[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; uOQ!av2"Rf
} Ob~7w[n3
int i1=l; t]3> X
int i2=mid+1; f 7R/i
for(int cur=l;cur<=r;cur++){ hqXp>.W
if(i1==mid+1) |mMK9OEu
data[cur]=temp[i2++]; !Y8+Z&^2
else if(i2>r) kk`K)PESi
data[cur]=temp[i1++]; ._E 6?
else if(temp[i1] data[cur]=temp[i1++]; (HEi;
else qix$ }(P
data[cur]=temp[i2++]; P,Z K
} /IxoS
} JpRn)e'Z
E"O6N.}.
} x/pX?k
"[QQ(]={
改进后的归并排序: J9%I&lu/
?v z[Zi
package org.rut.util.algorithm.support; ;tJ}*!z W
uIy$|N
import org.rut.util.algorithm.SortUtil; !.G knDT
(+CNs
/** 2M+}o"g
* @author treeroot 6`h}#@ (
* @since 2006-2-2 [59g]')
* @version 1.0 @tX8M[.eA
*/ zv-9z
public class ImprovedMergeSort implements SortUtil.Sort { *|9:
j].=,M<dxE
private static final int THRESHOLD = 10; 0{OafL8&l
mP]a}[
/* ,/YTW@N
* (non-Javadoc) qOTo p-
* h+c9FN
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !C;$5(k
*/ {UFs1
public void sort(int[] data) { S l`F`
int[] temp=new int[data.length]; o zMn8@R
mergeSort(data,temp,0,data.length-1); xV0:K=
} JLbmh1'
-l~+cI\2
private void mergeSort(int[] data, int[] temp, int l, int r) { NI:3hfs
int i, j, k; ]&?8l:3-G
int mid = (l + r) / 2; K8JshFIe
if (l == r) /,yRn31[
return; m++=FsiX=
if ((mid - l) >= THRESHOLD) }0C v J4
mergeSort(data, temp, l, mid); l[6lXR&|
else 7.*Mmx~]=
insertSort(data, l, mid - l + 1); $!vK#8-&{
if ((r - mid) > THRESHOLD) O'{g{
mergeSort(data, temp, mid + 1, r); oO^=%Mc(
else 1=_Qj}!1
insertSort(data, mid + 1, r - mid); g_JSgH!4
goOw.~dZ'
for (i = l; i <= mid; i++) { Mt*V-`+\
temp = data; d f j;e%H
} F@b=S0}K
for (j = 1; j <= r - mid; j++) { d/[kky}
temp[r - j + 1] = data[j + mid]; ]G~Z'fs<(
} q $=[v
int a = temp[l]; y q!{\@-
int b = temp[r]; MJA;P7g
for (i = l, j = r, k = l; k <= r; k++) { P @~)9W
if (a < b) { P7epBWqDP
data[k] = temp[i++]; iB}*<~`.Eg
a = temp; C;%1XFzM
} else { txiX1o!/L
data[k] = temp[j--]; 8<{i=V*x4
b = temp[j]; -' =?Hs.
} *mkVk7]c
} d+nxvh?I8
} 9TZ6c
oS~;>]W
/** Wjli(sT#-
* @param data pV`/6 }
* @param l MvTp%d.
* @param i xKkXr-yb`f
*/ 3:>hHQi
private void insertSort(int[] data, int start, int len) { 89m9iJ=
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ;?v&=Z't.
} abp\Ih^b
} S4pEBbV^n
} Q)=2%X
} p||mR
BZ(DP_}&D
堆排序： pq:[`
rN,T}M=2
package org.rut.util.algorithm.support; Bh&dV%'
k~?5mUyK<
import org.rut.util.algorithm.SortUtil; qCB{dp/
6),!sO?
/** e>P>DmlW
* @author treeroot (mioKO )?v
* @since 2006-2-2 >uYU_/y$2
* @version 1.0 j_h0hm]
*/ i v.G
public class HeapSort implements SortUtil.Sort{ O Q$C#:?
/6Kx249Dw
/* (non-Javadoc) 0lOR.}]q
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 211V'|a_>
*/ )iJv?Y\]
public void sort(int[] data) { xW7[VTXc^
MaxHeap h=new MaxHeap(); .#Z"Sj
h.init(data); `lrNH]B
for(int i=0;i h.remove(); cgO<%_l3`
System.arraycopy(h.queue,1,data,0,data.length); &Mz]y?k'
} q7I!wD9Cff
@<&u;8y-Cn
private static class MaxHeap{ ]<K"`q2
Gzs$0Ki=
void init(int[] data){ <+<Nsza
this.queue=new int[data.length+1]; j<R&?*
for(int i=0;i queue[++size]=data; *U$%mZS]1
fixUp(size); s5V|.R
} 5hh6;)
} li{!Jp5]1b
y;(G%s1
private int size=0; ?<S fhjU
IVVX3RI
private int[] queue; qlnA7cK!
:, 3S5!(y
public int get() { yivWT;`
return queue[1]; `xZ,*G7(*
} a!f71k r
FlUO3rc|
public void remove() { % [~0<uO
SortUtil.swap(queue,1,size--); y.s\MWvv>u
fixDown(1); 9m\Yi
} qz.l
file://fixdown HKIr?
private void fixDown(int k) { GDb Vy)&
int j; dk"@2%xJ2d
while ((j = k << 1) <= size) { .&`apQD}
if (j < size %26amp;%26amp; queue[j] j++; ,gM:s}l!dJ
if (queue[k]>queue[j]) file://不用交换 &C)97E
break; bAy\Sr #/
SortUtil.swap(queue,j,k); ?b"'w
k = j; +zXcTT[V
} fwlicbs'
} \(&&ed:
private void fixUp(int k) { n&a\mGF
while (k > 1) { '=eVem=
int j = k >> 1; _^`V0>Mh:
if (queue[j]>queue[k]) sZ7~AJ
break; H/.UDz
SortUtil.swap(queue,j,k); hztqZ:
k = j; h0HK~S#xBv
} 'Sesh'2 /
} 0cVxP)J+
Se37-
} RKM5FXX
Z9*@w`x^u
} =-&h@mB;G
NciIqF
SortUtil： 2E`mbT,v&
%NTJih`
package org.rut.util.algorithm; ,el[A`b
c=QN!n:
import org.rut.util.algorithm.support.BubbleSort; jw 5 U-zi
import org.rut.util.algorithm.support.HeapSort; ReL+V
import org.rut.util.algorithm.support.ImprovedMergeSort; rl&.|;5uH;
import org.rut.util.algorithm.support.ImprovedQuickSort; MmePhHf
import org.rut.util.algorithm.support.InsertSort; @ &Od1X
import org.rut.util.algorithm.support.MergeSort; uBn35%
import org.rut.util.algorithm.support.QuickSort; SLUQFoz}
import org.rut.util.algorithm.support.SelectionSort; *-uzsq.W
import org.rut.util.algorithm.support.ShellSort; nR wf;K
4sW~7:vU
/** Aon.Y Z
* @author treeroot ]0[ot$Da6
* @since 2006-2-2 _OS,zZ0
* @version 1.0 ^zS;/%
*/ N9y+Psh
public class SortUtil { LGVy4D
public final static int INSERT = 1; E7_OI7C
public final static int BUBBLE = 2; qZ +K4H
public final static int SELECTION = 3; @`8a3sL)
public final static int SHELL = 4; B#35)QI
public final static int QUICK = 5; jA[")RVG
public final static int IMPROVED_QUICK = 6; uPxjW"M+
public final static int MERGE = 7; 25j\p{*
public final static int IMPROVED_MERGE = 8; 12_7UWZ"
public final static int HEAP = 9; '5~l{3Lw
#};Zgixo$
public static void sort(int[] data) { 8xG"hJR
sort(data, IMPROVED_QUICK); TeO'E<@
} ;DVg[#
private static String[] name={ 6l &!4r@}
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" $|TLt{ K
}; [9:";JSl"Y
,?Zy4-
private static Sort[] impl=new Sort[]{ bNiJ"k<pN
new InsertSort(), %6m' |(-
new BubbleSort(), U@{>+G[
new SelectionSort(), " vc4QH$
new ShellSort(), Z glU{sU
new QuickSort(), (TO<SY3AB
new ImprovedQuickSort(), Z,81L3#6
new MergeSort(), n%iL+I
new ImprovedMergeSort(), {XUSw8W'
new HeapSort() 2;3&&yK2b
}; B., BP
H{Lt,#
public static String toString(int algorithm){ LU`)
return name[algorithm-1]; e"XolM0IM
} G"kX#k0S
*M0O&"~j
public static void sort(int[] data, int algorithm) { 6E:H
impl[algorithm-1].sort(data); 3>73s}3
} >;%QW
pGyk61
public static interface Sort { \Y!=O=za]
public void sort(int[] data); &0:Gj3`
} D/%v/mpj$
NWQ7%~#k*
public static void swap(int[] data, int i, int j) { yf`_?gJ6d
int temp = data; 4;gw&sFF
data = data[j]; Qz%q#4Zb
data[j] = temp; pY&dw4V
} !dcvG9JZ
} 9F6dKPN: