[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; II,8O
} [d]9Oa4
int i1=l; TuaBm1S{f
int i2=mid+1; h@ryy\9
for(int cur=l;cur<=r;cur++){ Qt<&WB fn
if(i1==mid+1) $(x]
data[cur]=temp[i2++]; l+^*LqEW2
else if(i2>r) |&i<bqLw:
data[cur]=temp[i1++]; {"KMs[M
else if(temp[i1] data[cur]=temp[i1++]; `<d }V2rdz
else R (n2A$
data[cur]=temp[i2++]; &Au@S$ij
} }k.Z~1y
} ncT&Gr
h<<v^+m
} IW] rb/H
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改进后的归并排序: T]~xj4
pTLCWbF?
package org.rut.util.algorithm.support; 6.yu-xm
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import org.rut.util.algorithm.SortUtil; |P?*5xPB
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/** uQKT
* @author treeroot YPI-<vM~
* @since 2006-2-2 O0H.C0}
* @version 1.0 O?#7N[7
*/ b@hqz!)l`
public class ImprovedMergeSort implements SortUtil.Sort { '!B&:X)
J5,9_uo]
private static final int THRESHOLD = 10; 7s^'d,P
X 0+vXz{~g
/* {]4LULq
* (non-Javadoc) sK?twg;D*|
* HJ.-Dg5U
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 7;@]t^d=$
*/ &wDs6xq
public void sort(int[] data) { o-B$J?
int[] temp=new int[data.length]; X|]AT9W
mergeSort(data,temp,0,data.length-1); >Cq<@$I2EB
} mj7#&r,1l
5*u+q2\F
private void mergeSort(int[] data, int[] temp, int l, int r) { kb!%-k
int i, j, k; 5wU]!bxr
int mid = (l + r) / 2; SQ+Gvq%Q]
if (l == r) ) ;Y;Q
return; iuul7VR-%
if ((mid - l) >= THRESHOLD) Dk51z@
mergeSort(data, temp, l, mid); 'i|YlMFIg
else >Y@H4LF;1x
insertSort(data, l, mid - l + 1); M x"\5i
if ((r - mid) > THRESHOLD) 2&J)dtqz
mergeSort(data, temp, mid + 1, r); 5146kp|1
else Q\sK"~@3
insertSort(data, mid + 1, r - mid); ]JQULE)
m+z&Q
for (i = l; i <= mid; i++) { vo{--+{ky!
temp = data; %JTpI`
} 4 s9LB
for (j = 1; j <= r - mid; j++) { t\O16O7S
temp[r - j + 1] = data[j + mid]; 4Ftu
} N!tX<u~2
int a = temp[l]; R[+<^s}p/
int b = temp[r]; SOaoo^,O
for (i = l, j = r, k = l; k <= r; k++) { <qt|d&
if (a < b) { +R75v)
data[k] = temp[i++]; )NT*bLRPQ
a = temp; +R:(_:7
} else { * kh tJ]=
data[k] = temp[j--]; 6j|{`Zd)G
b = temp[j]; @BMx!r5kn
} goWuw}?
} \cM2k-
} lr&a;aZp
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/** VuZr:-K/
* @param data %E;'ln4h&,
* @param l _7y[B&g[r
* @param i #~=RyH
*/ \o3gKoL%
private void insertSort(int[] data, int start, int len) { m+$VVn3Z}
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); E' uZA
} sV*H`N')S
} C9)@jK%
} 3Tm+g2w2V8
} [()koU#w.
3=V&K-
堆排序： 'dc#F3
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package org.rut.util.algorithm.support; b%c9oR's^
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import org.rut.util.algorithm.SortUtil; tfWS)y7
%\:Wi#w>
/** .x&%HA
* @author treeroot MLp9y#
* @since 2006-2-2 %!#azI
* @version 1.0 ]hV*r@d
*/ &BSn?
public class HeapSort implements SortUtil.Sort{ :b!s2n!u
X"*5+* z]
/* (non-Javadoc) ,<X9Y2B
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Rf% a'b
*/ "$vRMpW:
public void sort(int[] data) { 0<*<$U
MaxHeap h=new MaxHeap(); {Y1Ck5
h.init(data); tpx2IE
for(int i=0;i h.remove(); HjwE+:w
System.arraycopy(h.queue,1,data,0,data.length); b7ZSPXV
} NwfVL4Xg
sa8Vvzvo.
private static class MaxHeap{ pQQH)`J|t
gnHbb-<i,
void init(int[] data){ 2B`JGFcdcB
this.queue=new int[data.length+1]; #lO Mm9
for(int i=0;i queue[++size]=data; `EQL" =)
fixUp(size); aDN`6[
} 3$ PV2"
} 43 :X,\~)
7-V/RChBm
private int size=0; 5~S5F3
lNv|M)I
private int[] queue; s,_m{ to
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public int get() { NX&_p!_V
return queue[1]; dQG=G%W
} 2 ? 4!K.
:~SyL!
public void remove() { J9 I:Q<;
SortUtil.swap(queue,1,size--); _(zG?]y0P
fixDown(1); GKeU%x
} 4 H&#q>
file://fixdown hCo|HB
private void fixDown(int k) { FC4wwzb
int j; f,Ghb~y
while ((j = k << 1) <= size) { !TcJ)0
if (j < size %26amp;%26amp; queue[j] j++; &,)&%Sg[
if (queue[k]>queue[j]) file://不用交换 A/?7w
break; c4zR*
SortUtil.swap(queue,j,k); 3r1*m +
k = j; ,tRj4mx
} fd9k?,zM
} L\iFNT}g`
private void fixUp(int k) { VG~Vs@c(
while (k > 1) { KG{St{uJ
int j = k >> 1; @KUWxFak
if (queue[j]>queue[k]) =WJNWt>
break; `QY)!$mUIF
SortUtil.swap(queue,j,k); ;GD]dW#
k = j; 8JUwf
} 4`=mu}Y2
} |+"(L#wk
]{>,rK[So
} %xt^698&X
<\S:'g"(
} Xlt|nX~#;
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SortUtil： tZB<on<.)
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package org.rut.util.algorithm; )=-szJjXZ
q" 5(H5
import org.rut.util.algorithm.support.BubbleSort; #)VF3T@#'
import org.rut.util.algorithm.support.HeapSort; '4<1 1(U
import org.rut.util.algorithm.support.ImprovedMergeSort; P1f[%1
import org.rut.util.algorithm.support.ImprovedQuickSort; -D~%|).'
import org.rut.util.algorithm.support.InsertSort; |vzl. ^"-
import org.rut.util.algorithm.support.MergeSort; h@wgd~X9
import org.rut.util.algorithm.support.QuickSort; Z5]>pJFq,
import org.rut.util.algorithm.support.SelectionSort; l9H!au=
import org.rut.util.algorithm.support.ShellSort; 7cMv/g^h@
uXl3k:_n
/** An/|+r\
* @author treeroot 3irl (;v
* @since 2006-2-2 '/%H3A#L
* @version 1.0 H" 7u7l
*/ k~z Iy;AZ
public class SortUtil { g#E-pdY
public final static int INSERT = 1; pI<f) r
public final static int BUBBLE = 2; l}M!8:UzU
public final static int SELECTION = 3; 1yY0dOoLG)
public final static int SHELL = 4; S`Rs82>
public final static int QUICK = 5; ,9 a
public final static int IMPROVED_QUICK = 6; YKf0dh;O
public final static int MERGE = 7; *DhiN
public final static int IMPROVED_MERGE = 8; }W,[/)MO
public final static int HEAP = 9; UkGCyGyZ[
{BU;$
public static void sort(int[] data) { w@fi{H(R
sort(data, IMPROVED_QUICK); (&x['IR
} bi;1s'Y<D
private static String[] name={ g< .qUBPKX
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 13/]DF,S"^
}; P{^6v=8)
o#1 $q`Z
private static Sort[] impl=new Sort[]{ Eu04e N
new InsertSort(), BING{ew
new BubbleSort(), El"Q'(:/U
new SelectionSort(), zT-_5uZQ
new ShellSort(), lU8Hd|@-
new QuickSort(), K!l5coM
new ImprovedQuickSort(), a7%]Y}$
new MergeSort(), |]*/R^1>2
new ImprovedMergeSort(), ;i+#fQO7Q
new HeapSort() 8DaL,bi*.
}; %ULr8)R;
Dv`c<+q(#
public static String toString(int algorithm){ \xoP)Ub>
return name[algorithm-1]; u\nh[1)a)
} E8&TO~"a]e
Ozf@6\/t
public static void sort(int[] data, int algorithm) { >b4eL59
impl[algorithm-1].sort(data); m&yJzMW|
} '1/i"yoW
|$_sX9\`?|
public static interface Sort { @U}1EC{A
public void sort(int[] data); H} g{Cr"Ex
} @Do= k
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public static void swap(int[] data, int i, int j) { S|+o-[e8O
int temp = data; 4H]L~^CD
data = data[j]; |P}y,pNQ
data[j] = temp; u,4eCxYE$
} nzeX[*
} Ooy7*W';