorithm.support.QuickSort; !pAb+6~T
import org.rut.util.algorithm.support.SelectionSort; |.Vs(0O
import org.rut.util.algorithm.support.ShellSort; b,):&M~p
IJ#+"(?7,u
/** [ T!0ka
* @author treeroot (hFyp}jkk
* @since 2006-2-2 :DoE_
* @version 1.0 rs+ ["h
*/ q>Kzl/~c.P
public class SortUtil { wC`+^>WFo
public final static int INSERT = 1; m)Sdogt_
public final static int BUBBLE = 2; ^q)AO?_
public final static int SELECTION = 3; B`?}jJa9*
public final static int SHELL = 4; F0]xc
public final static int QUICK = 5; LMTz/M
public final static int IMPROVED_QUICK = 6; uwo\FI
public final static int MERGE = 7; d_aHUmI^"
public final static int IMPROVED_MERGE = 8; $s"{C"4q
public final static int HEAP = 9; } za"rU
Z|6,*XEc
public static void sort(int[] data) { =Cg1I\
sort(data, IMPROVED_QUICK); L wP
} ['jr+gIfQ
private static String[] name={ x_$`#m{hL5
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Zj5B}[,l\
}; Ge+T[
ibn(eu<uW
private static Sort[] impl=new Sort[]{ M" R=;n
new InsertSort(), q!4eVg*
new BubbleSort(), ;<N%D=;}@
new SelectionSort(), $~r_&1
new ShellSort(), <tT.m[qg
new QuickSort(), Z+g9!@'a
new ImprovedQuickSort(), Q]hl+C$d"/
new MergeSort(), g`r4f%O
new ImprovedMergeSort(), ~Y3X*
new HeapSort() i.Z iLDs\7
}; 20?@t.aMp
pi;'!d[l%
public static String toString(int algorithm){ W@FSQ8b>$m
return name[algorithm-1]; 0AD8X+M{P
} ,jq:%Y[KZ
:b`ywSp`
public static void sort(int[] data, int algorithm) { $L"h|>b\o
impl[algorithm-1].sort(data); (C.<H6]=
} #6*20w_u
iOJ5KXrAO
public static interface Sort { FW)VyVFmk
public void sort(int[] data); OAo;vC:^
} ;DXg
yV?qX\~*
public static void swap(int[] data, int i, int j) { 2uLBk<m5c
int temp = data; O b'Br
data = data[j]; w9TE E,t;5
data[j] = temp; Znd ,FqHk
} rt'pc\|O&
} %WlTx&jSgE