[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; QyD(@MFxb
} *1g3,NMA
int i1=l; k]9+/$
int i2=mid+1; tx,q=.(
for(int cur=l;cur<=r;cur++){ @!p0<&R@x
if(i1==mid+1) l-?#oy
data[cur]=temp[i2++]; DAf0bh"
else if(i2>r) H_FT%`iM
data[cur]=temp[i1++]; JiFB<Q\
else if(temp[i1] data[cur]=temp[i1++]; &.[I}KH|B
else <7_s'UAL!
data[cur]=temp[i2++]; ,C0D|q4/!.
} 2U@:.S'K
} =hi{J M
t_w2J=2
} dQ=L<{(
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改进后的归并排序: V)A7q9Bum
xv~Sk2Z+d
package org.rut.util.algorithm.support; /_1q)`NYy
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import org.rut.util.algorithm.SortUtil; 8,-U`.
d9q`IZqee
/** !nL>Ly
* @author treeroot KpC!C9
* @since 2006-2-2 gubw&W
* @version 1.0 @ )Nw>/;o
*/ `wKd##v'@
public class ImprovedMergeSort implements SortUtil.Sort { 6o&ZS @
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private static final int THRESHOLD = 10; G.]'pn
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/* mv>-XJ+
* (non-Javadoc) qW`DCZu
* </!GU*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) E?S
*/ ^j7>Ul,
public void sort(int[] data) { aRy" _dZ2
int[] temp=new int[data.length]; |J$Bj?
mergeSort(data,temp,0,data.length-1); ?D;7ut$~
} ca<OG;R^
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private void mergeSort(int[] data, int[] temp, int l, int r) { 17#t7Yk
int i, j, k; VI]~uTV
int mid = (l + r) / 2; QXEz[R
if (l == r) Y2[ik<
return; c!N#nt_<
if ((mid - l) >= THRESHOLD) g[N3jt@
mergeSort(data, temp, l, mid); TjicltQi4
else X}g"_wN,g>
insertSort(data, l, mid - l + 1); z&yVU<;
if ((r - mid) > THRESHOLD) Mh]4K"cs
mergeSort(data, temp, mid + 1, r); j937tn!Q
else .f&Z+MQ
insertSort(data, mid + 1, r - mid); Hi nJ}MF
T&'LQZM8
for (i = l; i <= mid; i++) { CbFO9q
temp = data; jHk.]4&0
} sKC(xO@L;`
for (j = 1; j <= r - mid; j++) { ,*8)aZ1k
temp[r - j + 1] = data[j + mid]; gO#%* W
} F},kfCFF
int a = temp[l]; kgd dq
int b = temp[r]; B]I*ymc#
for (i = l, j = r, k = l; k <= r; k++) { {t|Q9&
if (a < b) { =!u]t&yv
data[k] = temp[i++]; #j'7\SV
a = temp; l ;S_J^S
} else { )j!%`g
data[k] = temp[j--]; Cz6bD$5
b = temp[j]; .>1vN+
} ?(M$r\\
} E:Ul_m8
} e5(c,,/
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/** ^%O$7*
* @param data <Ok7-:OxA
* @param l }U?:al/m
* @param i =^z*p9ZB
*/ *onVG5<
private void insertSort(int[] data, int start, int len) { ; W$.>*O
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); .E;}.X
} R)-~5"}~
} >0?ph<h1[q
} 4kR;K!@k
} Q)\[wYMt
h{ZK;(u$
堆排序： r,q.RWuII
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package org.rut.util.algorithm.support; A4/gVi|
>:h&5@^j$
import org.rut.util.algorithm.SortUtil; lQxEiDIL
ra8AUj~RX
/** $3xDjiBb
* @author treeroot Fb ~h{
* @since 2006-2-2 9'p*7o
* @version 1.0 O"1HO[
*/ !Wj`U$];
public class HeapSort implements SortUtil.Sort{ Q.Y6
E85TCS1
/* (non-Javadoc) AoY!f'Z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) W6):IW(E
*/ rNICK2Ah
public void sort(int[] data) { 2OjU3z<J
MaxHeap h=new MaxHeap(); "]W,,A-
h.init(data); `Om W#\
for(int i=0;i h.remove(); u Yc}eMb
System.arraycopy(h.queue,1,data,0,data.length); _o&NbDH
} lT~WP)
k"E|E";B
private static class MaxHeap{ yv: Op\;R
&3SmTg %
void init(int[] data){ H9Vn(A8&`
this.queue=new int[data.length+1]; ,+X:#$
for(int i=0;i queue[++size]=data; >1HXC2 Y
fixUp(size); }"[/BT5t
} I8|"h8\
} > w SI0N
MRT<hB
private int size=0; ]Bs{9=2
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private int[] queue; "whs?^/
fcy4?SQ.<i
public int get() { /N,\st
return queue[1]; [fY7|
} k1SD{BL
?)Je%H
public void remove() { v^ v \6uEP
SortUtil.swap(queue,1,size--); At!@Rc
fixDown(1); ) )t]5Ys%;
} %'VzN3Q5V
file://fixdown J&B5Ll
private void fixDown(int k) { &Lbwx&!0b
int j; ?!.J0q
while ((j = k << 1) <= size) { bdEIvf7
if (j < size %26amp;%26amp; queue[j] j++; lqa~ZF*
if (queue[k]>queue[j]) file://不用交换 yqR]9"a
break; "sWsK %
SortUtil.swap(queue,j,k); x$FcF8
k = j; <9c{Kt.5(
} wk'&n^_br
} d. ZfK
private void fixUp(int k) { L-zU%`1{M
while (k > 1) { $LcMG,8%_
int j = k >> 1; b1G6'~U-
if (queue[j]>queue[k]) '&$zgK9T?
break; 9W-1P}e,
SortUtil.swap(queue,j,k); 8"p rWAN
k = j; |:,`dQfw
} 1H-~+lf
} N#@v`S
'8FHn~F
} .v-2A);I
r]]:/pw?t
} BK wo2=m~
s'OK])>`
SortUtil： EVE"F'Ww,_
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package org.rut.util.algorithm; e_g&L)
ux,eY
import org.rut.util.algorithm.support.BubbleSort; SLp nVD:'1
import org.rut.util.algorithm.support.HeapSort; D(WV k
import org.rut.util.algorithm.support.ImprovedMergeSort; 3{$>-d
import org.rut.util.algorithm.support.ImprovedQuickSort; Nq|y\3]
import org.rut.util.algorithm.support.InsertSort; SR_-wD
import org.rut.util.algorithm.support.MergeSort; Tt=;of{
import org.rut.util.algorithm.support.QuickSort; %a:T9v
import org.rut.util.algorithm.support.SelectionSort; @VyNe(U
import org.rut.util.algorithm.support.ShellSort; m3^D~4
mx#)iHY
/** sCp)o,;
* @author treeroot hegH^IN M
* @since 2006-2-2 ej1WkaR8
* @version 1.0 d(Hqj#`-31
*/ 0fK#:6
public class SortUtil { (:h&c6'S)b
public final static int INSERT = 1; =W>a~e]/
public final static int BUBBLE = 2; 2|U6dLZ!
public final static int SELECTION = 3; W|(<z'S
public final static int SHELL = 4; D&pX0
public final static int QUICK = 5; *SlWA)9Y
public final static int IMPROVED_QUICK = 6; D-O{/
public final static int MERGE = 7; (cV1Pmn
public final static int IMPROVED_MERGE = 8; Mm1>g~o
public final static int HEAP = 9; lHHx D
p["pGsf
public static void sort(int[] data) { a^ys7UV
sort(data, IMPROVED_QUICK); l.Z+.<@
} cr?ZXu_
private static String[] name={ edZBQmx+#
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" %(H' j@D[
}; C~'.3Q6
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private static Sort[] impl=new Sort[]{ de[NIDA;`
new InsertSort(), 0-57_";%Q
new BubbleSort(), zQUNvPYM
new SelectionSort(), P"Z1K5>2L
new ShellSort(), '@IReMl
new QuickSort(), 2=%]Ax"R
new ImprovedQuickSort(), fhNJB0
new MergeSort(), !89hO4 0r
new ImprovedMergeSort(), gvL*]U7
new HeapSort() S,f#g?V
}; woF{O)~X
)J2UNIgN
public static String toString(int algorithm){ ~=<uYv?0s
return name[algorithm-1]; Cv4nl7A'
} sP~xe(
/CbiYm
public static void sort(int[] data, int algorithm) { ,]y_[]636
impl[algorithm-1].sort(data); J aJ/|N
} e AaS }g 0
+}:2DXy@
public static interface Sort { 3df5 e0
public void sort(int[] data); '-$cvH7_
} Y"nz l]T
I]3!M`IMG
public static void swap(int[] data, int i, int j) { 4vkqe6
int temp = data; ?sR(
data = data[j]; W@zuN)U
data[j] = temp; !1A< jL
} L"0?g(< 5
} fN:FD`