[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")8+?
} 1<x5{/CZ
int i1=l; e#5WX
int i2=mid+1; j\KOKvY)
for(int cur=l;cur<=r;cur++){ iU.` TqR7
if(i1==mid+1) EM<W+YU
data[cur]=temp[i2++]; u^C\aujg
else if(i2>r) K'8o'S_bF
data[cur]=temp[i1++]; R5MN;xG^
else if(temp[i1] data[cur]=temp[i1++]; Usht\<{
else o$bQ-_B`
data[cur]=temp[i2++]; Y]R=z*i%
} EO'+r[Y
} 9J%O$sF
Q +hOW-
} br0\O
+ ,]&&
改进后的归并排序: q:>`|~MX
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package org.rut.util.algorithm.support; "c~``i\G
zhE4:g9v
import org.rut.util.algorithm.SortUtil; Fc=F2Mo?
n"iaE
/** M&zB&Ia"'
* @author treeroot 2:.$:wS
* @since 2006-2-2 $m>( kd1
* @version 1.0 ]nV_K}!w
*/ jMWTNZ
public class ImprovedMergeSort implements SortUtil.Sort { !K_<7iExI\
\Q`#E'?
private static final int THRESHOLD = 10; LCRWC`%&
hBZh0xy
/* :n<l0
* (non-Javadoc) d?U,}tv
* fX:G;vYn
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Lo'GfHE
*/ ~&0lWa
public void sort(int[] data) { x6T$HN/2
int[] temp=new int[data.length]; %xx;C{g;a
mergeSort(data,temp,0,data.length-1); vRmzjd~
} !N:w?zsp
$m.'d*e5
private void mergeSort(int[] data, int[] temp, int l, int r) { %D7^.
int i, j, k; /ORK9g
int mid = (l + r) / 2; pOy(XUV9O
if (l == r) |<]wM(GxE
return; RionKiN
if ((mid - l) >= THRESHOLD) 4wS!g10}
mergeSort(data, temp, l, mid); '6WZi|(a
else <1sUK4nQ,
insertSort(data, l, mid - l + 1); qyE*?73W
if ((r - mid) > THRESHOLD) ,^iT,MgNNf
mergeSort(data, temp, mid + 1, r); 50S*_4R
else H6#SP~V
insertSort(data, mid + 1, r - mid); O>wGJ.
qqYQ/4Ajw
for (i = l; i <= mid; i++) { dZ,7q_r,~
temp = data; tr 8Q{
} N:^4OnVR
for (j = 1; j <= r - mid; j++) { 00W_XhJ
temp[r - j + 1] = data[j + mid]; <1V>0[[e
} zS\m8[+]
int a = temp[l]; aIfB^M*c5
int b = temp[r]; w `M/0.)V
for (i = l, j = r, k = l; k <= r; k++) { ,;= S\
if (a < b) { iQh:y:Jo1&
data[k] = temp[i++]; p{V(! v|
a = temp; sYTToanA$?
} else { 78mJ3/?rC
data[k] = temp[j--]; FP6JfI8
b = temp[j]; s;[64ca]Q
} Q!fk|D+j
} HBa6Y&)<
} G)5Uiu:^X
/X\:3P
/** e+MsFXnB8
* @param data .fzns20u
* @param l +zFEx%3^
* @param i RoD9
*/ z\IZ5'
private void insertSort(int[] data, int start, int len) { ,+_gx.H2j
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); /3`fO^39Ta
} # WL5p.
} xiQd[[(sM
} 1$c[G}h
} kb*b|pWlO
M w+4atO4[
堆排序： G>^ _&(c@2
1UH_"Q03
package org.rut.util.algorithm.support; R<>uCF0
,S3uY6,
import org.rut.util.algorithm.SortUtil; f2$<4Hhmm
M<)Vtn
/** SQ`ec95',
* @author treeroot TkjZI}]2
* @since 2006-2-2 +m6acu)N.
* @version 1.0 ukXKUYNm8
*/ "k7C
public class HeapSort implements SortUtil.Sort{ =~j S
Bv=:F5hLG
/* (non-Javadoc) *5'l"YQ@1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Su`] ku'
*/ 3DrW[\
public void sort(int[] data) { yH@2nAn
MaxHeap h=new MaxHeap(); ~\+mo
h.init(data); 'P >h2^z
for(int i=0;i h.remove(); O%s?64^U
System.arraycopy(h.queue,1,data,0,data.length); cy_zEJjbD
} ^t)alNGos
O$&4{h`
private static class MaxHeap{ cA B^]j
}D#[yE,=\
void init(int[] data){ Ru`7Xd.
this.queue=new int[data.length+1]; q/\Hh9`
for(int i=0;i queue[++size]=data; (@u"
fixUp(size); QcDtZg\
} "C%* 'k
} F|W(_llfM
xXc3#n
private int size=0; T_?,?
_;5N@2?
private int[] queue; q0]Z` <w
QW"BGg~6c
public int get() { 5},kXXN{+
return queue[1]; ,n+~S^r
} bG9$&,
DC%H(2
public void remove() { cY\"{o"C
SortUtil.swap(queue,1,size--); erZ%C <
fixDown(1); 3P2L phW
} (&Z`P
file://fixdown lvZ:Aw r
private void fixDown(int k) { 4wQ>HrS)(
int j; Lv?e[GA
while ((j = k << 1) <= size) { (!`]S>_w9
if (j < size %26amp;%26amp; queue[j] j++; [6t!}q
if (queue[k]>queue[j]) file://不用交换 7Cj6Kw5k
break; UKxeN[fv
SortUtil.swap(queue,j,k); %phv<AW
k = j; JmK[7t
} m`lsUN,
} ^aG=vXK`b
private void fixUp(int k) { x,SzZ)l-9
while (k > 1) { *z A1NH5
int j = k >> 1; (Q09$
if (queue[j]>queue[k]) & ]/Z~Vt
break; ^yB>0/{)z
SortUtil.swap(queue,j,k); .AgD`wba
k = j; $w$4RQk3n
} 77ID 82
} UF00K1dbz
"~lGSWcU
} 7Q9zEd"d
&ii3Vlyzg
} mmj6YQ0a
G_] (7
SortUtil： n3kYVAgF
_ADK8a6%)
package org.rut.util.algorithm; 9H<6k*
=K)au$BE|
import org.rut.util.algorithm.support.BubbleSort; Sgt@G=_o
import org.rut.util.algorithm.support.HeapSort; z;_d?S<*m
import org.rut.util.algorithm.support.ImprovedMergeSort; kOGpe'bV
import org.rut.util.algorithm.support.ImprovedQuickSort; `8 Dgk}
import org.rut.util.algorithm.support.InsertSort; |h,aV(Q
import org.rut.util.algorithm.support.MergeSort; \5%T'S@5
import org.rut.util.algorithm.support.QuickSort; l%^'K%'b
import org.rut.util.algorithm.support.SelectionSort; /L1qdkG
import org.rut.util.algorithm.support.ShellSort; *zy0,{bl
K6.*)7$#
/** .TURS
* @author treeroot ,zLi{a6
* @since 2006-2-2 IdlW[h3`[
* @version 1.0 uL!{xuN
*/ QMzBx*g(
public class SortUtil { .s_wP
public final static int INSERT = 1; wK[xLf
public final static int BUBBLE = 2; wL2d.$?TEg
public final static int SELECTION = 3; (s,*soAN
public final static int SHELL = 4; ipEsR/O
public final static int QUICK = 5; Ywf.,V
public final static int IMPROVED_QUICK = 6; l|fOi A*K
public final static int MERGE = 7; ^z$-NSlI
public final static int IMPROVED_MERGE = 8; >Z?3dM~[
public final static int HEAP = 9; ;fhFv&`mE
%/H
public static void sort(int[] data) { `?Wak=]g
sort(data, IMPROVED_QUICK); 67Ai.3dR
} G1Cn[F;e
private static String[] name={ EeKEw Sg
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" & h9ji[
}; 9[|Ql
un[Z$moN"
private static Sort[] impl=new Sort[]{ 77OH.E|$
new InsertSort(), c{j0A;XMS
new BubbleSort(), ;KmSz 1A
new SelectionSort(), k@AOE0m
new ShellSort(), gydPy*
new QuickSort(), gQ*0Mk
new ImprovedQuickSort(), rZZueYuXO
new MergeSort(), jj#K[@u
new ImprovedMergeSort(), l?B\TA^
new HeapSort() 4)iSz>
}; X#(?V[F]
*;O$=PE
public static String toString(int algorithm){ u9e A"\s
return name[algorithm-1]; ?G1-X~Z8
} @q2Yka
bxO8q57
public static void sort(int[] data, int algorithm) { rZ1${/6
impl[algorithm-1].sort(data); vI#\Qe
} uA:|#mO
\no[>L]
public static interface Sort { ;]MHU/
public void sort(int[] data); \A _g
} X#-U
[a5L WW
public static void swap(int[] data, int i, int j) { 6.2_UN^<
int temp = data; Uw5z]Jck
data = data[j]; xe2Ap[Y'M
data[j] = temp; Q,Hw@w<1
} "W|Sh#JF
} 8\`]T%h