[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; ;~1JbP
} w'XgW0j{
int i1=l; efR$s{n!
int i2=mid+1; n#cN[C9
for(int cur=l;cur<=r;cur++){ qT @IY)e
if(i1==mid+1) f tDV3If
data[cur]=temp[i2++]; k;7.qhe:
else if(i2>r) >IjLFM+U
data[cur]=temp[i1++]; <LN$[&f#
else if(temp[i1] data[cur]=temp[i1++]; T%/w^27E
else hM w`e
data[cur]=temp[i2++]; o+TZUMm
} c"1d#8J
} p\S3A(
K67? d
} nDy=ZsK
koZp~W-
改进后的归并排序: p04+"
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package org.rut.util.algorithm.support; G- WJlu
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import org.rut.util.algorithm.SortUtil; It-*CD9
LP /4e`
/** fM.|#eLi
* @author treeroot A!yLwkc:5
* @since 2006-2-2 s#ZH.z@J
* @version 1.0 IOl"Xgn5
*/ 7gcG|kKT
public class ImprovedMergeSort implements SortUtil.Sort { 'O9=*L)X
@x +#ZD(
private static final int THRESHOLD = 10; / u6$M/Cf>
;bE6Y]"Rz
/* B$EP'5@b
* (non-Javadoc) cyg>hX{U
* 89mre;v`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) eCD,[At/
*/ HC,@tfS
public void sort(int[] data) { f@L{*Upj+
int[] temp=new int[data.length]; b%j:-^0V
mergeSort(data,temp,0,data.length-1); BwD1}1jp
} P^W47 SO
|>GIPfVT
private void mergeSort(int[] data, int[] temp, int l, int r) { H%aLkV!J
int i, j, k; ;(6lN<iU
int mid = (l + r) / 2; |3ETF|)?
if (l == r) DjvgKy=Jr_
return; B)8Hj).@B
if ((mid - l) >= THRESHOLD) vI}S6-"<
mergeSort(data, temp, l, mid); k]pD3.QJ
else 1s[-2^D+EM
insertSort(data, l, mid - l + 1); 'U$VOq?!
if ((r - mid) > THRESHOLD) W=]",<
mergeSort(data, temp, mid + 1, r); z-gG(
else ZNeqsN{
insertSort(data, mid + 1, r - mid); \;gt&*$-
pUGfm
for (i = l; i <= mid; i++) { P@`"MNS
temp = data; f om"8iL1
} e}AJxBE
for (j = 1; j <= r - mid; j++) { X(28xbd|
temp[r - j + 1] = data[j + mid]; ;NeEgqW"
} MiM=fIuw@s
int a = temp[l]; ][#*h`I
int b = temp[r]; m]q!y3
for (i = l, j = r, k = l; k <= r; k++) { 6qpV53H
if (a < b) { $VIq)s2az|
data[k] = temp[i++]; >Fk`h=Wd
a = temp; Gi4dgMVei
} else { v=-3 ,C
data[k] = temp[j--]; Qp&ySU8
b = temp[j]; h xJgxM
} o;_bs~}y
} N~_jiVD>
} Cbs4`D,
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/** Y_hRL&u3W
* @param data wQB{K3
* @param l N2s%p6RMPD
* @param i 6'!{0 5=m
*/ R9G)X]
private void insertSort(int[] data, int start, int len) { 9yw/-nA
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); pu*u[n
} 8w?\_P7QA
} ;I71_>m
} MPy][^s!
} 5THS5'
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堆排序： K(fLqXE%
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package org.rut.util.algorithm.support; bv>lm56
bTp2)a^G
import org.rut.util.algorithm.SortUtil; a;(zH*/XK
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/** \[I .
* @author treeroot $=xQX
* @since 2006-2-2 ~<OjXuYu
* @version 1.0 i/~QJ1C
*/ h^$}1[
public class HeapSort implements SortUtil.Sort{ 2BA9T nxC
1y-lZ}s_
/* (non-Javadoc) aW-o=l@;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) G5y
*/ cGzYW~K
public void sort(int[] data) { @Qjl`SL%O^
MaxHeap h=new MaxHeap(); slvs oN@
h.init(data); e -]c
for(int i=0;i h.remove(); &dDI*v+
System.arraycopy(h.queue,1,data,0,data.length); _Ge^ -7
} 5=h'!|iY
1$D`Z/N"A
private static class MaxHeap{ ;s.5\YZ"k
Q1\k`J
void init(int[] data){ =C>`}%XT}
this.queue=new int[data.length+1]; 39aCwhh7v
for(int i=0;i queue[++size]=data; ^~<Rzq!
fixUp(size); n!eqzr{
} [aZ v?Z
} &Yf#O*
bZay/ Zkj
private int size=0; Hu(flc+z"
A~GtK\=;
private int[] queue; K M\+
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public int get() { rjAkpAT
return queue[1]; kbp( a+5
} ={E!8"
ml33qXW:
public void remove() { ^&';\O@)
SortUtil.swap(queue,1,size--); ;.Oh88|k
fixDown(1); Xtu`5p_Qv
} mn; 7o~4
file://fixdown H"q`k5R
private void fixDown(int k) { n &\'Hm
int j; J6( RlHS;
while ((j = k << 1) <= size) { y.*=Ww+
if (j < size %26amp;%26amp; queue[j] j++; 7?!Z+r
if (queue[k]>queue[j]) file://不用交换 -Xxu/U})%
break; k4F"UG-`
SortUtil.swap(queue,j,k); IgiF,{KE,
k = j; DR yESi
} 2~&hstd%
} x\J;ZiWwW
private void fixUp(int k) { qM1)3.)[:
while (k > 1) { V)1:LLRW
int j = k >> 1; zdjM%l);
if (queue[j]>queue[k]) {~p7*j^0
break; "?eH=!
SortUtil.swap(queue,j,k); cR=94i=t
k = j; =yTa,PY
} `zzKD2y
} FSU%?PxO
0ve`
} a?,[w'7FU
Y=:KM~2hv
} n,?IcDU~m
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SortUtil： 4Ay`rG
R7B,Q(q2-
package org.rut.util.algorithm; :e&n.i^
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import org.rut.util.algorithm.support.BubbleSort; u JQaHL!
import org.rut.util.algorithm.support.HeapSort; Y1fy2\<'
import org.rut.util.algorithm.support.ImprovedMergeSort; @k+%y'Y?
import org.rut.util.algorithm.support.ImprovedQuickSort; q M_/
import org.rut.util.algorithm.support.InsertSort; ne"?90~
import org.rut.util.algorithm.support.MergeSort; x!C8?K=|
import org.rut.util.algorithm.support.QuickSort; M<Wn]}7!
import org.rut.util.algorithm.support.SelectionSort; .@i0U
import org.rut.util.algorithm.support.ShellSort; eg2U+g4
+=6RmId+X
/** {C/L5cZ]J
* @author treeroot wTlK4R#
* @since 2006-2-2 ;J(rw
* @version 1.0 &}nBenYp
*/ !]rETP_
public class SortUtil { :>P4L,Da]
public final static int INSERT = 1; 8Q^6ibE
public final static int BUBBLE = 2; +^4BO`
public final static int SELECTION = 3; 5oU`[&=Ob
public final static int SHELL = 4; 9|N"@0<B
public final static int QUICK = 5; R81{<q'%X
public final static int IMPROVED_QUICK = 6; 5@+4
public final static int MERGE = 7; crJ7pe9
public final static int IMPROVED_MERGE = 8; f2O*8^^Y{Q
public final static int HEAP = 9; zNV!@Yr
z/Ns5
public static void sort(int[] data) { M[YTk=IM#
sort(data, IMPROVED_QUICK); QE45!Zg
} *2,e=tY>
private static String[] name={ 3!.H^v?
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 't|Un G
}; .~.``a
pHen>BA[
private static Sort[] impl=new Sort[]{ RIy5ww}3|
new InsertSort(), s&dO/}3uR]
new BubbleSort(), MX!u$ei
new SelectionSort(), "U%n0r2
new ShellSort(), EjR_-8@FK
new QuickSort(), CxbSj,
new ImprovedQuickSort(), yn/?= ?0
new MergeSort(), I*A0?{
new ImprovedMergeSort(), 3Q'[Ee2-3
new HeapSort() }W:*aU
}; 9Z,*h-o
{W5ydHXy
public static String toString(int algorithm){ bJQ5- *F
return name[algorithm-1]; AT B\^;n.
} cOSxg=~>u
eyeNrk*2o
public static void sort(int[] data, int algorithm) { [G{rHSK5tQ
impl[algorithm-1].sort(data); CM%|pB/z
} r}/yi
V$/u
public static interface Sort { Em e'Gk
public void sort(int[] data); Sl3KpZ
} Gb(C#,xbK
$Wit17j
public static void swap(int[] data, int i, int j) { r]A"Og_U
int temp = data; }P<Qz^sr_
data = data[j]; 1~}m.ER
data[j] = temp; yZYKwKG
} (^sh
} L`9TB"0R+