[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; JE#H&]
} ^F-2tc
int i1=l; '@zMZc!
int i2=mid+1; <tm=
for(int cur=l;cur<=r;cur++){ +jS<n13T
if(i1==mid+1) '+GY6Ecg
data[cur]=temp[i2++]; O_ vH w^
else if(i2>r) WqS$C;]%
data[cur]=temp[i1++]; rCb$^(w{7
else if(temp[i1] data[cur]=temp[i1++]; (!?%"e
else 3HNm`b8G4m
data[cur]=temp[i2++]; 4sfq,shRq
} Pb1.X9*8c
} EztuVe
k2.\1}\
} *^XMf
e.Jaq^Gw|
改进后的归并排序: 1/syzHjbY
wa!z:}]
package org.rut.util.algorithm.support; 9Z"WV5o
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import org.rut.util.algorithm.SortUtil; ,zdK%V}
@:@5BCs<
/** CYsLyk
* @author treeroot %s;5
* @since 2006-2-2 s2F[v:|Wq
* @version 1.0 /XNC^!z6Js
*/ -S&d5(R
public class ImprovedMergeSort implements SortUtil.Sort { Zqv
yTNHM_P
private static final int THRESHOLD = 10; IsVR4t]
N7GZ'-t^Er
/* HdTB[(
* (non-Javadoc) b8[ ayy
* sxdDI?W4
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ma/<#l^}
*/ r=xec@R]*
public void sort(int[] data) { ys:F
int[] temp=new int[data.length]; )`2ncb
mergeSort(data,temp,0,data.length-1); - ^Y\'y2
} :G=ol2Q
JdUI:(
private void mergeSort(int[] data, int[] temp, int l, int r) { [.$/o}
int i, j, k; p9!jM\(
int mid = (l + r) / 2; ')iyD5/4
if (l == r) ?;Da%VS3
return; @RCZ![XYWg
if ((mid - l) >= THRESHOLD) 1\AcceJ|(w
mergeSort(data, temp, l, mid); _`Y%Y6O1/
else 1c*:" k
insertSort(data, l, mid - l + 1); twt's,dO
if ((r - mid) > THRESHOLD) H`yUSB IP
mergeSort(data, temp, mid + 1, r); T hVq5
else uTdz$Nh
insertSort(data, mid + 1, r - mid); |O'gT8
+:/.\3v71
for (i = l; i <= mid; i++) { P%d3fFzK
temp = data; WDr=+=Zj
} {cjp8W8hS
for (j = 1; j <= r - mid; j++) { ?B`c<H"
temp[r - j + 1] = data[j + mid]; .3wx}!:*|
} Ci[Ja#p7$h
int a = temp[l]; )EcfEym.>
int b = temp[r]; -I z,vd
for (i = l, j = r, k = l; k <= r; k++) { TxKNDu
if (a < b) { *ozXilO
data[k] = temp[i++]; }h|HT
a = temp; .eCUvX`$
} else { 9niffq)h
data[k] = temp[j--]; tiRi_
b = temp[j]; J/rF4=j%xy
} &KV$x3
} B-|C%~fe
} DD6K[\
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/** V<U9Pj^?^
* @param data q AsTiT6r
* @param l n<eK\w
* @param i 6I|9@~!y[
*/ cet|k!
private void insertSort(int[] data, int start, int len) { d_&~^*>
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Gsy90
} $dKo}
} gEmsPk,
} 4KW_#d`t
} >keYx<1
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堆排序： +JB*1dz>8
Wi*HLP!lNC
package org.rut.util.algorithm.support; !nQoz^_`P
bkm:#K
import org.rut.util.algorithm.SortUtil; 51;Bc[)%
D}2$n?~+
/** <AHdz/N
* @author treeroot v5FfxDvw
* @since 2006-2-2 mAe)Hy %
* @version 1.0 1R]h>'
*/ q1A0-W#4
public class HeapSort implements SortUtil.Sort{ "rrE_
iE]^6i
/* (non-Javadoc) @y|JIBBRc
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) \Awqr:A&
*/ "msPH<D
public void sort(int[] data) { w-Q=oEt
MaxHeap h=new MaxHeap(); R78P](1\>
h.init(data); !OOOc
for(int i=0;i h.remove(); /~g.j1g
System.arraycopy(h.queue,1,data,0,data.length); d:hX3
} +('=RyoT
J|8 u
private static class MaxHeap{ g{hbq[>X]
"&\]1A}Z-x
void init(int[] data){ xoQqku"vn
this.queue=new int[data.length+1]; = d!YM6G
for(int i=0;i queue[++size]=data; C`aUitL}
fixUp(size); OjK+`D_C
} Tq%##
} ~-A"M_n ?
=05jjR1
private int size=0; Qqp=
:x!'Eer n
private int[] queue; )r XUJ29.
<fDbz1Q;l
public int get() { 3\|PwA9fN8
return queue[1]; f/Q/[2t
} uTmT'u:}
\obM}caT
public void remove() { 4@@gC&:Y
SortUtil.swap(queue,1,size--); FCChB7c`
fixDown(1); P_Exh]P
} F&OcI.OTXF
file://fixdown 6h&i<->
private void fixDown(int k) { ~tB9kLFG
int j; 9n3.Ar
while ((j = k << 1) <= size) { djDE0-QxcR
if (j < size %26amp;%26amp; queue[j] j++; g7K<"Z {M
if (queue[k]>queue[j]) file://不用交换 Jx8DVjy
break; Z}>+!Z
SortUtil.swap(queue,j,k); ?1H>k<Jp
k = j; VWMr\]g
} s)9sbJ
} T>v`UN Bl]
private void fixUp(int k) { }vW3<|z
while (k > 1) { (y2P."
int j = k >> 1; ::Pf\Lb>
if (queue[j]>queue[k]) sP%J`L@h
break; Rm@F9D[,
SortUtil.swap(queue,j,k); @SAJ*hfb0
k = j; FNXVd/{M3
} pF:C
} (9+N_dLx~P
J 77*Ue^
} Bh6lK}9
v3]~*\!5
} buxyZV@1
3\5I4#S
SortUtil： }ct*<zj[~u
XKbTjR
package org.rut.util.algorithm; S@C"tHD
<##aD3)
import org.rut.util.algorithm.support.BubbleSort; P~@I`r567
import org.rut.util.algorithm.support.HeapSort; 'WoB\y569
import org.rut.util.algorithm.support.ImprovedMergeSort; P1"g62R
import org.rut.util.algorithm.support.ImprovedQuickSort; 9~}8?kPNw=
import org.rut.util.algorithm.support.InsertSort; /O$)m[
import org.rut.util.algorithm.support.MergeSort; 6`)Ss5jzk
import org.rut.util.algorithm.support.QuickSort; u6P U(f
import org.rut.util.algorithm.support.SelectionSort; #s-li b
import org.rut.util.algorithm.support.ShellSort; ''CowI
QtfLJ5vi
/** PML84*K -
* @author treeroot -V}ZbXJD
* @since 2006-2-2 &fifOF#[e
* @version 1.0 6X$iTJ[\x
*/ E>qehs,g
public class SortUtil { *9}~?#b
public final static int INSERT = 1; ~;nW+S$o
public final static int BUBBLE = 2; H=5#cPI#(^
public final static int SELECTION = 3; A|P `\_
public final static int SHELL = 4; s_`y"'^
public final static int QUICK = 5; q^b_'We_9
public final static int IMPROVED_QUICK = 6; Tq5F'@e
public final static int MERGE = 7; A*3R@G*h
public final static int IMPROVED_MERGE = 8; "C [uz&
public final static int HEAP = 9; >Y&o2zJy
x:IY6 l
public static void sort(int[] data) { D{s4Bo-
sort(data, IMPROVED_QUICK); XBHv V05mv
} SlUt&+)
private static String[] name={ ^ px)W,O
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" DZ0\pp?S
}; Hxd^oE
, MU9p*
private static Sort[] impl=new Sort[]{ .t9zF-jk
new InsertSort(), &8 4Izs/[
new BubbleSort(), gc{5/U9H*
new SelectionSort(), >.#tNFAs
new ShellSort(), q"pnFK9/L
new QuickSort(), JZrUl^8E
new ImprovedQuickSort(), 5V/CYcO
new MergeSort(), &0S/]E`_M
new ImprovedMergeSort(), RlTVx:
new HeapSort() Q Ph6 p3bg
}; d@t3C8
$Uxg$pqO
public static String toString(int algorithm){ T89VSB~
return name[algorithm-1]; -2Azpeh
} MOW {g\{\
{:9P4<%H
public static void sort(int[] data, int algorithm) { XG}pp`{o
impl[algorithm-1].sort(data); q! U'DDEP
} kXbdR
-d6*M*{|
public static interface Sort { r#[YBaCZJ
public void sort(int[] data); 15FGlO<<
} E={W^k!Vz:
:WBl0`kW]4
public static void swap(int[] data, int i, int j) { /1q] D8
int temp = data; #FV(a~
data = data[j]; tY=n("=2
data[j] = temp; SbW6O_
} L&nGjC+Lr
} VCvqiHn