[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; 0fvQPs!O
} 6h N~<
int i1=l; @18"o"c7j
int i2=mid+1; #&.&Uu$
for(int cur=l;cur<=r;cur++){ d:0RDK-}s
if(i1==mid+1) AElx #`T
data[cur]=temp[i2++]; +dm&XW >
else if(i2>r) pmyHto"
data[cur]=temp[i1++]; J/j1Yf'9
else if(temp[i1] data[cur]=temp[i1++]; I)ub='+&;
else wVBY^TE
data[cur]=temp[i2++]; e-4XNL[F
} ~R.8r-kD`
} B&0^3iKFi
w:Fi 2aJ
} 8uoFV=bj\
pez^]I
改进后的归并排序: %3'4QmpR
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package org.rut.util.algorithm.support; 9Ot;R?>(
U">D_ 8
import org.rut.util.algorithm.SortUtil; TX]4Y953D
aG?ko*A;
/** SoODss~X
* @author treeroot i^(_Gk
* @since 2006-2-2 @.fuR#
* @version 1.0 e*uaxh+7
*/ OiX>^_iDt
public class ImprovedMergeSort implements SortUtil.Sort { 2q J}5
$}<+~JpGfP
private static final int THRESHOLD = 10; wJJ4F$"b
BQv+9(:fQB
/* FG7}MUu
* (non-Javadoc) s+>""yi
* _`WbR&d2Id
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) * B,D#;6
*/ fGJPZe
public void sort(int[] data) { k oo`JHC
int[] temp=new int[data.length]; 3ik
mergeSort(data,temp,0,data.length-1); 4VPL -":6
} @`aR*B
IpY R
private void mergeSort(int[] data, int[] temp, int l, int r) { \4I1wdd|^
int i, j, k; 9iWDEk
int mid = (l + r) / 2; $j^Jj
if (l == r) goi.'8M|/b
return; <CJua1l\
if ((mid - l) >= THRESHOLD) gF1qZ=<
mergeSort(data, temp, l, mid); vpx8GiV
else AwB ]0H
insertSort(data, l, mid - l + 1); 1?"vKm
if ((r - mid) > THRESHOLD) S =q.Y
mergeSort(data, temp, mid + 1, r); 3q
else [AQ6ads)
insertSort(data, mid + 1, r - mid); +ex@[grsGT
Mn$TWhg'
for (i = l; i <= mid; i++) { Nh~ Hh(
temp = data; b9[;qqq@'
} QJp _>K
for (j = 1; j <= r - mid; j++) { 9 )u*IGj
temp[r - j + 1] = data[j + mid]; d<. hkNN
} CfQOG7e@
int a = temp[l]; 8Wid.o-U
int b = temp[r]; 4H8vB^
for (i = l, j = r, k = l; k <= r; k++) { F{ J>=TC
if (a < b) { =:[Jz1M5
data[k] = temp[i++]; Z5;1ySn{
a = temp; ex7zg!
} else { vmL%%7
data[k] = temp[j--]; 4&)*PKq
b = temp[j]; _)Q)tOW
} %TxFdF{A
} ws Lg6
} t>f<4~%MJ
Ojq>4=Z\
/** n[lf==R
* @param data ZO{uG(u
* @param l E~_2Jf\U
* @param i \%=\_"^?
*/ [Rw0']i`4
private void insertSort(int[] data, int start, int len) { x;S v&
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ]p:x,%nm
} F"VNz^6laV
} ,i#]&f`c;5
} 7kO5hlKeo
} Ji4c8*&Jpc
:pcKww|V
堆排序： q.FgX
{o< 4 ^
package org.rut.util.algorithm.support; |/C>xunzz
1.!rq,+>1
import org.rut.util.algorithm.SortUtil; GrjL9+|x
|;ycEB1
/** F.ryeOJ
* @author treeroot 23@e?A=C
* @since 2006-2-2 e*jt(p[Ge
* @version 1.0 &\4AvaeA8y
*/ e@*Gnh<&
public class HeapSort implements SortUtil.Sort{ YUJlQ2e(
Lw\ANku
/* (non-Javadoc) .5|AX6p+^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) D{I^_~-\5
*/ Ox.&tW%@
public void sort(int[] data) { 2+ F34
MaxHeap h=new MaxHeap(); +b1(sk=4z
h.init(data); 2-j+-B|i
for(int i=0;i h.remove(); rcMVYSj0
System.arraycopy(h.queue,1,data,0,data.length); 55MsF}p
} %@3AA<
'm}K$h(U
private static class MaxHeap{ 4_3Jpz*
1s8v E f
void init(int[] data){ JDfkm+}uY
this.queue=new int[data.length+1]; ?Z {4iF
for(int i=0;i queue[++size]=data; ;X-~C.7k
fixUp(size); qEPvV
} ;0O3b
} trnjOm
&H$ 3`"p5u
private int size=0; )a.Y$![
9KRHo%m
private int[] queue; Ac'[(
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public int get() { A\iDK10Q$
return queue[1]; a'U7 t
} >[B}eS>
IlG)=?8XZ
public void remove() { V$%%nG uE
SortUtil.swap(queue,1,size--); w'z?1M(*
fixDown(1); "_]n_[t2C
} J*$u
file://fixdown W&ya_iP~C
private void fixDown(int k) { MKLntX
int j; ^ }Rqe
while ((j = k << 1) <= size) { p0~=
if (j < size %26amp;%26amp; queue[j] j++; )kR~|Yn<-
if (queue[k]>queue[j]) file://不用交换 #-dfG.*
break; i71,
SortUtil.swap(queue,j,k); md:$OC3
k = j; By(:%=.
} ,L%\{bp5
} ?F]Yebp^
private void fixUp(int k) { :L#t?~
while (k > 1) { RQ}(}|1+\
int j = k >> 1; q+f]E&':
if (queue[j]>queue[k]) H_KE^1
break; 5_Yl!=
SortUtil.swap(queue,j,k); Yn4c6K
k = j; </F@5*
} ~L(=-B`Ow
} yPrp:%PS
lG12Su/
} V{@ xhW0
wU,{5w
} P.Pw.[:3
w6DK&@w`'/
SortUtil： |P7c {
s$`g%H>
package org.rut.util.algorithm; jV Yt=j*"V
KD?~ hpg
import org.rut.util.algorithm.support.BubbleSort; )w];eF0c
import org.rut.util.algorithm.support.HeapSort; l<5O\?Vo]
import org.rut.util.algorithm.support.ImprovedMergeSort; :acnrW>i[@
import org.rut.util.algorithm.support.ImprovedQuickSort; {Ts@#V=:
import org.rut.util.algorithm.support.InsertSort; dd1m~Gm
import org.rut.util.algorithm.support.MergeSort; 6OR5zXpk
import org.rut.util.algorithm.support.QuickSort; CqX2R:#
import org.rut.util.algorithm.support.SelectionSort; lxoc.KDtR
import org.rut.util.algorithm.support.ShellSort; ModwJ w
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/** #PUvrA2Zl
* @author treeroot pFi.?|6"
* @since 2006-2-2 Y: &?xR
* @version 1.0 "&?F6Pi
*/ Qj: D=j8
public class SortUtil { 2?YN8 n9n
public final static int INSERT = 1; 2|]$hjs
public final static int BUBBLE = 2; }Kc[pp|9<
public final static int SELECTION = 3; N:'v^0
public final static int SHELL = 4; T|^rFaA
public final static int QUICK = 5; (dD+?ZOO
public final static int IMPROVED_QUICK = 6; *A C){M
public final static int MERGE = 7; kbzzage6L
public final static int IMPROVED_MERGE = 8; z=1 J{]
public final static int HEAP = 9; hJY= )
N*z_rZE
public static void sort(int[] data) { JU+Uzp
sort(data, IMPROVED_QUICK); B:S/ ?v
} ({ 'I;]AQ
private static String[] name={ K{)N:|y%!$
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" x95[*[
}; (|%YyRaX
\jLn5$OW
private static Sort[] impl=new Sort[]{ m<L.H33'
new InsertSort(), v0euvs
new BubbleSort(), gi!{y
new SelectionSort(), S <~"\<ED
new ShellSort(), SrGX4
new QuickSort(), |uo<<-\jTO
new ImprovedQuickSort(), !f5I.r~
new MergeSort(), =d>^q7s
new ImprovedMergeSort(), \49LgN@\
new HeapSort() 1L722I@
}; "@: b'm
ZuZe8&
public static String toString(int algorithm){ )>,; GVu"
return name[algorithm-1]; j2O?]M
} <=WSX{_D
0<f\bY02
public static void sort(int[] data, int algorithm) { ioxsx>e<
impl[algorithm-1].sort(data); <aps)vF
} 57r?`'#*
Q/[|/uNw?
public static interface Sort { _SU%ul
public void sort(int[] data); I*cB Ha
} 7hAFK
#wz1uw[pI!
public static void swap(int[] data, int i, int j) { YC!Tgb~H
int temp = data; qK}4r5U
data = data[j]; l)y$c}U
data[j] = temp; t(3<w)r2
} lq0@)'D
} Y rq-(