[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; uYh!04u
} 02;jeZ#z
int i1=l; /0s1;?
int i2=mid+1; 3$|/7(M&DA
for(int cur=l;cur<=r;cur++){ Pvxb6\G&d
if(i1==mid+1) -`O{iHfM|P
data[cur]=temp[i2++]; f1 ;
else if(i2>r) VD;*UkapZx
data[cur]=temp[i1++]; ^HKXm#vAB
else if(temp[i1] data[cur]=temp[i1++]; oaIk1U;g
else SE'Im
data[cur]=temp[i2++]; d:=' Xs
} t R^f]+Up
} LrB 0x>
x~5uc$
} lx)^wAO4
@DN/]P
改进后的归并排序: 8&<mg;H,
jK|n^5\
package org.rut.util.algorithm.support; J4Gzp~{
*uvM6F$ut
import org.rut.util.algorithm.SortUtil; $y(;"hy
Obs#2>h
/** M\ATT%b:
* @author treeroot {,>G 1>Yv
* @since 2006-2-2 \DB-2*a"
* @version 1.0 C:QB=?%;
*/ o!a,r3
public class ImprovedMergeSort implements SortUtil.Sort { +QChD*
#:K=zV\
private static final int THRESHOLD = 10; 8Fn\ycX#"l
M0V<Ay\%O
/* Y|Iq~Qy~
* (non-Javadoc) ]aX@(3G1s
* $:9t(X)H
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) c*bvZC^6
*/ je] DR~
public void sort(int[] data) { {bj!]j
int[] temp=new int[data.length]; #<{v~sVp&
mergeSort(data,temp,0,data.length-1); oPe|Gfv\G
} x#1Fi$.
C6!F6Stn]g
private void mergeSort(int[] data, int[] temp, int l, int r) { 9`in r.:
int i, j, k; .#[ 9q-
int mid = (l + r) / 2; N} EKV
if (l == r) 0TU3 _;o
return; 57\ 0MQO
if ((mid - l) >= THRESHOLD) c=!>m
mergeSort(data, temp, l, mid); 9&+]YYCS-
else K<S3gb?0
insertSort(data, l, mid - l + 1); <BR^Dv07U
if ((r - mid) > THRESHOLD) .. `I<2
mergeSort(data, temp, mid + 1, r); #M-!/E
else SUS=sR/N
insertSort(data, mid + 1, r - mid); fG0?"x@>
gZ@+62
for (i = l; i <= mid; i++) { RGW@@
temp = data; 'I[?R&j$G
} fz'qB-F Y
for (j = 1; j <= r - mid; j++) { c(Q@5@1y:
temp[r - j + 1] = data[j + mid]; dCC*|b8h
} & 3#7>oQ
int a = temp[l]; I8xdE(o8+
int b = temp[r]; (t&RFzE?G
for (i = l, j = r, k = l; k <= r; k++) { dGKo!;7{
if (a < b) { AuNUW0/ 7
data[k] = temp[i++]; U]PB)
a = temp; !~#zd]0x;
} else { pH'_k k
data[k] = temp[j--]; ^<I(
b = temp[j]; >pq~ &)^u
} @16GF!.
} rN0<y4)!
} sJ6.3= c
8>KUx]AN
/** 1lw%RM
* @param data t"=5MaQk-
* @param l )+.=z
* @param i yRXML\Ge
*/ X%Ok ">
private void insertSort(int[] data, int start, int len) { Be6Yh~m
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); mU5Ox4>&9
} t.P@Ba^
} "\4W])30
} *EWWN?d
} "\|P6H
<4}m:
堆排序： Exb64n-_=
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package org.rut.util.algorithm.support; Gwd38
#p}GWS)
import org.rut.util.algorithm.SortUtil; K[[~G1Z
ee {ToK
/** +B*]RL[th
* @author treeroot kwjO5OC8
* @since 2006-2-2 ;(C<gt,r}
* @version 1.0 @*z"Hi>4
*/ 'D\X$^J^
public class HeapSort implements SortUtil.Sort{ ,s8/6n#
+_GS@)L`%
/* (non-Javadoc) 3^8Cc(bk
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4]o+)d.`(
*/ Y'U1=w~E
public void sort(int[] data) { nCQtn%j't
MaxHeap h=new MaxHeap(); =%<=Bn
h.init(data); hGtz[u#p
for(int i=0;i h.remove(); l5 9a3=q
System.arraycopy(h.queue,1,data,0,data.length); Pn,I^Ej.
} <KMCNCU\+
*b{IWOSe^
private static class MaxHeap{ \<{a=@_k9
aTcz5g0"
void init(int[] data){ 3FBLCD3
this.queue=new int[data.length+1]; !se1W5ke#
for(int i=0;i queue[++size]=data; *yBVZD|?H
fixUp(size); VbX P7bZ
} BA@E
} 56;u7
Oe5rRQ$O
private int size=0; $d<NN2
>@vu;j\*E5
private int[] queue; h/EIFve
EGXvz)y
public int get() { Sn nfU
return queue[1]; _3Eo{^
} u)@:V)z
$qD\ku;'
public void remove() { m23"xnRB
SortUtil.swap(queue,1,size--); [qc1 V%g
fixDown(1); ~F"S]
} j iKHx_9P
file://fixdown o/Ismg-p
private void fixDown(int k) { 8iIp[9~=
int j; \U:OQ.e
while ((j = k << 1) <= size) { g5y+F]'I
if (j < size %26amp;%26amp; queue[j] j++; Z^kE]Ir#EV
if (queue[k]>queue[j]) file://不用交换 A8-[EBkK
break; 8~Kq"wrbu
SortUtil.swap(queue,j,k); Ci`o;KVj
k = j; DNGyEC
} O#)1zD}
} AjK5x@\
private void fixUp(int k) { KA2>[x2
while (k > 1) { 8pnD6Lp>
int j = k >> 1; *w0!C:mL&
if (queue[j]>queue[k]) +[76_EXy
break; r#zcl)rbU
SortUtil.swap(queue,j,k); wAHuPQ&_Q
k = j; JSL&` `
} I=!kPuw
} @2E52$zu
"xlR>M6e
} |[`YGA4
w)7y{ya$
} ;W- A2g
2 7)IfE
SortUtil： 505c(+
mG~kf]Y
package org.rut.util.algorithm; "rBB&l
TAG@Ab
import org.rut.util.algorithm.support.BubbleSort; URb8[~dR:
import org.rut.util.algorithm.support.HeapSort; G_+/ e]P
import org.rut.util.algorithm.support.ImprovedMergeSort; B_[efM<R$
import org.rut.util.algorithm.support.ImprovedQuickSort; hO"!q;<eS
import org.rut.util.algorithm.support.InsertSort; pS$9mzY
import org.rut.util.algorithm.support.MergeSort; ,C,nNaW
import org.rut.util.algorithm.support.QuickSort; U'=8:&
import org.rut.util.algorithm.support.SelectionSort; h$8h@2%
import org.rut.util.algorithm.support.ShellSort; 6{6hz8
'V]C.`9c
/** (WHgB0{
* @author treeroot OlT8pG5Oa
* @since 2006-2-2 k'8tcXs
* @version 1.0 F\eQV<
*/ 8UU L=
public class SortUtil { lC($@sC%
public final static int INSERT = 1; >haihT
public final static int BUBBLE = 2; 9J/[7TzSZ
public final static int SELECTION = 3; YE`Y t
public final static int SHELL = 4; 7qqzL_d>
public final static int QUICK = 5; 8KJUC&`
public final static int IMPROVED_QUICK = 6; :i&]J$^;
public final static int MERGE = 7; ,7d/KJ^7
public final static int IMPROVED_MERGE = 8; F^GNOD3J
public final static int HEAP = 9; e]VW\6J&
c^I^jg2v
public static void sort(int[] data) { Bz/ba *
sort(data, IMPROVED_QUICK); 7(}'jZ
} Y"lEMY
private static String[] name={ r;{$x
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" rt^~ I\V
}; BL&AZv/T
Jg$<2CR&
private static Sort[] impl=new Sort[]{ LDQ,SS,
new InsertSort(), V/#Ra
new BubbleSort(), '8]p]#l
new SelectionSort(), a,w|r#x]
new ShellSort(), UOb`@#
new QuickSort(), ]@ruizb8
new ImprovedQuickSort(), 1^|#QMT
new MergeSort(), *v%y;^{k[/
new ImprovedMergeSort(), d.?}>jl
new HeapSort() #@oB2%&X?
}; *Z#OfB4}
x3i}IC
public static String toString(int algorithm){ lpXGsKH2
return name[algorithm-1]; hJ(vDv%
} Z[Tou
'Q=;I
public static void sort(int[] data, int algorithm) { uE.BB#
impl[algorithm-1].sort(data); _M%>Qm
} Z3&}C h
wp@_4Iq1$
public static interface Sort { (iq>]-=<
public void sort(int[] data); Xqw}O2QQ1
} ?9t4>xKn
u"&?u+1j
public static void swap(int[] data, int i, int j) { hEHd$tH06
int temp = data; pl).U#7`
data = data[j]; H^|TV]^;N
data[j] = temp; Ah1 9#0
} t#"0^$l=
} joI)6c