[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; xr?r3Y~^e
} R'80{
int i1=l; JUXK}0d%eN
int i2=mid+1; W>,b1_k c
for(int cur=l;cur<=r;cur++){ 4<O[d
if(i1==mid+1) 3g6R<Ez
data[cur]=temp[i2++]; I]$kVa1iN
else if(i2>r) ,$G89jSM
data[cur]=temp[i1++]; "iKK&%W
else if(temp[i1] data[cur]=temp[i1++]; B$lbp03z
else u(lq9; ;Th
data[cur]=temp[i2++]; g1}RA@9
} koie
} /evh.S
6: M
} ;aFQP:l/
Dbtw>:=
改进后的归并排序: I4");T3
JEAqSZak#
package org.rut.util.algorithm.support; y[$e]N
{!EbGIh
import org.rut.util.algorithm.SortUtil; "%Rx;xw|
v/m6(z
/** ,Wdyg8&.
* @author treeroot nH_A`m3%/
* @since 2006-2-2 +q2l,{|?
* @version 1.0 mqE&phF,
*/ fj"S|]e
public class ImprovedMergeSort implements SortUtil.Sort { V8N<%/A=
M1oCa,8M+
private static final int THRESHOLD = 10; 9wAP%xh
*/qv}
/* 9^}GUJy?
* (non-Javadoc) GEvif4
* +^"|FtKhE
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %b_zUFHPp
*/ z24-hC
public void sort(int[] data) { bGSgph
int[] temp=new int[data.length]; _x>u"w
mergeSort(data,temp,0,data.length-1); /Ia#udkNMp
} U3Dy:K[
u4Xrvfb,
private void mergeSort(int[] data, int[] temp, int l, int r) { ZBnf?fU
int i, j, k; [qb#>P2G3
int mid = (l + r) / 2; 2R1W[,Ga!
if (l == r) T[7-3[w<)
return; lw Kr$X4
if ((mid - l) >= THRESHOLD) ME7JU|@Z
mergeSort(data, temp, l, mid); D)mqe-%1
else '7xY,IY
insertSort(data, l, mid - l + 1); .vb*|So
if ((r - mid) > THRESHOLD) Q"(i
mergeSort(data, temp, mid + 1, r); @ 8SYV}0H
else <2R=!n@b\
insertSort(data, mid + 1, r - mid); 5&VLq
aFbA=6
for (i = l; i <= mid; i++) { GCIm_ n
temp = data; fa6L+wt4O
} _H;ObTiB
for (j = 1; j <= r - mid; j++) { &K\di*kN
temp[r - j + 1] = data[j + mid]; R!-RSkB
} <4VUzgX2
int a = temp[l]; 3 =S.-
int b = temp[r]; f:=?"MX7
for (i = l, j = r, k = l; k <= r; k++) { %f^TZ,q$
if (a < b) { |M+ !O93
data[k] = temp[i++]; K~Xt`
a = temp; XCk \#(VSE
} else { xo]|m\#k5E
data[k] = temp[j--]; g{nu3F}8){
b = temp[j]; 2R)Y}*VX
} le1'r>E$
} s^E%Ukm
} K!'9wt
'g$|:bw/
/** Ok,hm.|
* @param data 0BBWuNF.
* @param l L>xN7N3&m
* @param i T}g;kppC
*/ _jr%s
private void insertSort(int[] data, int start, int len) { BG=h1ybz
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ni3^J5XW
} V-)q&cbW]q
} oS]XE!^M
} \=nY&Ml
} *VD-c
./[t'dgC
堆排序： 4|*_mC
A}W&=m8!
package org.rut.util.algorithm.support; ,(]hykbXp
F*(<`V
import org.rut.util.algorithm.SortUtil; m'a3}vRV(
TMq\}k-I5
/** [P"#?7 N
* @author treeroot *P9)M%
* @since 2006-2-2 F9Mv$g79
* @version 1.0 &%FpNU9
*/ 0OlB;
public class HeapSort implements SortUtil.Sort{ IV!&jL
Pxl7zz&pl=
/* (non-Javadoc) &a7KdGP8V
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0Y[mh@(
*/ x! Z|^q
public void sort(int[] data) { 6o {41@v(
MaxHeap h=new MaxHeap(); _,~/KJp
h.init(data); z}kD:A)a
for(int i=0;i h.remove(); 3'IF?](]U
System.arraycopy(h.queue,1,data,0,data.length); XN??^1{J}]
} "S*lI^8Z!
\-c70v63X
private static class MaxHeap{ Azu$F5G!n
:Oy9`vv
void init(int[] data){ v vOG]2z
this.queue=new int[data.length+1]; & [4Gv61
for(int i=0;i queue[++size]=data; _g 3hXsA
fixUp(size); Un7jzAvQ
} MdCEp1Z
} :+en8^r%
~%>ke
private int size=0; Q]66v$
3>c<E1
private int[] queue; \_0nH`
t13wQt
public int get() { ax,%07hJ
return queue[1]; ^ WidA-
} 0~)cAKus
b,~6cDU
public void remove() { Bv@NE2
SortUtil.swap(queue,1,size--); 1Hk`i%
fixDown(1); uq{w1O5
} 11O^)_|c
file://fixdown 1iig0l6\m
private void fixDown(int k) { #r>
int j; D&:,,Dp
while ((j = k << 1) <= size) { <mi*AY
if (j < size %26amp;%26amp; queue[j] j++; 6-j><'
if (queue[k]>queue[j]) file://不用交换 evz{@;.R
break; W(Xb]t=19
SortUtil.swap(queue,j,k); eM{,B
k = j; K-Y;[+#g1o
} @tR:}J*9s
} 0%#ZupN
private void fixUp(int k) { ~#pQWa5
while (k > 1) { 5Ta<$t
int j = k >> 1; r3{Cuz
if (queue[j]>queue[k]) E.zY(#S
break; Hq ]f$Q6:
SortUtil.swap(queue,j,k); .\".}4qQ
k = j; 1T!(M"'Ij
} tp7cc;0
} vYcea
NirG99kyo
} r[ni{&
ot8UuBq
} !.Eua3:V*
4'Potv@/
SortUtil： |@!4BA
!EB<e5}8wK
package org.rut.util.algorithm; F4`ud;1H
4|ML#aRz
import org.rut.util.algorithm.support.BubbleSort; _H}8eU
import org.rut.util.algorithm.support.HeapSort; PuYAoKG
import org.rut.util.algorithm.support.ImprovedMergeSort; $~W=)f9
import org.rut.util.algorithm.support.ImprovedQuickSort; WzDL(~m+Z
import org.rut.util.algorithm.support.InsertSort; Py_yIwQqg
import org.rut.util.algorithm.support.MergeSort; Psm5J80}n
import org.rut.util.algorithm.support.QuickSort; 0go{gUI
import org.rut.util.algorithm.support.SelectionSort; YHSdaocp
import org.rut.util.algorithm.support.ShellSort; FhpS#,Y$
$pr\"!|z
/** KP,#x$Bg
* @author treeroot 1Tm,#o
* @since 2006-2-2 1wAD_PI|BH
* @version 1.0 bvzNur_
*/ q|r^)0W
public class SortUtil { % 8u97f W
public final static int INSERT = 1; Ymt.>8L
public final static int BUBBLE = 2; (_1(<Jw
public final static int SELECTION = 3; 6&xpS9
public final static int SHELL = 4; z0!k
public final static int QUICK = 5; b\^X1eo
public final static int IMPROVED_QUICK = 6; =hL;Q@inb
public final static int MERGE = 7; |Y"nZK,
public final static int IMPROVED_MERGE = 8; J[ ;g \
public final static int HEAP = 9; &6deds
a=@]Ov/
public static void sort(int[] data) { "Tt5cqUQoY
sort(data, IMPROVED_QUICK); PuO5@SP~
} w5Lev}Rb
private static String[] name={ uW;[FTcqy$
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" >oh7f|
}; f"9aL= 3
\Hb"bv
private static Sort[] impl=new Sort[]{ S*PcK>
new InsertSort(), bAOL<0RS9`
new BubbleSort(), @-zL"%%dw'
new SelectionSort(), N_L~oX_
new ShellSort(), [L(qrAQ2|z
new QuickSort(), wB'GV1|jL
new ImprovedQuickSort(), 'rl?'~={p
new MergeSort(), e\)r"!?H`
new ImprovedMergeSort(), &;3iHY;
new HeapSort() g A+p^`;[
}; Y.yiUf/Q
AdU0 sZ+&c
public static String toString(int algorithm){ Y(mnGaVn
return name[algorithm-1]; x_L5NsO:
} 1egq:bh
(sDZ&R
public static void sort(int[] data, int algorithm) { vd{ban9
impl[algorithm-1].sort(data); 'Hf+Y/`
} <DR$WsDG
fbg:rH\_
public static interface Sort { Dm{9;Abs%
public void sort(int[] data); p ;]Qxh
} >uLWfk+y1
H^ds<I<)
public static void swap(int[] data, int i, int j) { ^ruz-N^Y!
int temp = data; 2y`X)
data = data[j]; 3R>"X c
data[j] = temp; /0m0""
} Nb3uDA5R
} "50c<sZSB