[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; 714nUA872
} MdboWE5i
int i1=l; -:p1gg&
int i2=mid+1; S^`9[$KH0
for(int cur=l;cur<=r;cur++){ &EJ,k'7$
if(i1==mid+1) GZ[h`FJg/
data[cur]=temp[i2++]; ^V,/4u
else if(i2>r) `lh?Z3W
data[cur]=temp[i1++]; ;Kb[UZ1
else if(temp[i1] data[cur]=temp[i1++]; L , Fso./y
else n~i4yn=
data[cur]=temp[i2++]; VP[!ji9P
} %c2i.E/G
} AS"|r
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} m]}"FMH$
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改进后的归并排序: ~{$'sp0
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package org.rut.util.algorithm.support; :+^llz
'wq:F?viF
import org.rut.util.algorithm.SortUtil; +~.Jw#HqS
ZoReyY2
/** ddhTri'f
* @author treeroot 3evfX[V#
* @since 2006-2-2 \gv x)S11
* @version 1.0 ?o'arxCxZn
*/ qc"/T16M]
public class ImprovedMergeSort implements SortUtil.Sort { yVv3S[J
OWfj<#}t+
private static final int THRESHOLD = 10; `;2`H, G'
Xn'>k[}<k
/* 19`0)pzZ*P
* (non-Javadoc) JN-8\L
* U*h)nc
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) \eN/fTPm
*/ 0DT2qM[,
public void sort(int[] data) { Px&Mi:4tG
int[] temp=new int[data.length]; boB{Y7gO4
mergeSort(data,temp,0,data.length-1); mU>*NP(L
} kakWXGeR
j=QjvWD
private void mergeSort(int[] data, int[] temp, int l, int r) { /`@>v$oo
int i, j, k; Fpwh.R:yV
int mid = (l + r) / 2; S$/3Kq
if (l == r) t^;Fq{>
return; SntYi0,`
if ((mid - l) >= THRESHOLD) tV4aUve
mergeSort(data, temp, l, mid); 5R G5uH/-<
else hrt-<7U
insertSort(data, l, mid - l + 1); u#|Jl|aT
if ((r - mid) > THRESHOLD) l(4./M
mergeSort(data, temp, mid + 1, r); ,Gx=e!-N5
else "g[UX{L
insertSort(data, mid + 1, r - mid); _I5+o\;1
xF+x I6
for (i = l; i <= mid; i++) { BEx^IQ2
temp = data; - & r{%7
} 9DE)5/c`v
for (j = 1; j <= r - mid; j++) { R;2 -/MT-
temp[r - j + 1] = data[j + mid]; 7Wn]l!
} r5wXuA,Um
int a = temp[l]; %z(=GcWm
int b = temp[r]; X/749"23
for (i = l, j = r, k = l; k <= r; k++) { 7s3<}
if (a < b) { Nuq/_x
data[k] = temp[i++]; XL9lB#v^
a = temp; a8$pc>2E
} else { 7J/3O[2
data[k] = temp[j--]; j'n= Xh
b = temp[j]; .?:~s8kB
} }1 ^.A84a
} ~;Kl/Z
} IW*.B6Hw8
.p_$]
/** ![jP)WgF
* @param data v0H#\p
* @param l -3Hq1
* @param i Mpx.n]O.
*/ xoaQ5u
private void insertSort(int[] data, int start, int len) { JwcP[w2
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); !1R
} <{uIB;P
} YdaJ&
} Vtri"G8 aB
} !I&Sy]G
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堆排序： z"`?<A&u
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package org.rut.util.algorithm.support; VvKH]>*
`#U6`[[
import org.rut.util.algorithm.SortUtil; +__Rk1CVh
f#mpd]e+6
/** -XB>&dNl)T
* @author treeroot zZQoY_UI
* @since 2006-2-2 KQ3 On(d
* @version 1.0 wS4wED&a
*/ \3/'#
public class HeapSort implements SortUtil.Sort{ .jw)e!<\N
=Y0m;-1M
/* (non-Javadoc) MvFXVCT#
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) RR|Eqm3)
*/ .EQFHStr
public void sort(int[] data) { Mt>DAk
MaxHeap h=new MaxHeap(); o}z}79Z
h.init(data); U>XGJQ<NS
for(int i=0;i h.remove(); $4pW#4/4
System.arraycopy(h.queue,1,data,0,data.length); 8Qh/=Ir
} C54)eT6
f[D#QC
private static class MaxHeap{ !$HWUxM;p
huIr*)r&p
void init(int[] data){ l?~h_8&fT
this.queue=new int[data.length+1]; ptcU_*Gd
for(int i=0;i queue[++size]=data; {[+gM?
fixUp(size); LtBH4A
} B^{DCHu/
} sYzG_*)
&V L<Rx
private int size=0; .Pi67Kj,
>Ko )Z&j9W
private int[] queue; rYJvI
I uDk9<[b:
public int get() { $oEDyC
return queue[1]; >KJ]\`2>)c
} gMbvHlT
Z[VKB3Pb8
public void remove() { g@L4G?hLn
SortUtil.swap(queue,1,size--); (Lp-3Xx
fixDown(1); ;DTNw=
} <Jx{Uv
file://fixdown "O`;zC
private void fixDown(int k) { ?W(f%/B#
int j; yLP0w^Q
while ((j = k << 1) <= size) { M<729M
if (j < size %26amp;%26amp; queue[j] j++; IP3-lru
if (queue[k]>queue[j]) file://不用交换 yY+2;`CH
break; 6-~
SortUtil.swap(queue,j,k); "?!IPX2\S
k = j; b8Qm4b?:4
} ~oI49Q&{
} /zWWUl`:
private void fixUp(int k) { +-"#GL~cC
while (k > 1) { v|xlI4
int j = k >> 1; VO9<:R
if (queue[j]>queue[k]) T7v8}_"-
break; !Zrvko
SortUtil.swap(queue,j,k); @fwU%S[v
k = j; ,F[mh
} VF-d^AGt
} h$!qb'|
vR,'':
} =%p"oj]:
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} mH?hzxa+
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SortUtil： ~ 0[K%]]
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package org.rut.util.algorithm; yDKX,
C"sa.#}
import org.rut.util.algorithm.support.BubbleSort; OV[-m;h|
import org.rut.util.algorithm.support.HeapSort; U+ 8[Ia(t
import org.rut.util.algorithm.support.ImprovedMergeSort; yP-Dj ,
import org.rut.util.algorithm.support.ImprovedQuickSort; oeIS&O.K
import org.rut.util.algorithm.support.InsertSort; B[$e;h*Aw[
import org.rut.util.algorithm.support.MergeSort; Mf *qr9*
import org.rut.util.algorithm.support.QuickSort; BK +JHT
import org.rut.util.algorithm.support.SelectionSort; P$Dr6;
import org.rut.util.algorithm.support.ShellSort; k4@GjO1"$
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/** vD(;VeW[
* @author treeroot ql8:s>1T
* @since 2006-2-2 r}991O<
* @version 1.0 5xiYCOy
*/ o 2DnkzpJ
public class SortUtil { 2|cIu 'U
public final static int INSERT = 1; QhZ%<zN
public final static int BUBBLE = 2; <D=%55
public final static int SELECTION = 3; ua{eri[
public final static int SHELL = 4; ka5>9E
public final static int QUICK = 5; 83dOSS2
public final static int IMPROVED_QUICK = 6; $&4Zw6"=
public final static int MERGE = 7; ILQg@Jl
public final static int IMPROVED_MERGE = 8; C/E3NL8
public final static int HEAP = 9; HqbTJ!a
$lv g.u
public static void sort(int[] data) { LC}]6
sort(data, IMPROVED_QUICK); <ZocMv9gM
} xW09k6
private static String[] name={ E>ev/6ox
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" u]}Xq{ZN
}; rUyT5Vf
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private static Sort[] impl=new Sort[]{ Uq&|iB#mF
new InsertSort(), ^^[,aBu
new BubbleSort(), +EFurdX\
new SelectionSort(), %jkd}D
new ShellSort(), 3w-0v"j U
new QuickSort(), c{E-4PYbah
new ImprovedQuickSort(), rF5<x3
new MergeSort(), EH[?*>+s
new ImprovedMergeSort(), c"|^Lo.
new HeapSort() vEb~QX0~
}; S-1}3T%
)S`A+M K]
public static String toString(int algorithm){ v\<`"
return name[algorithm-1]; :c6%;2
} fN&O `T>
?{FxbDp>
public static void sort(int[] data, int algorithm) { ;[|x5o/<
impl[algorithm-1].sort(data); gcz1*3)
} ;zGGT^Dn
{!,+C0
public static interface Sort { F'"-4YV>&
public void sort(int[] data); 3(CUC
} ^awl-CG
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public static void swap(int[] data, int i, int j) { 6=zme6D
int temp = data; IX3r$}4
data = data[j]; g'IS8@
data[j] = temp; *"E]^wCn
} is6JS^Q
} KJ-D|N,8@^