[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; cO"7wgg
} ;Qc_Tf=,
int i1=l; NQ@."8
int i2=mid+1; T)ra>r<#
for(int cur=l;cur<=r;cur++){ J34lu{'if
if(i1==mid+1) vH+QI
data[cur]=temp[i2++]; 6 ztM(2[
else if(i2>r) J!o[/`4ib
data[cur]=temp[i1++]; )MZQ\8,)]
else if(temp[i1] data[cur]=temp[i1++]; MNKB4C8>
else KS/1ux4x
data[cur]=temp[i2++]; wU#79:h
} Ncu\;K\N
} F$FCfP7
6XO%l0dC.
} (:>:tcE
||&EmH
改进后的归并排序: E,nC}f
7)NQK9~
package org.rut.util.algorithm.support; :*"0o{ ie
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import org.rut.util.algorithm.SortUtil; nJ`JF5tI
&zr..i4O
/** 8qfg=mu+%
* @author treeroot ZgL4$%
* @since 2006-2-2 t/K<fy 6
* @version 1.0 I"^ `!8<q
*/ j|&?BBa9
public class ImprovedMergeSort implements SortUtil.Sort { shwKB 5
H1'`* }V
private static final int THRESHOLD = 10; ~bCn%r2
$g55wGF
/* n;0bVVMV
* (non-Javadoc) a(Bo.T<2@
* Wm nsD!
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;Bo{.916
*/ `n]y"rj'
public void sort(int[] data) { tdn[]|=
int[] temp=new int[data.length]; *ws!8-)fH
mergeSort(data,temp,0,data.length-1); ;N4b~k)
} y8Bi5Ae,+1
8]Xwj].^C
private void mergeSort(int[] data, int[] temp, int l, int r) { G l=dL<F
int i, j, k; gd6We)&
int mid = (l + r) / 2; L\8tqy.
if (l == r) EAcJ>
return; iO;q]
if ((mid - l) >= THRESHOLD) QW.VAF\6*
mergeSort(data, temp, l, mid); k, )7v
else 7CzZHkTg
insertSort(data, l, mid - l + 1); h5G>FPM-=
if ((r - mid) > THRESHOLD) m-lUgx7
mergeSort(data, temp, mid + 1, r); '._8
else mfO:#]K
insertSort(data, mid + 1, r - mid); zm}4=Kz}
9N|O*h1;u
for (i = l; i <= mid; i++) { R ;^[4<&
temp = data; R/M:~h~F!
} ur-&- G^
for (j = 1; j <= r - mid; j++) { yf!
temp[r - j + 1] = data[j + mid]; <`sVu
} 2Av3.u8%u
int a = temp[l]; Ud0%O
int b = temp[r]; P.P3/,
for (i = l, j = r, k = l; k <= r; k++) { '}*5ee](S
if (a < b) { rp.S4;=Q9
data[k] = temp[i++]; |lIkmW{
a = temp; 4`G":nE?We
} else { 4w^B&e%
data[k] = temp[j--]; e@s+]a8D-k
b = temp[j]; 6I(y`pJ
} Zr_{Z@IpU
} pJx88LfR
} Re('7m h~
Xd>4n7nb$`
/** lNQt
* @param data n*%<!\gJ
* @param l 34 W#
* @param i 2i#wJ8vrF
*/ }`4o+
private void insertSort(int[] data, int start, int len) { o|Obl@CSBD
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); mCe,(/>l+
} v8,+|+3
} *KF:
} oYnA 3
} _/ZIDIn
nbMnqkNb
堆排序： VcT(n7
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package org.rut.util.algorithm.support; g.X?wyg5
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import org.rut.util.algorithm.SortUtil; y@'8vOh`
{IJV(%E
/** +/7UM x1
* @author treeroot Eu\&}n`i
* @since 2006-2-2 @#1k+tSA,
* @version 1.0 x`w 4LF
*/ %up]"L&i
public class HeapSort implements SortUtil.Sort{ cu]2`DF
3Ec5:Caz
/* (non-Javadoc) m,$oV?y>j
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Ck2O?Ne
*/ gpsEN(.w
public void sort(int[] data) { too=+'<N</
MaxHeap h=new MaxHeap(); RyC]4QyC
h.init(data); gQgG_&xkC
for(int i=0;i h.remove(); g4P059
System.arraycopy(h.queue,1,data,0,data.length); ~qLbyzHaB
} I)V2cOrXM
tS8*l2Y`
private static class MaxHeap{ =U!'v X d
CN\SxK`,
void init(int[] data){ "{&\nt
this.queue=new int[data.length+1]; fzRzkn:=
for(int i=0;i queue[++size]=data; tQbDP!,A*=
fixUp(size); ?C//UN;
} ||cG/I&,
} P*T'R
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private int size=0; 6DD^h:*>
2BBGJE
private int[] queue; <g5Btwo%
G6_Kid}"q
public int get() { K7Kd{9-2
return queue[1]; <)n1Z[4
} Axhe9!Fm
}XWic88!~
public void remove() { (EIdw\
SortUtil.swap(queue,1,size--); 9`i=kp
fixDown(1); s<H0ka@
} K& <|94_k
file://fixdown ]y@9z b
private void fixDown(int k) { L{ ?& .iA
int j; z9U<Z^4z+
while ((j = k << 1) <= size) { uO>$,s
if (j < size %26amp;%26amp; queue[j] j++; SJ^.#^)
if (queue[k]>queue[j]) file://不用交换 +|).dm
break; E:T<mI?d
SortUtil.swap(queue,j,k); {N[IjY
k = j; 9kuL1tcY
} XL>Vwd
} u^|XQWR$:
private void fixUp(int k) { @>B#2t&
while (k > 1) { cBBc^SR
int j = k >> 1; kB_GL>fc
if (queue[j]>queue[k]) (]^9>3{|
break; $)vljM<<
SortUtil.swap(queue,j,k); FF6[qSV
k = j; ,h5\vWZ
} o*eU0
} }H!c9Y
4K[E3aA
} a[]=*(AZI
<s2IC_f<+
} Bjq1za
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SortUtil： ?P,z^
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package org.rut.util.algorithm; (Ybc~M)z
3_~V(a
import org.rut.util.algorithm.support.BubbleSort; Ovv~ymj
import org.rut.util.algorithm.support.HeapSort; }|%dN*',
import org.rut.util.algorithm.support.ImprovedMergeSort; [94A?pn[z
import org.rut.util.algorithm.support.ImprovedQuickSort; >y"W(
import org.rut.util.algorithm.support.InsertSort; q|b#=Af]g
import org.rut.util.algorithm.support.MergeSort; '}e_8FS
import org.rut.util.algorithm.support.QuickSort; m"<0sqD;
import org.rut.util.algorithm.support.SelectionSort; h^D?G2O
import org.rut.util.algorithm.support.ShellSort; M9HM:
_,"T;i
/** O&V}T#8n
* @author treeroot O;9u1,%w
* @since 2006-2-2 Dz:A.x@$*
* @version 1.0 MzL^u8
*/ |)* K#%j
public class SortUtil { b4ZZyw
public final static int INSERT = 1; 8s-y+M@.
public final static int BUBBLE = 2; msM
public final static int SELECTION = 3; 7/a[;`i*!
public final static int SHELL = 4; S3EY9:^C
public final static int QUICK = 5; _?M34&.X
public final static int IMPROVED_QUICK = 6; CeSr~Ikg|
public final static int MERGE = 7; ynvU$}w ~'
public final static int IMPROVED_MERGE = 8; m.pB]yq&
public final static int HEAP = 9; jB!p,fqcb
%B}Q.'
public static void sort(int[] data) { B\r2M`N5
sort(data, IMPROVED_QUICK); J:Ea|tXK^
} {mrTpw
private static String[] name={ >8D!K0?E
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 7"@^JxYN
}; ^[,Q2MHCT(
g(B&A P_e
private static Sort[] impl=new Sort[]{ KV9'ew+M
new InsertSort(), ,7KP
new BubbleSort(), F&%@p&
new SelectionSort(), ztTj2M"
new ShellSort(), ]W~\%`#8?
new QuickSort(), :JH#*5%gQ:
new ImprovedQuickSort(), de1cl<
new MergeSort(), Ckd@|
new ImprovedMergeSort(), 7DDd1"jE
new HeapSort() ?;zu>4f|
}; a\>+!Vq
n/6#rj^$
public static String toString(int algorithm){ NY 756B*
return name[algorithm-1]; Atc9[<~WG
} <K;
C]414Ibi
public static void sort(int[] data, int algorithm) { %V71W3>6WS
impl[algorithm-1].sort(data); !TvNT}4Z
} H )hO/1m
L[lX?g?Ob
public static interface Sort { g"ha1<y<
public void sort(int[] data); r*HbglB
} #%N v\g;
p4GhT~)l:
public static void swap(int[] data, int i, int j) { Z^E>)!t
int temp = data; #V&98 F
data = data[j]; 3.@"GS#"[
data[j] = temp; m0QE S
} 6!zBLIYFI
} )12.W=p