[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; \8xSfe
} BzfR8mD
int i1=l; BaQyn 6B
int i2=mid+1; E4% -*n
for(int cur=l;cur<=r;cur++){ 5f7id7SI
if(i1==mid+1) ^t})T*hM0
data[cur]=temp[i2++]; Oo :Dt~Ib
else if(i2>r) RvAgv[8
data[cur]=temp[i1++]; or*{P=m+R
else if(temp[i1] data[cur]=temp[i1++]; gHPJiiCv
else @mCe{r*`
data[cur]=temp[i2++]; MSmr7%g3D
} f- XUto
} &<;T$Y
vqN/crJ@
} DP@1to@
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改进后的归并排序: DT`HS/~fH
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package org.rut.util.algorithm.support; Ye3o}G9z
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import org.rut.util.algorithm.SortUtil; Oz6$u
|N`0G.#
/** dNgA C){w
* @author treeroot kU/MvoV
* @since 2006-2-2 WJD2(el
* @version 1.0 jQV[zcM
*/ p9)YRLOh.
public class ImprovedMergeSort implements SortUtil.Sort { Q/SO%E`E
)Dz]Pv]H'
private static final int THRESHOLD = 10; ym|7i9
L?/AKg
/* HF*0
* (non-Javadoc) +#eol~j9N
* @4y?XL(n
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Aars\
*/ ',R%Q0Q
public void sort(int[] data) { |J!mM<*K
int[] temp=new int[data.length]; "<=4]Z
mergeSort(data,temp,0,data.length-1); 59zWB,y(P
} a=}1`Q
-|FHv+
private void mergeSort(int[] data, int[] temp, int l, int r) { >UCg3uFj
int i, j, k; TnN ythwZ
int mid = (l + r) / 2; nook/7]
if (l == r) :k_&Zd j,B
return; C~T,[U
if ((mid - l) >= THRESHOLD) a(vt"MQ_
mergeSort(data, temp, l, mid); IVPN=jg?
else q'8*bu_
insertSort(data, l, mid - l + 1); Rj";?.R*e
if ((r - mid) > THRESHOLD) 71@eJQ
mergeSort(data, temp, mid + 1, r); @ ;!IPiU
else HX2u{2$
insertSort(data, mid + 1, r - mid); *F%1~
?^Aj\z>
for (i = l; i <= mid; i++) { "|X'qKS(H{
temp = data; S9!KI)
} le \f:
for (j = 1; j <= r - mid; j++) { trDw|WA
temp[r - j + 1] = data[j + mid]; !Wr<T!T
} uZL]mwkj]
int a = temp[l]; 4m<]qw
int b = temp[r]; skl3/!
for (i = l, j = r, k = l; k <= r; k++) { vSHPN|*
if (a < b) { d3q%[[@
data[k] = temp[i++]; xmnBG4,f
a = temp; <<01@Q <
} else { znE1t%V
data[k] = temp[j--]; dXxf{|gk>
b = temp[j]; 5@5*}[M
} _5rKuL
} c~tl0XU1
} rhkKK_
|Lg2;P7\
/** &lLk[/b
* @param data ,;t:x|{%
* @param l _]*YSeh=
* @param i JxinfWk
*/ {?:]'c
private void insertSort(int[] data, int start, int len) { ;\w3IAa|V
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); b+a+OI D
} k{mBG9[z
} 3*I\#Z4p1
} ^gcB+
} bdWdvd:
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堆排序： W7n^]~V
YA pC|R,^
package org.rut.util.algorithm.support; T^;b98*
N*36rR$^
import org.rut.util.algorithm.SortUtil; _]5UuIMl
PR"x&JG@
/** fof}I:vO
* @author treeroot Y#c439&
* @since 2006-2-2 fYPu%MN7
* @version 1.0 kS_#8I
*/ 8$~oiK%fw
public class HeapSort implements SortUtil.Sort{ @ovaOX
7V5c`:"
/* (non-Javadoc) eHvUgDt
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) l8?C[,K%
*/ :jv(-RTI
public void sort(int[] data) { L'Cd`.yVO
MaxHeap h=new MaxHeap(); A4,%l\di<
h.init(data); BlpyE[h T
for(int i=0;i h.remove(); ZY,$oFdsi
System.arraycopy(h.queue,1,data,0,data.length); 'l(s)Oa{M:
} zI[<uvxzW`
/lR*ab
private static class MaxHeap{ 8a*&,W
1av#u:jy~>
void init(int[] data){ *jhgCm
this.queue=new int[data.length+1]; 'nPI zK<v
for(int i=0;i queue[++size]=data; =-Hhm($n
fixUp(size); .I~:j`K6
} WA2NjxYz
} [q%`q`EG
\2;!}
private int size=0; FNUs .d"
O>~@>/#
private int[] queue; JYWoQ[ZO#>
%ud-3u52M8
public int get() { p^ (Z
return queue[1]; w#)u+^-
} T(u;<}e@[
+JYb)rn$^
public void remove() { tRI<K
SortUtil.swap(queue,1,size--); "y~*1kBu
fixDown(1); q`mxN!1[
} sDBSc:5+e
file://fixdown ~8&->?{
private void fixDown(int k) { ! 7V>gWhR
int j; H_@6!R2
while ((j = k << 1) <= size) { Eb~vNdPo
if (j < size %26amp;%26amp; queue[j] j++; Ag2~q
if (queue[k]>queue[j]) file://不用交换 }&+,y<>
break; _*UI}JtlS
SortUtil.swap(queue,j,k); :q3w;B~
k = j; 3:Nc`tM_
} mC@v,"
} Gjeb)Y6N
private void fixUp(int k) { g"" 1\rc=
while (k > 1) { MJX4;nbl
int j = k >> 1; ??aO3Vm{
if (queue[j]>queue[k]) -3yK>\y=|
break; 5ph CEKt;
SortUtil.swap(queue,j,k); rZwSo]gp
k = j; (z8ZCyq7r[
} vcj(=\ e8v
} fsPsP`|
Q\s+w){f%
} @_"cMU!
nGWy4rY2S
} gdD|'h
,{G\-(\
SortUtil： vTFG*\Cq
F&uiI;+zJ
package org.rut.util.algorithm; 8y5"X"U
#y:F3$c
import org.rut.util.algorithm.support.BubbleSort; |BM#rfQ
import org.rut.util.algorithm.support.HeapSort; rAtCG1Vr
import org.rut.util.algorithm.support.ImprovedMergeSort; Lk]|;F-2i
import org.rut.util.algorithm.support.ImprovedQuickSort; 9h+Hd&=
import org.rut.util.algorithm.support.InsertSort; ,j>FCj>
import org.rut.util.algorithm.support.MergeSort; @7"n X
import org.rut.util.algorithm.support.QuickSort; wz3X;1l`c
import org.rut.util.algorithm.support.SelectionSort; Jc?zX8>Ae:
import org.rut.util.algorithm.support.ShellSort; G~C-tAB
5\zR>Tg".
/** (M|DNDM'd
* @author treeroot Q?T+^J
* @since 2006-2-2 G*EF_N.G0
* @version 1.0 M/Z$?nd_H
*/ TU)Pi.Aa
public class SortUtil { h/A\QW8Sd
public final static int INSERT = 1; ;]xc}4@=mg
public final static int BUBBLE = 2; _)<5c!
public final static int SELECTION = 3; uQbag]&j
public final static int SHELL = 4; ;;i419
public final static int QUICK = 5; b=S"o )>
public final static int IMPROVED_QUICK = 6; uSYI X
public final static int MERGE = 7; Y*pXbztP
public final static int IMPROVED_MERGE = 8; V?*fl^f
public final static int HEAP = 9; v+xrnz
O7IYg;
public static void sort(int[] data) { g&$5!ifgi
sort(data, IMPROVED_QUICK); KsTGae;ds
} q p}2
private static String[] name={ HfH+U&
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 3/usgw1
}; a0]GQyIG
wQ+il6
private static Sort[] impl=new Sort[]{ 837:;<T
new InsertSort(), @i'D)6sC
new BubbleSort(), Q)4[zStR#
new SelectionSort(), GQ?FUFuIoW
new ShellSort(), Ff>X='{
new QuickSort(), 5l@}1n
new ImprovedQuickSort(), [u*7( 4e
new MergeSort(), :j3^p8]
new ImprovedMergeSort(), a!6r&<s=E
new HeapSort() SJ22
}; cM9>V2:P
<,p$eQ)T%
public static String toString(int algorithm){ #O~pf[[L
return name[algorithm-1]; FTEC=j$ln
} /g*_dH)=
D1deh=
public static void sort(int[] data, int algorithm) { 7>@0nHec
impl[algorithm-1].sort(data); 20$Tky_
} ik?IC$*n3i
^y ', l
public static interface Sort { Ow1+zltgj-
public void sort(int[] data); "i&n;8?Y
} K)l*$h&-
D`Vb3aNB=L
public static void swap(int[] data, int i, int j) { #p;<X|Hc}8
int temp = data; 2=fLb7
data = data[j]; 7}\AhQ, S
data[j] = temp; [-#1;!k
} OY|9V
} w=-{njMz6&