[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; s Hu~;)
} '@iS5Fni
int i1=l; ~J6c1jG
int i2=mid+1; dt 4_x1
for(int cur=l;cur<=r;cur++){ Ss&R!w9p
if(i1==mid+1) J~:/,'Ea
data[cur]=temp[i2++]; mYN|)QVKy
else if(i2>r) Cj}1 )qWq
data[cur]=temp[i1++]; .Tdl'y:..
else if(temp[i1] data[cur]=temp[i1++]; y@G5I>v
else ,bCPO`45
data[cur]=temp[i2++]; (yAQm pp
} t\]CdH`+
} HQ+:0"B
It4J\S
} Kl$!_$
s"G6aM
改进后的归并排序: ^=wG#!#V"1
b#.hw2?a`
package org.rut.util.algorithm.support; `W8GfbL
=1%3". "n@
import org.rut.util.algorithm.SortUtil; l\*}
J%;TK6
/** R)#D{/#FW
* @author treeroot 3 $Uv
* @since 2006-2-2 }{S W~yW
* @version 1.0 fdN-Zq@'
*/ N@^?J@#V
public class ImprovedMergeSort implements SortUtil.Sort { ])a?ri
]RQQg,|D
private static final int THRESHOLD = 10; A[ZJS
#T n~hnW
/* ^c^9kK'
* (non-Javadoc) BRV /7ao="
* t}`|\*a
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ]`y4n=L.
*/ Kig.hHj@
public void sort(int[] data) { `yHV10
int[] temp=new int[data.length]; pP)0 l
mergeSort(data,temp,0,data.length-1); /H,!7!6>?
} j+J)S1
r 06}@7
private void mergeSort(int[] data, int[] temp, int l, int r) { ?4_^}B9
int i, j, k; |jaUVE_2[
int mid = (l + r) / 2; &|26x >
if (l == r) U\ y?P:yy
return; Om{[ <tL
if ((mid - l) >= THRESHOLD) >NW /0'/
mergeSort(data, temp, l, mid); M\8FjJ>9
else 3`k1
insertSort(data, l, mid - l + 1); ho@f}4jhQ3
if ((r - mid) > THRESHOLD) ALwkX"AN
mergeSort(data, temp, mid + 1, r); *n2Q_o
else yIbz\3
insertSort(data, mid + 1, r - mid); M0x5s@
?U2ed)zzw
for (i = l; i <= mid; i++) { }jfU qqFd
temp = data; MlsF?"H p
} 9 YU7R)
for (j = 1; j <= r - mid; j++) { 7 4aap2^
temp[r - j + 1] = data[j + mid]; $[[6N0}*:
} or~o'
int a = temp[l]; B.K"1o
int b = temp[r]; VE6T&fz`
for (i = l, j = r, k = l; k <= r; k++) { yK0Q,
if (a < b) { EUe2<G
data[k] = temp[i++]; D_9&=aa'
a = temp; =6j 5,
} else { <Ky\^
data[k] = temp[j--]; }`Q'!_`
b = temp[j]; d^Ra1@0"q2
} #d*mG =
} KcfW+>W3
} V@84Cb
usR19_E-
/** z>&Py(
* @param data #:vosVqG
* @param l WMZa6cH
* @param i HQaKG4Z
*/ [lQp4xgxi
private void insertSort(int[] data, int start, int len) { ,ye>D='
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); %g0"Kj5
} ,^,Vq]$3
} ^;NM'Z
} 1B6Go
} +fAAkO*GP
. %tc7`k8
堆排序： ).N}x^
H<%7aOwO2
package org.rut.util.algorithm.support; 0[T!}F^%e
FD#?pVyPn^
import org.rut.util.algorithm.SortUtil; CTR|b}!
t_3)}
/** zScV 9,H1
* @author treeroot h^~eTi;c]Q
* @since 2006-2-2 ~0|~Fg
* @version 1.0 )(\5Wk9(
*/ A,lcR:@w
public class HeapSort implements SortUtil.Sort{ =a?l@dI]
^P:9iu)+]~
/* (non-Javadoc) `\q4z-<-
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) j"_V+)SD
*/ p."pI Bd
public void sort(int[] data) { Zj~tUCc
MaxHeap h=new MaxHeap(); T {(6*^g<B
h.init(data); ?O\n!c
for(int i=0;i h.remove(); 6VQ*z8wLw
System.arraycopy(h.queue,1,data,0,data.length); =35EG{W(
} #TZYe4#f
8_Y{7;<ey
private static class MaxHeap{ ]Vl*!,(i
%I(N
void init(int[] data){ =^q:h<
this.queue=new int[data.length+1]; O<iE,PN)
for(int i=0;i queue[++size]=data; r&1N8o
fixUp(size); e@Z(z^V
} AvEJX0"\df
} JF%+T yMe
*J8j_-i,R
private int size=0; g}$]K!F
WsJ3zZc
private int[] queue; #R305
3r+vpyu
public int get() { =o{zw+|% %
return queue[1]; ',kYZay
} Xn$]DE/r}N
4eBM/i
public void remove() { ub+>i
SortUtil.swap(queue,1,size--); 0RYh4'=F
fixDown(1); bX|Z||img
} ~e~4S~{
file://fixdown D>?%p"e
private void fixDown(int k) { lp!@uoN^T
int j; DD"]as"#
while ((j = k << 1) <= size) { <z%zzc1s
if (j < size %26amp;%26amp; queue[j] j++; "p#mNc
if (queue[k]>queue[j]) file://不用交换 hKQT,
break; Z)62/`C)
SortUtil.swap(queue,j,k); C%}FVO\c
k = j; 2Ev~[Hb.
} o8 q@rwu3
} :~zK0v"
private void fixUp(int k) { 9i yNR!
while (k > 1) { d@7 ]=P:
int j = k >> 1; WkXa%OZ
if (queue[j]>queue[k]) 2P!Pbl<
break; s7(mNpo
SortUtil.swap(queue,j,k); R\A5f\L9
k = j; iW-w?!>|m
} 2[r#y1ro
} k U*\Fa*E
d=xU f`^
} O6Xu/X]
4}W*,&_
} #&1mc_`/
4@/[aFH
SortUtil： h[ba$S,T
z1T.\mzfX
package org.rut.util.algorithm; $w)yQ %
Rl.3p<sX
import org.rut.util.algorithm.support.BubbleSort; SEIGs_^'\
import org.rut.util.algorithm.support.HeapSort; Q;)[~p
import org.rut.util.algorithm.support.ImprovedMergeSort; 'F5&f9A
import org.rut.util.algorithm.support.ImprovedQuickSort; 8nt:peJ$+
import org.rut.util.algorithm.support.InsertSort; #)GL%{Oa
import org.rut.util.algorithm.support.MergeSort; ^7Z)/c`"
import org.rut.util.algorithm.support.QuickSort; \[B5j0vV,
import org.rut.util.algorithm.support.SelectionSort; &P&M6v+
import org.rut.util.algorithm.support.ShellSort; Zh{Pzyp
yJppPIW^
/** dE.R$SM
* @author treeroot flVQG@
* @since 2006-2-2 p#qQGJe
* @version 1.0 9Fv1D
*/ XBF#ILJ
public class SortUtil { owmV7E1
public final static int INSERT = 1; |@sUN:G4k
public final static int BUBBLE = 2; L'H'E,
public final static int SELECTION = 3; 52C>f6w
public final static int SHELL = 4; `rbTB3?
public final static int QUICK = 5; t}c ymX~
public final static int IMPROVED_QUICK = 6; BCJo/m
public final static int MERGE = 7; (}V.xi
public final static int IMPROVED_MERGE = 8; '.c[7zL
public final static int HEAP = 9; Ldf<
rt_%_f>qd
public static void sort(int[] data) { =n cu#T]
sort(data, IMPROVED_QUICK); pTprU)sa7
} [_G_Wl'#8
private static String[] name={ pBL,kqYNA>
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ^QpP'
}; 2h IM!wQ
Uk`ym
private static Sort[] impl=new Sort[]{ i'H{cN6
new InsertSort(), {SY@7G]
new BubbleSort(), ~ZweP$l
new SelectionSort(), ]EnB`g(4;
new ShellSort(), E<:XHjm
new QuickSort(), ?k TVC
new ImprovedQuickSort(), }cn46L%/
new MergeSort(), `J'xVq#O
new ImprovedMergeSort(), *l)_&p
new HeapSort() ?S~HnIn
}; dPc*!xrq
}JeGjpAcV
public static String toString(int algorithm){ g"EvMv&
return name[algorithm-1]; 4&r[`gL
} Xx~OZ^t&Vn
hxP%m4xF +
public static void sort(int[] data, int algorithm) { 5k)QjZo
impl[algorithm-1].sort(data); a:r8Jzr
} f-F+Y`P
3=RVJb
public static interface Sort { ?T3zA2
public void sort(int[] data); ^ r-F@$:.
} }3E@]"<cVR
Oz'x5/%G
public static void swap(int[] data, int i, int j) { EcxPbRg
int temp = data; <1YINkRz
data = data[j]; :1^ R$0d
data[j] = temp; $A;jl`ng
} UOJx-o!c?
} B8F.}M-!