[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; >;Vy{bL8
} %617f=(E?!
int i1=l; k8O%gO
int i2=mid+1; (VB-5&b
for(int cur=l;cur<=r;cur++){ V^qkHm e
if(i1==mid+1) ILMXWw
data[cur]=temp[i2++]; +hzS'z)n&
else if(i2>r) .Uh|V-
data[cur]=temp[i1++]; q+cx.Rc#
else if(temp[i1] data[cur]=temp[i1++]; b";D*\=x
else B'~CFj0W%=
data[cur]=temp[i2++]; /6nj 4.xxc
} g: ,*Y^T
} ;}QM#5Xdt
%fB!XCW
} XWYLa8Ef
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改进后的归并排序: Ncsk~=[
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package org.rut.util.algorithm.support; -efB8)A
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import org.rut.util.algorithm.SortUtil; ;SVAar4r
T;Zv^:]0
/** bYB:Fe=2
* @author treeroot /4bHN:I]M
* @since 2006-2-2 CvB)+>oa
* @version 1.0 K %Qj<{)
*/ C ehz]C
public class ImprovedMergeSort implements SortUtil.Sort { {>8u/
;vLg4k
private static final int THRESHOLD = 10; .jvRUD8A7
,n\'dMNii
/* /I@Dv?
* (non-Javadoc) xa$p,_W:'
* uZkh.0yB
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) x>*#cOVz;C
*/ 3,$G?auW
public void sort(int[] data) { SVj4K\F
int[] temp=new int[data.length]; d|RDx;rl8
mergeSort(data,temp,0,data.length-1); ,BuEX#ZaBl
} 0w<G)p~%n
o%V%@q H
private void mergeSort(int[] data, int[] temp, int l, int r) { J4>k9~q
int i, j, k; DqbU$jt`
int mid = (l + r) / 2; gRQV)8uh
if (l == r) q:X&)f
return; SC/V3fW,
if ((mid - l) >= THRESHOLD) SRBQ"X[M2
mergeSort(data, temp, l, mid); ("5Eed
else {Bm7'%i
insertSort(data, l, mid - l + 1); N\Li/
if ((r - mid) > THRESHOLD) ';.n#
mergeSort(data, temp, mid + 1, r); FNB4YZ6
else SJ;Kjq.Qo
insertSort(data, mid + 1, r - mid); AW<z7BD
[|E|(@J
for (i = l; i <= mid; i++) { +!9&zYu!
temp = data; |*[#Iii'
} ;"j>k>tg
for (j = 1; j <= r - mid; j++) { Hb|y`Ok
temp[r - j + 1] = data[j + mid]; h:l4:{A64
} ]5`Y^hS_g
int a = temp[l]; V-.Nc#
int b = temp[r]; &R~)/y0]
for (i = l, j = r, k = l; k <= r; k++) { l7M![Ur
if (a < b) { %jRqrICd
data[k] = temp[i++]; 6i.!C5YX]
a = temp; /+{]?y,
} else { ,s.{R
data[k] = temp[j--]; ];VJ54
b = temp[j]; ,[t>N>10TH
} JC}oc M j0
} -|aNHZr
} p?qW;1
pXBlTZf
/** r"aJ&~8::W
* @param data w=MiJr#3^
* @param l dB%q`7O
* @param i )Fw{|7@N
*/ #mK?K
private void insertSort(int[] data, int start, int len) { SB}0u=5
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); (iO8[
} !1<?ddH6
} g Xi& S
} ~D$?.,=l
} LtIw{*3
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堆排序： &Y/Myh[P
U#{^29ik=o
package org.rut.util.algorithm.support; pcl'!8&7
s)<^YASg
import org.rut.util.algorithm.SortUtil; pz]T9ol~
rs?"pGz;
/** 4_'($FC1
* @author treeroot B[Gl}(E
* @since 2006-2-2 d5z?QI
* @version 1.0 FsdxLMwk1
*/ G*x"drP
public class HeapSort implements SortUtil.Sort{ f#3U,n8:
Pm*N!:u
/* (non-Javadoc) 2A^>>Q/,u
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !J@!P?0. C
*/ )QO"1#zg@c
public void sort(int[] data) { v2tKk^6`(i
MaxHeap h=new MaxHeap(); t:?8I9d
h.init(data); u_~*)w+mS@
for(int i=0;i h.remove(); ]IZn#gnM
System.arraycopy(h.queue,1,data,0,data.length); {vL4:K
} 6JYVC>i
tnCGa%M
private static class MaxHeap{ aOr'OeG(=e
3TS(il9A
void init(int[] data){ P$=BmBq18`
this.queue=new int[data.length+1]; |re>YQ!zd
for(int i=0;i queue[++size]=data; '@epiF&
fixUp(size); | ]DJz
} ;[ag|YU$Y
} 6zfi\(fop
QlmZ4fT[r
private int size=0; 4Sq[I
V&75n.L
private int[] queue; x?unE@?\S
,iQRf@#W_b
public int get() { O DLRzk(
return queue[1]; 'p{N5eM
} $%3"@$
?^< E#2a
public void remove() { {M.OOEcIp
SortUtil.swap(queue,1,size--); oJLpFL
fixDown(1); TfbB1
} TI9]v(
file://fixdown yi*2^??` 1
private void fixDown(int k) { v9<'nU WVR
int j; "GTlJqhk
while ((j = k << 1) <= size) { ]&dU%9S
if (j < size %26amp;%26amp; queue[j] j++; d*e0/#s
if (queue[k]>queue[j]) file://不用交换 Y$%z]i5
break; b85r=tm
SortUtil.swap(queue,j,k); :&{:$-h!
k = j; b3Uw"{p
} VJeoO)<j
} ds*N1[ *
private void fixUp(int k) { E,/<;
while (k > 1) { W@vt6v
int j = k >> 1; gNsas:iGM
if (queue[j]>queue[k]) 9uNkd2#
break; d=q&%gqN
SortUtil.swap(queue,j,k); ZJ$nHS?ra
k = j; [T(XwA)
} Y M<8>d
} 3($cBC
* 7<{Xbsj^
} $ e<108)]
jc4#k+sb
} 2+2Gl7" s
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SortUtil： e#+u8LrN
8,0WHivg
package org.rut.util.algorithm; R7q\^Yzo
Em%0C@C
import org.rut.util.algorithm.support.BubbleSort; CWTPf1?eB
import org.rut.util.algorithm.support.HeapSort; t+,'
import org.rut.util.algorithm.support.ImprovedMergeSort; lhx"<kR4
import org.rut.util.algorithm.support.ImprovedQuickSort; TQ/EH~Sz
import org.rut.util.algorithm.support.InsertSort; Z4^O`yS9+
import org.rut.util.algorithm.support.MergeSort; YT*_ vmJV
import org.rut.util.algorithm.support.QuickSort; 8zMt&5jD
import org.rut.util.algorithm.support.SelectionSort; SWX[|sjdB
import org.rut.util.algorithm.support.ShellSort; 95wi~^^
BrHw02G
/** Q|DVB
* @author treeroot ]tjQy1M
* @since 2006-2-2 AqdQiZ^9
* @version 1.0 @d+NeS
*/ _i/x4,=xv
public class SortUtil { !iys\ AV
public final static int INSERT = 1; zeHf(N
public final static int BUBBLE = 2; )g()b"Z #>
public final static int SELECTION = 3; g+X .8>=
public final static int SHELL = 4; U9*uXD1\
public final static int QUICK = 5; 4R(H@p%+r2
public final static int IMPROVED_QUICK = 6; ag_RKlM3
public final static int MERGE = 7; zF)&o}
public final static int IMPROVED_MERGE = 8; (R9{wGV [
public final static int HEAP = 9; T4M"s;::1
nQtp4
public static void sort(int[] data) { M_OvIU(E
sort(data, IMPROVED_QUICK); |#>:@{X<
} SJ4+s4!l <
private static String[] name={ nT;Rwz$3
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" `X:o]t@
}; KE~l#=S
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private static Sort[] impl=new Sort[]{ sa7F-XM
new InsertSort(), x$:P;#
new BubbleSort(), BidTrO
new SelectionSort(), Qf>$'C(7!a
new ShellSort(), tF/)DZ.to
new QuickSort(), mw\ z'
new ImprovedQuickSort(), 9tMaOm
new MergeSort(), 6H#4iMeh
new ImprovedMergeSort(), F=B[%4q`%
new HeapSort() !jySID?q
}; x @a3STKT
Q|6lp
public static String toString(int algorithm){ ev{;}2~V
return name[algorithm-1]; z>6hK:27
} (\I9eBm
Rs +),
public static void sort(int[] data, int algorithm) { gfW_S&&q
impl[algorithm-1].sort(data); "KiTjl`M,
} ,\Q^[e!m~
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public static interface Sort { ;h-W&i7
public void sort(int[] data); DH>>u
} HkL:3 E.
*6`};ASK
public static void swap(int[] data, int i, int j) { V?zCON
int temp = data; vT&) 5nN
data = data[j]; )&") J}@
data[j] = temp; blk4@pg
} QyEGK
} 'Zket=Sm;