[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; q$e T!'x
} $K=K?BV[
int i1=l; $#6Fnhh}
int i2=mid+1; k+W
for(int cur=l;cur<=r;cur++){ u!=]zW%
if(i1==mid+1) >=.ch5h3J)
data[cur]=temp[i2++]; ?K= gg<
else if(i2>r) GM34-GH+
data[cur]=temp[i1++]; Vvxc8v:
else if(temp[i1] data[cur]=temp[i1++]; O+CF/ipX/
else @c.11nfn`
data[cur]=temp[i2++]; $bF`PGR_
} YHwVj?6W
} BDv|~NHs
}w|=c>'_}
} Hl4vLx@
&F@tmM~
改进后的归并排序: '=@-aVp
_*OaiEL+:
package org.rut.util.algorithm.support; *@b~f&Lx6
hW*^1%1
import org.rut.util.algorithm.SortUtil; bTA14&&q
$6Q2)^LJ
/** 7LyV`6{70
* @author treeroot cOj +}Hz58
* @since 2006-2-2 V^/h;/!^
* @version 1.0 0C4*F
*/ IdN%f]=/
public class ImprovedMergeSort implements SortUtil.Sort { ":(Cpf0
UcKWa>:Fi
private static final int THRESHOLD = 10; rm7*l<v6
'tq\<y
/* }RC.Q`b
* (non-Javadoc) 4nVO.Ud0$X
* V!yp@%D
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Q!BkS=H30K
*/ -7C=- \]
public void sort(int[] data) { (AyRs7Dkn
int[] temp=new int[data.length]; hs -}:^S`
mergeSort(data,temp,0,data.length-1); #U6/@l)
} bOnukbJ
3V8j>&
private void mergeSort(int[] data, int[] temp, int l, int r) { b_)QBE9
int i, j, k; {4V:[*3
int mid = (l + r) / 2; (<5'ceF)X
if (l == r) B8BY3~}]
return; ]%ZjD
if ((mid - l) >= THRESHOLD) $AL|d[[T[
mergeSort(data, temp, l, mid); IAt+S-q0
else N8/Au=De_
insertSort(data, l, mid - l + 1); Ed ?Yk* 4
if ((r - mid) > THRESHOLD) D%5 {A=
mergeSort(data, temp, mid + 1, r); YA/H;707l
else W+-f `
insertSort(data, mid + 1, r - mid); mtHi9).,y|
/ab K/8ZQ
for (i = l; i <= mid; i++) { E`sapk
temp = data; e2VL/>y`
} l#J>It\
for (j = 1; j <= r - mid; j++) { $D2Ain1
temp[r - j + 1] = data[j + mid]; *(XgUJq+
} c+\Gd}IJq
int a = temp[l]; QKL]O*
int b = temp[r]; QVA!z##
for (i = l, j = r, k = l; k <= r; k++) { HjETinm"
if (a < b) { J[_?>YJ
data[k] = temp[i++]; 4=#QN
a = temp; #!F8n`C-
} else { s3fGX|;
data[k] = temp[j--]; @%5F^Vbd
b = temp[j]; @)M.u3{\
} `(w kqa
} 0^-b}
} (HP={MrV
"p_[A
/** 5"Xo R)
* @param data 6b1 Uj<
* @param l mhHm#
* @param i R}=]UOqH-
*/ m<VL19o>R
private void insertSort(int[] data, int start, int len) { B+e~k?O]1
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); xX67bswG
} WY ^K7U
} BfO}4
} :Q%yW%St$
} )="g?E3
gs2&0rnOy\
堆排序： 4QN6BZJ5
v|hKf6
package org.rut.util.algorithm.support; Bg 8t'dw?K
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import org.rut.util.algorithm.SortUtil; *SpO|*'
:d/:Ga5v!
/** <i`K%+<WO
* @author treeroot E<.{ v\
* @since 2006-2-2 JjL0/&
* @version 1.0 61 HqBa
*/ =F;^^VX
public class HeapSort implements SortUtil.Sort{ 7[VCCI g
\?Oa}&k$F8
/* (non-Javadoc) Ub-k<]yZ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9R<J$e
*/ ,HjHt\!~<
public void sort(int[] data) { Z{>Y':\?<
MaxHeap h=new MaxHeap(); z8MpE
h.init(data); -ZMl[;OM
for(int i=0;i h.remove(); <H(AS'
System.arraycopy(h.queue,1,data,0,data.length); # v/aI*Rl
} Pp")hFx
Szob_IEq,
private static class MaxHeap{ RI].LB_
Tr+Y@]"
void init(int[] data){ os0"haOI9h
this.queue=new int[data.length+1]; 'G By^hj?
for(int i=0;i queue[++size]=data; )I1V2k$n
fixUp(size); m+JGe5fR<
} :y)&kJpleP
} N_~Wu
v,O&UrZ
private int size=0; 4iB)oR
3_['[}
private int[] queue; a>e 1jM[
2LK*Cv[
public int get() { jZgnt{
return queue[1]; `[R:L.H1
} UM;bVf?
Xv;ZAa
public void remove() { AFnlt
SortUtil.swap(queue,1,size--); REe%>|
fixDown(1); @ F"ShT0
} 7qdl,z
file://fixdown "gVH;<&]
private void fixDown(int k) { w2_I/s6B
int j; v6(l#,
while ((j = k << 1) <= size) { gl4 f9Ff
if (j < size %26amp;%26amp; queue[j] j++; )e$-B]>7z
if (queue[k]>queue[j]) file://不用交换 ~<Qxw>S#
break; s#CEhb
SortUtil.swap(queue,j,k); !haXO
k = j; 5|H(N}S_
} t@mw f3,
} 5+PBS)pJ]%
private void fixUp(int k) { /VOST^z!
while (k > 1) { RAJ|#I1
int j = k >> 1; Kwmo)|7uPU
if (queue[j]>queue[k]) ;bu;t#
break; XsCbJ[Z_?q
SortUtil.swap(queue,j,k); 8YkH
k = j; i7E7%~S
} i}12mjF
} rs)aEmvC
xH.q
} krT!AfeV
dtXJ<1:
} dEl3?~
)HiTYV)]'
SortUtil： nWg)zj:
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package org.rut.util.algorithm; YV+dUvz
s%re>)=|
import org.rut.util.algorithm.support.BubbleSort; *" +cP!
import org.rut.util.algorithm.support.HeapSort; rb4g<f|
import org.rut.util.algorithm.support.ImprovedMergeSort; "pJEzC
import org.rut.util.algorithm.support.ImprovedQuickSort; :BiR6>1:
import org.rut.util.algorithm.support.InsertSort; ymJw{&^am
import org.rut.util.algorithm.support.MergeSort; B~?Q. <M
import org.rut.util.algorithm.support.QuickSort; Z#t.wWSq
import org.rut.util.algorithm.support.SelectionSort; E<[ bgL
import org.rut.util.algorithm.support.ShellSort; Hm[!R:HW,S
3^Q U4
/** B$eF@v"
* @author treeroot Al;oI3
* @since 2006-2-2 G~j<I/)"
* @version 1.0 omU)hFvyS
*/ 6>^k9cJp
public class SortUtil { m.X+sP-e
public final static int INSERT = 1; H%jIjf
public final static int BUBBLE = 2; 4E94W,1%,Y
public final static int SELECTION = 3; LPgI"6cP
public final static int SHELL = 4; .EELR]`y7I
public final static int QUICK = 5; +m},c-,=$w
public final static int IMPROVED_QUICK = 6; >dH*FZ:c
public final static int MERGE = 7; Uv$u\D+@[
public final static int IMPROVED_MERGE = 8; Oc3%pb;
public final static int HEAP = 9; {:j!@w3
d|HM
public static void sort(int[] data) { f@X*Tlx^|
sort(data, IMPROVED_QUICK); _\6(4a`,
} M?CMN.Dw
private static String[] name={ zIm!8a
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" &xT~;R^
}; ZX}"
)4C6+63OD&
private static Sort[] impl=new Sort[]{ #.xTAvD
new InsertSort(), Q";eyYdOL
new BubbleSort(), b,sc
new SelectionSort(), )xs,
new ShellSort(), j ZafwBi
new QuickSort(), y`dzo`f
new ImprovedQuickSort(), (NlEb'~+
new MergeSort(), [Y~s
new ImprovedMergeSort(), a-hGpYJJG
new HeapSort() H(m+rk
}; Um|Tf]q
|a\TUzq
public static String toString(int algorithm){ )SLs [
return name[algorithm-1]; Q*(C)/QW
} Bbp9Q,4
bS"M*
public static void sort(int[] data, int algorithm) { {NDe9V5
impl[algorithm-1].sort(data); ~;s)0M
} 00TdX|V`
6S&YL
public static interface Sort { |`/uS;O
public void sort(int[] data); m^+~pC5
} YtQWArX,
N$b;8F
public static void swap(int[] data, int i, int j) { I'YotV7
int temp = data; MPc=cLv
data = data[j]; uwzT? C A6
data[j] = temp; K>6p5*&
} SW,Po>Y
} a^,RbV/