[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; gm8L5c V
} /MsXw/],
int i1=l; Lcplc"C
int i2=mid+1; n?&G>`u*
for(int cur=l;cur<=r;cur++){ n5 @H
if(i1==mid+1) v[CX-CBZ?
data[cur]=temp[i2++]; 9%oLv25{)
else if(i2>r) j9%u&
data[cur]=temp[i1++]; Z4}Yw{=f
else if(temp[i1] data[cur]=temp[i1++]; $rs7D}VNc
else wGd8q xa
data[cur]=temp[i2++]; 9+@_ZI-
} T#J]%IDd
} k<"ZNQm$.
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} Xo(K*eIN
LGK0V!W
改进后的归并排序: CcgCKT
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package org.rut.util.algorithm.support; #$K\:V+ 4
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import org.rut.util.algorithm.SortUtil; h_?D%b~5
5LhFD
/** p}R)qz-=5U
* @author treeroot PAH; +
* @since 2006-2-2 [@#P3g\:>W
* @version 1.0 +q) ^pCC
*/ oQ8W0`bZa
public class ImprovedMergeSort implements SortUtil.Sort { D?qA aq&4
jFw?Ky2
private static final int THRESHOLD = 10; nXb;&n%
ED[PP2[/
/* \4~uop,Nb+
* (non-Javadoc) cc.zC3Hs3
* p[hA?dXn
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 3tS~/o+]
*/ Th`IpxV
public void sort(int[] data) { j9) Z'L
int[] temp=new int[data.length]; 50l=B]M
mergeSort(data,temp,0,data.length-1); w80g)4V+
} -2K`:}\y&
q,^^c1f
private void mergeSort(int[] data, int[] temp, int l, int r) { E>KV1P
int i, j, k; j?g{*M
int mid = (l + r) / 2; N02N w(pi
if (l == r) P[8`]=
return; 7od!:<v/
if ((mid - l) >= THRESHOLD) )<1M'2
mergeSort(data, temp, l, mid); jToA"udW/
else u(\b1h n
insertSort(data, l, mid - l + 1); Ue^upx
if ((r - mid) > THRESHOLD) -_%n\#
mergeSort(data, temp, mid + 1, r); hCc_+/j|
else ]EE}ax%#aq
insertSort(data, mid + 1, r - mid); +[V?3Gdb
(4>k+ H
for (i = l; i <= mid; i++) { ;I:jd")
temp = data; A>xFNem
} F[l{pc "C
for (j = 1; j <= r - mid; j++) { Zc{at}{
temp[r - j + 1] = data[j + mid]; x!tCK47Yq
} 3O:Z;YP:<
int a = temp[l]; JyjS#BWi
int b = temp[r]; _Sosw|A
for (i = l, j = r, k = l; k <= r; k++) { ^bexXYh
if (a < b) { %_(e{Mf)
data[k] = temp[i++]; ](aXZ<,
a = temp; ES(b#BlrP/
} else { W-<C%9O!
data[k] = temp[j--]; GW]Ygf1t
b = temp[j]; tOn/r@Fd^E
} K!).QB'
} }<[@)g.h.
} 38tRb"3zP
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/** ) 'j7Ra
* @param data cDYKvrPY
* @param l <2fZYt vt
* @param i kbN2dL
*/ JpcG5gX^B
private void insertSort(int[] data, int start, int len) { XPBKQm_}
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); &_x:+{06
} }:])1!a
} ey_3ah3x
} @dvlSqm)
} @a'Rn
k-Hy>5;
堆排序： *Ew`Fm H
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package org.rut.util.algorithm.support; hbl:~O&a/
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import org.rut.util.algorithm.SortUtil; h8&VaJ
c$Z3P%aP'V
/** 8d?r )/~
* @author treeroot *P7 H=Yf&
* @since 2006-2-2 3+%a
* @version 1.0 4@AY~"dq
*/ "oz : & #+
public class HeapSort implements SortUtil.Sort{ <~@}r\
2Nrb}LH
/* (non-Javadoc) 1xP*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) o,>9|EMQZ
*/ Xia4I* *
public void sort(int[] data) { J~Uq'1?
MaxHeap h=new MaxHeap(); hfE5[
h.init(data); :[xFp}w{
for(int i=0;i h.remove(); mE=%+:o.
System.arraycopy(h.queue,1,data,0,data.length); NX%"_W/W
} 'i+j;.
fUx;_GX?
private static class MaxHeap{ f8E,.$>
4zKmoYt
void init(int[] data){ vX1 8 ]
this.queue=new int[data.length+1]; iga.B
for(int i=0;i queue[++size]=data; ;}1O\nngR
fixUp(size); dDYD6
} H c,e&R
} cQ}3? v
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private int size=0; Yw=7(}
qQjd@J}^
private int[] queue; StLFq6BO
n=Ze p{^
public int get() { 3Gi^TXE]
return queue[1]; Gk:tT1
} Hq$&rNnq\
4}4cA\B:n
public void remove() { 5tx!LGOK
SortUtil.swap(queue,1,size--); $,u>,
fixDown(1); &_cH9zw@
} \MqOHM.[
file://fixdown ?}g^/g !
private void fixDown(int k) { q"(b}3
int j; {ooztC
while ((j = k << 1) <= size) { )iX2r{
if (j < size %26amp;%26amp; queue[j] j++; ci 4K Nv;
if (queue[k]>queue[j]) file://不用交换 HTz5LAe~b7
break; *'w?j)}A9g
SortUtil.swap(queue,j,k); a\-AGG{2/X
k = j; W6gI#
} =j~BAS*"
} 7+9o<j@@o
private void fixUp(int k) { H2lQ(Y+H
while (k > 1) { y%Rq6P=4Q
int j = k >> 1; &&% oazR=
if (queue[j]>queue[k]) Gsn$r(m{K
break; %u}#|+8}
SortUtil.swap(queue,j,k); mq}V @H5
k = j; E)%DLZ
} `L LS|S]
} 12VIP-ABK
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} t!-\:8n
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} NX4G;+6
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SortUtil： \sz*M B
w_h{6Kc<
package org.rut.util.algorithm; |k$6"dXSO
ZIN1y;dJ
import org.rut.util.algorithm.support.BubbleSort; 8WE@ X)e
import org.rut.util.algorithm.support.HeapSort; !9.k%B:
import org.rut.util.algorithm.support.ImprovedMergeSort; IR:GoD+
import org.rut.util.algorithm.support.ImprovedQuickSort; U&i#cF
import org.rut.util.algorithm.support.InsertSort; S B~opN
import org.rut.util.algorithm.support.MergeSort; 0!-'4+"
import org.rut.util.algorithm.support.QuickSort; 2vTO>*t
import org.rut.util.algorithm.support.SelectionSort; ZC]|s[
import org.rut.util.algorithm.support.ShellSort; -T}r$A
)DmydyQ'
/** |a#=o}R_
* @author treeroot (gnN</%
* @since 2006-2-2 4> uNH5
* @version 1.0 SwsJ<Dq^z
*/ v%$l(
public class SortUtil { JH| D
public final static int INSERT = 1; eL>wKu:r
public final static int BUBBLE = 2; ,4S[<(T"
public final static int SELECTION = 3; WMHYOJR
public final static int SHELL = 4; [[HCP8Wk
public final static int QUICK = 5; fF(AvMsO
public final static int IMPROVED_QUICK = 6; O1UArD
public final static int MERGE = 7; B`.aQ
public final static int IMPROVED_MERGE = 8; Mq#m;v$E
public final static int HEAP = 9; o{>4PZ}=g
'z^'+}iyv
public static void sort(int[] data) { J6[}o4Z
sort(data, IMPROVED_QUICK); JNY?]|=
} 'Kk/ J+6U
private static String[] name={ $@@ii+W}\
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" |fywqQFq
}; !zt>& t
r&Nh>6<&/
private static Sort[] impl=new Sort[]{ z Ohv>a
new InsertSort(), 6/#+#T
new BubbleSort(), sVr|kvn2
new SelectionSort(), L){V(*K '
new ShellSort(), $3B%4#s
new QuickSort(), |$6Ten[B#
new ImprovedQuickSort(), n-2!<`UFX
new MergeSort(), f,i2U|1pbj
new ImprovedMergeSort(), ?A;RTM
new HeapSort() o2B|r`R
}; 4i.&geXA.
l?$X.CwX
public static String toString(int algorithm){ :!l.ze{F
return name[algorithm-1]; f[D%(
} Qy"%%keV'T
:-#7j} R&
public static void sort(int[] data, int algorithm) { 5=8v\q?)c
impl[algorithm-1].sort(data); Zyr|J!VF
} J~xm[^0
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public static interface Sort { 7FkiT
public void sort(int[] data); ftcLP
} zRmVV}b
wl%ysM|x
public static void swap(int[] data, int i, int j) { %z.V$2
int temp = data; ygV_"=+|N
data = data[j]; B_iaty
data[j] = temp; Xs|d#WbX
} xjF>AAM_Px
} GFE3p