[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; K\;4;6g
} &I8DK).M+
int i1=l; Wex2Fd?DO
int i2=mid+1; ED79a:
for(int cur=l;cur<=r;cur++){ b1i~F45h
if(i1==mid+1) x4wTQ$*1
data[cur]=temp[i2++]; wEX<[#a-
else if(i2>r) o -)[{o\
data[cur]=temp[i1++]; G!I5Er0pdy
else if(temp[i1] data[cur]=temp[i1++]; /j$pV
else @sZ7Ka
data[cur]=temp[i2++]; X@tA+
} I(7iD. ^:
} RHNAHw9
s[h;9 I1w
} ftPhE)i
^lZ7%6
改进后的归并排序: pKj:)6t"
Z]TQ+9t
package org.rut.util.algorithm.support; Y%eW6Y#
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import org.rut.util.algorithm.SortUtil; X o9vE3
j?]+~
/** $V?sD{=W
* @author treeroot 5WRqeSGh
* @since 2006-2-2 RfD#/G3|
* @version 1.0 t g-(e=S4P
*/ DBcR1c&<H
public class ImprovedMergeSort implements SortUtil.Sort { +4T.3Njjn
047PlS
private static final int THRESHOLD = 10; Vn{;8hZ:a
^OIo
/* ^q/^.Gf
* (non-Javadoc) ,P`GIGvkA
* ^b|? ?9&
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +MaEet
*/ GeB&S!F
public void sort(int[] data) { ?f'`b<o
int[] temp=new int[data.length]; Hmhsb2`\
mergeSort(data,temp,0,data.length-1); Y:m8UnT
} z2,NWmP|w
$yj*n;
private void mergeSort(int[] data, int[] temp, int l, int r) { Ti0kfjhX7
int i, j, k; !.O[@A\.-
int mid = (l + r) / 2; K,|3?CjS
if (l == r) GIpYx`mHi
return; y&8`NS#_p?
if ((mid - l) >= THRESHOLD) -@#],s7
mergeSort(data, temp, l, mid); xy!E_CuC$
else t5K#nRd Z:
insertSort(data, l, mid - l + 1); _:tS-Mx@5
if ((r - mid) > THRESHOLD) |4j6}g\
mergeSort(data, temp, mid + 1, r); Z+);}>-5
else dQ-g\]d|
insertSort(data, mid + 1, r - mid); |P|2E~[r
&Fuk+Cu{
for (i = l; i <= mid; i++) { [qkW/qS
temp = data; fB]2"(
} OiZ-y7;k^
for (j = 1; j <= r - mid; j++) { '@#(jY0_
temp[r - j + 1] = data[j + mid]; ~-lUS0duh
} )c9Xp:
int a = temp[l]; uBg#zx
int b = temp[r]; "oZ_1qi<
for (i = l, j = r, k = l; k <= r; k++) { <^{(?*
if (a < b) { Nr,I`x\N
data[k] = temp[i++]; GtIAsC03
a = temp; fQ!W)>mi
} else { u0oTqD?
data[k] = temp[j--]; T>#~.4A0
b = temp[j]; BOM0QskLf
} ,d_rK\J
} N!dBF t"
} $qZ6i
|HY{Q1%
/** 30Qp:_D
* @param data $qg2@X.
* @param l pMViq0
* @param i Q7v1xBM
*/ iRG6Cw2
private void insertSort(int[] data, int start, int len) { RX?!MDO
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 3%o}3.P,:@
} Lp|n)29+du
} y,n.(?!*
} xpuTh"ED
} j^U"GprA
p}gA8o
堆排序： B|9XqQ EI
xmC5uT6L3M
package org.rut.util.algorithm.support; N z=P1&G'
v<l]K$5J&
import org.rut.util.algorithm.SortUtil; AFYdBK]
]S9Z5l0
/** NhF"%
* @author treeroot f61vE
* @since 2006-2-2 /.A"HGAk
* @version 1.0 ZXiJ5BZ
*/ ' \>k7?@
public class HeapSort implements SortUtil.Sort{ *tR'K#:&g!
FrLv%tK|
/* (non-Javadoc) UEYJd&n0CB
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) C;U4`0=8
*/ awz.~c++
public void sort(int[] data) { 7)RvBcM
MaxHeap h=new MaxHeap(); OuWRLcJ!
h.init(data); ScVbo3{m*T
for(int i=0;i h.remove(); j!k$SDA-
System.arraycopy(h.queue,1,data,0,data.length); Nqd9)WQ
} N,VI55J:y>
En&gI`3n
private static class MaxHeap{ {dE(.Z?]!#
PGYx]r
void init(int[] data){ +tg${3ti_
this.queue=new int[data.length+1]; ta x:9j|~
for(int i=0;i queue[++size]=data; <)sL8G9Y
fixUp(size); *(]ZdB_2
} r_tt~|s,>
} 4sH?85=j
<KCyXU*
private int size=0; ubVZEsoW?
K g.O2F77
private int[] queue; `0q=Z],
7z/O#Fbs
public int get() { 4:b'VHW.
return queue[1]; @PQd6%@
} tk8\,!9Q
L@Qvj-5e
public void remove() { ?pd/cj^
SortUtil.swap(queue,1,size--); #RSUChe7w
fixDown(1); DZH2U+K
} Hm|N{
file://fixdown P39oHW
private void fixDown(int k) { "<)Jso|
int j; 4_'BoU4
while ((j = k << 1) <= size) { Wy/h"R\=
if (j < size %26amp;%26amp; queue[j] j++; \GioSg
if (queue[k]>queue[j]) file://不用交换 D,=#SBJ:Z
break; UFj!7gX]
SortUtil.swap(queue,j,k); DeT$4c*:[
k = j; ,TB$D]u8
} M&9urOa`
} 01RW|rN
private void fixUp(int k) { H}CmSo8&
while (k > 1) { q68m*1?y
int j = k >> 1; 7<B-2g
if (queue[j]>queue[k]) d:_;
break; d1 kE)R
SortUtil.swap(queue,j,k); ;/+U.I%z
k = j; ,i;#e
} ^%LyT!y
} ;$4&Qp:#
2hryY
} n)35-?R/M
'W("s
} %yl17:h#
A McZm0c`
SortUtil： a <F2]H=J
0B}2~}#
package org.rut.util.algorithm; 0O]v|
;, \!&o6
import org.rut.util.algorithm.support.BubbleSort; `(I$_RSE")
import org.rut.util.algorithm.support.HeapSort; *uy<Om
import org.rut.util.algorithm.support.ImprovedMergeSort; C'Y2kb
import org.rut.util.algorithm.support.ImprovedQuickSort; <Kl$ek8
import org.rut.util.algorithm.support.InsertSort; zE/\2F$
import org.rut.util.algorithm.support.MergeSort; 8`]yp7ueS
import org.rut.util.algorithm.support.QuickSort; DpT$19Q+
import org.rut.util.algorithm.support.SelectionSort; i*!2n1c[
import org.rut.util.algorithm.support.ShellSort; ga S}>?qk
\W= qqE]
/** fWi/mK3c
* @author treeroot V s=o@
* @since 2006-2-2 ?Drq!?3PDc
* @version 1.0 Ve)BF1YG
*/ z%lJWvaA7
public class SortUtil { 2\T\p<_20
public final static int INSERT = 1; @tD (<*f+
public final static int BUBBLE = 2; m_`%#$s}
public final static int SELECTION = 3; 'lu3BQvfh
public final static int SHELL = 4; )Z['=+s%
public final static int QUICK = 5; _G25$%/LU
public final static int IMPROVED_QUICK = 6; E7aG&K
public final static int MERGE = 7; n"Bc2}{
public final static int IMPROVED_MERGE = 8; :rjfAe=s
public final static int HEAP = 9; apfr>L3
iXvrZofE
public static void sort(int[] data) { ~gNFcJuy
sort(data, IMPROVED_QUICK); {0-rnSjC
} x)eoz2E1
private static String[] name={ MPw?HpM
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" S3E5^n\\
}; n5IQKYrg
/m 7~-~$V
private static Sort[] impl=new Sort[]{ Z{yH:{Vk
new InsertSort(), 0\@oqw]6hv
new BubbleSort(), ijzwct#.
new SelectionSort(), gxAy{ t
new ShellSort(), "VU/Ucb7
new QuickSort(), !H9^j6|
new ImprovedQuickSort(), WLfDXx2A
new MergeSort(), ae]6F_Qtc*
new ImprovedMergeSort(), d~{$,"!-f
new HeapSort() KNj~7aTp
}; 9tVV?Q@)
N>]J$[j
public static String toString(int algorithm){ #k`gm)|
return name[algorithm-1]; 8?YeaMIBB
} q(~|roKA(
jIH^
public static void sort(int[] data, int algorithm) { jiLJiYMg
impl[algorithm-1].sort(data); "dvo@n|
} hCd? Kti
eR6vO5to
public static interface Sort { <yBa5m@/
public void sort(int[] data); w1aoEo"S
} ylQj2B,CB
SO[ u4b_"h
public static void swap(int[] data, int i, int j) { xk7Dx}
int temp = data; *kYGXT,f]
data = data[j]; N#t`ZC&m'
data[j] = temp; MtN!Xx
} :XG~AR/
} %2g<zdab