[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; G^c,i5}w
} 3Vk8'
int i1=l; 0JlNUO5Nt
int i2=mid+1; L`+[mX&2B
for(int cur=l;cur<=r;cur++){ T2e-RR
if(i1==mid+1) NHd@s#@
data[cur]=temp[i2++]; V:n0BlZ,B
else if(i2>r) Rt8[P6e"q
data[cur]=temp[i1++]; "V|Rq]_+%
else if(temp[i1] data[cur]=temp[i1++]; C`.YOkpj
else NL9.J@"b
data[cur]=temp[i2++]; 7>yd
} $plk>Khg
} ?2<) Jw
C]L)nCOBX
} !nBbt?*
W:r[o%B
改进后的归并排序: Cj0r2^`
t#NPbLZ
package org.rut.util.algorithm.support; ?qjdmB|w
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import org.rut.util.algorithm.SortUtil; HMq}){=S
]es|%j 2
/** ,&o9\|ih7]
* @author treeroot 8~'cP?
* @since 2006-2-2 7<j!qWm0
* @version 1.0 w S
*/ v$}^$8`
public class ImprovedMergeSort implements SortUtil.Sort { @@Q4{o
4:V +>Jt
private static final int THRESHOLD = 10; fQoAdw
)PN8HJAArh
/* .eJKIck
* (non-Javadoc) g0,~|.
* j7P49{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) lS=YnMs6a
*/ Pp?P9s{
public void sort(int[] data) { g#I`P&
int[] temp=new int[data.length]; s\*p|vc
mergeSort(data,temp,0,data.length-1); qCI&H7u@
} -h8mJ D%Oi
e@hPb$7
private void mergeSort(int[] data, int[] temp, int l, int r) { BbB3#/g
int i, j, k; IjhRSrCv
int mid = (l + r) / 2; 2f(`HSC'
if (l == r) :V9Q<B^
return; r9f- [wC
if ((mid - l) >= THRESHOLD) qZ<n\Mt
mergeSort(data, temp, l, mid); %`~4rf"7
else 6C$+D
insertSort(data, l, mid - l + 1); SlsNtaNt
if ((r - mid) > THRESHOLD) I(6%'s2
mergeSort(data, temp, mid + 1, r); S1r{2s&
else icG 9x
insertSort(data, mid + 1, r - mid); i}T*| P
AG >D,6Y
for (i = l; i <= mid; i++) { jnV#Q ;
temp = data; ],c0nz^%BR
} {JWixbA
for (j = 1; j <= r - mid; j++) { u/tJ])~@
temp[r - j + 1] = data[j + mid]; 9^Xndo]y
} !KV!Tkx h
int a = temp[l]; n l5+#e*\
int b = temp[r]; puOMtCI
for (i = l, j = r, k = l; k <= r; k++) { 51}C`j|V3{
if (a < b) { CQ!D{o=
data[k] = temp[i++]; Z{3=.z{&^=
a = temp; !jP[=
} else { o]0E
data[k] = temp[j--]; py$Gy-I~[
b = temp[j]; 5+GTK)D
} 9Zx| L/\
} +^:uPW^U
} T#E{d
#W:.Fsq
/** qRT5|\l
* @param data aR6~r^jB
* @param l K*~xy bA
* @param i , wk}[MF
*/ d/NjY[`5+
private void insertSort(int[] data, int start, int len) { i% 0qN
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); V^(W)\
} s2sJJdN
} QP%AJ[3ea%
} )~)T[S
} JNU9RxR
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堆排序： <a CzB7x
r 8N<<^
package org.rut.util.algorithm.support; T&dc)t`o
M!G/5:VZ
import org.rut.util.algorithm.SortUtil; RCkmxO;b&
"<oR.f=0
/** s]vsD77&
* @author treeroot Na\&}GSf^
* @since 2006-2-2 ;{m;CKHI
* @version 1.0 1\TkI=N3
*/ 9aID&b+
public class HeapSort implements SortUtil.Sort{ ~HctXe'x
LWo)x
/* (non-Javadoc) dn5t7D^x
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #,jm3Mqj
*/ PtjAu
public void sort(int[] data) { Ornm3%p+e
MaxHeap h=new MaxHeap(); 8v)Z/R-
h.init(data); _=w=!U&W
for(int i=0;i h.remove(); DUf. F
System.arraycopy(h.queue,1,data,0,data.length); ?r0>HvUf!l
} GyE5jh2
FN0<iL
private static class MaxHeap{ ]VVx2ERs
wh]v{Fi'
void init(int[] data){ FOa2VP%
this.queue=new int[data.length+1]; gZ(\/m8Z
for(int i=0;i queue[++size]=data; o>M&C X+j$
fixUp(size); $a')i<m^g
} %F*h}i
} Kn+B):OY+
(.M &nN'Ce
private int size=0; LZPLz@=&]
A*{V%7hs&
private int[] queue; GQkI7C
Jpe\
public int get() { }8'bXG+
return queue[1]; xqKj&RuLu
} ][Cg8
JOq&(AZe
public void remove() { Daf;; w
SortUtil.swap(queue,1,size--); d_Y7/_i
fixDown(1); j|WN!!7
} L6pw'1'
file://fixdown &C E){jC
private void fixDown(int k) { r/ LgmVRn
int j; w#$Q?u ,G
while ((j = k << 1) <= size) { Y&b JKX
if (j < size %26amp;%26amp; queue[j] j++; )e\IdKl=
if (queue[k]>queue[j]) file://不用交换 4q^'MZm1
break; _$qH\>se
SortUtil.swap(queue,j,k); I_h&35^t
k = j; 2G`tS=Un
} >^KO5N-:4
} .{#J2}+[_}
private void fixUp(int k) { 4}HY= 0Um
while (k > 1) { jUX0sRDk
int j = k >> 1; *1b)Va8v*
if (queue[j]>queue[k]) FAd4p9[Y
break; uyWt{>$
SortUtil.swap(queue,j,k); 1A\N$9Dls
k = j; 39,7N2uY
} Xkb\fR6<K
} %:]ive]e
S_56!
} kC-OZVoO
{`1gDKH
} 3At%TA:
b$1W>
SortUtil： .qk_m-o
6{PlclI !
package org.rut.util.algorithm; P>i[X0UnL
pbePxOG
import org.rut.util.algorithm.support.BubbleSort; J9*$@&@S
import org.rut.util.algorithm.support.HeapSort; gCY%@?YyN
import org.rut.util.algorithm.support.ImprovedMergeSort; r5g:#mF"
import org.rut.util.algorithm.support.ImprovedQuickSort; mXXU{IwUe
import org.rut.util.algorithm.support.InsertSort; 0_faJjTbP;
import org.rut.util.algorithm.support.MergeSort; f^?k?_~PN
import org.rut.util.algorithm.support.QuickSort; DNl'}K1W
import org.rut.util.algorithm.support.SelectionSort; o79EDPX
import org.rut.util.algorithm.support.ShellSort; W #kOcw
'l*p!=
/** 0'0GAh2
* @author treeroot &!5S'J%
* @since 2006-2-2 [GqQ6\
* @version 1.0 7[?{wbq
*/ V1Opp8
public class SortUtil { ij+)U`
public final static int INSERT = 1; zBTyRL l
public final static int BUBBLE = 2; TO~Z6NA0
public final static int SELECTION = 3; h#7p&F
public final static int SHELL = 4; .~t.B!rVSB
public final static int QUICK = 5; B6#^a
public final static int IMPROVED_QUICK = 6; Gm2q`ki
public final static int MERGE = 7; =9AX\2w*H;
public final static int IMPROVED_MERGE = 8; +=N#6#1
public final static int HEAP = 9; .>Fy ]Cqoh
.P^&sl*J
public static void sort(int[] data) { oi:!YVc
sort(data, IMPROVED_QUICK); 1Vy8TV3D
} 51&K
private static String[] name={ +<o}@hefY2
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" jZ\a:K?
}; lOuO~`,J
+XP9=U*g
private static Sort[] impl=new Sort[]{ /pS Y~*
new InsertSort(), }5qpiS"V9
new BubbleSort(), nWz7$O
new SelectionSort(), @nOj6b
new ShellSort(), %!r@l7<
new QuickSort(), ;*}tbh3;.
new ImprovedQuickSort(), :[C"}mR1
new MergeSort(), }a?(}{z-
new ImprovedMergeSort(), 6(0ME$
new HeapSort() JULns#tx}
}; f\U(7)2
R Q2DTQ-$
public static String toString(int algorithm){ a*(,ydF|L
return name[algorithm-1]; QxI^Bx
} #<*=)[
gql^Inx<
public static void sort(int[] data, int algorithm) { :qe.*\ c
impl[algorithm-1].sort(data); la}Xo0nq0+
} s5cY>
O=;}VZ<9
public static interface Sort { J,Rp&tavt:
public void sort(int[] data); F9PXQD(
} V krjs0
P4{!/&/
public static void swap(int[] data, int i, int j) { 9T;DFUM
int temp = data; o<8SiVC2
data = data[j]; *)u%KYGr
data[j] = temp; {&,MkWgG
} '}BYMEd/m%
} :-)H tyzf