[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; .ZTvOm'mB^
} Ez3fL&*
int i1=l; z$~x 2<
int i2=mid+1; F9K%f&0 a
for(int cur=l;cur<=r;cur++){ xye-Z\-t
if(i1==mid+1) gjS|3ED
data[cur]=temp[i2++]; '!HTE`Aj
else if(i2>r) Ds9)e&yYrb
data[cur]=temp[i1++]; `2lS@
else if(temp[i1] data[cur]=temp[i1++]; K"#$",}=
else (Ou%0 KW
data[cur]=temp[i2++]; ;Shu
} lA^1}
} _D '(R
[&)]-2w2
} 5\mRH
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改进后的归并排序: ARH~dN*C
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package org.rut.util.algorithm.support; ,;k+n)
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import org.rut.util.algorithm.SortUtil; O)'CU1vMb
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/** #N|\7(#~u
* @author treeroot OF-k7g7
* @since 2006-2-2 g`Z=Y7jLH
* @version 1.0 RRL{a6(?
*/ '6so(>|
public class ImprovedMergeSort implements SortUtil.Sort { z0z@LA4k6@
8=8hbdy;
private static final int THRESHOLD = 10; -+R,="nRQ
8&<mg;H,
/* afm\Iv[*
* (non-Javadoc) LEb$Fd
* s,z~qL6&
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) gq=t7b
*/ *1|7%*!8
public void sort(int[] data) { vy<W4
int[] temp=new int[data.length]; +|A`~\@N
mergeSort(data,temp,0,data.length-1); 9vI~vl l
} 56v G R(
amBg<P`'_
private void mergeSort(int[] data, int[] temp, int l, int r) { !/FRL<mp
int i, j, k; \J'}CX*aQ
int mid = (l + r) / 2; ohx[_}xN
if (l == r) t{md&k4
return; TW|K.t@5#H
if ((mid - l) >= THRESHOLD) ^Q/*on;A,/
mergeSort(data, temp, l, mid); [+ud7l
else $8tk|uh
insertSort(data, l, mid - l + 1); (s};MdXIz
if ((r - mid) > THRESHOLD) ,AP&N'
mergeSort(data, temp, mid + 1, r); qZ1'uln=C-
else )6"}M;v
insertSort(data, mid + 1, r - mid); )Z7Vm2a
2]!@)fio`
for (i = l; i <= mid; i++) { xS*UY.>
temp = data; u]p21)m$x
} d:kB Zrq
for (j = 1; j <= r - mid; j++) { ?UnQ?F(+G<
temp[r - j + 1] = data[j + mid]; Jf YgZ\#
} rH@Rh}#yp
int a = temp[l]; \8vP"Kr
int b = temp[r]; a4Q@sn;]
for (i = l, j = r, k = l; k <= r; k++) { O1c%XwMn^
if (a < b) { !fOPYgAGKn
data[k] = temp[i++]; epy2}TI
a = temp; zsL@0]e&
} else { D|uvgu2
data[k] = temp[j--]; rXx#<7`
b = temp[j]; ,\4]uZ<
} c_8&4
} ZW4f "
} e~)[I!n
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/** ug3\K83aj/
* @param data a5*r1,
* @param l +%dXB&9x|Z
* @param i \xYVnjG,
*/ 4Aj~mA
private void insertSort(int[] data, int start, int len) { SNj-h>&Mha
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 4XkI? l
} @16GF!.
} )Sn0Y B
} k{' ZaP)
} f$I=oN
{ I#>6
堆排序： 65EMB%
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package org.rut.util.algorithm.support; YT(N][V
kx,.)qKk
import org.rut.util.algorithm.SortUtil; =p5DT
]#:WL)@
/** mxNd_{n
* @author treeroot K%q5:9m
* @since 2006-2-2 rc_m{.b
* @version 1.0 M @5&.
*/ ]!/
public class HeapSort implements SortUtil.Sort{ J0xHpe
&@iOB #H
/* (non-Javadoc) nFnM9 pdMK
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;;0'BdsL`
*/ |UTajEL
public void sort(int[] data) { o1AbB?%=
MaxHeap h=new MaxHeap(); l=DF)#>w
h.init(data); AtQ.H-8r
for(int i=0;i h.remove(); $*q|}Tvl#
System.arraycopy(h.queue,1,data,0,data.length); :ld~9
} {'b;lA]0
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private static class MaxHeap{ )/RG-L
4'QX1p
void init(int[] data){ uw;Sfx,s
this.queue=new int[data.length+1]; VF`!ks
for(int i=0;i queue[++size]=data; fyQOF ItM
fixUp(size); (b25g!
} sN41Bz$q.
} y4-kuMYR
B;k'J:-"
private int size=0; Q'OtXs 80
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private int[] queue; $1yy;IyR
]az(w&vqg2
public int get() { {4J.
return queue[1]; U1 _"D+XB
} VbX P7bZ
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public void remove() { )eZK/>L&
SortUtil.swap(queue,1,size--); ocGrB)7eD
fixDown(1); dl4n-*h
} DU^.5f
file://fixdown u*C*O4f>OC
private void fixDown(int k) { M7=,J;@
int j; u8-6s+ O
while ((j = k << 1) <= size) { c p"K?)
if (j < size %26amp;%26amp; queue[j] j++; gUklP(T=u
if (queue[k]>queue[j]) file://不用交换 K(;qdIr
break; pGs?Y81
SortUtil.swap(queue,j,k); 4*XNk;Dx
k = j; s= %3`3Fo
} KqI:g*H'x7
} w6BBu0,KC
private void fixUp(int k) { Rqe.=+Qs
while (k > 1) { xfRp_;l+R
int j = k >> 1; ^KhJBM/Z
if (queue[j]>queue[k]) Y`g oV
break; :\^b6"}8
SortUtil.swap(queue,j,k); SkjG}
k = j; 2uj .*
} HE&)N clY
} DTO_IP
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} ~/rD_K
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} VrIN.x
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SortUtil： $@PruY3[
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package org.rut.util.algorithm; $;^|]/-
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import org.rut.util.algorithm.support.BubbleSort; s#^0[ Rt
import org.rut.util.algorithm.support.HeapSort; tVG;A&\,6
import org.rut.util.algorithm.support.ImprovedMergeSort; i-|N6J
import org.rut.util.algorithm.support.ImprovedQuickSort; 7yE\,
import org.rut.util.algorithm.support.InsertSort; z~t0l
import org.rut.util.algorithm.support.MergeSort; VeQGdyhY
import org.rut.util.algorithm.support.QuickSort; \5a.JfF
import org.rut.util.algorithm.support.SelectionSort; UFj H8jSBx
import org.rut.util.algorithm.support.ShellSort; /43l}6I
e]~p:
/** }m+Q(2
* @author treeroot #D9.A7fCc5
* @since 2006-2-2 $gr>Y2i
* @version 1.0 i^DMnvV.
*/ [FBS|v#T
public class SortUtil { NK0'\~7&
public final static int INSERT = 1; 7r;16"
public final static int BUBBLE = 2; J4+K)gWB
public final static int SELECTION = 3; ]'5Xjcx
public final static int SHELL = 4; KElEGW
public final static int QUICK = 5; {Z2nc)|7C
public final static int IMPROVED_QUICK = 6; CcQc!`YC
public final static int MERGE = 7; )0/9 L
public final static int IMPROVED_MERGE = 8; /9br&s$B
public final static int HEAP = 9; lC($@sC%
m!ZY]:)$
public static void sort(int[] data) { bMKX9`*o
sort(data, IMPROVED_QUICK); YE`Y t
} 7qqzL_d>
private static String[] name={ 8KJUC&`
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" :i&]J$^;
}; ,7d/KJ^7
S<7!<]F-
private static Sort[] impl=new Sort[]{ e]VW\6J&
new InsertSort(), c^I^jg2v
new BubbleSort(), Bz/ba *
new SelectionSort(), 7(}'jZ
new ShellSort(), Y"lEMY
new QuickSort(), PhyIea
new ImprovedQuickSort(), rt^~ I\V
new MergeSort(), BL&AZv/T
new ImprovedMergeSort(), v@EErF
new HeapSort() 3CD#OCz7&
}; yeiIP
x$q}lJv_
public static String toString(int algorithm){ z)M#9oAM
return name[algorithm-1]; 'I>USl3hI
} 9)wYSz'
sSU|N;"Y
public static void sort(int[] data, int algorithm) { wG49|!l6T
impl[algorithm-1].sort(data); 254V)(t^QM
} #@oB2%&X?
VpJKH\)Rt(
public static interface Sort { b? o
public void sort(int[] data); p6%Vf
} O14QlIk
Z"VP<-
public static void swap(int[] data, int i, int j) { U~D~C~\2;
int temp = data; 'Q=;I
data = data[j]; uE.BB#
data[j] = temp; _M%>Qm
} Z3&}C h
} wp@_4Iq1$