[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; 0-M.>fwZ=
} \b95CU
int i1=l; .K]n<+zW
int i2=mid+1; .:A9*,
for(int cur=l;cur<=r;cur++){ bCHJLtDQ
if(i1==mid+1) m/Ou$
data[cur]=temp[i2++]; cK%Sty'8+
else if(i2>r) xa5^h]o
data[cur]=temp[i1++]; i2j_=X-
else if(temp[i1] data[cur]=temp[i1++]; m^Qc9s#D
else \2KwF}[m
data[cur]=temp[i2++]; 48vKUAzx`
} S+ gzl#r
} )ZC0/>R
BF{v0Z0/}k
} FBJw (.Jr
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改进后的归并排序: -L%tiz`_
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package org.rut.util.algorithm.support; w/BaaF.0
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import org.rut.util.algorithm.SortUtil; -7,xjn
;*>Y8^K&Q
/** EVZuwbO)|
* @author treeroot &o%IKB@
* @since 2006-2-2 j;6kN-jx
* @version 1.0 21Mr2-#z
*/ *WdnP.'Y
public class ImprovedMergeSort implements SortUtil.Sort { qIIc>By(\"
FC[8kq>Hk
private static final int THRESHOLD = 10; `1k0wT(
,7-@eZ
/* r#hA kOw
* (non-Javadoc) YaU)66=u
* vncLB&@7
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) DdDwMq
*/ @c,Qj$\1
public void sort(int[] data) { fGS5{dti
int[] temp=new int[data.length]; 'qel3Fs"
mergeSort(data,temp,0,data.length-1); kEiWE|
} $fZVh%
6+`+$s0
private void mergeSort(int[] data, int[] temp, int l, int r) { _=l8e-6r
int i, j, k; n1n->l*HGP
int mid = (l + r) / 2; R@zl?>+
if (l == r) xNDX(_U>\
return; f/+UD-@%m
if ((mid - l) >= THRESHOLD) OwRH :l
mergeSort(data, temp, l, mid); 7HfA{.|m
else L *",4!
insertSort(data, l, mid - l + 1); bit@Kv1<C
if ((r - mid) > THRESHOLD) ]$7dkP
mergeSort(data, temp, mid + 1, r); 4:m/w!q$
else d0ZbusHHb
insertSort(data, mid + 1, r - mid); QE8;Jk-
)2vkaR
for (i = l; i <= mid; i++) { p+6L qk<
temp = data; P(h[QAM
} ))Q3;mI"
for (j = 1; j <= r - mid; j++) { K`%{(^}.
temp[r - j + 1] = data[j + mid]; C.su<B?
} ,Hq*zc c
int a = temp[l]; cvSr><(
int b = temp[r]; O$SQzLZx&
for (i = l, j = r, k = l; k <= r; k++) { q8 jI y@
if (a < b) { Igb@aGA
data[k] = temp[i++]; hHXTSk2
a = temp; (.D|%P
} else { BuwJR Ql.
data[k] = temp[j--]; 3hUU$|^4gm
b = temp[j]; ]H[%PQ r`Z
} :x*#RnRr.
} U42B(ow
} ? }t[
{Ee[rAVGp
/** lJ y\Ky(*
* @param data A\xvzs.d
* @param l *Y"j 0Yob
* @param i f\cm84
*/ v>ygr8+C,
private void insertSort(int[] data, int start, int len) { [&_c.ti
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); #ArMX3^+w7
} d4(!9O.\
} w+MCOAB
} !u0|{6U
} (zv)cw%
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堆排序： C{gY*+
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package org.rut.util.algorithm.support; <Wz+f+HC
)2lzPK t
import org.rut.util.algorithm.SortUtil; ?|}%A9
P/9iB/
/** hlIh(\JZ4s
* @author treeroot ~:PuKx
* @since 2006-2-2 ?U^h:n
* @version 1.0 fwWE`BB
*/ j)A$%xUo
public class HeapSort implements SortUtil.Sort{ vJ`'x
b!do7%]i
/* (non-Javadoc) `y%1K|Y=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) fQ.{sQ$@h
*/ |~V`Es +j
public void sort(int[] data) { '5V#sq;Z
MaxHeap h=new MaxHeap(); m`3Mev
h.init(data); g#Doed.30=
for(int i=0;i h.remove(); Lc0yLm
System.arraycopy(h.queue,1,data,0,data.length); /C: rr_4=
} 9bE/7v
}iu(-{Z
private static class MaxHeap{ 97XGJ1HI
Td|x~mZv:
void init(int[] data){ P. V #
this.queue=new int[data.length+1]; qjc8$#zXS
for(int i=0;i queue[++size]=data; qYi<GI*|@
fixUp(size); ;R#:? r;t
} Q|3SYJf
} @-g'BvS
k-~HUC.A.
private int size=0; !"dn!X
F|ib=_)3
private int[] queue; $IdY(f:.:5
wlY6h4c
public int get() { kJy bA
return queue[1]; 71$MhPvd<
} i*q!|^M
c2$&pZ M
public void remove() { A&dNCB
SortUtil.swap(queue,1,size--); {1jywb }
fixDown(1); #c2InwZV
} P0/B!8x
file://fixdown *,Mg
private void fixDown(int k) { Xy;!Q`h(
int j; Z T5p
while ((j = k << 1) <= size) { 6Eu&%`
if (j < size %26amp;%26amp; queue[j] j++; m{ya%F
if (queue[k]>queue[j]) file://不用交换 ^Z9v_qB
break; =z]8;<=pL
SortUtil.swap(queue,j,k); JW`Kh*,~<
k = j; 4 Ii@_r>
} XIrNT:h4
} &;V3[ *W"
private void fixUp(int k) { |>Xw"]b;
while (k > 1) { TYs#v/)I
int j = k >> 1; .x^`y2'U
if (queue[j]>queue[k]) %5zztReI
break; 9gz"r
SortUtil.swap(queue,j,k); qtv>`:neB
k = j; FyZiiH4|
} zF F=v7[j
} limzDQ^
1f.xZgO/2
} o4Bl!7U
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} ,Cj8{s&;
l5jW`cl1
SortUtil： v7l4g&
}PR^Dj.
package org.rut.util.algorithm; K%p*:P
/&+6nOP
import org.rut.util.algorithm.support.BubbleSort; SwDUg}M~
import org.rut.util.algorithm.support.HeapSort; {mlJE>~%
import org.rut.util.algorithm.support.ImprovedMergeSort; i>M*ubWE4@
import org.rut.util.algorithm.support.ImprovedQuickSort; :EUV#5V.
import org.rut.util.algorithm.support.InsertSort; .%@=,+nqz
import org.rut.util.algorithm.support.MergeSort; oc2aE:>X
import org.rut.util.algorithm.support.QuickSort; x%;Q /7&$
import org.rut.util.algorithm.support.SelectionSort; UJ0Dy` f
import org.rut.util.algorithm.support.ShellSort; Qbc62qFu!
L-ZJ[#D
/** EmDA\9~@R
* @author treeroot mQ9%[U,
* @since 2006-2-2 \E'Nk$V3
* @version 1.0 D4"](RXH
*/ h=3156M
public class SortUtil { `R}D@
public final static int INSERT = 1; +njE
public final static int BUBBLE = 2; oadlyqlw#
public final static int SELECTION = 3; =](c7HEQf
public final static int SHELL = 4; kUJ\AK
public final static int QUICK = 5; GQ-owH]
public final static int IMPROVED_QUICK = 6; #0-!P+c[
public final static int MERGE = 7; JuGQS24
public final static int IMPROVED_MERGE = 8; *5i~N}
public final static int HEAP = 9; $E^#DjhRQ3
35Jno<TP'
public static void sort(int[] data) { AJ;Y Nb
sort(data, IMPROVED_QUICK); Y[Gw<1F_
} RRD\V3C84
private static String[] name={ ^"w.v' sL
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 3q:-98DT
}; ifu"e_^
l|-TGjsX
private static Sort[] impl=new Sort[]{ X7sWu{n
new InsertSort(), tPS.r.0#^
new BubbleSort(), ksxacRA7\
new SelectionSort(), `p&ko$i2
new ShellSort(), >#@1 I
new QuickSort(), -(n[^48K
new ImprovedQuickSort(), |Hbe]2"x>
new MergeSort(), cJ&e^$:Er
new ImprovedMergeSort(), Ii?"`d+JA
new HeapSort() .P=uR8
}; 9?*BN\E5S
O_f|R1G5z
public static String toString(int algorithm){ /$hfd?L
return name[algorithm-1]; `d=$9Pi
} PL8{|Q
~Exd_c9
public static void sort(int[] data, int algorithm) { KJa?TwnC
impl[algorithm-1].sort(data); ?ng?>!
} 7"f$;CN?~
`07u}]d8
public static interface Sort { fB5Bh;K
public void sort(int[] data); `4cs.ab
} r'hr'wZ
#R|M(Z">q
public static void swap(int[] data, int i, int j) { laM0W5
int temp = data; Tk-PCra
data = data[j]; ?lb1K'(
data[j] = temp; Gvt.m&_
} *seKph+'c
} KQ/v](77