[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; ~ ;XYwQ"
} >Pyc[_j
int i1=l; @bY?$fj_u
int i2=mid+1; D8EeZUqU
for(int cur=l;cur<=r;cur++){ O*ImLR)i+s
if(i1==mid+1) bm^X!i5
data[cur]=temp[i2++]; CX.SYr&!R
else if(i2>r) SLg+H
data[cur]=temp[i1++]; Q-jf8A]
else if(temp[i1] data[cur]=temp[i1++]; \"J?@
else (`F|nG=X
data[cur]=temp[i2++]; uX98iJ
} EM=xd~H
} $wgc vySx
)]tvwEo
} +q l
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改进后的归并排序: [Ek42%
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package org.rut.util.algorithm.support; ;raz6DRO
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import org.rut.util.algorithm.SortUtil; 7|K3WuLL
}E,jR=@
/** Nr%(2[$ =
* @author treeroot 2Gm-\o&Td"
* @since 2006-2-2 fqN75['n
* @version 1.0 @+$cZ3,
*/ U @)k3^
public class ImprovedMergeSort implements SortUtil.Sort { u7n[f@Eg,%
uFC?_q?4\
private static final int THRESHOLD = 10; d&5c_6oW
>6IXuq
/* .hc|t-7f
* (non-Javadoc) ?Q;kZmQl
* f.J9) lfb
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) pFEZDf}:
*/ \WiqN*ZF
public void sort(int[] data) { ' *}^@[&
int[] temp=new int[data.length]; M5F(<,n;
mergeSort(data,temp,0,data.length-1); gA{'Q\
} }'DC Q
b~jIv:9T
private void mergeSort(int[] data, int[] temp, int l, int r) { L 43`^;u
int i, j, k; gm(De9u
int mid = (l + r) / 2; 'YBi5_
if (l == r) |PI)A`
return; =l_rAj~I|
if ((mid - l) >= THRESHOLD) Zd8drT'@#
mergeSort(data, temp, l, mid); -%>8.#~G
else ob)Q,;8R
insertSort(data, l, mid - l + 1); D DQs42[
if ((r - mid) > THRESHOLD) sw[oQ!f
mergeSort(data, temp, mid + 1, r); 9LH=3Qt
else hHCzj*5
insertSort(data, mid + 1, r - mid); <D~6v2$
8~.iuFp
for (i = l; i <= mid; i++) { ';&0~[R[
temp = data; Q! Kn|mnN
} kkT3wP
for (j = 1; j <= r - mid; j++) { kJI3`gS+
temp[r - j + 1] = data[j + mid]; "\4]X"3<+
} ~B<97x(X
int a = temp[l]; iD.0J/
int b = temp[r]; XO0>t{G
for (i = l, j = r, k = l; k <= r; k++) { z<n"{%
if (a < b) { CdDH1[J
data[k] = temp[i++]; ^eT@!N
a = temp; JOJh,8C)6
} else { 1$);V,DK!
data[k] = temp[j--]; c/b%T
b = temp[j]; ('T4Db
} u/_Gq[Q,u
} tB GkRd!
} ,c@r` x
cT_uJbP+
/** TP~( r
* @param data Hr /W6C
* @param l 1a5?)D
* @param i U&,r4>V@h>
*/ lr`?yn1D(
private void insertSort(int[] data, int start, int len) { r49UJE
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ?68$3;
} wDB)&b
} /z/hUa
} *Hxj_
} \nC5 ,Rz
uFGv%W
堆排序： ?UxG/]",
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package org.rut.util.algorithm.support; cC b>zI
;>inT7?3|
import org.rut.util.algorithm.SortUtil; w/qQ(]n8
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/** ARmu{cL
* @author treeroot BXT80a\
* @since 2006-2-2 n"XdHW0
* @version 1.0 Tq9,c#}&
*/ 8o!
public class HeapSort implements SortUtil.Sort{ W3FymCI
qRgK_/[]
/* (non-Javadoc) D_O5k|-V
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *d^9,GGn-
*/ WA<H
public void sort(int[] data) { mw:3q6
MaxHeap h=new MaxHeap(); D9}d]9]$
h.init(data); "B3iX@C
for(int i=0;i h.remove(); eA~J4k_
System.arraycopy(h.queue,1,data,0,data.length); K{, W_^
} ^fA3<|
JOA%Y;`<#
private static class MaxHeap{ :X3rd|;kc
H%*~l
void init(int[] data){ ^ze@#Cp
this.queue=new int[data.length+1]; j'G"ZPw1
for(int i=0;i queue[++size]=data; zd?bHcW/h
fixUp(size); $~ pr+Ei
} `Mo~EHso.
} r0~7v1rG
j09mI$2y67
private int size=0; 3{.9O$
zi?qK?m
private int[] queue; 38"8,k
O{;M6U8C\
public int get() { RA*_&Ll&!C
return queue[1]; M3hy5j(b
} ?whRlh
3c1o,2
public void remove() { 2z.k)Qx!Z
SortUtil.swap(queue,1,size--); ^AovkK(p
fixDown(1); 0lLr[
} Wwn5LlJ^
file://fixdown 0z#l0-NdQ
private void fixDown(int k) { k$9Gn9L%
int j; 5"76R Gw=
while ((j = k << 1) <= size) { ?3]h~(=
if (j < size %26amp;%26amp; queue[j] j++; I>N-95
if (queue[k]>queue[j]) file://不用交换 *D,v>(
break; [,\'V0
SortUtil.swap(queue,j,k); E&RoaY0
k = j; "U/NMGMj
} qg_>`Bv"a
} v&t`5-e-A
private void fixUp(int k) { OhA^UP01-
while (k > 1) { /ChJ~g"
int j = k >> 1; [+%p!T
if (queue[j]>queue[k]) 5*G8W\ $
break; H;7O\
SortUtil.swap(queue,j,k); :vn0|7W4
k = j; UQC'(>.}
} dg!1wD
} ')C_An>X6
J ,Qy`Y B
} /t%"Dh8x
/u" cl2|
} >#${.+y
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SortUtil： sqq/b9 uL/
&(z8GYBr
package org.rut.util.algorithm; x9XGCr
uAPLT~
import org.rut.util.algorithm.support.BubbleSort; j8D$/
import org.rut.util.algorithm.support.HeapSort; @F""wKnV
import org.rut.util.algorithm.support.ImprovedMergeSort; puf;"c6e'
import org.rut.util.algorithm.support.ImprovedQuickSort; 18[?dV
import org.rut.util.algorithm.support.InsertSort; Nlf&]^4(0
import org.rut.util.algorithm.support.MergeSort; ql%]$`IV6
import org.rut.util.algorithm.support.QuickSort; h=p-0 Mx .
import org.rut.util.algorithm.support.SelectionSort; o m{n"cg
import org.rut.util.algorithm.support.ShellSort; 0ER6cTo-t
7|{%CckN
/** ;-<<1Jz/2
* @author treeroot ;X9MA=b
* @since 2006-2-2 xX/Qoq (}i
* @version 1.0 n@yd{Rc
*/ 9M-NItFos
public class SortUtil { Y(Z(dV!Po
public final static int INSERT = 1; rRA_'t;uK
public final static int BUBBLE = 2; 2WbZ>^:Nsk
public final static int SELECTION = 3; d-A%ZAkE]
public final static int SHELL = 4; AW{/k'%xw
public final static int QUICK = 5; 1*x5/b
public final static int IMPROVED_QUICK = 6; @BB,i /
public final static int MERGE = 7; CwCo"%E8}
public final static int IMPROVED_MERGE = 8; l*m]2"n]
public final static int HEAP = 9; sKE*AGFLd
*y[~kWI
public static void sort(int[] data) { \8C*O{w
sort(data, IMPROVED_QUICK); ]0/~6f
} +Qb2LR
private static String[] name={ ]UpHD.Of[t
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 4n.i<K8K[
}; lHj7O&+
9X^-)G>
private static Sort[] impl=new Sort[]{ a3E*%G
new InsertSort(), epY;1,;>
new BubbleSort(), b`;b}ug
new SelectionSort(), iz,q8}/(
new ShellSort(), c_DB^M!h
new QuickSort(), K{[Fa,]'
new ImprovedQuickSort(), [{.\UkV@
new MergeSort(), SqT"/e]b'
new ImprovedMergeSort(), ,XF6Xsg2
new HeapSort() cbg3bi
}; lw/ m0}it
4*ty&s=5OJ
public static String toString(int algorithm){ c,u$tnE)
return name[algorithm-1]; {F{[!.
} @Ig,_i\UY:
&55uT;7] a
public static void sort(int[] data, int algorithm) { =f{Z~`3
impl[algorithm-1].sort(data); N;Gf,pE
} [/2@=Uh-
0,i+
public static interface Sort { =tvm=
public void sort(int[] data); ,y{fqa4
} iM-hWhU
[wpt[zG
public static void swap(int[] data, int i, int j) { Z!5m'yZO
int temp = data; enfu%"(K)
data = data[j]; N?u2,h-
data[j] = temp; 0ju wDd
} }M"'K2_Z
} 0"D?.E"$r