[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; ocS5SB]8
} -"60d @.
int i1=l; H6 HVu |
int i2=mid+1; }"!I[Ek> y
for(int cur=l;cur<=r;cur++){ q\p:X"j|
if(i1==mid+1) tQYM&6g
data[cur]=temp[i2++]; ILShd)]Rw
else if(i2>r) RcU}}V
data[cur]=temp[i1++]; t+T4-1 3a
else if(temp[i1] data[cur]=temp[i1++]; dZ0vA\z|
else o;<Xo&
data[cur]=temp[i2++]; bsA-2*Q+
} 3/W'V,5G6
} 3c6b6
{vyv7L
} )6,=f.%
z]`k#O%%)
改进后的归并排序: .I0qGg
Jk=I^%~
package org.rut.util.algorithm.support; <oA7'|Bu<
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import org.rut.util.algorithm.SortUtil; b:]V`uF?
T\j{Bi5 \J
/** 8jo p_PG'
* @author treeroot 0rG^,(3m
* @since 2006-2-2 k:F9. j%*
* @version 1.0 kH7(@Pa
*/ 3e;^/kf<9
public class ImprovedMergeSort implements SortUtil.Sort { ]B3=lc"
Vi]W|bP
private static final int THRESHOLD = 10; po Vx8oO8
bU:EqW\(^
/* -^h' >.
* (non-Javadoc) k=JrLfD4
* T1Z;r*}
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ={d>iByq
*/ [)zP6\I
public void sort(int[] data) { A5R<p+t6
int[] temp=new int[data.length]; xQXXC|T
mergeSort(data,temp,0,data.length-1); ,-d0b0
} /-+xQn]
$jI3VB
private void mergeSort(int[] data, int[] temp, int l, int r) { >$7v ;Q
int i, j, k; 5aZ2j26
int mid = (l + r) / 2; Xi,CV[L\
if (l == r) "ZsOd>[/
return; X4Ic;
if ((mid - l) >= THRESHOLD) g<f <Ip=
mergeSort(data, temp, l, mid); N&g3t%F
else b Y\K
insertSort(data, l, mid - l + 1); 4;]hK!AXS
if ((r - mid) > THRESHOLD) mA+&Io
mergeSort(data, temp, mid + 1, r); mmEYup(l0;
else ERE)A-8
insertSort(data, mid + 1, r - mid); vZ&T}H~8
Bb^;q#S1
for (i = l; i <= mid; i++) { n;+LH9
temp = data; Hmd] FC,_
} b#toM';T
for (j = 1; j <= r - mid; j++) { X#TQ_T"
temp[r - j + 1] = data[j + mid]; lG!|{z7+0
} *@v)d[z_
int a = temp[l]; QWSTR\!
int b = temp[r]; .C(eh
for (i = l, j = r, k = l; k <= r; k++) { >qjq=Ege
if (a < b) { b8"?VS5-"
data[k] = temp[i++]; NOiN^::m
a = temp; ,p2s:&"
} else { KgiJUO`PR
data[k] = temp[j--]; q6SXWT'Sa
b = temp[j]; w2Jf^pR
} sRx63{
} gVv>9W('
} SmdjyK1~8
=`:K{loxq
/** 1V4s<m>#
* @param data -tHU6s,
* @param l . Z.)t
* @param i MgOR2,cR
*/ YY)s p%
private void insertSort(int[] data, int start, int len) { hp*/#D
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); E.ly#2?
} ceM6{N<_U
} |_*O'#jx
} TYmP)
} %Yicg6:
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堆排序： L,`Lggq-
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package org.rut.util.algorithm.support; G_{&sa
6@e+C;j=
import org.rut.util.algorithm.SortUtil; 8U>B~9:JO
L[H5NUG!
/** KJ=6n%6
* @author treeroot jN>{'TqW4
* @since 2006-2-2 D@|W<i-
* @version 1.0 jR22t`4
*/ ^ZhG>L*
public class HeapSort implements SortUtil.Sort{ V|/NB
') gi%
/* (non-Javadoc) o/6-3QUak
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) V\6[}J
*/ ^G.Xc\^w:
public void sort(int[] data) { QM O!v;
MaxHeap h=new MaxHeap(); QP)pgAc
h.init(data); rI>aAW'
for(int i=0;i h.remove(); 8lb%eb]U
System.arraycopy(h.queue,1,data,0,data.length); SAK!z!t
} L%K\C
v<OJ69J
private static class MaxHeap{ ,M6Sy]Aj
#qI= Z0Y
void init(int[] data){ {u\Mj
this.queue=new int[data.length+1]; e7(ucE
for(int i=0;i queue[++size]=data; TUDr\' @/f
fixUp(size); /VzI'^
} J(%0z:exs
} \"^w'ng
=fve/_Q~
private int size=0; l>{R`BZ/
+~roU{& o
private int[] queue; ?~;:jz|9<'
]dk8lZ;bo
public int get() { ("+}=*?OF3
return queue[1]; kc @[9eV
} VUYmz)m5
Q7$.LEioN
public void remove() { @,u/w4
SortUtil.swap(queue,1,size--); kRD%b[*d
fixDown(1); /D^"X 4!"
} :GW&O /Yo
file://fixdown 1_ C]*p
private void fixDown(int k) { %1O[i4s:-
int j; H5]^ 6 HwX
while ((j = k << 1) <= size) { 2eC(Ijq[a
if (j < size %26amp;%26amp; queue[j] j++; J-) XQDD
if (queue[k]>queue[j]) file://不用交换 \XM^oE#G
break; ZAUQJS 91E
SortUtil.swap(queue,j,k); 92d6U2T4&
k = j; 9}uW}yJ
} 7.@TK&
} 8<7GdCME
private void fixUp(int k) { m-DsY
while (k > 1) { :l&V]}:7*
int j = k >> 1; vab@-=%k
if (queue[j]>queue[k]) tBT<EV{ G
break; AfP'EP0m
SortUtil.swap(queue,j,k); d&u]WVU
k = j; *gF<m9&
} d/|D<Sb[s
} E%v?t1>/
E}_[QEY;Y
} 6,LubZFD
wm")[!h)v
} (_*5oj-
X*Dj[TD]
SortUtil： W4U@%b do
UybW26C;aU
package org.rut.util.algorithm; _uKZMl
b0A1hb[|
import org.rut.util.algorithm.support.BubbleSort; qY$qaM^=
import org.rut.util.algorithm.support.HeapSort; *B\H-lp?
import org.rut.util.algorithm.support.ImprovedMergeSort; Vc%R$E%
import org.rut.util.algorithm.support.ImprovedQuickSort; |'+eMl
import org.rut.util.algorithm.support.InsertSort; #8bsxx!s
import org.rut.util.algorithm.support.MergeSort; ofMY,~w
import org.rut.util.algorithm.support.QuickSort; U uM$~qf/K
import org.rut.util.algorithm.support.SelectionSort; ;)I'WQ]Q
import org.rut.util.algorithm.support.ShellSort; a9Z%JS]
Ppt2A6W
/** 80Y\|)
* @author treeroot saAxGG
* @since 2006-2-2 4)4+M
* @version 1.0 wwoweztER
*/ uy^
public class SortUtil { V&|Ed
public final static int INSERT = 1; ?EpSC&S\
public final static int BUBBLE = 2; E)-r+ <l
public final static int SELECTION = 3; }KKY6D|d>
public final static int SHELL = 4; X3:XTuV
public final static int QUICK = 5; V0(o~w/W%!
public final static int IMPROVED_QUICK = 6; zrv#Xa!O\
public final static int MERGE = 7; ^6P3%
public final static int IMPROVED_MERGE = 8; 6ubL1K
public final static int HEAP = 9; fr}Eaa-{^
X_G| hx
public static void sort(int[] data) { j:&4-K};Z`
sort(data, IMPROVED_QUICK); |*X*n*oI
} K+)%KP
private static String[] name={ zYv#:>C8
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" |Uk" {
}; F3lw@b3])
xc:!cA{V
private static Sort[] impl=new Sort[]{ -;XKcS7Ue
new InsertSort(), Hiv!BV|
new BubbleSort(), wpt='(
new SelectionSort(), s(LT
new ShellSort(), ~i_Tw#}
new QuickSort(), (j"(
new ImprovedQuickSort(), Rek -`ki5F
new MergeSort(), 0\~Z5k`IT
new ImprovedMergeSort(), q )lnS )
new HeapSort() FvuGup`w
}; bo=ZM9
!.<T"8BUpv
public static String toString(int algorithm){ H,<7G;FPT
return name[algorithm-1]; mNAY%Wn6k
} 9 ASb>A2~
q7m6&2$[
public static void sort(int[] data, int algorithm) { vF/ =J
impl[algorithm-1].sort(data); )|<_cwz
} 4YMX|1wd)
)Vk6;__
public static interface Sort { 0Hw-59MK
public void sort(int[] data); xf>z@)e
} |nk3^;Yf
l\!-2 T6Y
public static void swap(int[] data, int i, int j) { 5ZPzPUa8~
int temp = data; Q2%QLM:.,
data = data[j]; O:/yAc`
data[j] = temp; 0l#)fJo
} qxJQPz
} 9H]Lpi^OH