[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; !VI]oRgP
} DIzH`|Y
int i1=l; b+&%1C
int i2=mid+1; |qmu_x\
for(int cur=l;cur<=r;cur++){ gm[z[~X@
if(i1==mid+1) {yB&xj[z
data[cur]=temp[i2++]; aM:nOt" S1
else if(i2>r) $l|qk z
data[cur]=temp[i1++]; HLZ;8/|48m
else if(temp[i1] data[cur]=temp[i1++]; U~j ^I^
else 0QOBL'{7)
data[cur]=temp[i2++]; */|9= $54
} MgNU``
} 6Qy@UfB
!=:$lzS^
} h}cy D7Wn
/i-J&*6_
改进后的归并排序: !cAyTl(_
\&iP`v`K
package org.rut.util.algorithm.support; D0#x Lh
!H irhDN
import org.rut.util.algorithm.SortUtil; 0 rXxRQ
[5MJwRM^!;
/** P5#r,:zL
* @author treeroot F>-B3x
* @since 2006-2-2 .G)(0z("s
* @version 1.0 Q'YH>oGh^
*/ '=G|Sq^aO
public class ImprovedMergeSort implements SortUtil.Sort { f/Hm{<BY
]b%Hy
private static final int THRESHOLD = 10; ?$6Y2
pk3<|
/* 6u`)QUmItg
* (non-Javadoc) C~N/A73gF
* %y|)=cm[
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {jho&Ai
*/ k'IYA#T6
public void sort(int[] data) { R@6zGZ1
int[] temp=new int[data.length]; jlBanGs?
mergeSort(data,temp,0,data.length-1); i]|Yg$
} we;G]`@?
lq>+~zX{
private void mergeSort(int[] data, int[] temp, int l, int r) { !2'jrJGc
int i, j, k; L?Qg#YSd~
int mid = (l + r) / 2; ( |PAx(
if (l == r) \CXQo4P
return; :I:!BXQT$
if ((mid - l) >= THRESHOLD) 4x;/HEb7?
mergeSort(data, temp, l, mid); HaYE9/xS
else 2#<xAR
insertSort(data, l, mid - l + 1); %d>=+Ds[
if ((r - mid) > THRESHOLD) a(9L,v#?
mergeSort(data, temp, mid + 1, r); A%D7bQ
else b r^_'1
insertSort(data, mid + 1, r - mid); rZfN+S,g
lI-L` x
for (i = l; i <= mid; i++) { o_D?t-XH
temp = data; -R%<.]fJ
} 7A\~)U@
for (j = 1; j <= r - mid; j++) { ]Qfn(u=o
temp[r - j + 1] = data[j + mid]; ,^x4sA[/
} T:IW%?M
int a = temp[l]; N#Zhxu,g!
int b = temp[r]; ^H2-RBE#
for (i = l, j = r, k = l; k <= r; k++) { z-LB^kc8oQ
if (a < b) { HKqwE=NZ
data[k] = temp[i++]; ld^=#]g
a = temp; >9q&PEc
} else { |iR T! ]
data[k] = temp[j--]; ;3kj2}
b = temp[j]; E2"q3_,,
} fVt9X*xKS
} t7m>A-I
} |pmZ.r
6q]5Es<
/** |ZCn`9hvn
* @param data 8 XICF
* @param l xZQg'IT
* @param i YQpSlCCo 3
*/ <%Ostqj
private void insertSort(int[] data, int start, int len) { F6K4#t+9
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); +> WM[o^I
} 05spovO/'
} e?Ho a$k
} y-j\zK
} #SX8=f`K5
qOUqs'7/]
堆排序： Ty<L8+B|
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package org.rut.util.algorithm.support; sz)oZPu|
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import org.rut.util.algorithm.SortUtil; C%U`"-%n@7
GD:4"$)[o
/** RtCkVxaEx
* @author treeroot .{=$!8|&I9
* @since 2006-2-2 S=nP[s
* @version 1.0 >A<bBK#
*/ }>'PT-
public class HeapSort implements SortUtil.Sort{ 2OwV^-OG
PIWux{
/* (non-Javadoc) ]b=P=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) `d[1`P1i[
*/ UH"#2< |b
public void sort(int[] data) { r.T<j.\
MaxHeap h=new MaxHeap(); TD9;kN1`
h.init(data); 7As|Ns`
for(int i=0;i h.remove(); %uoQ9lD'
System.arraycopy(h.queue,1,data,0,data.length); Rt{B(L.?<
} |0\0a&tkPl
6sE{{,OGB
private static class MaxHeap{ "F}'~HWZp
t(+)#
void init(int[] data){ K^3co
this.queue=new int[data.length+1]; 1=nUW":
for(int i=0;i queue[++size]=data; 0V{(Ru.O
fixUp(size); .(X lg-H,
} NO0"*c;
} 9XHz-+bQ
Mze;k3
private int size=0; h@@nR(<i
eXkujjSw"
private int[] queue; (__yh^h:m
Z1h]
public int get() { je6CDFqw
return queue[1]; p[@5&_u(z
} <n:}kQTT
Zo}y(N1K}
public void remove() { s (0*
SortUtil.swap(queue,1,size--); 1O!/g
fixDown(1); DEw8*MN
} s%!`kWVJ.
file://fixdown /%I7Vc
private void fixDown(int k) { N~?{UOZd
int j; LFZiPu
while ((j = k << 1) <= size) { Hh4 n
if (j < size %26amp;%26amp; queue[j] j++; Ic{F*nnM
if (queue[k]>queue[j]) file://不用交换 xEltwuDd?
break; A+&xMM2Wj
SortUtil.swap(queue,j,k); {66fG53x
k = j; c\q
} r,]#b[:.s|
} QeDQo
private void fixUp(int k) { ?hR7<02
while (k > 1) { 3-%Cw2ds
int j = k >> 1; P1U*g!
if (queue[j]>queue[k]) Pe_!?:vF
break; /{{UP-
SortUtil.swap(queue,j,k); `Bw9O%]-S
k = j; Jj=;
} WA$>pG5s
} `Rdm-[&
CAU0)=M
} 0vGyI>
;oxAe<VIj
} ^Q{Bq
H3H_u4_?SE
SortUtil： /R LI,.%
XG@`ZJhU6
package org.rut.util.algorithm; J@L9p46,
S|zW^|YU
import org.rut.util.algorithm.support.BubbleSort; Z Dhx5SL&
import org.rut.util.algorithm.support.HeapSort; ;+I/I9~
import org.rut.util.algorithm.support.ImprovedMergeSort; <N(oDaU
import org.rut.util.algorithm.support.ImprovedQuickSort; Gs*G<P"
import org.rut.util.algorithm.support.InsertSort; 3pXLSdxB
import org.rut.util.algorithm.support.MergeSort; #Ch;0UvFF
import org.rut.util.algorithm.support.QuickSort; 4<X!<]3]
import org.rut.util.algorithm.support.SelectionSort; |3{&@7
import org.rut.util.algorithm.support.ShellSort; \@~UDP]7
zD)pF1,7:8
/** DOQc"+
* @author treeroot !>(RK"KWq]
* @since 2006-2-2 OI0B:()
* @version 1.0 @+Y8*Rj\3
*/ =9G;PVk|
public class SortUtil { J RPSvP\
public final static int INSERT = 1; +y#T?!jQYj
public final static int BUBBLE = 2; O%f8I'u$
public final static int SELECTION = 3; [,~TaP}m
public final static int SHELL = 4; -/D|]qqHm
public final static int QUICK = 5; 46h@j>/K
public final static int IMPROVED_QUICK = 6; *RR[H6B^]X
public final static int MERGE = 7; UkfB^hA
public final static int IMPROVED_MERGE = 8; gr-x|wK
public final static int HEAP = 9; dp5f7>]:(
1P]de'-`j
public static void sort(int[] data) { xAwf49N~
sort(data, IMPROVED_QUICK); .9|uQEL
} >J=<bhR
private static String[] name={ jko"MfJ
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" S)A'Y]2X
}; t/Z:)4Z
X['2b78k
private static Sort[] impl=new Sort[]{ eX2<}'W<
new InsertSort(), IC{F.2D
new BubbleSort(), !RlC~^ -
new SelectionSort(), 5M23/= N
new ShellSort(), M;Wha;%E"
new QuickSort(), 4Z)DDz-}V
new ImprovedQuickSort(), ACjf\4Q
new MergeSort(), =f:(r'm?r.
new ImprovedMergeSort(), >!9h6BoGV
new HeapSort() OK`Z@X_,bW
}; D22Lu;E
6U,fz#<,}
public static String toString(int algorithm){ d `j?7Z
return name[algorithm-1]; {5Eyr$
} !U BVPR*
5]7&IDA]]9
public static void sort(int[] data, int algorithm) { '5};M)w
impl[algorithm-1].sort(data); 3D)b*fPc
} .dI)R40L/\
~4)Y#IxL
public static interface Sort { X^< >6|)
public void sort(int[] data); 16@);Ot
} "A]Y~iQ
zfjTQMaxh
public static void swap(int[] data, int i, int j) { (:Cc3
int temp = data; (G4'(6
data = data[j]; $Kq<W{H3ut
data[j] = temp; B;-2$ 77
} b Dg9P^<n
} G^Xd-7 GQ