[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; vkt)!hl `
} q g%<>B&"
int i1=l; tGf
int i2=mid+1; :^ cA\2=
for(int cur=l;cur<=r;cur++){ %*s[s0$c
if(i1==mid+1) \}<nXn!
data[cur]=temp[i2++]; ]"YG7|EU
else if(i2>r) yXEC@#?|
data[cur]=temp[i1++]; Z>X-ueV
else if(temp[i1] data[cur]=temp[i1++]; -AffKo
else XDI@mQmzB
data[cur]=temp[i2++]; SgY>$gP9S
} `Zk?.1*2/
} c^=,@#
!D6@\
} HZP`u >.
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改进后的归并排序: Y)a 7osML
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package org.rut.util.algorithm.support; a]ftE\99
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import org.rut.util.algorithm.SortUtil; "C0oFRk
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/** xUeLX`73
* @author treeroot F-ijGGL#
* @since 2006-2-2 (^6SF>'
* @version 1.0 N:d" {k
*/ Q}m)Q('Rk
public class ImprovedMergeSort implements SortUtil.Sort { K}wUM^
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private static final int THRESHOLD = 10; k|g~xmI;
IPY@9+]
/* M<)HJ lr
* (non-Javadoc) gGZ$}vX
* GbMSO
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) zx\?cF
*/ YxsWY7J
public void sort(int[] data) { g@S"!9[;U
int[] temp=new int[data.length]; G_X'd
mergeSort(data,temp,0,data.length-1); ci*Z9&eS+
} ^c-1wV`/
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private void mergeSort(int[] data, int[] temp, int l, int r) { p~M^' k=d
int i, j, k; 0mCrA|A.
int mid = (l + r) / 2; yTmoEy. q
if (l == r) yuhSP{pv'
return; Jj([O2Eq$
if ((mid - l) >= THRESHOLD) u/``*=Y@
mergeSort(data, temp, l, mid); ft$/-;
else m+V'*[O{
insertSort(data, l, mid - l + 1); O@EpRg1
if ((r - mid) > THRESHOLD) ^TDHPBlG
mergeSort(data, temp, mid + 1, r); JA1(yt
else 4wK!)Pwq
insertSort(data, mid + 1, r - mid); WF:i}+g+^
G-T:7
for (i = l; i <= mid; i++) { ,!Q2^R
temp = data; CM~)\prks
} 0A|.ch
for (j = 1; j <= r - mid; j++) { f4:gD*YT
temp[r - j + 1] = data[j + mid]; /tV)8pEj
} PCD1I98
int a = temp[l]; Pirc49c
int b = temp[r]; 4m%_#J{
for (i = l, j = r, k = l; k <= r; k++) { pYVQ-r%QF
if (a < b) { ku?i[Th
data[k] = temp[i++]; i"zWv@1z
a = temp; CFn!P;.!
} else { r6j 3A
data[k] = temp[j--]; 5]gd,&^?>
b = temp[j]; ZG<<6y*.
} hPH=.rX
} UX(#C,qgG
} 9r8*'.K`Z
Q7f\ 5QjT
/** gP)g_K(e
* @param data DmPp&
* @param l K~C*4H:9
* @param i dRt]9gIsx
*/ +MXI;k_
private void insertSort(int[] data, int start, int len) { _kgw+NA&-H
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); wD"Y1?Mr
} \~U8<z
} q]<cn2
} gNN{WFHQX:
} $c[8-=
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堆排序： ZOfyy E
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package org.rut.util.algorithm.support; ,%yjEO
vA:1z$m
import org.rut.util.algorithm.SortUtil; X8p-VCkV
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/** Ll%[}C?~]?
* @author treeroot $^}?98m
* @since 2006-2-2 }"%tlU!}
* @version 1.0 i,Yv
*/ quVTqhg"
public class HeapSort implements SortUtil.Sort{ vt@.fT#e
yw$er?
/* (non-Javadoc) }M * Oo
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) &+d>xy\^/
*/ ojUBa/
public void sort(int[] data) { j:\MrYt0H
MaxHeap h=new MaxHeap(); i\2~yXw\
h.init(data); Z6A*9m
for(int i=0;i h.remove(); ]xfu@''
System.arraycopy(h.queue,1,data,0,data.length); Tf<1Z{9
} F3i+t+Jt
Hq3"OMGq
private static class MaxHeap{ X^eTf-*T
|Fm(
void init(int[] data){ OT&J OTk\
this.queue=new int[data.length+1]; hK&jo(V
for(int i=0;i queue[++size]=data; m "h{HgJd
fixUp(size); seB ^o}
} a9`E&Q}z
} v&D^N9hy9
tc.R(F96
private int size=0; 5ZSV)$t
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private int[] queue; 7q^osOj"
y08.R. l
public int get() { |Xlpgdiu
return queue[1]; 4(f[Z9 iZ]
} db'Jl^
Zchs/C 9{
public void remove() { @GK0j"_
SortUtil.swap(queue,1,size--); /Z94<}C6b
fixDown(1); nGZZCsf <
} %l(qyH)*
file://fixdown [?Wt ZM^q
private void fixDown(int k) { GBFYa6\4sT
int j; mADq_`j
while ((j = k << 1) <= size) { d@<(Z7|
if (j < size %26amp;%26amp; queue[j] j++; 3Gubq4r
if (queue[k]>queue[j]) file://不用交换 "k o?AUt
break; =c"`>Vi@d
SortUtil.swap(queue,j,k); MuQyHEDF
k = j; uckag/tv
} yF8 av=<{
} K*xqQ]&
private void fixUp(int k) { 6-c3v
while (k > 1) { :GBWQXb G
int j = k >> 1; 3&^4%S{/
if (queue[j]>queue[k]) 0,1:l3iu1M
break; N.vt5WP
SortUtil.swap(queue,j,k); M,7A|?O
k = j; 0&mOu #l
} ELZCrh6*
} 3Un q 9
n,q+EZd
} }1VxMx@
]d=SkOq
} L<'3O),}
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SortUtil： BT.;l I
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package org.rut.util.algorithm; O0`sg90,C
rlEEf/m:
import org.rut.util.algorithm.support.BubbleSort; o{f|==<t3#
import org.rut.util.algorithm.support.HeapSort; ACxOC2\n
import org.rut.util.algorithm.support.ImprovedMergeSort; q|;_G#4
import org.rut.util.algorithm.support.ImprovedQuickSort; 61L vT"
import org.rut.util.algorithm.support.InsertSort; MF)Xc\}0p
import org.rut.util.algorithm.support.MergeSort; RB`Emp&T
import org.rut.util.algorithm.support.QuickSort; GVP"~I~/:
import org.rut.util.algorithm.support.SelectionSort; ]r8t^bqe
import org.rut.util.algorithm.support.ShellSort; CZe0kH^:{
qpjtF'
/** Ab ,n^
* @author treeroot ;jS2bc:8a
* @since 2006-2-2 Y&!M#7/'J3
* @version 1.0 xOnbYU
*/ |WqEJ*$,
public class SortUtil { r2M Iw
public final static int INSERT = 1; (&HAjB
public final static int BUBBLE = 2; (L}
public final static int SELECTION = 3; rH Et]Xa
public final static int SHELL = 4; FKRO0%M4}Z
public final static int QUICK = 5; #}*w &y
public final static int IMPROVED_QUICK = 6; |h$*z9bsf
public final static int MERGE = 7; KE!aa&g
public final static int IMPROVED_MERGE = 8; `@1y|j:m
public final static int HEAP = 9; lO3W:,3_a
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public static void sort(int[] data) { AlT41v~6
sort(data, IMPROVED_QUICK); 2[6>h)
} ky>0
private static String[] name={ 3NAU|//J
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" $8zsqd 4?
}; K=T]@ix$
&~gqEl6RF
private static Sort[] impl=new Sort[]{ ^L#\z7
new InsertSort(), k`FCyO
new BubbleSort(), `]%\Y>(a}
new SelectionSort(), +EK(r@eV
new ShellSort(), 5{/CqUIl
new QuickSort(), XHU&ix{Od
new ImprovedQuickSort(), hiO:VA
new MergeSort(), A`_(L|~
new ImprovedMergeSort(), kzU;24"K
new HeapSort() U'(}emh}
}; E`s9SE
3jR,lEJyj
public static String toString(int algorithm){ {,EOSta
return name[algorithm-1]; l,AK
} DY1?37h
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public static void sort(int[] data, int algorithm) { 64xq@_+
impl[algorithm-1].sort(data); =+;1^sZ
} ^T*^L=L_(
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public static interface Sort { dJID '2a
public void sort(int[] data); Xvu|ss
} y Nb&;E7 H
/xf4*zr
public static void swap(int[] data, int i, int j) { :a$ZYyD
int temp = data; *%<Ku&C
data = data[j]; YF/@]6j
data[j] = temp; {T|sU\|Q
} ZfalB
} U U!M/QJ