[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; {fd/:B 7T
} hXAgT!ZD
int i1=l; "d5nVO/
int i2=mid+1; d:<</ah
for(int cur=l;cur<=r;cur++){ rd )_*{
if(i1==mid+1) G5l?c@o
data[cur]=temp[i2++]; uGoySt&;(
else if(i2>r) c}-ADr9
data[cur]=temp[i1++]; 5%6{ ePh{
else if(temp[i1] data[cur]=temp[i1++]; V/t/uNm
else *ku}.n
data[cur]=temp[i2++]; ',_E;(
} n%Rl$
} $~;h}I
-J6G=+s/
} K|Cb6''
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改进后的归并排序: ELvP<Ny}
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package org.rut.util.algorithm.support; Z[Z3x6 6
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import org.rut.util.algorithm.SortUtil; 0[ BPmO6
t@#l0lu$
/** Au\j6mB
* @author treeroot =xs"<Q*w>
* @since 2006-2-2 RE<s$B$[
* @version 1.0 ,N1I\f
*/ /0_^Z2
public class ImprovedMergeSort implements SortUtil.Sort { cWU9mzsE
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private static final int THRESHOLD = 10; 5R%4fzr&g
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/* nOQvBc
* (non-Javadoc) m>:zwz< ;
* \*+-Bm:$j
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) o,q47W=7$
*/ yQ03&{#
public void sort(int[] data) { o0)k5P~<~
int[] temp=new int[data.length]; Lu.C+zgQ
mergeSort(data,temp,0,data.length-1); @ L=dcO{r
} J$>9UCk7B
`zP{E T_Y
private void mergeSort(int[] data, int[] temp, int l, int r) { 9 *+X^q'
int i, j, k; w9aLTLv-
int mid = (l + r) / 2; H[DBL
if (l == r) vU9j|z
return; Z(|'zAb^
if ((mid - l) >= THRESHOLD) 3 q^^Os
mergeSort(data, temp, l, mid); X+%5q =N
else +oRBSAg-
insertSort(data, l, mid - l + 1); v;ZIqn"
if ((r - mid) > THRESHOLD) sQ aP:@
mergeSort(data, temp, mid + 1, r); F8pP(Wl
else isR)^fI|
insertSort(data, mid + 1, r - mid); 45(n!"u65
+?%LX4Y
for (i = l; i <= mid; i++) { [h0.k"&[
temp = data; *RllKPY)
} GE!fh1[[u
for (j = 1; j <= r - mid; j++) { q(s&2|
temp[r - j + 1] = data[j + mid]; W }
} -L6V)aK&
int a = temp[l]; Q13>z%Rge
int b = temp[r]; r^Mu`*x*
for (i = l, j = r, k = l; k <= r; k++) { Ls2g#+
if (a < b) { "/g\?Nce
data[k] = temp[i++]; T\OpPSYbl
a = temp; KM9)
} else { $gPR3*0
data[k] = temp[j--]; n:P++^ j
b = temp[j]; \1f&D!F]b
} =}1m.
} OaF[t*]D3
} s;Sv@=\
EHlkt,h*
/** W&s@2y?rF
* @param data LQ{z}Ay
* @param l qgkC)
* @param i ;hZ^zL
*/ x*a^msY%
private void insertSort(int[] data, int start, int len) { 7\<}378/^
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); HlgkW&}c^
} caD|*.b
} ~ \3j{pr
} nJr:U2d
} :p0<AU47
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堆排序： %^LwLyoVM
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package org.rut.util.algorithm.support; F- l!i/
=67tQx58
import org.rut.util.algorithm.SortUtil; E,gpi
Bxf]Lu,\U@
/** v[!ZRwk4w3
* @author treeroot S&z8-D=8k
* @since 2006-2-2 jA,|.P>
* @version 1.0 %Q.|qyq
*/ )mh,F#"L
public class HeapSort implements SortUtil.Sort{ Nu4PY@m]C
Kq&JvY^
/* (non-Javadoc) ?5Q_G1H&
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @mm~i~~KA
*/ :&\^r=D
public void sort(int[] data) { iT,Ya-9"
MaxHeap h=new MaxHeap(); =&x u"V
h.init(data); met`f0jw
for(int i=0;i h.remove(); Y<)9TU:D!
System.arraycopy(h.queue,1,data,0,data.length); ~0T,_N
} $(N+E,XB
wdLlQD
private static class MaxHeap{ cIB[D.
-,pw[R
void init(int[] data){ !+{$dB>a
this.queue=new int[data.length+1]; hNUkaP
for(int i=0;i queue[++size]=data; 0oNy
fixUp(size); t<H@c9{;*
} b6ui&Y8z
} cM;,nX%/
CMviR<.
private int size=0; Jknit
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private int[] queue; 353*D%8
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public int get() { vf/|b6'y
return queue[1]; Ek,$XH
} mY0FewwTy
*]+5T-R% $
public void remove() { rpMjDjW
SortUtil.swap(queue,1,size--); /~}<[6ZGCY
fixDown(1); .EdQ]c-E=
} >O/1Lpl.3
file://fixdown %P HYJc
private void fixDown(int k) { %?i~`0-:n%
int j; BU=;rz!;
while ((j = k << 1) <= size) { ZO\x|E!b
if (j < size %26amp;%26amp; queue[j] j++; ~ "stI
if (queue[k]>queue[j]) file://不用交换 ]Z=O+7(r
break; 0;n}{26a
SortUtil.swap(queue,j,k); p{W'[A{J .
k = j; `HV~.C
} 1azj%WY
} Gcp!"y=i
private void fixUp(int k) { "D[/o8Hk
while (k > 1) { Qzq3{%^x_
int j = k >> 1; ty-erdsP
if (queue[j]>queue[k]) fiZq C?(
break; y*7<tj.`b0
SortUtil.swap(queue,j,k); (\*+HZ`(Uu
k = j; hVf;{p &
} P`]p&:
} q-R'5p\C?|
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} j5~nLo2
apw/nhQ.[
} |]+PDc%
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SortUtil： [a!*m<
xG~7kj3
package org.rut.util.algorithm; &p_V<\(%
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import org.rut.util.algorithm.support.BubbleSort; $4u8"ne)
import org.rut.util.algorithm.support.HeapSort; ![3l K
import org.rut.util.algorithm.support.ImprovedMergeSort; %mr6p}E|
import org.rut.util.algorithm.support.ImprovedQuickSort; 84jA)
import org.rut.util.algorithm.support.InsertSort; .u\xA7X
import org.rut.util.algorithm.support.MergeSort; PCZ%<>v
import org.rut.util.algorithm.support.QuickSort; i;I!Jc_b'
import org.rut.util.algorithm.support.SelectionSort; hjx=?
import org.rut.util.algorithm.support.ShellSort; T)tf!v3v
K</="3 HK
/** b|E1>TkY
* @author treeroot CA5q(ID_
* @since 2006-2-2 X3l? YA
* @version 1.0 '-NHu +
*/ 'Z82+uU%
public class SortUtil { Vk?US&1q}
public final static int INSERT = 1; @zi_@B
public final static int BUBBLE = 2; $i;_yTht
public final static int SELECTION = 3; x A"V!8C
public final static int SHELL = 4; )Oix$B!-
public final static int QUICK = 5; D9;s%
public final static int IMPROVED_QUICK = 6; bXRSKp[$
public final static int MERGE = 7; (bD'SWE
public final static int IMPROVED_MERGE = 8; B0$.oavC
public final static int HEAP = 9; k.Q4oyei
6y
public static void sort(int[] data) { a n,$Z,G#K
sort(data, IMPROVED_QUICK); _&}z+(Ug
} <nbc RO.
private static String[] name={ d6+{^v$#
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 5~\GAjf
}; %W,V~kb
{bMOT*X=A
private static Sort[] impl=new Sort[]{ :,1kSM%r
new InsertSort(), ^zVW 3Y q
new BubbleSort(), >v1ajI>O&{
new SelectionSort(), #1<Jwt+
new ShellSort(), IfzZ\x .
new QuickSort(), -cs$E2 -
new ImprovedQuickSort(), D,&o=EU
new MergeSort(), Zg/ ],/`
new ImprovedMergeSort(), z%44@TP
new HeapSort() xay~fD
}; Ae|bAyAK
j,CVkA*DY
public static String toString(int algorithm){ ^Kfm(E
return name[algorithm-1]; 7]lUPLsl
} *!&,)''
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public static void sort(int[] data, int algorithm) { Rs;Y|W4'
impl[algorithm-1].sort(data); -Ta| qQa
} "d c- !
pu,|_N[xq8
public static interface Sort { uL9O_a;!
public void sort(int[] data); b_>x;5k
} u]jvXPE6
M:d} P
public static void swap(int[] data, int i, int j) { =v49[i
int temp = data; MKZq*
data = data[j]; >o|.0aw<
data[j] = temp; 3R6=C~
} w*krPaT3
} N`rz>6,k1