[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; }UWRH.;v
} Jid:$T>
int i1=l; k||DcwO
int i2=mid+1; rJm%qSZz
for(int cur=l;cur<=r;cur++){ QcQ|,lA.HI
if(i1==mid+1) @V-CG!
data[cur]=temp[i2++]; FR@ dBcJUU
else if(i2>r) cBA2;5E
data[cur]=temp[i1++]; 0IM#T=V
else if(temp[i1] data[cur]=temp[i1++]; ]g;K_>@
else 7e"(]NC84
data[cur]=temp[i2++]; M O/-?@w
} 3,B[%!3d
} AH],>i3
",rA
} ~dwl7Qc
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改进后的归并排序: vu.f B4
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package org.rut.util.algorithm.support; .9g\WH#qD|
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import org.rut.util.algorithm.SortUtil; )V}u1C-N
\ca4X{x
/** [P{Xg:0
* @author treeroot $P@P}%2
* @since 2006-2-2 +T^m
* @version 1.0 "v3u$-xN1
*/ 9H3#8T] ;
public class ImprovedMergeSort implements SortUtil.Sort { }Gz"og*8
RGtUKr'
private static final int THRESHOLD = 10; =4MiV]
Qg _?..%
/* 6<t\KMd
* (non-Javadoc) T+4Musu{V
* g%=\Wiit]
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) qW<: `y
*/ 8a)EL*LH`
public void sort(int[] data) { d*>M<6b-
int[] temp=new int[data.length]; }}(~'
mergeSort(data,temp,0,data.length-1); Qw5M\
} ~0 FqY&4
O.K8$
private void mergeSort(int[] data, int[] temp, int l, int r) { KQ9:lJKr
int i, j, k; SKfv.9
int mid = (l + r) / 2; iy: ;g
if (l == r) >v<}$v6D~
return; H[Pb Wy:
if ((mid - l) >= THRESHOLD) cW GU?cv}
mergeSort(data, temp, l, mid); KuI>:i;
else Mc6Cte]3|
insertSort(data, l, mid - l + 1); %""CacX
if ((r - mid) > THRESHOLD) *BO4"3Z
mergeSort(data, temp, mid + 1, r); Mm[%v t40
else {G{@bUG]p
insertSort(data, mid + 1, r - mid); 'b^:"\t'Rh
Vd1K{rH#
for (i = l; i <= mid; i++) { *<A;jP
temp = data; [X~X?By>
} q3P3euK3
for (j = 1; j <= r - mid; j++) { 4rzioIk
temp[r - j + 1] = data[j + mid]; O@=mN*<gg0
} "4?hK
int a = temp[l]; iN{TTy
int b = temp[r]; 7:p]~eM)
for (i = l, j = r, k = l; k <= r; k++) { bA^a@ lv a
if (a < b) { ^LcI6h
data[k] = temp[i++]; =4%C?(\
a = temp; lb6s3b
} else { 8 [."%rzN
data[k] = temp[j--]; EqmJXDm
b = temp[j]; 6aK--k
} JZnWzqFw
} &4%J35~
} .6;B3
aw4+1.xy
/** P3 Evv]sB@
* @param data -$kJERvy
* @param l {pg@JA
* @param i 1!C,pXU#:
*/ @}Z/{Z[@
private void insertSort(int[] data, int start, int len) { G7202(w <
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ).boe& .
} $^XPk#$m
} H'`(|$:|
} U`Ag|R
} >V$#Um?AXj
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堆排序： 6K y;1$
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package org.rut.util.algorithm.support; H44&u](8{
D6oby*_w
import org.rut.util.algorithm.SortUtil; yfW^wyDd2o
j)DZmGg&t
/** <`*P/V
* @author treeroot Os!22 O
* @since 2006-2-2 kC5,yj
* @version 1.0 S}f<@-16P
*/ |*NrS<"
public class HeapSort implements SortUtil.Sort{ O*v+<|0!l
xwxjj
/* (non-Javadoc) QX=;,tr
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ]."c4S_)|
*/ 1Qu,]i`
public void sort(int[] data) { c):*R ]=
MaxHeap h=new MaxHeap(); 90ag!
h.init(data); $?-o
for(int i=0;i h.remove(); {wXN kq
System.arraycopy(h.queue,1,data,0,data.length); IpXhb[UZ?
} /xbZC{R
&RrQ()<as
private static class MaxHeap{ an`(?6d
d@4!^vD;
void init(int[] data){ s3Ce]MH
this.queue=new int[data.length+1]; 3/=QZ8HA&-
for(int i=0;i queue[++size]=data; Nt-SCLDM
fixUp(size); \=V[ba:q
} 5(7MQuRR
} 9prsL#Fn
JwtI(>cI
private int size=0; }2A1Yt:^P
[5*-V^m2
private int[] queue; si_HN{
c\{}FGC
public int get() { .l5"X>
return queue[1]; G)Bq?=P
} LC\:xia{X
s7i.p]
public void remove() { G?d,$NMo|
SortUtil.swap(queue,1,size--); %*q0+_
fixDown(1); mh7sY;SvM
} \g1@A"
file://fixdown },aWCvJL
private void fixDown(int k) { .^IhH|U
int j; x<\D@X^
while ((j = k << 1) <= size) { &N_c-@2O
if (j < size %26amp;%26amp; queue[j] j++; +Z<Q^5w@
if (queue[k]>queue[j]) file://不用交换 &qP-x98E?
break; [ky6E*dV`
SortUtil.swap(queue,j,k); ?b7g9 G4
k = j; UZ\*]mxT
} y*b.eO
} Cm;qDvj+u
private void fixUp(int k) { Gb|}Su
while (k > 1) { N[<`6dpE
int j = k >> 1; niHL/\7u
if (queue[j]>queue[k]) _6UAeZ*M
break; "SU-^z
SortUtil.swap(queue,j,k); H'GYJ ?U"
k = j; m_"p$m;
} a950M7
} zL},`:(.
(5q%0|RzRs
} Fv);5LD
A$%!9Cma
} hJ[mf1je=
Pb8Z))9j
SortUtil： IbJ[Og^Qyu
d[]p_oIQq
package org.rut.util.algorithm; [)SR$/A
\;*}zX
import org.rut.util.algorithm.support.BubbleSort; '#N5i
import org.rut.util.algorithm.support.HeapSort; MFH"$t+
import org.rut.util.algorithm.support.ImprovedMergeSort; jfY{z=*]u
import org.rut.util.algorithm.support.ImprovedQuickSort; C. Ja;RFq
import org.rut.util.algorithm.support.InsertSort; Lubs{-5lk
import org.rut.util.algorithm.support.MergeSort; GX@W"y
import org.rut.util.algorithm.support.QuickSort; fcE)V#c"g
import org.rut.util.algorithm.support.SelectionSort; t+ S~u^
import org.rut.util.algorithm.support.ShellSort; xEiX<lguyN
;sChxQ=.^
/** |#&V:GZp
* @author treeroot `B'4"=(
* @since 2006-2-2 $,;S\JmWP
* @version 1.0 .'S^&M/$
*/ ^b"bRQqm
public class SortUtil { MxgLztY
public final static int INSERT = 1; t[?a@S~6
public final static int BUBBLE = 2; =F'M~3M
public final static int SELECTION = 3; 2>$F0 M
public final static int SHELL = 4; %K^gUd>,R
public final static int QUICK = 5; \oB'
public final static int IMPROVED_QUICK = 6; 8jjFC9Cbn0
public final static int MERGE = 7; Vm~qk
public final static int IMPROVED_MERGE = 8; SH vaV[C
public final static int HEAP = 9; z+k=|RMau
$7UoL,N>
public static void sort(int[] data) { $U>/i@D
sort(data, IMPROVED_QUICK); g8I!E$
} 5pM&h~M
private static String[] name={ xJ~ gT
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Har~MO?A
}; qX5yN| A4
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private static Sort[] impl=new Sort[]{ (T|TEt
new InsertSort(), N-2([v
new BubbleSort(), Ufdl|smt1
new SelectionSort(), ^sifEgG*d
new ShellSort(), .hX0c"f]b
new QuickSort(), ^kn^CI6
new ImprovedQuickSort(), GIm " )}W
new MergeSort(), gB>imr#e&
new ImprovedMergeSort(), `KpFH.k.K
new HeapSort() bmOqeUgB
}; N0Efw$u
, 3X: )
public static String toString(int algorithm){ .xGo\aD
return name[algorithm-1]; =&A!C"qK4[
} 0#oBXu
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public static void sort(int[] data, int algorithm) { Kt W6AZJ
impl[algorithm-1].sort(data); B<|VeU
} }* QO]_U?
_eJXi,
public static interface Sort { T><{ze
public void sort(int[] data); 7}be>(
} q!6|lZB3
^GMJ~[]
public static void swap(int[] data, int i, int j) { 9W!8gCs
int temp = data; Hjs}
data = data[j]; ~U6"?
data[j] = temp; ' .B.V?7
} 4% HGMr
} A1^Ga5 B>