[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; I@sXmC2$\
} CqF=5z:A
int i1=l; ]J`yh$a
int i2=mid+1; t,CC~
for(int cur=l;cur<=r;cur++){ <OYy;s
if(i1==mid+1) oh>X/uj
data[cur]=temp[i2++]; DM*GvBdR
else if(i2>r) nMz~.^Q-
data[cur]=temp[i1++]; B Q)1)8r
else if(temp[i1] data[cur]=temp[i1++]; |dP[_nh?
else -;VKtBXP</
data[cur]=temp[i2++]; m\h. sg&
} _dg2i|yP<
} +a@:?=hc
*ud"?{)Z
} lQt&K1m
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改进后的归并排序: vbol70
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package org.rut.util.algorithm.support; d-cK`pSB
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import org.rut.util.algorithm.SortUtil; hvc%6A\nm
naQ0TN,
/** *{/L7])gm
* @author treeroot /Ah|Po
* @since 2006-2-2 ,{KjVv<
* @version 1.0 *jAw
*/ vocXk_
public class ImprovedMergeSort implements SortUtil.Sort { {{3n">s}:
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private static final int THRESHOLD = 10; ow,4'f!d
%cPz>PTW@
/* !i"Z
* (non-Javadoc) hqPpRSv'
* #5Zf6w
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Jl,mYFEZ
*/ vZ<@m2
public void sort(int[] data) { Obd};&6Q
int[] temp=new int[data.length]; b[mAkm?9+1
mergeSort(data,temp,0,data.length-1); ZO^Y9\L
} xlJ8n+
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private void mergeSort(int[] data, int[] temp, int l, int r) { y)5U*\b
int i, j, k; f,e7;u z%
int mid = (l + r) / 2; S6J7^'h
if (l == r) z j[/~I
return; kX\\t.nH
if ((mid - l) >= THRESHOLD) jl!rCOLt4
mergeSort(data, temp, l, mid); @D<KG
else e-}b]\
insertSort(data, l, mid - l + 1); "cK@Yo
if ((r - mid) > THRESHOLD) %Q)3*L
mergeSort(data, temp, mid + 1, r); 9}\{0;9
else 9`3%o9V9Y
insertSort(data, mid + 1, r - mid); n'dxa<F2|
[CCj5N1/
for (i = l; i <= mid; i++) { ^t|CD|,K_O
temp = data; *2$I, ~(P
} <($'jlZ
for (j = 1; j <= r - mid; j++) { Pf?*bI
temp[r - j + 1] = data[j + mid]; ,gvv297
} C2~t
int a = temp[l]; 6NvdFss'A{
int b = temp[r]; p4ML }q8
for (i = l, j = r, k = l; k <= r; k++) { hx'p0HDta
if (a < b) { @M:Uf7
data[k] = temp[i++]; uk8vecj
a = temp; \~3g*V
} else { jz\LI
data[k] = temp[j--]; yNwYP%"y
b = temp[j]; #i#4h<R
} @0XqUcV
} k"J[mT$b
} qre.^6x
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/** DOr()X
* @param data '+!@c&d#%o
* @param l ]yTMWIx#
* @param i "IK QFt'
*/ q#8$@*I
private void insertSort(int[] data, int start, int len) { H*l2,0&W
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 9M$=X-
} "y%S.ipWG
} 5#v
} /uTU*Oe
} B&tU~
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堆排序： ~"<AYJlO
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package org.rut.util.algorithm.support; {V> >a
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import org.rut.util.algorithm.SortUtil; /Dn,;@ZwAi
U%swqle4
/** HzW`j"\
* @author treeroot f}4bnu3
* @since 2006-2-2 KUr}?sdz
* @version 1.0 8=]R6[,fD
*/ :r<uH6x|
public class HeapSort implements SortUtil.Sort{ zi^T?<t
M_o<6C
/* (non-Javadoc) $oefG}h2
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9~6FWBt
*/ ^Fy{Q*p`(
public void sort(int[] data) { Qx9lcO_
MaxHeap h=new MaxHeap(); a0vg%Z@!
h.init(data); t@a2@dX|
for(int i=0;i h.remove(); Vb=Oz
System.arraycopy(h.queue,1,data,0,data.length); YS}uJ&WoF
} QzjLKjl7p4
JN{.-k4Ha
private static class MaxHeap{ g$++\%k&
i+I%]
void init(int[] data){ LuM[*_8
this.queue=new int[data.length+1]; rek89.p
for(int i=0;i queue[++size]=data; CM; r\,o
fixUp(size); G0Q8"]
} ]Zfg~K(
} REyk,s2"6
@O;gKFx
private int size=0; {X=gjQ9
qOyg&]7
private int[] queue; P= e3f(M2
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public int get() { IF<?TYy=3B
return queue[1]; D[.;-4"_
} >x(3p@6p
+V"t't7
public void remove() { 8vhg{L..
SortUtil.swap(queue,1,size--); ";jj`
fixDown(1); \r_-gn'1b
} 82w='~y
file://fixdown 99'e)[\
private void fixDown(int k) { 29]T:I1d[
int j; H /E.R[\+x
while ((j = k << 1) <= size) { F`l r5
if (j < size %26amp;%26amp; queue[j] j++; F,Ls1
if (queue[k]>queue[j]) file://不用交换 n'<FH<x
break; vT*z3
SortUtil.swap(queue,j,k); MuzlUW]
k = j; [m>kOv6>^
} l]BIFZ~
} ]!yuD/4A
private void fixUp(int k) { 6 ufF34tA
while (k > 1) { ?8cgQf$
int j = k >> 1; {uO=Wkp~7
if (queue[j]>queue[k]) s~ZLnEb
break; 7J~usF>A
SortUtil.swap(queue,j,k); MHs2UN
k = j; M.|@|If4?
} ?Y:>Ouv*z'
} 3},0b8};
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} $wL zaZL|
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} {> T r22S
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SortUtil： LKCj@NdV
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package org.rut.util.algorithm; {rQSB;3
n H)6mOYp
import org.rut.util.algorithm.support.BubbleSort; <cQ)*~hN
import org.rut.util.algorithm.support.HeapSort; L&[uE;ro
import org.rut.util.algorithm.support.ImprovedMergeSort; Fa}3UVm
import org.rut.util.algorithm.support.ImprovedQuickSort; M2UF3xD
import org.rut.util.algorithm.support.InsertSort; jf_xm=n
import org.rut.util.algorithm.support.MergeSort; d5/x2!mH8
import org.rut.util.algorithm.support.QuickSort; dQD YN_
import org.rut.util.algorithm.support.SelectionSort; _K(w&Kr
import org.rut.util.algorithm.support.ShellSort; 7Y`/w$
|7$Fr[2d
/** )<_e{_h
* @author treeroot '&?OhSeN
* @since 2006-2-2 D%L}vugxK
* @version 1.0 *v+xKy#M
*/ lTl-<E;
public class SortUtil { tI2V)i!
public final static int INSERT = 1; 7 &y'\
public final static int BUBBLE = 2; D6cqON0a.
public final static int SELECTION = 3; 3lw KV
public final static int SHELL = 4; oBfh1/<<a
public final static int QUICK = 5; "bI'XaSv
public final static int IMPROVED_QUICK = 6; )%8;C]G;
public final static int MERGE = 7; c{YBCWA
public final static int IMPROVED_MERGE = 8; aRPpDSR?l
public final static int HEAP = 9; 2Zf}t
G}!dm0s$
public static void sort(int[] data) { ~Z74e>V%
sort(data, IMPROVED_QUICK); _J'V5]=4
} :~K c"Pg
private static String[] name={ } 0su[gy[
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" IYeX\)Gv&
}; )f#raXa5+
blbL49;
private static Sort[] impl=new Sort[]{ [PVem
new InsertSort(), AfU~k!4`
new BubbleSort(), WCK;r{p%I
new SelectionSort(), FW](GWp`:
new ShellSort(), S8+GM
new QuickSort(), e^;<T9Esr
new ImprovedQuickSort(), L9,;zkgo
new MergeSort(), 0L3v[%_j"
new ImprovedMergeSort(), IM""s]
new HeapSort() P?- #d\qi
}; xq#YBi,
du,mbTQib
public static String toString(int algorithm){ [sxJ<
return name[algorithm-1]; ,,U8X [A
} 58S>B'
{bQi z
public static void sort(int[] data, int algorithm) { xa7~{ E,
impl[algorithm-1].sort(data); z?ck*9SZX
} dD%Sbb
PtfxF]%H
public static interface Sort { [^oTC;
public void sort(int[] data); xqP DL9\
} r&$r=f<
J.nJ@?O+
public static void swap(int[] data, int i, int j) { *{_WM}G
int temp = data; QqpXUyHp[
data = data[j]; F]_w~1 n5
data[j] = temp; :Z(w,
} oqLM-=0<}
} eouxNw}F1