[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; Fgk/Ph3r
} %"2B1^o>
int i1=l; uy{KV"%"^g
int i2=mid+1; X>>rvlDN
for(int cur=l;cur<=r;cur++){ BI]t}7
if(i1==mid+1) WG{/I/bJ_
data[cur]=temp[i2++]; mio'm
else if(i2>r) 9@B+$~:}7
data[cur]=temp[i1++]; 2[hl^f^%,
else if(temp[i1] data[cur]=temp[i1++]; OpE+e4~IF
else T5;D0tM/
data[cur]=temp[i2++]; m`"s$\fah
} KA#-X2U/
} P|U>(9;P,
U?{j
} O=/Tx2i;
E>D@#I>
改进后的归并排序: swA"_A8>u
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package org.rut.util.algorithm.support; quYZD6IH
s#[Ej&2[=
import org.rut.util.algorithm.SortUtil; Wg1WY}zG
Y<XDR:]A,
/** |93%,
* @author treeroot {Se93o
* @since 2006-2-2 '5--eYG
* @version 1.0 Vp$ckr
*/ -(G2@NG
public class ImprovedMergeSort implements SortUtil.Sort { !c7Od )]
/H%pOL6(r
private static final int THRESHOLD = 10; QPEv@laM
BKEB,K=K@
/* 5EUkp6Y
* (non-Javadoc) 0*/~9n-Vl
* ;}qCIyuO]
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +h/$_5
*/ O.dNhd$
public void sort(int[] data) { /'(P{O>{j
int[] temp=new int[data.length]; E=d[pI,e
mergeSort(data,temp,0,data.length-1); (I5ra_FVs
} =l+p nG
elN3B91\6r
private void mergeSort(int[] data, int[] temp, int l, int r) { zU%aobZ
int i, j, k; 3a0C<hW
int mid = (l + r) / 2; ;xc
if (l == r) 6eD[)_?]y
return; TxWjgW~
if ((mid - l) >= THRESHOLD) ;`+,gVrp
mergeSort(data, temp, l, mid); HChewrUAn
else 7d*<'k]{,
insertSort(data, l, mid - l + 1); s7?kU3y=s
if ((r - mid) > THRESHOLD) ~6nQ-
mergeSort(data, temp, mid + 1, r); N_0O""d
else wSK?mS6
insertSort(data, mid + 1, r - mid); hbK+\X
t-Wn@a
for (i = l; i <= mid; i++) { =DgD&_
temp = data; ;ORy&H aKl
} ;V GrZZ
for (j = 1; j <= r - mid; j++) { oCrn
temp[r - j + 1] = data[j + mid]; itU01
} l O^h)hrR
int a = temp[l]; V4H+m,R
int b = temp[r]; 9maw+c!~
for (i = l, j = r, k = l; k <= r; k++) { K*<n<;W
if (a < b) { 9=SZL~#CE
data[k] = temp[i++]; ^=ikxZyO
a = temp; d<Di;5
} else { w <ID<
data[k] = temp[j--]; mR^D55k
b = temp[j]; k#.co~kS
} @&+ 1b=
} <3bh-)
} ~"N]%Cu
vC7sJIch2<
/** ZttL*KK
* @param data _W+TZa@_
* @param l jd{J3s '%
* @param i ]~P?
*/ @lX)dY
private void insertSort(int[] data, int start, int len) { OL>/FOH:Fx
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 'e)t+
} m3D'7*U
} 4Zq5
} Xw%z#6l
} :97`IV%
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堆排序： JeA}d
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package org.rut.util.algorithm.support; :\[F=
+ y^s 6j}
import org.rut.util.algorithm.SortUtil; w-2]69$k
JTC&_6
/** TCEbz8ql
* @author treeroot P7o6B,9
* @since 2006-2-2 F ;D_zo?
* @version 1.0 %>.v[d1c
*/ bQ)r8[o!
public class HeapSort implements SortUtil.Sort{ "@n$(-.
Dt?Fs
/* (non-Javadoc) 4c% :?H@2
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) C{))T5G
*/ =mZw71,
public void sort(int[] data) { /vMpSN|3
MaxHeap h=new MaxHeap(); b?$3jOtW
h.init(data); P'K')]D=!
for(int i=0;i h.remove(); 4q[r KNl
System.arraycopy(h.queue,1,data,0,data.length); 'Zzm'pC
} efhwbn
|'.SOm9)*
private static class MaxHeap{ )_jO8)jB
!CWqI)=
void init(int[] data){ Cw_<t
this.queue=new int[data.length+1]; R[V%59#{Z
for(int i=0;i queue[++size]=data; x.q%O1
fixUp(size); CUG6|qu
} q8oEb
} 1@y?OWC
xQ[YQ!l
private int size=0; ~EN@$N^h
v<) }T5~r
private int[] queue; )Q8Q#S
ei5S<n
public int get() { itP_Vxo/H
return queue[1]; ^uj+d"a)
} ':,LZ A8A
@l?%]%v|
public void remove() { 34U~7P r9
SortUtil.swap(queue,1,size--); iqU}t2vFrj
fixDown(1); IFgF5VG6g
} v/.2Z(sZ
file://fixdown +bXZE
private void fixDown(int k) { p)oW'#@a
int j; OjCT%6hy;
while ((j = k << 1) <= size) { 23=;v@
if (j < size %26amp;%26amp; queue[j] j++; YmwVa s
if (queue[k]>queue[j]) file://不用交换 _EY:vv
break; H(AYtnvB
SortUtil.swap(queue,j,k); BZj[C=#x
k = j; H [v~
} Cn"N5(i
} gk&?h7P"<
private void fixUp(int k) { iTX.?*
while (k > 1) { &5a>5ZG}
int j = k >> 1; 3w@)/ujn
if (queue[j]>queue[k]) S HvML
break; zx!1jS
SortUtil.swap(queue,j,k); i{8=;
k = j; [bcqaT
} Frml'Vfq7
} N*xgVj*
^;2L`U@5
} d/^^8XUK
VTHDGBU
} j7W_%Yk|E
l>G#+#{
SortUtil： t.w?OyO
2P|-V};9
package org.rut.util.algorithm; ~vXul`x
1eJ\CdI
import org.rut.util.algorithm.support.BubbleSort; %ry>p(-pC(
import org.rut.util.algorithm.support.HeapSort; K'tz_:d|
import org.rut.util.algorithm.support.ImprovedMergeSort; sq^,l6es>
import org.rut.util.algorithm.support.ImprovedQuickSort; A@#dv2JzP
import org.rut.util.algorithm.support.InsertSort; ?G{fF H
import org.rut.util.algorithm.support.MergeSort; b,'./{c0
import org.rut.util.algorithm.support.QuickSort; ?SpI^Wn)[
import org.rut.util.algorithm.support.SelectionSort; _%P%~`?!
import org.rut.util.algorithm.support.ShellSort; F 6Ol5
FYj3! H
/** *be+x RY
* @author treeroot ug{F?LW[
* @since 2006-2-2 81g&WQ'
* @version 1.0 Bm?Ku7}.
*/ 9qPP{K,Pq2
public class SortUtil { Y~CS2%j
public final static int INSERT = 1; EKt-C_)U
public final static int BUBBLE = 2; eDm,8Se
public final static int SELECTION = 3; =SdWU}xn2
public final static int SHELL = 4; XyIw5 9
public final static int QUICK = 5; A(uN=r@O
public final static int IMPROVED_QUICK = 6; <L`R!}
public final static int MERGE = 7; OJK/>
public final static int IMPROVED_MERGE = 8; +VeLd+Q}
public final static int HEAP = 9; crT[;w
qm '$R3g
public static void sort(int[] data) { p?`N<ykF<
sort(data, IMPROVED_QUICK); ,Q:dAe[ZsX
} _#+9)*A
private static String[] name={ EZHEJW'JnE
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" cD>o(#x]
}; {> }U>V
ANNL7Z3C
private static Sort[] impl=new Sort[]{ ZO`d
new InsertSort(), 25TEbp[dy
new BubbleSort(), tEeMl =u
new SelectionSort(), i||YD-hkK
new ShellSort(), ?-VN+ d7
new QuickSort(), &a:aW;^A7
new ImprovedQuickSort(), Gnw>%f1@u
new MergeSort(), nGf@zJDb
new ImprovedMergeSort(), E|TzrH
new HeapSort() 3_-#
}; xq{4i|d)
'=2t(@aC
public static String toString(int algorithm){ U".-C`4v
return name[algorithm-1]; iO@wqbg$6
} ^Nu} HcC+
(UM+?]Qwy
public static void sort(int[] data, int algorithm) { #i,O "`4
impl[algorithm-1].sort(data); v:>P;\]r9M
} 8 2qe|XD4p
f6#H@ X
public static interface Sort { p<jr&zVEc>
public void sort(int[] data); -7`J(f.rYC
} 4{R`
n5i}J/Sa2
public static void swap(int[] data, int i, int j) { k8ck#%#}Wu
int temp = data; jQDxbkIuzE
data = data[j]; u2eqVrY
data[j] = temp; \Q$);:=qQ
} gXQ)\MY
} }8SHw|-