[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; :YZqrcr}
} MH"{N "|
int i1=l; Mw0Kg9M
int i2=mid+1; #E[{
for(int cur=l;cur<=r;cur++){ 6D[m}/?Uy
if(i1==mid+1) uafSz@`
data[cur]=temp[i2++]; X=:|v<E
else if(i2>r) xKilTh_.6
data[cur]=temp[i1++]; -,M*j|
else if(temp[i1] data[cur]=temp[i1++]; M^i^_}~S;
else ;1S~'B&1Q
data[cur]=temp[i2++]; 52*9q!
} EJdl%j
} #HMJBQ4v#
EFb1Y{u^\!
} GI&XL'K&
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改进后的归并排序: E>/kNl
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package org.rut.util.algorithm.support; 0i76(2
7J 0=HbH
import org.rut.util.algorithm.SortUtil; QKj-"y[
`zr%+
/** bNUb
* @author treeroot mkA1Sh{hX>
* @since 2006-2-2 ?w{lC,
* @version 1.0 aOS:rC
*/ + _=&7
public class ImprovedMergeSort implements SortUtil.Sort { a(+.rf;
?2Q9z-$
private static final int THRESHOLD = 10; EcBJ-j6d
_[yBwh
/* (+@ Lnz\
* (non-Javadoc) ^E)Kse.>
* &P+7Um(
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2"31k2H[
*/ y"|QY!fK
public void sort(int[] data) { z9@Tg=#i
int[] temp=new int[data.length]; $1QQidB
mergeSort(data,temp,0,data.length-1); {Vc%ga|E
} dQ4VpR9|;
:Hk:Goo2
private void mergeSort(int[] data, int[] temp, int l, int r) { .'zXO
int i, j, k; >s@*S9cj:
int mid = (l + r) / 2; pEc|h*p8
if (l == r) TM|M#hMS
return; ?tWcx;h:>
if ((mid - l) >= THRESHOLD) <A"T_Rk
mergeSort(data, temp, l, mid); 7Z-'@m
else ?o@5PL
insertSort(data, l, mid - l + 1); E*[dc
if ((r - mid) > THRESHOLD) 8PQn=k9
mergeSort(data, temp, mid + 1, r); jv:!vi:
else |N9::),<
insertSort(data, mid + 1, r - mid); )!h(oR
`rt
for (i = l; i <= mid; i++) { |5uvmK
temp = data; ;Z\1PwT
} jOJ$QT
for (j = 1; j <= r - mid; j++) { X!} t``
temp[r - j + 1] = data[j + mid]; d(.e%[`
} Y{6vW-z_<
int a = temp[l]; _l?InNv
int b = temp[r]; (!-gX"<b
for (i = l, j = r, k = l; k <= r; k++) { -E6#G[JJ
if (a < b) { (1~d/u?2\
data[k] = temp[i++]; 7 Jxhn!
a = temp; 8MHYk>O~{G
} else { H4s^&--
data[k] = temp[j--]; =0te.io)3O
b = temp[j]; K[tQ>C@s2
} gWt}q-@nRR
} hdL/zW7]
} {K\l3_=5qb
QEKRAPw
/** 3F5Y#[L`
* @param data RlRkw+%m
* @param l 8dg\_H_
* @param i !.(Kpcrg
*/ uSZCJ#'G
private void insertSort(int[] data, int start, int len) { axJuJ`+Y
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 6S#Y$2 P
} 8@Zg@>,
} +mM=`[Z`??
} =T73660
} ?F{sym@i
hlY]s &0
堆排序： Lu.D,oP
CqMm'6;$a}
package org.rut.util.algorithm.support; <Fkm7ME]
l^.d3b
import org.rut.util.algorithm.SortUtil; g@IV|C(*0
Dj Z;LE>
/** %+\ PN
* @author treeroot ==zt)s.G(+
* @since 2006-2-2 j]-0m4QF
* @version 1.0 3j'A.S
*/ ,EkzBVgo
public class HeapSort implements SortUtil.Sort{ W[pOLc-
S6k R o^2
/* (non-Javadoc) ]_Cm 5Z7
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Y7WxV>E
*/ b2}>{Li0
public void sort(int[] data) { W62 $ HI
MaxHeap h=new MaxHeap(); v"nN[_T
h.init(data); Bw;gl^:UG
for(int i=0;i h.remove(); r57&F`{
System.arraycopy(h.queue,1,data,0,data.length); 1&zvf4
} #BB,6E
^?pf.E!F`
private static class MaxHeap{ ;[-OMGr]#
YX A|1
void init(int[] data){ []i/\0C^
this.queue=new int[data.length+1]; 20 <$f
for(int i=0;i queue[++size]=data; G`n|fuv
fixUp(size); LAe>XF-5
} 9q +I
} @DiXe[kI
J1i{n7f=@
private int size=0; pbfIO47ZC
f`ro{p
private int[] queue; [I*)H7pt}
w %4SNR
public int get() { p>4tPI}bf
return queue[1]; gYeKeW3)
} ?q^o|Y/
K|i:tHF]@
public void remove() { ?]*WVjskE
SortUtil.swap(queue,1,size--); st- z>}
fixDown(1); hv)>HU&
} w}8 ,ICL
file://fixdown tcDWx:Q
private void fixDown(int k) { t0*kL.
int j; vY 0EffZ
while ((j = k << 1) <= size) { 0P{^aSxTP
if (j < size %26amp;%26amp; queue[j] j++; U2v;[>=]
if (queue[k]>queue[j]) file://不用交换 [HRry2#s
break; $|kq{@<
SortUtil.swap(queue,j,k); ^Rr!YnEN
k = j; ?cG~M|@
} 2C6o?*RjyY
} i-.]onR
private void fixUp(int k) { myq@X(K
while (k > 1) { s$%t*T2J>
int j = k >> 1; Ro}7ERA
if (queue[j]>queue[k]) cTC -cgp
break; +8<|P&fH
SortUtil.swap(queue,j,k); )b%t4~7
k = j; WqX$;'}h
} UL{+mp
} 0+-"9pED>E
M =/+q
} +3>)r{#k
QN4{xf:}S
} \d'>Ky;GD
x;^DlyyYU
SortUtil： _GhP{C$
|IcA8[
package org.rut.util.algorithm; 0oNNEC
L3/SIoqd
import org.rut.util.algorithm.support.BubbleSort; ^}w@&Bje
import org.rut.util.algorithm.support.HeapSort; _4#Mdnh}[
import org.rut.util.algorithm.support.ImprovedMergeSort; AvmI<U
import org.rut.util.algorithm.support.ImprovedQuickSort; 'hoEdJ]t5
import org.rut.util.algorithm.support.InsertSort; Abw=x4d(i
import org.rut.util.algorithm.support.MergeSort; V4#bW
import org.rut.util.algorithm.support.QuickSort; G '1K6
import org.rut.util.algorithm.support.SelectionSort; N8[ &1
import org.rut.util.algorithm.support.ShellSort; -dto46X
;JuBybJb
/** #QUQC2P(~
* @author treeroot #&k`-@b5|
* @since 2006-2-2 lU\v8!Ji
* @version 1.0 pZ`^0#Fo
*/ w@![rH6~F
public class SortUtil { n 3eLIA{
public final static int INSERT = 1; ~=P#7l\o1
public final static int BUBBLE = 2; <r>1W~bp.q
public final static int SELECTION = 3; \CU-a`n
public final static int SHELL = 4; C vOH*K'
public final static int QUICK = 5; >g>L>{
public final static int IMPROVED_QUICK = 6; T1-.+&<
public final static int MERGE = 7; \ u*R6z
public final static int IMPROVED_MERGE = 8; [ML|,kq!
public final static int HEAP = 9; kTW[)
3>T2k }
public static void sort(int[] data) { A"3"f8P8a
sort(data, IMPROVED_QUICK); gmqL,H#
} [PIh^DhK
private static String[] name={ 5cF7w
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" QmKEl|/{u
}; nk*T x
rq#\x{l
private static Sort[] impl=new Sort[]{ h@2YQgw`
new InsertSort(), ,qK'!
new BubbleSort(), On~w`
new SelectionSort(), ip+?k<]z
new ShellSort(), e"d-$$'e
new QuickSort(), NiSybyR$
new ImprovedQuickSort(), _x`oab0@
new MergeSort(), 8{- *Q(=/
new ImprovedMergeSort(), d)WGI RUx
new HeapSort() WvoJ^{\4N*
}; : GdLr
q/h, jM
public static String toString(int algorithm){ s~NJy'Y
return name[algorithm-1]; HhZ>/5'(
} FyhLMW3
O<`N0
public static void sort(int[] data, int algorithm) { }~#Tsv
impl[algorithm-1].sort(data); o)L)|
} uPVO!`N3
0{'m":D9
public static interface Sort { z.T>=C
public void sort(int[] data); 0sP*ChY5S
} N|2PW ~,
&5y|Q?
public static void swap(int[] data, int i, int j) { rYCIU
int temp = data; `'E(L&
data = data[j]; fzJ^`
data[j] = temp; 0: Nw8J
} @@z5v bs'{
} >c@jl