[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; eoG$.M"
} |Sy<@oq
int i1=l; )I^7)x
int i2=mid+1; SBfT20z[
for(int cur=l;cur<=r;cur++){ yDegcAn?
if(i1==mid+1) Kzm+GW3o[
data[cur]=temp[i2++]; AicBSqUke
else if(i2>r) 3yU.& k
data[cur]=temp[i1++]; (mTE;s(
else if(temp[i1] data[cur]=temp[i1++]; QLvHQtzwX
else J$GUB3 G
data[cur]=temp[i2++]; 1VG4S){}\9
} Uyg5i[&X@
} aJbO((%$|u
~-_kM
} Gi?/C&1T
V)~.~2$
改进后的归并排序: QSdHm
v4`"1Ss,K
package org.rut.util.algorithm.support; AQ,' 6F9
'$ =>
import org.rut.util.algorithm.SortUtil; Mh:L$f0A%O
l3Q(TH~I
/** #*K}IBz
* @author treeroot t4zkt!`B
* @since 2006-2-2 9=8iy w
* @version 1.0 lhAX;s&9
*/ t\~P:"
public class ImprovedMergeSort implements SortUtil.Sort { |y!=J$$_H
/v1Q4mq
private static final int THRESHOLD = 10; =hC,@R>;
mD$A4Y-'p
/* >~[c|ffyo/
* (non-Javadoc) H8Bs<2
* `>f6)C-
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) (:TjoXXiY
*/ DEG[Z7Ju
public void sort(int[] data) { M"p
int[] temp=new int[data.length]; ;=eDO(Ij
mergeSort(data,temp,0,data.length-1); dJeNbVd
} ~J wb`g.
t{^*6XOcJ
private void mergeSort(int[] data, int[] temp, int l, int r) { -Ta9 pxZk
int i, j, k; 8dZSi
int mid = (l + r) / 2; Ce9|=Jx!
if (l == r) iNtaDX|%/
return; JQ8fdP A
if ((mid - l) >= THRESHOLD) r@h5w_9
mergeSort(data, temp, l, mid); q<[P6}.
else zZPuha8
insertSort(data, l, mid - l + 1); e6R}0w~G
if ((r - mid) > THRESHOLD) 9kN}c<o
mergeSort(data, temp, mid + 1, r); B(LWdap~
else ~:kZgUP_f
insertSort(data, mid + 1, r - mid); Fq~yL!#!
,Ys %:>?
for (i = l; i <= mid; i++) { ZRh~`yy
temp = data; 5[k/s}g
} 8=B|C'>
for (j = 1; j <= r - mid; j++) { M -cTRd-i
temp[r - j + 1] = data[j + mid]; ww\CQ6/h
} l&OKBUG
int a = temp[l]; [842&5Pd?
int b = temp[r]; DBW[{DE
for (i = l, j = r, k = l; k <= r; k++) { WejYy|
if (a < b) { *}F3M\
data[k] = temp[i++]; b~KDP+Ri
a = temp; Q]Y*K
} else { q0i(i.h
data[k] = temp[j--]; 8Wrh]egu1
b = temp[j]; !;&p"E|b#
} R]}}$R`j
} ]i&6c
} 5{|7$VqPF
gf#{k2r
/** -BrMp%C
* @param data _E&A{HkJ
* @param l 8n#HFJ~
* @param i PWaw]*dFmy
*/ [YRz*5
private void insertSort(int[] data, int start, int len) { #|Y5,a,{
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); /\ y?Y
} ~P*6ozSYpY
} 3m]4=
} bR*-Ht+wd
} KyVQh8
ocqU=^ta
堆排序： g`{;(/M+
8{wwd:6
package org.rut.util.algorithm.support; I WTwz!+
lGV0*Cji
import org.rut.util.algorithm.SortUtil; /f:dv?!km
=)M/@T
/** Hu\B"fdS
* @author treeroot M>wYD\oeg
* @since 2006-2-2 D"Bl:W'?j
* @version 1.0 /7aBDc-v
*/ =e/9&993
public class HeapSort implements SortUtil.Sort{ -V-RP;">
[.O?Z=5a[V
/* (non-Javadoc) YZLkL26[
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .f*4T4eR-
*/ _Zp}?b5Q
public void sort(int[] data) { 35Ij ..z0
MaxHeap h=new MaxHeap(); 54gBJEhg
h.init(data); $*^kY;
for(int i=0;i h.remove(); :#LLo}LKp
System.arraycopy(h.queue,1,data,0,data.length); T%.8'9
} %824Cqdc
*?5*m+
private static class MaxHeap{ ;X8yFq
EY^1Y3D w0
void init(int[] data){ opY@RJ]
this.queue=new int[data.length+1]; gFeO}otm
for(int i=0;i queue[++size]=data; a=1NED'
fixUp(size); }\z.)B4,
} RJL2J]*S
} #zG&|<hc
6.CbAi3Z
private int size=0; gQo]
;\a YlV-
private int[] queue; ~xA-V4.
X^T:8npxt
public int get() { KK1gNC4R
return queue[1]; !S^AgZ~
} 9i'jjN
$*SW8'],`
public void remove() { 3/aMJR:o
SortUtil.swap(queue,1,size--); S/}2;\Xm
fixDown(1); zO~8?jDN4|
} ,p4&g)o
file://fixdown vL|SY_:4
private void fixDown(int k) { M}`B{]lLz
int j; Q;[,Q~c[u
while ((j = k << 1) <= size) { 9*2[B"5
if (j < size %26amp;%26amp; queue[j] j++; W}3.E "K
if (queue[k]>queue[j]) file://不用交换 udxFz2>_l$
break; Uo-)pFN^
SortUtil.swap(queue,j,k); {J{+FFsr(
k = j; o}$XH,-9&
} =q>'19^Jx
} KX!T8+Y
private void fixUp(int k) { G,$PV e*
while (k > 1) { W0(_~
int j = k >> 1; E%+Dl=
if (queue[j]>queue[k]) RS"H8P4W
break; ks3`3q 7
SortUtil.swap(queue,j,k); LUG;(Fko
k = j; C+?Hm1
} Ipf|")*
} R?,an2
B.wYHNNV
} x4g3rmp
wAX1l*`
} l]@&D#3ZM
kQ4dwF~
SortUtil： m$`RcwO
GT~)nC9f
package org.rut.util.algorithm; pwO>h>ik
Scp7X7{N
import org.rut.util.algorithm.support.BubbleSort; 6,"IDH|ND
import org.rut.util.algorithm.support.HeapSort; il}%7b-
import org.rut.util.algorithm.support.ImprovedMergeSort; Wc,_RN-
import org.rut.util.algorithm.support.ImprovedQuickSort; ]p*l%(dhY
import org.rut.util.algorithm.support.InsertSort; ` BDLW%aL
import org.rut.util.algorithm.support.MergeSort; $@sEn4h
import org.rut.util.algorithm.support.QuickSort; 3j,Q`+l/6d
import org.rut.util.algorithm.support.SelectionSort; ]Gpxhg
import org.rut.util.algorithm.support.ShellSort; &yGaCq;0
5 elw~u
/** n/DP>U$I&
* @author treeroot nS/)P4z
* @since 2006-2-2 '/`= R
* @version 1.0 HqI t74+
*/ 4 d;|sI@
public class SortUtil { f_[<L
public final static int INSERT = 1; C2@,BCR
public final static int BUBBLE = 2; =2Bg9!zW>
public final static int SELECTION = 3; :Mb%A
public final static int SHELL = 4; -%2[2p
public final static int QUICK = 5; 0*%Z's\M"
public final static int IMPROVED_QUICK = 6; [OHxonU
public final static int MERGE = 7; ipQLK{]t
public final static int IMPROVED_MERGE = 8; dOqOw M.y
public final static int HEAP = 9; W4hbK9y
e&7JpT
public static void sort(int[] data) { D-8O+.@
sort(data, IMPROVED_QUICK); @[5xq
} P9=?zh6G.
private static String[] name={ Sczc5FG
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" &Ts-a$Z7?S
}; FQT~pfY
dA@'b5N{"
private static Sort[] impl=new Sort[]{ _Xnqb+
new InsertSort(), :{qv~&+C
new BubbleSort(), ~vs}.kb
new SelectionSort(), QF{4/y^j{
new ShellSort(), 7G.#O}).b
new QuickSort(), *&?c(JU;<
new ImprovedQuickSort(), HOw-]JSP2
new MergeSort(), m0LTx\w!
new ImprovedMergeSort(), Nndddk`
new HeapSort() j*F`"df
}; gT$Ju88
=3q/F7-
public static String toString(int algorithm){ mu?Eco`~
return name[algorithm-1]; )p T?/J
} rrQQZ5fhb
3BB%Z6F
public static void sort(int[] data, int algorithm) { .gG1kWA-
impl[algorithm-1].sort(data); qP{/[uj[K
} 7nHF@Y|*"
T6H}/#*tK
public static interface Sort { MxSM@3v(
public void sort(int[] data); )ap_Z6
} + ` s@
#?q&r_@@
public static void swap(int[] data, int i, int j) { V2$h8\a
int temp = data; CLeG<Hi ~
data = data[j]; 1&^MfP}
data[j] = temp; ZN!4;
} _u{c4U0,
} !O-C,uSm