[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; IArpCF/"8
} (>)+;$Dr,\
int i1=l; %>x0*T$$
int i2=mid+1; .q|xMS}4
for(int cur=l;cur<=r;cur++){ !T&u2=`D
if(i1==mid+1) b{yH4)O
data[cur]=temp[i2++]; V.E.~<7D\
else if(i2>r) Q xj|lr
data[cur]=temp[i1++]; 6i?kkULBS
else if(temp[i1] data[cur]=temp[i1++]; 52q!zx E
else B4M'Er{v
data[cur]=temp[i2++]; Bt`r6v;\
} /M{)k_V
} 7\Yq]:;O
&`\kb2uep
} l#J>It\
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改进后的归并排序: S4uR\|
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package org.rut.util.algorithm.support; sov62wuqU
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import org.rut.util.algorithm.SortUtil; ,_4KyLfBF
g'l7Jr3
/** Q%b46"
* @author treeroot vp9E}ga
* @since 2006-2-2 C9^elcdv
* @version 1.0 `zvT5=*-#
*/ u.xA}yVS
public class ImprovedMergeSort implements SortUtil.Sort { U%SNROj
=fu_ Jau}
private static final int THRESHOLD = 10; 0^-b}
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/* Ug[F3J|Mu
* (non-Javadoc) *^&iw$Qx3
* 36D,el In
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) r:S5x.P2
*/ k+>p!1
public void sort(int[] data) { r0XGGLFuZl
int[] temp=new int[data.length]; >=RHE@
mergeSort(data,temp,0,data.length-1); ~A{[=v
} *TMM:w|1
lf7H8k,-
private void mergeSort(int[] data, int[] temp, int l, int r) { [+[fD
int i, j, k; 7C6BZ$(
int mid = (l + r) / 2; ^dp[Z,[1z
if (l == r) Ni;{\"Gt
return; nqw*oLFQ
if ((mid - l) >= THRESHOLD) Zq6ebj
mergeSort(data, temp, l, mid); i~M.F=I5
else {UjIxV(J
insertSort(data, l, mid - l + 1); rH9|JEz
if ((r - mid) > THRESHOLD) Q!$kUcky9
mergeSort(data, temp, mid + 1, r); 39^uLob
else ;kcFQed\w
insertSort(data, mid + 1, r - mid); i=+<7]Q
P24
for (i = l; i <= mid; i++) { [+5SEr}
temp = data; l'X?S(fiV
} :r[-7 [/
for (j = 1; j <= r - mid; j++) { '"NdT7*+
temp[r - j + 1] = data[j + mid]; eXtF[0f
} ~s^6Q#Z9|
int a = temp[l]; fTnyCaB
int b = temp[r]; 1</t #r
for (i = l, j = r, k = l; k <= r; k++) { Zi'8~iEH
if (a < b) { P<w>1 =
data[k] = temp[i++]; E9NGdp&-Ah
a = temp; mm~o%1|WR
} else { t3kh]2t
data[k] = temp[j--]; |x~ei_x7.p
b = temp[j]; G;.u>92r|
} ~8qFM
} 7.=s1~p
} a~+WL
zK]%qv]
/** +vY`?k`
* @param data jYssz4)tp
* @param l F_ lj>;}a5
* @param i U8@*I>vA
*/ RyIaT
private void insertSort(int[] data, int start, int len) { ;Z0cD*Jb
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); j-\^ }K.&
} +=F);;!
} +/ d8d
} E~U|v'GCd
} ZtZV:re=
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堆排序： A&|(%
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package org.rut.util.algorithm.support; i_9/!D
[aVJYr2
import org.rut.util.algorithm.SortUtil; [75e\=wK
XsCbJ[Z_?q
/** eh# (}v
* @author treeroot -cC(d$y
* @since 2006-2-2 Q? |MBTo
* @version 1.0 k{&E}:A
*/ =cX"gI[
public class HeapSort implements SortUtil.Sort{ X|0`$f
{.[,ee-)9
/* (non-Javadoc) v}t:}M<;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "h|0]y^2
*/ E.*OA y
public void sort(int[] data) { GeR-k9
MaxHeap h=new MaxHeap(); 04LVa|Y@U
h.init(data); :'Kx?Es
for(int i=0;i h.remove(); mr\L q~*c
System.arraycopy(h.queue,1,data,0,data.length); m,"tdVo.
} G@6,O-Sj
Jywz27j
private static class MaxHeap{ \^Q)`Lqp:g
&^<T/PiR
void init(int[] data){ !c' ;L'
this.queue=new int[data.length+1]; }tgn1xpx
for(int i=0;i queue[++size]=data; `RLrT34
fixUp(size); B$eF@v"
} Al;oI3
} G~j<I/)"
omU)hFvyS
private int size=0; 6>^k9cJp
m.X+sP-e
private int[] queue; jtJ8r5j 1
`Y$5g~3.
public int get() { $6+P&"8
return queue[1]; = nN*9HRD
} |xC TX
vWga>IGM
public void remove() { gDBQ\vM8
SortUtil.swap(queue,1,size--); t|,Ex7
fixDown(1); e;Z`&
} +opN\`
file://fixdown 9`VF [* 9
private void fixDown(int k) { VZ!$'??
int j; u$^`hzfI
while ((j = k << 1) <= size) { u 9TlXn
if (j < size %26amp;%26amp; queue[j] j++; *g}&&$b0
if (queue[k]>queue[j]) file://不用交换 XsMphZnK
break; Lu5.$b
SortUtil.swap(queue,j,k); )xs,
k = j; j ZafwBi
} 7l EwQ
} YA8~O5
private void fixUp(int k) { YCdxU1V
while (k > 1) { Z*B(L@H
int j = k >> 1; (KU@hp-\
if (queue[j]>queue[k]) 0u9h2/ma
break; BGjTa.&
SortUtil.swap(queue,j,k); |ZzBCL8q
k = j; nAj2k
} +Enff0 =+
} Bbp9Q,4
bS"M*
} {NDe9V5
h0pr"]sO;$
} S?tLIi/
Ku'U^=bVm:
SortUtil： SHh(ujz,
X"GQ^]$O
package org.rut.util.algorithm; Hvk?(\x
QyQ8M1m
import org.rut.util.algorithm.support.BubbleSort; <us{4%
import org.rut.util.algorithm.support.HeapSort; p+?WhxG)
import org.rut.util.algorithm.support.ImprovedMergeSort; xo+z[OIlF
import org.rut.util.algorithm.support.ImprovedQuickSort; 1MSu]) W
import org.rut.util.algorithm.support.InsertSort; &d;$k
import org.rut.util.algorithm.support.MergeSort; y?hW#l~#X
import org.rut.util.algorithm.support.QuickSort; {HDlv[O%
import org.rut.util.algorithm.support.SelectionSort; z#/*LP#oY
import org.rut.util.algorithm.support.ShellSort; c^k. <EA
-qF|Y f
/** K>eG5tt
* @author treeroot 1=.?KAXR
* @since 2006-2-2 b>EUa> h
* @version 1.0 /ep~/#Ia
*/ ?8/h3xV;
public class SortUtil { _\[G7
public final static int INSERT = 1; ,oil}N(
public final static int BUBBLE = 2; /L^dHI]Q
public final static int SELECTION = 3; }5Uf`pM8
public final static int SHELL = 4; 8m0sEV>
public final static int QUICK = 5; >S]')O$c
public final static int IMPROVED_QUICK = 6; ;{20Heuz
public final static int MERGE = 7; tTt~W5lo
public final static int IMPROVED_MERGE = 8; TQH#sx
public final static int HEAP = 9; :Yqa[._AF
_Ohq'ZgXm
public static void sort(int[] data) { r1]e:
sort(data, IMPROVED_QUICK); @xEQ<g
} J>35q'nN]F
private static String[] name={ T(DE^E@a
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" hrF4 a$
}; t"fD"Xpj
1doqznO
private static Sort[] impl=new Sort[]{ K(2s%
new InsertSort(), QeoDq
new BubbleSort(), f'S"F
new SelectionSort(), N5DS-gv
new ShellSort(), b.&YUg[#
new QuickSort(), {'(8<n57
new ImprovedQuickSort(), 8),Y|4
new MergeSort(), TH &B9
new ImprovedMergeSort(), g~b'}^J
new HeapSort() tHeLq*))
}; >wwEa4
5JXLfYTUI
public static String toString(int algorithm){ (WvA9s{/
return name[algorithm-1]; aT#|mk=\
} 0M?}S~p]
><~hOK?v
public static void sort(int[] data, int algorithm) { ;U&VPIX$
impl[algorithm-1].sort(data); )3
} @T"385>
AP%h!b5v
public static interface Sort { %<t/xAge
public void sort(int[] data); ?%(*bRV -
} =_Rd0,
e<K=Q$U.
public static void swap(int[] data, int i, int j) { _NFJm(X.
int temp = data; Pif1sL6'
data = data[j]; +8M{y D9#
data[j] = temp; ~4 ab\hq
} :|Cf$2k7
} 9tO_hhEQ@