[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; #OH-LWZh
} D2~e@J(K
int i1=l; S(Xab_DT)H
int i2=mid+1; K3TMTY<p
for(int cur=l;cur<=r;cur++){ M=e]v9
if(i1==mid+1) w:&m_z#M
data[cur]=temp[i2++]; |qJQWmJO&U
else if(i2>r) X#-U
data[cur]=temp[i1++]; Ym-uElWo
else if(temp[i1] data[cur]=temp[i1++]; <r,l
else 4W~pAruwr
data[cur]=temp[i2++]; 9rtcI[&?0
} $ W(m
} gec<5Ewg
zMKW@
} Q,Hw@w<1
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改进后的归并排序: h{yqNl
goeWZO
package org.rut.util.algorithm.support; t&wtw
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import org.rut.util.algorithm.SortUtil; 2Q)"~3
rFSLTbTf
/** &2MW.,e7s
* @author treeroot (J][(=s;a
* @since 2006-2-2 wnP#.[,V
* @version 1.0 <Jo_f&&{
*/ <n>Kc}c
public class ImprovedMergeSort implements SortUtil.Sort { FlRbGg^
q/?#+d
private static final int THRESHOLD = 10; WsQo+Ua
0eQyzn*98
/* rcPP-+XW
* (non-Javadoc) W{At3Bfy
* [(w_!|S
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ^/2n[orl5
*/ P6zy<w
public void sort(int[] data) { WL7R.!P
int[] temp=new int[data.length]; 6?Rm>+2>v
mergeSort(data,temp,0,data.length-1); 'u{m37ZJ
} t*<.^+Vd
Lcf =)GL
private void mergeSort(int[] data, int[] temp, int l, int r) { I7nt<l!
int i, j, k; $&='&q
int mid = (l + r) / 2; S>aN#
if (l == r) ioIUIp+B~u
return; Z'>Xn^
if ((mid - l) >= THRESHOLD) WsTbqR)W%
mergeSort(data, temp, l, mid); ?7'uo$
else d90B15]gv
insertSort(data, l, mid - l + 1); M&~3fRb4
if ((r - mid) > THRESHOLD) =E8lpN'
mergeSort(data, temp, mid + 1, r); g9H~\w
else vdYd~>w
insertSort(data, mid + 1, r - mid); {%'(IJ|5z
Mje6Q
for (i = l; i <= mid; i++) { d3+pS\&IX?
temp = data; xpKD 'O=T
} !%_Z>a
for (j = 1; j <= r - mid; j++) { xXE/pIXw
temp[r - j + 1] = data[j + mid]; PtCwr)B,
} -wy$ ?Ha
int a = temp[l]; k+{-iPm{
int b = temp[r]; >o>r@;
for (i = l, j = r, k = l; k <= r; k++) { 4WG~7eIgy
if (a < b) { G?{BVWtl}
data[k] = temp[i++]; l&(,$RmYp
a = temp; 07DpvhDQ
} else { |rka/_
data[k] = temp[j--]; >lU[ lf+/
b = temp[j]; 4iBp!k7
} KY<>S/
} B@Ez,u5
} +#}I^N
:seo0w]
/** cXFNX<
* @param data QDRSQ[\
* @param l p\wE})mu
* @param i ``)ys^V
*/ j8$*$|
private void insertSort(int[] data, int start, int len) { E9;cd$}K
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); p[VBeO^%
} 6n]fr9f
} r ioNP(
} .dt7b4.kd
} _$s9o$8$
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堆排序： XL>cTM
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package org.rut.util.algorithm.support; M%7{g"J*
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import org.rut.util.algorithm.SortUtil; ;"hED:z6%
+u#;k!B/>
/** ykH?;Xu
* @author treeroot 8C#R
* @since 2006-2-2 jwgXq(
* @version 1.0 yjaX\Wb[z[
*/ 4P(Y34j
public class HeapSort implements SortUtil.Sort{ H-~V:OCB~
zdrCr0Rx,
/* (non-Javadoc) ,o& &d.
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ^&MMtWR
*/ $J>GCY
public void sort(int[] data) { dkt'~
MaxHeap h=new MaxHeap(); Mf Dna>,Y
h.init(data); w,cfSF;=tC
for(int i=0;i h.remove(); .8S6;xnkC
System.arraycopy(h.queue,1,data,0,data.length); NOLw119K
} 47ra`*
"jH=O(37
private static class MaxHeap{ "G-} wt+P
\/g.`Pe
void init(int[] data){ o_p#sdt"
this.queue=new int[data.length+1]; SH2|xn
for(int i=0;i queue[++size]=data; r t@Jw]az
fixUp(size); U8KB@E
} ATp7:Q
} l69&-Nyg
ml<X92Y
private int size=0; ,4zwd@&O
3`S|I_$(T"
private int[] queue; ?F1NZA[%t
oMawINDa
public int get() { 2F[smUL
return queue[1]; 1Y:lFGoe
} h%0/j
3JVENn9
public void remove() { T&c0j(
SortUtil.swap(queue,1,size--); /L\]t
fixDown(1); #;sUAR?]
} (lq7 ct
file://fixdown _fx0-S*$
private void fixDown(int k) { zZ&L#
int j; D1o<:jOj
while ((j = k << 1) <= size) { k #y4pF_
if (j < size %26amp;%26amp; queue[j] j++; YhYcqE8
if (queue[k]>queue[j]) file://不用交换 0OO$(R*
break; 3o&PVU?Q
SortUtil.swap(queue,j,k); j/`-x
k = j; e>vV8a\
} +e?mKLw14
} eR PmN
private void fixUp(int k) { p%toD{$
while (k > 1) { 8d|omqe~P
int j = k >> 1; *{8<4CVv
if (queue[j]>queue[k]) bCr) 3,
break; _xT=AF9~o
SortUtil.swap(queue,j,k); S*-n%D0q5
k = j; k~Qb"6n2
} 7\m.xWX e
} mX3~rK>@~
vp@%wxl!:
} @RGVcfCG)
Y?W"@awE"\
} PPSf8-MLW
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SortUtil： g^ZsV:D
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package org.rut.util.algorithm; 86igP
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import org.rut.util.algorithm.support.BubbleSort; }`#OA]NZ
import org.rut.util.algorithm.support.HeapSort; dR~4*59Bg
import org.rut.util.algorithm.support.ImprovedMergeSort; qplz !=
import org.rut.util.algorithm.support.ImprovedQuickSort; N=FU>qbz
import org.rut.util.algorithm.support.InsertSort; p?(w!O
import org.rut.util.algorithm.support.MergeSort; 4lhoA
import org.rut.util.algorithm.support.QuickSort; M\O6~UFq!
import org.rut.util.algorithm.support.SelectionSort; Tap=K|b ]
import org.rut.util.algorithm.support.ShellSort; SFCKD/8
to{/@^ D
/** eQ_dO]Q
* @author treeroot sf )ojq6s
* @since 2006-2-2 eAKK uML
* @version 1.0 R|aA6} /I
*/ n!=%MgF'*p
public class SortUtil { PhF.\Wb
public final static int INSERT = 1; i(P/=B
public final static int BUBBLE = 2; 1cPm $=B
public final static int SELECTION = 3; jY>|>]4X
public final static int SHELL = 4; ?&$??r^i
public final static int QUICK = 5; V?AHj<
public final static int IMPROVED_QUICK = 6; >^}nk04
public final static int MERGE = 7; !R*%F
public final static int IMPROVED_MERGE = 8; i(R&Q;{E^
public final static int HEAP = 9; q] g'rO'
vJ5`:4n"
public static void sort(int[] data) { +p6cG\Gp
sort(data, IMPROVED_QUICK); ;AyE(|U+
} W/_=S+CvK
private static String[] name={ lg` Qi&
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" >;V ?s]
}; #U45H.Rz
@V{s'V
private static Sort[] impl=new Sort[]{ %zj;~W;qPH
new InsertSort(), H.`>t
new BubbleSort(), ]-h$CJSY
new SelectionSort(), fFP>$
new ShellSort(), T \%{zz_(
new QuickSort(), s`"o-w\$>
new ImprovedQuickSort(), U:6 J~
new MergeSort(), [U+6Tj,
new ImprovedMergeSort(), fy|ycWW>8
new HeapSort() ^Q!qJav
}; 3`sM/BoA
F02S(WWo;
public static String toString(int algorithm){ b]S4\BBT
return name[algorithm-1]; ?^]29p_
} &atT7m
hnWo.5;$
public static void sort(int[] data, int algorithm) { Ar&]/X,WG
impl[algorithm-1].sort(data); mD}&X7
} 7^$PauAv
N<c98
public static interface Sort { ;#c|ZnX
public void sort(int[] data); oFt]q =EU
} |jB]5ciT
5Pmmt&#/Z
public static void swap(int[] data, int i, int j) { `L<f15][
int temp = data; v&g(6~b_>
data = data[j]; VsS.\1
data[j] = temp; :NB|r
} v%RcwVt|
} 9^l[d<