[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; .EZ{d
} zXU{p\;)\
int i1=l; Y"rV[oe
int i2=mid+1; GE+csnA2
for(int cur=l;cur<=r;cur++){ Z3~*R7G8>
if(i1==mid+1) iT9Ex9RL
data[cur]=temp[i2++]; 2(J tD
else if(i2>r) zd4y5/aoS
data[cur]=temp[i1++]; w>BFgb?
else if(temp[i1] data[cur]=temp[i1++]; Hz3X*G\5b
else yBh"qnOT
data[cur]=temp[i2++]; `'.x*MNF
} <n#V
} Tv)y}
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} _rVX_
R eu J=|F
改进后的归并排序: D % ,yA
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package org.rut.util.algorithm.support; >d V@9
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import org.rut.util.algorithm.SortUtil; 2Wf qgR[3
mg/kyua^
/** b<78K5'
* @author treeroot <FT\u{9$
* @since 2006-2-2 5(`GF|
* @version 1.0 :!!`!*!JH
*/ hdqls0 r
public class ImprovedMergeSort implements SortUtil.Sort { /G+gk0FW
(jFE{M$-
private static final int THRESHOLD = 10; Jxw:Jk ~
<OfzE5
/* ZM, ^R?e
* (non-Javadoc) )qXe`3d5
* j|dzd<kE6
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) O t<%gj;^
*/ lG#&1
public void sort(int[] data) { o xu9v/
int[] temp=new int[data.length]; B4&pBiG&f6
mergeSort(data,temp,0,data.length-1); #e269FwN
} rL3Vogw'e
6mpUk.M"
private void mergeSort(int[] data, int[] temp, int l, int r) { bXLa~r4\
int i, j, k; >g0@ Bk
int mid = (l + r) / 2; :.df(1(RL
if (l == r) T-i]O*u
return; ;FflEL<7Y
if ((mid - l) >= THRESHOLD) zNJyF;3
mergeSort(data, temp, l, mid); :"IH*7xp
else 31Mc<4zI8
insertSort(data, l, mid - l + 1); :E`l(sI7J}
if ((r - mid) > THRESHOLD) I;:_25WGC
mergeSort(data, temp, mid + 1, r); j&GKpt
else $_5v^QL
insertSort(data, mid + 1, r - mid); l #z`4<
^:ngHue8~
for (i = l; i <= mid; i++) { |T&#"q,i9%
temp = data; 9GaER+d|
} @?? 6)C
for (j = 1; j <= r - mid; j++) { (1]@ fCd +
temp[r - j + 1] = data[j + mid]; Y @&nW
} \>7-<7+I6
int a = temp[l]; v"_#.!V
int b = temp[r]; +@7R,8
for (i = l, j = r, k = l; k <= r; k++) { (5;xs
if (a < b) { ]+9:i!s
data[k] = temp[i++]; P~Owvs/=
a = temp; L$Z_j()2
} else { S@($c'
data[k] = temp[j--]; dL)5~V8s
b = temp[j]; k]5L\]>y
} \Da$bJ
} %&(\dt&R1h
} "ZW*O{
[~S0b
/** !W^II>Y
* @param data $dw;Kj'\
* @param l -;z\BW5y
* @param i q)zvePO#
*/ f`J"A:
private void insertSort(int[] data, int start, int len) { a9-;8`fCR
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Z3{Qtysuv3
} ~zRd||qv
} 42LV>X#i
} +?tNly`
} wX;NU4)n
!!%F$qUd\
堆排序： W#\4"'=I
6V/mR~F1r
package org.rut.util.algorithm.support; li^E$9oWC
&>{L"{
import org.rut.util.algorithm.SortUtil; Ta$<#wb
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/** W>Kn*Dy8~
* @author treeroot VEm[F/'
* @since 2006-2-2 PeaD]
* @version 1.0 ElxbHQj6
*/ Y7HWf
public class HeapSort implements SortUtil.Sort{ OYy8u{@U:
JJXf%o0yq
/* (non-Javadoc) F$C:4c
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ppA8c6
*/ \g/E4U.+
public void sort(int[] data) { _`58G#z
MaxHeap h=new MaxHeap(); Jo]g{GX[
h.init(data); T^t`Hp
for(int i=0;i h.remove(); /qG?(3
System.arraycopy(h.queue,1,data,0,data.length); X3vrD{uNU
} 9'M({/7y
#a|5A:g%
private static class MaxHeap{ **"sru;@=
?jnEHn
void init(int[] data){ $[e*0!e
this.queue=new int[data.length+1]; FMiYZ1^r
for(int i=0;i queue[++size]=data; >n/QKFvV5
fixUp(size); @VFg XN
} 1Cthi[B
} ;x"B ):?\
Sw~<W%! ?
private int size=0; m6}"g[nN
iC">F.9#
private int[] queue; dc*#?G6^
=`")\?z}
public int get() { .KV?;{~q@
return queue[1]; +%^D)
} ~W4<M:R
-J:vYhq|g
public void remove() { Z|.. hZG
SortUtil.swap(queue,1,size--); ~ lS3+H
fixDown(1); &E~7ty'
} %pdfGM9g
file://fixdown 7)YU ;
private void fixDown(int k) { (fl2?d5+C
int j; );C !:?
while ((j = k << 1) <= size) { #~Q0s)Ze
if (j < size %26amp;%26amp; queue[j] j++; 5m/r,d^H
if (queue[k]>queue[j]) file://不用交换 iJAW| dw}
break; I]h+24_S
SortUtil.swap(queue,j,k); J_tJj8
k = j; %PQC9{hUy$
} 2ZnTT{]_m
} !&X}?NK
private void fixUp(int k) { PGJ?=qXr#
while (k > 1) { OTzh=Z^r
int j = k >> 1; [Gu]p&
if (queue[j]>queue[k]) r\yj$Gu>(
break; zOcMc{w0
SortUtil.swap(queue,j,k); SU:Cm:$
k = j; V%+KJ}S!Z
} b`IC)xN$
} ][9M_.
I".r`$XZ
} xH0Bk<`V:
{3?g8e]zr
} }=++Lr4*
,]+6kf5
SortUtil： GXwV>)!x
n'&WIf3
package org.rut.util.algorithm; c~cYNW:
9yQ[*
import org.rut.util.algorithm.support.BubbleSort; UJQ!~g.y]
import org.rut.util.algorithm.support.HeapSort; TJCoID7a8
import org.rut.util.algorithm.support.ImprovedMergeSort; btee;3`
import org.rut.util.algorithm.support.ImprovedQuickSort; /dCZoz~~T
import org.rut.util.algorithm.support.InsertSort; #fwG~Q(
import org.rut.util.algorithm.support.MergeSort; g{&ux k);
import org.rut.util.algorithm.support.QuickSort; \aG>(Mr
import org.rut.util.algorithm.support.SelectionSort; '&\km~&
import org.rut.util.algorithm.support.ShellSort; Qv8Z64#
+* &!u=%G
/** fO9e ;
* @author treeroot B}:[~R'
* @since 2006-2-2 1w35H9\g
* @version 1.0 EF}Z+7A
*/ ,cS|fG
public class SortUtil { ' e-FJ')|
public final static int INSERT = 1; %lvSO/F+
public final static int BUBBLE = 2; [IMa0qs'
public final static int SELECTION = 3; !X8:#a(
public final static int SHELL = 4; #T+%$q [:
public final static int QUICK = 5; jn]{|QZ
public final static int IMPROVED_QUICK = 6; W8\K_M}
public final static int MERGE = 7; !Y5O3^I=u
public final static int IMPROVED_MERGE = 8; Rj-<tR{
public final static int HEAP = 9; )wAqaG_d
<pz;G}
public static void sort(int[] data) { #Ez>]`]TB
sort(data, IMPROVED_QUICK); BK,=(;d3
} RTSg=
private static String[] name={ TfMuQi'>
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" /mvuSNk
}; D\>CEBt
\4mw>8wA
private static Sort[] impl=new Sort[]{ 9Y~A2C
new InsertSort(), iN_G|w[d
new BubbleSort(), c8#A^q}
new SelectionSort(), z!eY=G'
new ShellSort(), Uq7 y4zJ
new QuickSort(), ;g*ab
new ImprovedQuickSort(), Qu!Lc:oM?
new MergeSort(), \DpXs[1
new ImprovedMergeSort(), Q4C28-#
new HeapSort() J v'$6[?
}; |G{TA
:FB#,AOa_
public static String toString(int algorithm){ <$_B J2Z
return name[algorithm-1]; 59IxY ?
} Kt9:V,
!|hv49!H
public static void sort(int[] data, int algorithm) { MJb!+E+
impl[algorithm-1].sort(data); 90&ld:97
} UV$v:>K#
GRS[r@W[1
public static interface Sort { <S%M*j
public void sort(int[] data); q@H?ohIH
} l$z\8]x
g*TAaUs|n
public static void swap(int[] data, int i, int j) { B<x)^[<v
int temp = data; 0 @~[SXR
data = data[j]; s7#w5fe
data[j] = temp; O:WFh;c
} Pqi>,c<&mL
} 6*le(^y`