[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; g2vt(Gf;
} mC$te
int i1=l; ?es9j]
int i2=mid+1; /VFQbJ+`
for(int cur=l;cur<=r;cur++){ |}: D_TX
if(i1==mid+1) [fJxbr"
data[cur]=temp[i2++]; +jN)$Y3Ya
else if(i2>r) Bnz}:te}
data[cur]=temp[i1++]; gF]IAZCi
else if(temp[i1] data[cur]=temp[i1++]; P@<K&S+f
else " ;o,D
data[cur]=temp[i2++]; @7sHFwtar?
} ,D.@6bJW
} 2h)*
.B!L+M< [
} 3!Mb<W.3
- v=ndJ.
改进后的归并排序: 1`1Jn*|TI
lrgvY>E0
package org.rut.util.algorithm.support; /GA-1cS_(
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import org.rut.util.algorithm.SortUtil; AY]rQ:I
)LL.fPic
/** ;`Sn66&
* @author treeroot (9)uZ-BF,
* @since 2006-2-2 [C3wjYi
* @version 1.0 U9Lo0K
*/ tbB.n
public class ImprovedMergeSort implements SortUtil.Sort { YCBUc<)
>qdRqy)DC
private static final int THRESHOLD = 10; +p-S36K~,7
yg%T{hyzH
/* (OG>=h8?
* (non-Javadoc) CelM~W$=u
* 5(DnE?}vo
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) rD>q/,X=\
*/ /b{Ufo3v
public void sort(int[] data) { i;67<f}-
int[] temp=new int[data.length]; =I$:-[(
mergeSort(data,temp,0,data.length-1); j2|UuWU
} Iy2AJ|d.
'fIG$tr9X
private void mergeSort(int[] data, int[] temp, int l, int r) { =/N0^
int i, j, k; =Q8$O 2TW
int mid = (l + r) / 2; YY$O"!."
if (l == r) ,*wj~NE
return; jG^OF5.
if ((mid - l) >= THRESHOLD) ra]\!;}L0
mergeSort(data, temp, l, mid); UQ2;Dg G%
else >kV=h?]Y
insertSort(data, l, mid - l + 1); H"rIOoxf
if ((r - mid) > THRESHOLD) Bs-MoT!
mergeSort(data, temp, mid + 1, r); w'Jo).OW~
else 6oGF6C
insertSort(data, mid + 1, r - mid); g1q%b%8T
rgu7g
for (i = l; i <= mid; i++) { =1j`VJU9
temp = data; jE$]Z(Ab
} HF%)ip+
for (j = 1; j <= r - mid; j++) { 'L6+B1Op
temp[r - j + 1] = data[j + mid]; PLWx'N-kqL
} &&n-$WEl
int a = temp[l]; M5B?`mTl
int b = temp[r]; lJ<( mVt
for (i = l, j = r, k = l; k <= r; k++) { D]Gt=2\NG9
if (a < b) { MLn?t^v-
data[k] = temp[i++]; G]I^zd&P
a = temp; m6 a@Y<
} else { Va\?"dH>M
data[k] = temp[j--]; LYS[qLpf
b = temp[j]; Q#I?nBin
} Y.o-e)zX
} ptpu u=3"
} |R>I#NO5
h!1CsLd[
/** K/LoHWy+n*
* @param data jF%l\$)/
* @param l @xAfD{}f!
* @param i g8;JpPw
*/ V, e
private void insertSort(int[] data, int start, int len) { p:qj.ukw
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ^ `Y1
} 9Dx9alJR
} }!Xj{Eoc
} f@J-6uQ7w
} C9cQ} j:
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堆排序： %D*yXNsY
3Y=?~!,Jk
package org.rut.util.algorithm.support; rxAb]~MMp
n5 jzVv
import org.rut.util.algorithm.SortUtil; y:8Oc?
z,=k F I
/** .JL?RH2@8
* @author treeroot RLbxNn
* @since 2006-2-2 TWJ%? /d
* @version 1.0 ?1MaA
*/ v]BMET[w
public class HeapSort implements SortUtil.Sort{ )WazbT@
XDq*nA8#5B
/* (non-Javadoc) l050n9#9p
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $Z^HI
*/ 9p<ZSh
public void sort(int[] data) { T=->~@5
MaxHeap h=new MaxHeap(); C9FQo7
h.init(data); 8Dy;'BtT
for(int i=0;i h.remove(); [?Q$b5j/M
System.arraycopy(h.queue,1,data,0,data.length); +0WI;M4i
} s:#\U!>0`
/CN`U7:E
private static class MaxHeap{ E:ocx2dp
E14Dq#L
void init(int[] data){ ~uz4
this.queue=new int[data.length+1]; 2:l8RH!Y
for(int i=0;i queue[++size]=data; ?)B\0` %*'
fixUp(size); y2,M9
} {QTnVS't 0
} 4&([<gyR<
m339Y2%=
private int size=0; -V)DKf"f
-:o4|&g<*
private int[] queue; P ||:?3IH
Do5)ilt
public int get() { *R6Ed
return queue[1]; K0O&-v0"1
} lZ9rB^!
P>3 ;M'KsO
public void remove() { /a!M6:,pX
SortUtil.swap(queue,1,size--); i>68gfx
fixDown(1); * "Z5bKL
} [<M~6]
file://fixdown Q)s[ls
private void fixDown(int k) { ^p433
int j; ("B[P/
while ((j = k << 1) <= size) { WD7IF+v
if (j < size %26amp;%26amp; queue[j] j++; qx~-(|s`H
if (queue[k]>queue[j]) file://不用交换 >FabmIcC
break; K`?",G?_
SortUtil.swap(queue,j,k); Q-}yZ
k = j; Xn 1V1sr
} Q5H! ^RQm
} iFy_D
private void fixUp(int k) { /!mF,oR!
while (k > 1) { CQx#Xp>=s
int j = k >> 1; >3a<#s{%
if (queue[j]>queue[k]) (}u2) 9
break; ]l WEdf+
SortUtil.swap(queue,j,k); _c4kj
k = j; af<R.
} 2\p8U#""
} 9zKrFqhNo
r2]KP(T8|
} ]%L?b-e
`i,l)X]
} *Jy'3o
ZYy?JDAO
SortUtil： |aovZ/b4
`'Af`u\R
package org.rut.util.algorithm; )E.!jL:g
w+NdEE4H9z
import org.rut.util.algorithm.support.BubbleSort; MM*B.y~TxZ
import org.rut.util.algorithm.support.HeapSort; .A. VOf_
import org.rut.util.algorithm.support.ImprovedMergeSort; "[rChso
import org.rut.util.algorithm.support.ImprovedQuickSort; Hq*\,`b&
import org.rut.util.algorithm.support.InsertSort; uwcm%N;I"
import org.rut.util.algorithm.support.MergeSort; #Jo#[-r
import org.rut.util.algorithm.support.QuickSort; uoM;p'
import org.rut.util.algorithm.support.SelectionSort; 8i=c|k,GL.
import org.rut.util.algorithm.support.ShellSort; >vPDF+u
#~(VOcRI
/** ? %9-5"U[
* @author treeroot AUm"^-@x#>
* @since 2006-2-2 c05kHB$O
* @version 1.0 .BR2pf|R
*/ Ip0~
public class SortUtil { ?W*{%my
public final static int INSERT = 1; o&GS;{Rs
public final static int BUBBLE = 2; G'5p/:
public final static int SELECTION = 3; gxIGL-1M
public final static int SHELL = 4; :4f>S)m
public final static int QUICK = 5; GEdWpYKS-`
public final static int IMPROVED_QUICK = 6; \CP)$0j-&o
public final static int MERGE = 7; ok"v`76~f5
public final static int IMPROVED_MERGE = 8; G>/Gw90E
public final static int HEAP = 9; -.>b7ui
Nm.H
public static void sort(int[] data) { K\7\
sort(data, IMPROVED_QUICK); [<+A?M=
} 5v f?E"\r
private static String[] name={ fZqqU|tq
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" !y&uK&1
}; ,dTRM
3 ?1qI'5
private static Sort[] impl=new Sort[]{ (}W+W\.
new InsertSort(), a5/6DK>
new BubbleSort(), b1(7<o
new SelectionSort(), 3 %ppvvQ
new ShellSort(), F3XB};
new QuickSort(), LyaFWx
new ImprovedQuickSort(), 1VlRdDg
new MergeSort(), 4$);x/ a
new ImprovedMergeSort(), 7hs1S|
new HeapSort() J|9kWjOf+i
}; X0\2qD
-bN;nSgb
public static String toString(int algorithm){ OT*C7=
return name[algorithm-1]; q`HuVilNH
} _.9):i2<SF
x}Y
public static void sort(int[] data, int algorithm) { -VqZw&"
impl[algorithm-1].sort(data); tai=2,'
} TN xl?5:
uANG_sX^n
public static interface Sort { jT~PwDSFt3
public void sort(int[] data); M.|cl#
} ,f4VV\
Q]9+-p(=
public static void swap(int[] data, int i, int j) { e7m>p\"
int temp = data; oNyVRH ZH
data = data[j]; 7,MDFO{n
data[j] = temp; [g bYIwL.
} 0zQ^ 6@
} ne]P-50