[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; Re>AsnA[
} l09Fn>wa
int i1=l; u^Vh.g]
int i2=mid+1; jAXR`D
for(int cur=l;cur<=r;cur++){ _1ew(x2J
if(i1==mid+1) 5UE409Gn'
data[cur]=temp[i2++]; <$%ql'=
else if(i2>r) 9z:K1
data[cur]=temp[i1++]; T.kyV|
else if(temp[i1] data[cur]=temp[i1++]; kBo;h.[l
else GD!- qH
data[cur]=temp[i2++]; _g[-=y{Bb
} '_V #;DI
} t-WjL@$F/
tR1FO%nC
} wxE?3%.j\
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改进后的归并排序: PY?8[A+
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package org.rut.util.algorithm.support; 6JhMkB^h
@D)Z{=>{=5
import org.rut.util.algorithm.SortUtil; pV7N byb4
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/** D?^Y`G$.
* @author treeroot (ew} gJ
* @since 2006-2-2 b^x07lO
* @version 1.0 Y&K <{\vE
*/ `z9J`r=I
public class ImprovedMergeSort implements SortUtil.Sort { #;]2=@
:$?Q D
private static final int THRESHOLD = 10; iRNLKi
`?"6l5d.]
/* m[spn@SF
* (non-Javadoc) #n3ykzoqIX
* LEZ&W;bCo
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;$7v%Ls=
*/ gyev5txn
public void sort(int[] data) { Z, T#,
int[] temp=new int[data.length]; y%S})9
mergeSort(data,temp,0,data.length-1); pLnB)z?
} h./P\eDc
_1aGtX|W
private void mergeSort(int[] data, int[] temp, int l, int r) { <J&7]6Z
int i, j, k; D^+?|Y@N
int mid = (l + r) / 2; <*<U!J-i
if (l == r) z}+i=cAN
return; RP! X8~8
if ((mid - l) >= THRESHOLD) )u*^@Wo
mergeSort(data, temp, l, mid); GKZN}bOm\
else *)'Vvu<
insertSort(data, l, mid - l + 1); [k$efwJ
if ((r - mid) > THRESHOLD) oZN'HT
mergeSort(data, temp, mid + 1, r); ?'eq",c#4N
else xr[Vp
insertSort(data, mid + 1, r - mid); s9O2k}]
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for (i = l; i <= mid; i++) { jAC78n,Fi@
temp = data; d]SYP
} (?>cn_m
for (j = 1; j <= r - mid; j++) { KxIyc7.
temp[r - j + 1] = data[j + mid]; Y.sz|u 1
} ~}'F887f
int a = temp[l]; wfR&li{
int b = temp[r]; or2|O#=
for (i = l, j = r, k = l; k <= r; k++) { /:Lu_)5
if (a < b) { E7nFb:zlV
data[k] = temp[i++]; Y/fJQ6DY
a = temp; HbM0TXo
} else { l+'F_a
data[k] = temp[j--]; xq[Yg15d%
b = temp[j]; mrM4RoO
} Qhn;`9+L
} fvqd'2 t
} })Yv9],6
P`(Mk6gE
/** lr~0pL
* @param data 0 )}$^TV
* @param l X(*!2uS
* @param i L(G92,.
*/ 8Lz]Z h=ZU
private void insertSort(int[] data, int start, int len) { IRW^ok.'b!
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); V5p0h~PK
} jVWK0Zba
} qf#)lyr<D6
} poT&-Ic[
} (=u'sn:s
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堆排序： 3<:jx~y>
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package org.rut.util.algorithm.support; Y@uh[aS!
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import org.rut.util.algorithm.SortUtil; Z[?mc|*x
e,0-)?5R
/** 3n]79+w@z
* @author treeroot * F4UAQzYb
* @since 2006-2-2 :TalW~r|
* @version 1.0 UvJ;A
*/ h6v077qG
public class HeapSort implements SortUtil.Sort{ b5a.go
[f/I2
/* (non-Javadoc) -c*\o3)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) M4yI`dr6
*/ ]a'99^?\
public void sort(int[] data) { Um`!%
MaxHeap h=new MaxHeap(); W7sn+g\
h.init(data); [?0d~Q(R#
for(int i=0;i h.remove(); cU.9}-)
System.arraycopy(h.queue,1,data,0,data.length); pUYM}&dX
} (?0`d
>jg0s)RA'
private static class MaxHeap{ r! %;R?c
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void init(int[] data){ 78 f$6J q
this.queue=new int[data.length+1]; kz}R[7
for(int i=0;i queue[++size]=data; U7h(`b
fixUp(size); 3gEMRy*+
} 9=`Wp6Gmn
} p@ NaD=9
pzZk\-0R
private int size=0; #xh_
Yk!/ow@.
private int[] queue; 0RFRbi@n(
I\O\,yPhhP
public int get() { 3uWkc3
return queue[1]; 4?\:{1X=
} U8$4 R,+
Mkxi~p%<r
public void remove() { WKfkKk;G
SortUtil.swap(queue,1,size--); &7e)O=
fixDown(1); ULJmSe
} o5U(i
file://fixdown X}ma]
private void fixDown(int k) { WJH\~<{mP
int j; !]yO^Ob.E
while ((j = k << 1) <= size) { c2nKPEX&5
if (j < size %26amp;%26amp; queue[j] j++; zAzP,1$?
if (queue[k]>queue[j]) file://不用交换 mHc>"^R
break; FS6`6M.K
SortUtil.swap(queue,j,k); as yZe
k = j; {i0SS
} q?qC
} H,unpZ(
private void fixUp(int k) { I#F!N6;
while (k > 1) { w8S!%abl1
int j = k >> 1; :Qt
if (queue[j]>queue[k]) 8,P- 7^
break; dP?Ge}
SortUtil.swap(queue,j,k); fxaJZz$o
k = j; Z<[<n0o1
} !E8X~DJ
} w'MGA
V"\0Y0
} *iBTI+"]
H,3\0BKk
} OJ|r6
:}8Z@H!KkY
SortUtil： ,l YE
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package org.rut.util.algorithm; ^&@w$
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import org.rut.util.algorithm.support.BubbleSort; EP'h@zdz
import org.rut.util.algorithm.support.HeapSort; @hQlrq5c
import org.rut.util.algorithm.support.ImprovedMergeSort; Q/uwQo/
import org.rut.util.algorithm.support.ImprovedQuickSort; g- AHdYJ
import org.rut.util.algorithm.support.InsertSort; [qUN4x5b
import org.rut.util.algorithm.support.MergeSort; }D411228
import org.rut.util.algorithm.support.QuickSort; jp8@vdRg
import org.rut.util.algorithm.support.SelectionSort; -i0(2*<
import org.rut.util.algorithm.support.ShellSort; Un`^jw#_
o8/;;*
/** 4;n6I)&.(
* @author treeroot ,YTIC8qKr
* @since 2006-2-2 U$]|~41#
* @version 1.0 vE@!{*
*/ ~(!XY/0e
public class SortUtil { f`9 b*wV
public final static int INSERT = 1; 0sN.H=
public final static int BUBBLE = 2; C2LL|jp*
public final static int SELECTION = 3; An;MVA
public final static int SHELL = 4; 5pr"d@.
public final static int QUICK = 5; MYJg8 '[j
public final static int IMPROVED_QUICK = 6; _vSn`
public final static int MERGE = 7; drzL.@h|
public final static int IMPROVED_MERGE = 8; :I -V_4b
public final static int HEAP = 9; \PDd$syDA
NI#X@
public static void sort(int[] data) { NH$r Z7$
sort(data, IMPROVED_QUICK); \^ghdU
} ]8q3>
private static String[] name={ JlMT<;7\
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 7+X:LA~U
}; 4wC+S9I#E^
O"Ku1t!
private static Sort[] impl=new Sort[]{ il|1a8M2~
new InsertSort(), ~P~
new BubbleSort(), M@ed>.
new SelectionSort(), q0f3="
new ShellSort(), ^O^l(e!3
new QuickSort(), lY|Jr{+Ln
new ImprovedQuickSort(), U2uF&6v
new MergeSort(), 9Gv[8'I
new ImprovedMergeSort(), *K> l*l(f]
new HeapSort() =]:>"_jN
}; GKN%Tv:D_
!vG'J\*xc
public static String toString(int algorithm){ WVVJ
return name[algorithm-1]; f|O{#AC
} o-}R?>
$)3%U?AP
public static void sort(int[] data, int algorithm) { O@p]KSfk
impl[algorithm-1].sort(data); 311LC cRp
} :Ad&$eg+
t#q<n:WeYU
public static interface Sort { D8 hr?:I9
public void sort(int[] data); !rqF}d
} /~x"wo
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public static void swap(int[] data, int i, int j) { f B9;_z
int temp = data; KII *az
data = data[j]; 6iCrRjY*
data[j] = temp; B6wRg8
} | WvUq
} D9j3Xu