[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; d:j65yu
} [;?CO<
int i1=l; Owe"x2D\
int i2=mid+1; UDBMf2F]
for(int cur=l;cur<=r;cur++){ }:04bIaV
if(i1==mid+1) IE^xk@
data[cur]=temp[i2++]; >-%tvrS%
else if(i2>r) "s$$M\)T
data[cur]=temp[i1++]; {WYJQKs8
else if(temp[i1] data[cur]=temp[i1++]; DW@|H
else jN[P$}#b`
data[cur]=temp[i2++]; F'~\!dNL
} No|T#=BZ[
} %<^IAMkp
dH5 Go9`~R
} 4l2/eh]Hc(
H ~VeY\:w
改进后的归并排序: mz[Q]e~&i
{5GXN!f
package org.rut.util.algorithm.support; -:$#koW
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import org.rut.util.algorithm.SortUtil; K:<j=j@51
[w1 4hHnq
/** pXoD*o b
* @author treeroot ktA5]f;
* @since 2006-2-2 z(YzK
* @version 1.0 d~0k}|>
*/ (dH "b *
public class ImprovedMergeSort implements SortUtil.Sort { I_dO*k%l
#YiphR&
private static final int THRESHOLD = 10; 51sn+h<w
:637MD>5lO
/* MWl2;qi
* (non-Javadoc) ><&>JgM
* *eF'<._[U
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) V_x8 Q+~?
*/ 3i*HwEh
public void sort(int[] data) { c:d.mkF\
int[] temp=new int[data.length]; e+TSjm
mergeSort(data,temp,0,data.length-1); <n;9IU
} !l(O$T9T
`K%f"by
private void mergeSort(int[] data, int[] temp, int l, int r) { ?LwBF;Y
int i, j, k; H(QbH)S$6
int mid = (l + r) / 2; ^oLMgz
if (l == r) -4;$NiB?
return; vWs#4JoG
if ((mid - l) >= THRESHOLD) {%&!x;%
mergeSort(data, temp, l, mid); 59@PY!c>
else x+Ws lN2a
insertSort(data, l, mid - l + 1); CVAX?c{
if ((r - mid) > THRESHOLD) N 4!18{/2
mergeSort(data, temp, mid + 1, r); Ib&]1ger#=
else +$;#bw)yH
insertSort(data, mid + 1, r - mid); ]4X08Cm^
5qL;@Y
for (i = l; i <= mid; i++) { O{<uW-
temp = data; ~VKuRli|m
} Ux!q(9<_
for (j = 1; j <= r - mid; j++) { <Od5}
temp[r - j + 1] = data[j + mid]; (g*mC7 HN
} y0R9[;b07
int a = temp[l]; * YR>u@
int b = temp[r]; :'$V7LZ5
for (i = l, j = r, k = l; k <= r; k++) { M669G;w(K
if (a < b) { `'vNHY
data[k] = temp[i++]; kM;}$*?
a = temp; hU~up a<dD
} else { 4}r.g0L
data[k] = temp[j--]; 1)BIh~1{p
b = temp[j]; N|3a(mtiZ'
} DUMC4+i
} 1G}\IK1+
} \gW6E^
#trb4c{{5
/** ;uhpo
* @param data .5E6MF
* @param l +v)+ k
* @param i bCg)PJuB
*/ rUW/d3y
private void insertSort(int[] data, int start, int len) { 0PdX>h.t
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); g@Z7f y7
} T!2gOe
} 9$WA<1PK+
} #PGpB5vnaA
} ( d1ho=
"+Kp8n6
堆排序： iGw\A!}w\
p;<aZ&@O
package org.rut.util.algorithm.support; VD90JU]X<
^5Ob(FvU
import org.rut.util.algorithm.SortUtil; /_V4gwb}|-
GDwijZw
/** o<L=l Q
* @author treeroot =kBWY9:$,
* @since 2006-2-2 \Z^Tk
* @version 1.0 *@fVogr^
*/ 1$nuh@-ys
public class HeapSort implements SortUtil.Sort{ ,D93A
BUU ) Sz
/* (non-Javadoc) S<Uv/pn
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) t}2M8ue(&
*/ S*(ns<L
public void sort(int[] data) { I8XU '
MaxHeap h=new MaxHeap(); ?#J;[y\^
h.init(data); gacE?bW'
for(int i=0;i h.remove(); 10ZL-7D#m
System.arraycopy(h.queue,1,data,0,data.length); dRXdV7-!
} dk@iAL*v
m8z414o
private static class MaxHeap{ l/6(V:
Yp6% @c6\
void init(int[] data){ $m0-IyXcv
this.queue=new int[data.length+1]; 2VgVn,c
for(int i=0;i queue[++size]=data; csms8J
fixUp(size); e%v0EJ},
} nCSXvd/
} '-KrneZ!
E@S5|CM
private int size=0; :t6.J
9|&%"~6'
private int[] queue; o3xfif
] KR\<MJK
public int get() { f*GdHUZ*
return queue[1]; ,?>:Cdz4
} e(;nhU3a*,
X?Z#k~JR
public void remove() { .5YIf~!59
SortUtil.swap(queue,1,size--); x2 m A
fixDown(1); qC$h~Epp4
} xN]88L}Tn
file://fixdown zFGZ;?i
private void fixDown(int k) { `DcZpd.n
int j; sXm,y$\m
while ((j = k << 1) <= size) { Tq=OYJq5U
if (j < size %26amp;%26amp; queue[j] j++; <-m?l6
if (queue[k]>queue[j]) file://不用交换 uZ7~E._
break; 0G"I}Jp{
SortUtil.swap(queue,j,k); ]aVFWzey
k = j; mtu`m6Xix
} a]u1_$)
} /?Fa<{
private void fixUp(int k) { 6=xbi{m$
while (k > 1) { J#tY$PE
int j = k >> 1; U,)@+?U+h
if (queue[j]>queue[k]) ~}F$1;t0
break; JYU0&nZl4
SortUtil.swap(queue,j,k); kqie|_y
k = j; ;\N${YIn
} 6Y(Vs>
} 0(~,U!g[=
3-Xc3A=w
} Ib665H7w
3gzcpFNqX
} v5!G/TZ1
KZ}F1Mr
SortUtil： FD*w4U5
, ,=7deR
package org.rut.util.algorithm; 8C!D=Vhh
-Y"'=zkO
import org.rut.util.algorithm.support.BubbleSort; @(_M\>!%M
import org.rut.util.algorithm.support.HeapSort; fooQqWC)
import org.rut.util.algorithm.support.ImprovedMergeSort; Q-LDFnOFwp
import org.rut.util.algorithm.support.ImprovedQuickSort; muqIh!nn
import org.rut.util.algorithm.support.InsertSort; A(>kp=~
import org.rut.util.algorithm.support.MergeSort; ]jL`*tI\S
import org.rut.util.algorithm.support.QuickSort; 3d0Yq
import org.rut.util.algorithm.support.SelectionSort; (e$/@3*
import org.rut.util.algorithm.support.ShellSort; C/L+:b&x~
p|b&hgA
/** ]C me)&hX
* @author treeroot z<rYh96uA
* @since 2006-2-2 mVBF2F<4
* @version 1.0 5c~OG6COx
*/ 1li1&
public class SortUtil { ped3}i+|]
public final static int INSERT = 1; >{dj6Wo
public final static int BUBBLE = 2; #' =rv
public final static int SELECTION = 3; `Oc`I9
public final static int SHELL = 4; L8FLHT+R-
public final static int QUICK = 5; G'>z~I]6S
public final static int IMPROVED_QUICK = 6; !y>MchNv
public final static int MERGE = 7; |# zznT"
public final static int IMPROVED_MERGE = 8; mne=9/sE"
public final static int HEAP = 9; ,DT=(
u/% 4WgA
public static void sort(int[] data) { AF qut
sort(data, IMPROVED_QUICK); W1UG\d`2
} 3ee?B~Tun
private static String[] name={ Q\DD^Pbq
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" kS$HIOt823
}; *WQ}ucE^#
:z EhPx;B7
private static Sort[] impl=new Sort[]{ +C{ %pF
new InsertSort(), [akyCb
new BubbleSort(), z5CWgN
new SelectionSort(), q?=eD^]
new ShellSort(), a%-P^M;a2
new QuickSort(), Xj\SJ*
new ImprovedQuickSort(), q >9F21W
new MergeSort(), aeESS;JxJj
new ImprovedMergeSort(), A|BvRZd
new HeapSort() nx(O]R,Sw
}; L}&U%eD
E6-alBi%
public static String toString(int algorithm){ ZU&I`q|Y6
return name[algorithm-1]; ?^F#}>C
} c0Tda
U+!H/R)(
public static void sort(int[] data, int algorithm) { R,hX *yVq
impl[algorithm-1].sort(data); NC 0H5
} 2 AZ[gr@c
~67L
public static interface Sort { nD\X3g`V
public void sort(int[] data); S-8O9
} [`^x;*C
iaR^]|7_
public static void swap(int[] data, int i, int j) { _"ysJ&
int temp = data; :B=p%C
data = data[j]; urHQb5|T}
data[j] = temp; Zcg=a_
} vXnTPjbE
} ;X u&['