[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; 8LV6E5Q
} /2Izj/Q
int i1=l; ?LMQz=
int i2=mid+1; y._'o7%
for(int cur=l;cur<=r;cur++){ dD,}i$
if(i1==mid+1) UL[,A+X8D
data[cur]=temp[i2++]; j]Gn\QF
else if(i2>r) !Z_+H<fi+I
data[cur]=temp[i1++]; e!6yxL*[@[
else if(temp[i1] data[cur]=temp[i1++]; ebA95v`Vms
else $+j1^
data[cur]=temp[i2++]; X}(s(6
} ,Zmjw@w
} )N 3^r>(e<
XG|N$~N+2
} $;5Q mKQ'
tW/k
改进后的归并排序: EE9w^.3a
V$ZclV2:Ih
package org.rut.util.algorithm.support; N.*)-O
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import org.rut.util.algorithm.SortUtil; 5 `1
B[8bkFS>]
/** ^J]&($-
* @author treeroot Q`F1t
* @since 2006-2-2 \2@J^O1,
* @version 1.0 oC`F1!SfOO
*/ >YI Vi4''
public class ImprovedMergeSort implements SortUtil.Sort { !E$$FvL
(MLcA\LJ
private static final int THRESHOLD = 10; 6Vnq|;W3Zv
[ar0{MPYd
/* 44KoOY_
* (non-Javadoc) 4jXo5SkEJ
* & /8Tth86
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 40?RiwwD
*/ 0+SDFh
public void sort(int[] data) { tWn dAM(U7
int[] temp=new int[data.length]; a&>NuMDI
mergeSort(data,temp,0,data.length-1); +q&Hj|;8r
} SnE^\I^O
??F* Z"x
private void mergeSort(int[] data, int[] temp, int l, int r) { xhP~]akHN7
int i, j, k; ZiUb+;JA
int mid = (l + r) / 2; R;DU68R
if (l == r) vRe{B7}p;
return; F! =l r
if ((mid - l) >= THRESHOLD) lpG%rN!
mergeSort(data, temp, l, mid); ^/BGOBK
else k6CXuU
insertSort(data, l, mid - l + 1); ;VE y{%nF
if ((r - mid) > THRESHOLD) m*m),mZ"
mergeSort(data, temp, mid + 1, r); -,bnj^L
else uw\@~ ,d
insertSort(data, mid + 1, r - mid); #gbB// <
xr'1CP
for (i = l; i <= mid; i++) { +vkmS
temp = data; l!*_[r
} +gd5&
for (j = 1; j <= r - mid; j++) { t"$~o:U&)
temp[r - j + 1] = data[j + mid]; 3en9TB
} mG S4W;
int a = temp[l]; z>W:+W"o
int b = temp[r]; %>FtA)
for (i = l, j = r, k = l; k <= r; k++) { >._d2.Q'
if (a < b) { Uxjc&o
data[k] = temp[i++]; -leX|U}k
a = temp; Q]9$dr=Kk0
} else { r *K
data[k] = temp[j--]; !JA;0[;l=
b = temp[j]; )R7Sh51P
} zamMlmls^
} h'"m,(a
} Na91K4r#
.I:rb~&
/** >[ B.y
* @param data s#Dj>Fej
* @param l {<yapBMw
* @param i ZR!8hw8
*/ ) lUS'I
private void insertSort(int[] data, int start, int len) { ^Wld6:L{I
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); tLu&3<%
} E7$&:xqx
} [[|#}D:L
} (~DW_+?]'
} 9w-\K]
*s4|'KS2o
堆排序： [Vs\r&qL
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package org.rut.util.algorithm.support; %}@iz(*}>
i >3`V6
import org.rut.util.algorithm.SortUtil; ?W'z5'|
`O6#-<>
/** F;Q,cg M
* @author treeroot s!(R
* @since 2006-2-2 L3{(Bu
* @version 1.0 -+E.I*st
*/ n%3!)/$
public class HeapSort implements SortUtil.Sort{ 7i($/mNl
_*~F1% d
/* (non-Javadoc) G!j9D
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) r~,y3L6ic
*/ /V,xSK9.&
public void sort(int[] data) { _=$~l^Y[
MaxHeap h=new MaxHeap(); ,1ev2T
h.init(data); .RpJZ[E
for(int i=0;i h.remove(); Xmr}$<<=
System.arraycopy(h.queue,1,data,0,data.length); MT/jpx
} {]>c3=~FQb
[S'1OR$FQ\
private static class MaxHeap{ r<0E[~
*duG/?>P
void init(int[] data){ dBI-y6R
this.queue=new int[data.length+1]; TKnWhB/J
for(int i=0;i queue[++size]=data; LtRRX@qJw
fixUp(size); m%L!eR
} /MtmO$.
} [~N;d9H+*1
<);q,|eh2
private int size=0; q=t!COS
-jJhiaJ$<
private int[] queue; CA#g(SiZ
^{"i eVn
public int get() { eJoM4v
return queue[1]; p-$C*0{
} z)T-<zWO;
qy|bOl
public void remove() { {\5(aQ)Vi5
SortUtil.swap(queue,1,size--); [K?
fixDown(1); StJb-K/_cL
} -`'|z+V
file://fixdown 8;gi8Y
private void fixDown(int k) { [r`KoHwdm
int j; ; $rQ
while ((j = k << 1) <= size) { 4r$#-
if (j < size %26amp;%26amp; queue[j] j++; xVPSL#>
if (queue[k]>queue[j]) file://不用交换 w>2lG3H<
break; ]y{tMC
SortUtil.swap(queue,j,k); :lai0> D
k = j; pwN2Nzski
} 'bx}[
} })OS2F
private void fixUp(int k) { x/<ow4C
while (k > 1) { *fm?"0M5
int j = k >> 1; Qm[((6}
if (queue[j]>queue[k]) i$y=tJehi
break; bkJ bnW=
SortUtil.swap(queue,j,k); .6gx|V+
k = j; ,t 2CQ
} -o+t&m
} P'VHga
)>ML7y
} &m--}
A}Iyl
} 7=fM}sk
"\*)KH`C
SortUtil： hp)>Nzdx
}#1.$a
package org.rut.util.algorithm; Z`*V9
$+PioSq
import org.rut.util.algorithm.support.BubbleSort; XtO..{qU
import org.rut.util.algorithm.support.HeapSort; ftY&Q#[
import org.rut.util.algorithm.support.ImprovedMergeSort; }!^h2)'7
import org.rut.util.algorithm.support.ImprovedQuickSort; `:lcN0n
import org.rut.util.algorithm.support.InsertSort; +(Y\w^@%H
import org.rut.util.algorithm.support.MergeSort; mywxV
import org.rut.util.algorithm.support.QuickSort; k$v7@|Aw
import org.rut.util.algorithm.support.SelectionSort; Qb@j8Xa4[
import org.rut.util.algorithm.support.ShellSort; 2- L-=0
#:" ]-u^
/** #w L(<nE
* @author treeroot I0Do%
* @since 2006-2-2 _j+,'\B
* @version 1.0 *{?2M6Z
*/ Nd>zq
public class SortUtil { s>;"bzzq
public final static int INSERT = 1; v Z10Rb8
public final static int BUBBLE = 2; Fe[6Y<x+:
public final static int SELECTION = 3; !&OdbRHM
public final static int SHELL = 4; Y<;C>Rs
public final static int QUICK = 5; wp:$Tqa$
public final static int IMPROVED_QUICK = 6; X)SUFhP\
public final static int MERGE = 7; c+{XP&g8_J
public final static int IMPROVED_MERGE = 8; ub 2'|CYw
public final static int HEAP = 9; m@nGXl'!
UP-2{zb |?
public static void sort(int[] data) { > X AB#
sort(data, IMPROVED_QUICK); =x w:@(]{
} f]1 $`
private static String[] name={ o,k#ft<
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Tyb_'|?rW
}; T\wOGaCW
x75;-q
private static Sort[] impl=new Sort[]{ 3=]/+{B
new InsertSort(), TPb&";4ROf
new BubbleSort(), a?Om;-i2`S
new SelectionSort(), JK)|a@BtOT
new ShellSort(), W{IP}mM
new QuickSort(), [ 2@Lc3<
new ImprovedQuickSort(), E2 'Al6^C
new MergeSort(), Ew}GPJ
new ImprovedMergeSort(), 6AD&%v
new HeapSort() VFV8ik)
}; w8o?wx*
sUF5Yq:9
public static String toString(int algorithm){ VII`qbxT
return name[algorithm-1]; P9\y~W
} qjfv9sU
^ &KH|qRrO
public static void sort(int[] data, int algorithm) { R7Tl1!,h
impl[algorithm-1].sort(data); fo}@B&=4
} JBQ>"X^
5YZ\@<|rH
public static interface Sort { @W+8z#xr'
public void sort(int[] data); ,,XHw;{
} w;VUP@Wm
m";8 nm
public static void swap(int[] data, int i, int j) { ~l+~MB
int temp = data; 0T3r#zQ
data = data[j]; qyyLU@hd
data[j] = temp; i_6wD
} 8Pom^QopK
} (`n*d3