[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; o/bmS57
} {%ZD^YSA
int i1=l; _6v|k}tW'Y
int i2=mid+1; JJ5s |&}
for(int cur=l;cur<=r;cur++){ !SAjV)
if(i1==mid+1) GU\}}j]
data[cur]=temp[i2++]; j'#M'W3@
else if(i2>r) FOxMt;|M
data[cur]=temp[i1++]; sHx>UvN6
else if(temp[i1] data[cur]=temp[i1++]; pJ7M.C!
else {#aW")x^#
data[cur]=temp[i2++]; > Q+Bw"W<
} ]42bd
} u/3 4E=
C~Fdo0D
} p}%T`e=Z9
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改进后的归并排序: M[N$N`9
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package org.rut.util.algorithm.support; ]p/f@j?LU
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import org.rut.util.algorithm.SortUtil; <\<[J0
C~IsYdln
/** -z9-f\
* @author treeroot 4hb<EH'_&
* @since 2006-2-2 X(nbfh?n
* @version 1.0 E Z95)pk
*/ j_\nsM7
public class ImprovedMergeSort implements SortUtil.Sort { v`ckvl)(C
b13XHR)0
private static final int THRESHOLD = 10; &L[7jA'[J
?YzOA${
/* rcUXYJCh-
* (non-Javadoc) 5(0f"zY
* (he cvJ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) zyyt`
*/ $Cw> z^}u
public void sort(int[] data) { !e?g"5r{Bv
int[] temp=new int[data.length]; t{n|!T&
mergeSort(data,temp,0,data.length-1); D7.|UG?G
} .}W#YN$
E_-3G<rt
private void mergeSort(int[] data, int[] temp, int l, int r) { >h+[#3vD
int i, j, k; K]4XD1n7
int mid = (l + r) / 2; V3j1M?>
if (l == r) ns|)VX
return; )&R^J;W$M1
if ((mid - l) >= THRESHOLD) CPssk,q~C
mergeSort(data, temp, l, mid); \~|+*^e)
else qP6YnJWl
insertSort(data, l, mid - l + 1); Uf#.b2]
if ((r - mid) > THRESHOLD) UV}\#86!
mergeSort(data, temp, mid + 1, r); UX3 ]cr
else {[~cQgCI
insertSort(data, mid + 1, r - mid); wg<UCmfu!
%$K2$dq5
for (i = l; i <= mid; i++) { "LyMw){
temp = data; #-b0U[,.
} g.![>?2$8
for (j = 1; j <= r - mid; j++) { <BoDLvW>
temp[r - j + 1] = data[j + mid]; Y)*5M
} W`HO Q
int a = temp[l]; oG5:]/F
int b = temp[r]; q3a`Y)aVB
for (i = l, j = r, k = l; k <= r; k++) { FV>j !>Y
if (a < b) { am>X7
data[k] = temp[i++]; : tKa1vL
a = temp; h/u>F$}c
} else { NjT#p8d X
data[k] = temp[j--]; 6E~T$^Q}
b = temp[j]; v0EF?$Wo
} >05_#{up
} ^MJTlRUb
} ATq)8Rm\
hs'J'~a
/** wfr+-
* @param data NHKIZx8sR
* @param l kkfwICBI
* @param i Q2[@yRY/z
*/ "Uy==~
private void insertSort(int[] data, int start, int len) { )aY^k|I
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); gG;d+s1
} `uRf*-
} '_)NI
} axT-
} L@> +iZSO
A#&Q(g\YE
堆排序： (ATvH_Z
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package org.rut.util.algorithm.support; Ta;'f7Oz
n^OWz4
import org.rut.util.algorithm.SortUtil; DoV<p?U
HD"Pz}k4
/** mQ#E{{:H+
* @author treeroot >y<yFO{
* @since 2006-2-2 K}^Jf;
* @version 1.0 X ?p_O2#k
*/ y>+xdD0+
public class HeapSort implements SortUtil.Sort{ _y~H#r9:
.eQIU$Kw!O
/* (non-Javadoc) V&)lS Qw
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +QS7F`O
*/ B-63IN
public void sort(int[] data) { }T!2IaAB
MaxHeap h=new MaxHeap(); AEx|<E0
h.init(data); UPtWj8h
for(int i=0;i h.remove(); xgl~4
System.arraycopy(h.queue,1,data,0,data.length); hR;J#w
} Mv9q-SIc[
]KX _a1e
private static class MaxHeap{ I{Pny/d`
/rRQ*m_
void init(int[] data){ b}P5*}$:9"
this.queue=new int[data.length+1]; -OLXRc=
for(int i=0;i queue[++size]=data; 5fGUJ[F=
fixUp(size); \VW&z:/*pZ
} 1iOQ8hD
} Mp;yvatO
j!c[$;
private int size=0; {4\hxyw
N_jCx*.G
private int[] queue; r Ntc{{3_
~i)O^CKq
public int get() { m#[tY>Q[b
return queue[1]; UloZo? e`
} ;bJ2miO"e
Ydv\a6
public void remove() { !6:q#B*
SortUtil.swap(queue,1,size--); F">>,Oc)U"
fixDown(1); <,S0C\la=
} !*8x>,/>
file://fixdown s }P-4Sg
private void fixDown(int k) { A=X2zm>9
int j; {V& 2k9*
while ((j = k << 1) <= size) { Up|\&2_
if (j < size %26amp;%26amp; queue[j] j++; ZB-+bY
if (queue[k]>queue[j]) file://不用交换 .F'fBT`$
break; D7Y5q*F
SortUtil.swap(queue,j,k); <&'Ye[k
k = j; QC:/xP
} R#Z1+&='
} Nkfu k
private void fixUp(int k) { 1k@k2rE
while (k > 1) { /f!_dJ^
int j = k >> 1; #k%3Ag
if (queue[j]>queue[k]) &dSw[C#f
break; {},rbQ -
SortUtil.swap(queue,j,k); HLMEB0zh^
k = j; c`UJI$Q/
} M4a-+T"
} ,j~R ^j
xNt
} M,[u}Rf^w
<@CBc:j0
} UV>^[/^O
#&\hgsw/T
SortUtil： tK&.0)*=
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package org.rut.util.algorithm; fTi,S)F'
Xq&x<td
import org.rut.util.algorithm.support.BubbleSort; zE VJ
import org.rut.util.algorithm.support.HeapSort; t`{^gt
import org.rut.util.algorithm.support.ImprovedMergeSort; sV7dgvVd
import org.rut.util.algorithm.support.ImprovedQuickSort; lj"L Q(^
import org.rut.util.algorithm.support.InsertSort; %g(h%V9f
import org.rut.util.algorithm.support.MergeSort; Y^gK^?K
import org.rut.util.algorithm.support.QuickSort; C]UBu-]#S
import org.rut.util.algorithm.support.SelectionSort; LX.1]T*m`
import org.rut.util.algorithm.support.ShellSort; t"1'B!4
hoASrj{s
/** _t:cDXj
* @author treeroot o"^}2^)_SR
* @since 2006-2-2 qQR>z
* @version 1.0 tkdhT8_
*/ qR<
public class SortUtil { }+`W[h&u
public final static int INSERT = 1; [~)i<V|qJ
public final static int BUBBLE = 2; =$5[uI2
public final static int SELECTION = 3; r @~T}<I
public final static int SHELL = 4; -"5x? \.{m
public final static int QUICK = 5; o}5:vi]
public final static int IMPROVED_QUICK = 6; Yfy6o6*:
public final static int MERGE = 7; $4kc i@.
public final static int IMPROVED_MERGE = 8; XKp%7;
public final static int HEAP = 9; 1Qf21oN{
k>{i_`*
public static void sort(int[] data) { uVqJl{e\
sort(data, IMPROVED_QUICK); ovCk:Vz
} bIizh8d?
private static String[] name={ > 3JU
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" *Kt7"J
}; 1G|Q~%cv
XzQ=8r>l
private static Sort[] impl=new Sort[]{ @.kv",[{[
new InsertSort(), Xj$J}A@
new BubbleSort(), |aN0|O2
new SelectionSort(), >c7/E
new ShellSort(), fRT:@lV
new QuickSort(), bi!4I<E>k
new ImprovedQuickSort(), SPsq][5eR
new MergeSort(), l3}n.ODA
new ImprovedMergeSort(), HH6b{f@^
new HeapSort() }eb%"ZH4|
}; w0~iGr}P
k`js~/Xv
public static String toString(int algorithm){ 1L'[DKb'
return name[algorithm-1]; ?w# >Cs(
} nx=#QLi
%R;cXs4r
public static void sort(int[] data, int algorithm) { ]T^m>v)X
impl[algorithm-1].sort(data); 2Z@<llsi
} aEdFZ
CV4V_G
public static interface Sort { U^Z[6u
public void sort(int[] data); 3HbHl?-UNU
} Xkl^!,
4PiNQ'*
public static void swap(int[] data, int i, int j) { D4'? V Iz
int temp = data; Bx&`$lW
data = data[j]; 0P/A
data[j] = temp; $?Aez/
} w0SzK-&
} 7OtQK`P"A