[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; 1L7^g*
} :Zob"*T
int i1=l; 6<5:m:KE
int i2=mid+1; ln,9v
for(int cur=l;cur<=r;cur++){ v7#|%
if(i1==mid+1) G7-k ,P^
data[cur]=temp[i2++]; ,BGUIu6
else if(i2>r) o#z$LT1dY
data[cur]=temp[i1++]; tW-[.Y -M,
else if(temp[i1] data[cur]=temp[i1++]; w"QZ7EyJ
else 4qsxlN>4O
data[cur]=temp[i2++]; 0u( 0*Xl
} *0V'rH)
} Y2dml!QM
<|82)hO
} ,jw`9a
*O[/- p&7
改进后的归并排序: Zvfy%k
O%F*i2I:+k
package org.rut.util.algorithm.support; )4:]gx#cr
<1*\ ~CX
import org.rut.util.algorithm.SortUtil; R4k+.hR
Q uw|KL
/** Vwjic2lGI
* @author treeroot KPjAk
* @since 2006-2-2 BxQ,T@
* @version 1.0 \>n[x;$
*/ VTyj<6Y
public class ImprovedMergeSort implements SortUtil.Sort { 31e O2|7
yxf#@Je"
private static final int THRESHOLD = 10; 4UzXTsjM7
>w.%KVBJ
/* 9!Xp+<
* (non-Javadoc) Cp>y<C"
* !su773vo
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) =iDd{$
*/ Bx$?*y&f!v
public void sort(int[] data) { UM]3MS:[
int[] temp=new int[data.length]; TGPZUyi3!=
mergeSort(data,temp,0,data.length-1); mV4gw'.;7
} D~M R)z_p~
[EZ=tk
private void mergeSort(int[] data, int[] temp, int l, int r) { Y(?SE< 4R
int i, j, k; |68/FJZ,5
int mid = (l + r) / 2; -O-?hsV)y
if (l == r) ObS#aRq
return; &uBfsa$
if ((mid - l) >= THRESHOLD) B8.}9
mergeSort(data, temp, l, mid); a+a6P5kJ
else /nX_Q?mo
insertSort(data, l, mid - l + 1); IX<9_q
if ((r - mid) > THRESHOLD) :7dc;WdM
mergeSort(data, temp, mid + 1, r); '}bmDb*
else &o1k_!25
insertSort(data, mid + 1, r - mid); V*Xr}FE
)"6"g9A
for (i = l; i <= mid; i++) { 1cRF0MI
temp = data; e+VE FWz
} h9iQn<lp4.
for (j = 1; j <= r - mid; j++) { 5tZ0zr
temp[r - j + 1] = data[j + mid]; ,\#s_N7
} cN&:V2,
int a = temp[l]; C|3cQ{
int b = temp[r]; -:J<JX)o
for (i = l, j = r, k = l; k <= r; k++) { 72*j6#zS
if (a < b) { KMQPA>w#
data[k] = temp[i++]; eL}X().
a = temp; `P*BW,P'T
} else { BS?$eai@:9
data[k] = temp[j--]; bz~aj}"`
b = temp[j]; [/ertB
} y}|E)
} IXm[c@5l
} $% gz,{
.n)R@&9
/** ue'dI
* @param data I'p+9H$
* @param l ozl!vf# kv
* @param i ;vX1U8
*/ M}@>h
private void insertSort(int[] data, int start, int len) { |k%1mE(+=s
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ;)P=WS:=
} X')l04P@%
} 8Djki]
} DQ[7p(
} O/d]2<V
suGd&eP|
堆排序： _Rkvg-
dn Sb}J
package org.rut.util.algorithm.support; f\.y z[
]+B.=mO_
import org.rut.util.algorithm.SortUtil; ^W@%(,xb
(~E-=+R[$&
/** z5Tsu1c
* @author treeroot t+]1D@hv
* @since 2006-2-2 H=g%>W%3
* @version 1.0 b0f6p>~q^
*/ C8|#
public class HeapSort implements SortUtil.Sort{ :eJJL,v
[/VpvQ'
/* (non-Javadoc) X-,oL.:c
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) RO%M9LISI
*/ !y'>sAf
public void sort(int[] data) { Ht\2 IP
MaxHeap h=new MaxHeap(); "Jg.)1Jw
h.init(data); 9PV+Kr!c5I
for(int i=0;i h.remove(); k_zn>aR$F
System.arraycopy(h.queue,1,data,0,data.length); 4gNN "
} J]{<Z?%
z,2*3Be6V
private static class MaxHeap{ $ Y^0l
p4UEhT
void init(int[] data){ e5n]@mu%
this.queue=new int[data.length+1]; <mVFC
for(int i=0;i queue[++size]=data; 3 v.8
fixUp(size); V3r)u\ o'
} n00J21
} _<Ij)#Rq7
>D}|'.&
private int size=0; Q.h.d))
$?]`2*i
private int[] queue; B$x@I\(M
i'"#{4I
public int get() { Rt&5s)O'
return queue[1]; y@1QVt04
} /93z3o7D>
gH\>",[
public void remove() { 748:* (O
SortUtil.swap(queue,1,size--); HpfZgkC+
fixDown(1); H)"]I3
} vD?D]8.F~Q
file://fixdown $e--"@[Y
private void fixDown(int k) { z/f._Z(
int j; Ak kF6d+
while ((j = k << 1) <= size) { q5z^y(Sv
if (j < size %26amp;%26amp; queue[j] j++; 4\*:Lc,-
if (queue[k]>queue[j]) file://不用交换 w\eC{,00:
break; /4c`[
SortUtil.swap(queue,j,k); 4Y2I'~'
k = j; ^H1m8=
} -o`K/f}d
} QJrXn6`
private void fixUp(int k) { y"'p#j
while (k > 1) { KF1iYo>p
int j = k >> 1; [)GRP
if (queue[j]>queue[k]) -$0}rfX
break; ?~t5>PEonv
SortUtil.swap(queue,j,k); I2*(v%.-
k = j; _X;,,VEV!
} ZeU){CB
} SOM? 0.
T#E$sZ
} YGLq~A
k3@d =k
} i$@xb_
D6&P9e_5
SortUtil： ]BjYUTNm
HQ" trV
package org.rut.util.algorithm; }zsIp,
. _|=Btoo
import org.rut.util.algorithm.support.BubbleSort; L8f+uI
import org.rut.util.algorithm.support.HeapSort; -s`Wd4AP
import org.rut.util.algorithm.support.ImprovedMergeSort; 0Ui_Trlc
import org.rut.util.algorithm.support.ImprovedQuickSort; ecJjE 56P
import org.rut.util.algorithm.support.InsertSort; 1hgIR^;[b
import org.rut.util.algorithm.support.MergeSort; ,pdzi9@=t
import org.rut.util.algorithm.support.QuickSort; &y=OZ !M
import org.rut.util.algorithm.support.SelectionSort; 3%1wQXr0
import org.rut.util.algorithm.support.ShellSort; A46q`l9B
jdu6P+_8n
/** lnyq%T[^
* @author treeroot R.HvqO
* @since 2006-2-2 qCfEv4
* @version 1.0 (@xC-*
*/ 3ej237~F,L
public class SortUtil { )e`9U.C
public final static int INSERT = 1; ;nW;M 4{
public final static int BUBBLE = 2; R3lZ|rxv:
public final static int SELECTION = 3; Y,Z$U| U
public final static int SHELL = 4; stUv!
public final static int QUICK = 5; hLgX0QV
public final static int IMPROVED_QUICK = 6; `^hA&/1
public final static int MERGE = 7; :.XlAQR~b
public final static int IMPROVED_MERGE = 8; ~,&8)1
public final static int HEAP = 9; o4EY2
]w;t0Bk
public static void sort(int[] data) { 50-7L,
sort(data, IMPROVED_QUICK); tugIOA
} -bOtF%
private static String[] name={ CkNR{?S
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" yx-"&K=`
}; :LNZC,-f}5
U2<q dknB
private static Sort[] impl=new Sort[]{ H+Bon=$cE!
new InsertSort(), =5B5
new BubbleSort(), [#Gu?L_W
new SelectionSort(), *K$a;2WjzG
new ShellSort(), qg`ae
new QuickSort(), Zn r4^i&(
new ImprovedQuickSort(), 6:B,ir _
new MergeSort(), ]J!#"m-]
new ImprovedMergeSort(), Qu=b-9
new HeapSort() }(Fmr7%m
}; ?;`GCE
?zutU w/m
public static String toString(int algorithm){ *v K~t|z
return name[algorithm-1]; a BMV6'
} S$fS|N3]%
jFe8s@7
public static void sort(int[] data, int algorithm) { vvxD}p=y
impl[algorithm-1].sort(data); Lv/}&'\(
} u;rmqo1
RS}_cm0
public static interface Sort { l{C]0^6>i
public void sort(int[] data); XfVdYmii
} YQd($
fcF|m5
public static void swap(int[] data, int i, int j) { C za}cF
int temp = data; k`N*_/(|n
data = data[j]; ">1wPq&
data[j] = temp; M*3G
} %pOz%v~
} SWI\;:k