[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; Jj=;
} WA$>pG5s
int i1=l; `Rdm-[&
int i2=mid+1; CAU0)=M
for(int cur=l;cur<=r;cur++){ 0vGyI>
if(i1==mid+1) ;oxAe<VIj
data[cur]=temp[i2++]; ^Q{Bq
else if(i2>r) H3H_u4_?SE
data[cur]=temp[i1++]; /R LI,.%
else if(temp[i1] data[cur]=temp[i1++]; NJ MJ
else e8EfQ1 Ar
data[cur]=temp[i2++]; gUAxyV
} v`c$!L5
} v6GsoQmA
jhGlG-^
} S\wW)Pv8
;c-3g]
改进后的归并排序: 1 Vy,&[c~"
&5%dhc4&!&
package org.rut.util.algorithm.support; y#<MVH
H2r8,|XL
import org.rut.util.algorithm.SortUtil; @-)tM.8~
T'#!~GpB
/** T%F0B`
* @author treeroot $ C0TD7=
* @since 2006-2-2 5y} v{Ijt
* @version 1.0 !$g+F(:(c
*/ 0fs$#j
public class ImprovedMergeSort implements SortUtil.Sort { >qo~d?+
7yt=]1
private static final int THRESHOLD = 10; m7%C#+67
` r']^ ,
/* #g5^SR|qE
* (non-Javadoc) aVe/ gE
* GOSI3RRn
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) _0pO8o-x
*/ q+a.G2S
public void sort(int[] data) { Qpt&3_
int[] temp=new int[data.length]; zTD@
mergeSort(data,temp,0,data.length-1); <8#ObdY!
} r,N[)@
l+y}4k=/
private void mergeSort(int[] data, int[] temp, int l, int r) { ~/IexQB&
int i, j, k; L fl-!1
int mid = (l + r) / 2; ?`zgq>R}w[
if (l == r) 1j\aH&)GH
return; _ jAo:K_Z
if ((mid - l) >= THRESHOLD) =C f(B<u
mergeSort(data, temp, l, mid); Dz_eB"}
else DP7C?}(
insertSort(data, l, mid - l + 1); 3P <'F2o
if ((r - mid) > THRESHOLD) |c2v%'J2G
mergeSort(data, temp, mid + 1, r); 8@M'[jT
else N8!TZ~1$
insertSort(data, mid + 1, r - mid); S^f:`9ab9
df=zF.5
for (i = l; i <= mid; i++) { @("}]/O V:
temp = data; !]S=z^"<
} -qebQv
for (j = 1; j <= r - mid; j++) { l SkEuN
temp[r - j + 1] = data[j + mid]; 3^.8.q(6
} \NXQ
int a = temp[l]; *C,N'M<u
int b = temp[r]; Z0fJ9HW
for (i = l, j = r, k = l; k <= r; k++) { L|^o71t|
if (a < b) { DI&MC9j(
data[k] = temp[i++]; YCw('i(|
a = temp; sg'NBAo"
} else { 6U,fz#<,}
data[k] = temp[j--]; .h;Se
b = temp[j]; >&H~nGP.
} t#<KxwhcN
} hN(L@0)
} Z,WW]Y,$
{@r*+~C3
/** :w?7j_p#
* @param data WwW^[k (X
* @param l ~4)Y#IxL
* @param i X^< >6|)
*/ GJ}.\EaAJ
private void insertSort(int[] data, int start, int len) { w}M3x^9@
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); .yVnw^gu
} $`vkw(;t)1
} b4 hIeBI\
} 9.0WKcwg
} =p&sl;PsLw
4w{-'M.B
堆排序： Yb=6C3l@
wk02[
package org.rut.util.algorithm.support; E'%lxr
* Zd_ HJi
import org.rut.util.algorithm.SortUtil; _2jw,WKr
KtTza5aF
/** HR3_@^<7
* @author treeroot v3JPE])/
* @since 2006-2-2 jNy?[ )
* @version 1.0 d.pp3D9/
*/ Q @2(aR
public class HeapSort implements SortUtil.Sort{ :HW>9nD.
WF/l7u#4i
/* (non-Javadoc) kUHie
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) C(,=[Fi-
*/ jX|=n.#q
public void sort(int[] data) { Q#WE|,a
MaxHeap h=new MaxHeap(); KtMbze
h.init(data); 6.Bh3p
for(int i=0;i h.remove(); @8"18HEp#
System.arraycopy(h.queue,1,data,0,data.length); a{`"68
} s#lto0b"8
F14(;'Az
private static class MaxHeap{ )!C7bTv 4
<*YO~S(R
void init(int[] data){ O|UxFnB}
this.queue=new int[data.length+1]; 8U^D(jrz
for(int i=0;i queue[++size]=data; IT1PPm
fixUp(size); nC~fvyd<P
} :l~EE!
} ~|R[O^9B
uu>lDvR*
private int size=0; (/fT]6(
)C}KR`"
private int[] queue; lcig7%
e}Q>\t45
public int get() { vOgLEN&]
return queue[1]; j@C0af
} dYyW]nZ&
~Oh=
public void remove() { g+9v$[!
SortUtil.swap(queue,1,size--); !BRcq~-.
fixDown(1); @*_ZoO7{
} $WNG07]tU
file://fixdown m;h<"]<
private void fixDown(int k) { 6{7 3p@
int j; ycjJbL(.
while ((j = k << 1) <= size) { B+Q+0tw*i
if (j < size %26amp;%26amp; queue[j] j++; =xBT>h;
if (queue[k]>queue[j]) file://不用交换 J"bD\%
break; ja75c~RUw
SortUtil.swap(queue,j,k); 8&T,LNZoY
k = j; kr{)
} M;qb7Mu
} x(vai1CrdH
private void fixUp(int k) { tE:X,Lt[
while (k > 1) { vpafru4
int j = k >> 1; WFj*nS^~l
if (queue[j]>queue[k]) DoG%T(M!a9
break; .M+v?Ad
SortUtil.swap(queue,j,k); &Y=.D:z<
k = j; 3`rIV*&_{
} eKJ:?Lxv;
} M,JA;a, _
&gWiu9WbS
} <N5rv3 s
hBoP=X.~
} 1$OVe4H1
jIZ+d;1
SortUtil： bx7\QU+
K>LpN')d
package org.rut.util.algorithm; gr\@sx?b
<p)Z/
import org.rut.util.algorithm.support.BubbleSort; |1i]L@&
import org.rut.util.algorithm.support.HeapSort; |>@-grs
import org.rut.util.algorithm.support.ImprovedMergeSort; mo*'"/
import org.rut.util.algorithm.support.ImprovedQuickSort; `+^sW#ki
import org.rut.util.algorithm.support.InsertSort; 4 iKR{P6
import org.rut.util.algorithm.support.MergeSort; Me<du& T
import org.rut.util.algorithm.support.QuickSort; 1XGG.+D
import org.rut.util.algorithm.support.SelectionSort; enPLaiJ'|q
import org.rut.util.algorithm.support.ShellSort; 94+/wzWvi
W'V@
/** >"bnpYSe
* @author treeroot -+' #*V
* @since 2006-2-2 `1$y(w]
* @version 1.0 k%^<}s@
*/ ~z>BfL
public class SortUtil { Wk,6) jS=}
public final static int INSERT = 1; i[8NO$tN1)
public final static int BUBBLE = 2; b^%?S8]h
public final static int SELECTION = 3; &8waih(|
public final static int SHELL = 4; $mD>rx
public final static int QUICK = 5; ret0z|
public final static int IMPROVED_QUICK = 6; bz$Qk;m=H
public final static int MERGE = 7; L=,Y1nO:p
public final static int IMPROVED_MERGE = 8; ;n` $+g:>
public final static int HEAP = 9; D-~G|8g
-$OD}5ku#
public static void sort(int[] data) { N-D(y
sort(data, IMPROVED_QUICK); #TIX_RXh
} n+X1AOE[L
private static String[] name={ :4{Qh
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" v8>!Gft
}; o|0 '0P
VkWO}
private static Sort[] impl=new Sort[]{ ]u;GNz}?
new InsertSort(), e/ WBgiLw
new BubbleSort(), U|9U(il
new SelectionSort(), [4ee <J
new ShellSort(), T^N L:78
new QuickSort(), t18UDR{
new ImprovedQuickSort(), ^t`f1rGR
new MergeSort(), )&XnM69~b
new ImprovedMergeSort(), q%DVDq( z
new HeapSort() Q5hb0O%a
}; 0n\^$WY
w[e0wh`.
public static String toString(int algorithm){ >/8ru*Oc
return name[algorithm-1]; ;v%Q8
} g>UBZA4
tK*%8I\s
public static void sort(int[] data, int algorithm) { C?{D"f`[]
impl[algorithm-1].sort(data); {ip=iiW2
} #>@<n3rq
<Kh?Ad>N
public static interface Sort { ?_8%h`z
public void sort(int[] data); T.J`S(oI
} pn|p(6
y#&$f
public static void swap(int[] data, int i, int j) { [k!-;mi
int temp = data; ~."!l'a
data = data[j]; lfXH7jL2~
data[j] = temp; yLjV[qP
} +g)_4fV0|
} KlY,NSlQ