[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; DB?[h<^m
} $H5Xa[
int i1=l; HC$_p,9OV
int i2=mid+1; /+3|tb
for(int cur=l;cur<=r;cur++){ 8I@_X~R
if(i1==mid+1) (+9@j(
data[cur]=temp[i2++]; {gJOc,U4b
else if(i2>r) ;Yi ;2ttW
data[cur]=temp[i1++]; 8(ZQD+U(9F
else if(temp[i1] data[cur]=temp[i1++]; bd%/dr
else z/;NoQ-
data[cur]=temp[i2++]; M T{^=F ]
} b|4h2iuM
} H1q>UU:
AN^;~m^
} K}Aaflq
(=7e~'DC
改进后的归并排序: ZZ4W?);;
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package org.rut.util.algorithm.support; ^d!-IL_
bZ0r/f,n$
import org.rut.util.algorithm.SortUtil; }J:~}?^%n
.lqo>Ta y
/** 96 C|R
* @author treeroot n#m )]YQC
* @since 2006-2-2 2p@S-Lp
* @version 1.0 hv9s
*/ E4WoKuE1$
public class ImprovedMergeSort implements SortUtil.Sort { lS}5bcjR=k
UP#]n 69y
private static final int THRESHOLD = 10; {N>VK*
R_(A&,
/* PF4Cs3m/
* (non-Javadoc) }"_S;[{d
* %vMi kibI
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) YsLEbue
*/ B<+}_3.
public void sort(int[] data) { IUI>/87u
int[] temp=new int[data.length]; _e/vw:
mergeSort(data,temp,0,data.length-1); m,Os$>{Ok
} .(3B}}gB>
wxF9lZz
private void mergeSort(int[] data, int[] temp, int l, int r) { Rh~<#"G]
int i, j, k; w!tQU9+*
int mid = (l + r) / 2; ZSHc@r*>
if (l == r) 17J|g.]m-&
return; o^gqpQv
if ((mid - l) >= THRESHOLD) yl)}1DPP
mergeSort(data, temp, l, mid); ~,dj)x 3M
else 670g|&v.
insertSort(data, l, mid - l + 1); Pgb<;c:4
if ((r - mid) > THRESHOLD) 1P&c:n
mergeSort(data, temp, mid + 1, r); R$NH [Tz
else WCU[]A
insertSort(data, mid + 1, r - mid); z]~B@9l
YpXUYNy
for (i = l; i <= mid; i++) { w0VJt<e*
temp = data; Gv3a<Knn4
} ~[l2"@
for (j = 1; j <= r - mid; j++) { G^oBu^bq~
temp[r - j + 1] = data[j + mid]; BpRQG]L
} 389T6sP]
int a = temp[l]; &yWl8O
int b = temp[r]; X+Xjf(
for (i = l, j = r, k = l; k <= r; k++) { 91`biVZfA
if (a < b) { G+=&\+{#4
data[k] = temp[i++]; 8la.N*
a = temp; #;>J<>
} else { uB0/H=<H
data[k] = temp[j--]; y~''r%]
b = temp[j]; Q:lSKf
} Lab{?!E>U
} 8qo{%
} /6b(w=pk
JYs*1<
/** 8gr&{-5
* @param data Nmns3D
* @param l }8 fG+H.
* @param i lB.P
*/ U*1rA/"n
private void insertSort(int[] data, int start, int len) { U3az\E)HV
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 8Q?)L4.]
} p%_r0
} (\>_{"*=
} 0}-&v+
} zZGPA j
@\b*a]CV
堆排序： !uy?]l
M"ZP s
package org.rut.util.algorithm.support; 9kWyO:a_(
yUqvF6+26
import org.rut.util.algorithm.SortUtil; >J|I
{b8!YbG
/** q^>$YY>F
* @author treeroot |s[m;Qm[ku
* @since 2006-2-2 p~DlZk"
* @version 1.0 '&'? S
*/ ;F"W6G
public class HeapSort implements SortUtil.Sort{ 'P39^rb
tbl!{Qwx
/* (non-Javadoc) CSR6
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /%=p-By<V
*/ Y)?4OB=n
public void sort(int[] data) { {>pB
MaxHeap h=new MaxHeap(); {.DI[@.g
h.init(data); &X9#{:l=
for(int i=0;i h.remove(); [P`Q_L,+
System.arraycopy(h.queue,1,data,0,data.length); Yk6fr~b
} 's(0>i
<~<I K=n
private static class MaxHeap{ aG?'F`UQ
0&$e:O'v
void init(int[] data){ b8feo'4Z
this.queue=new int[data.length+1]; #AFr@n
for(int i=0;i queue[++size]=data; G]=U=9ZI
fixUp(size); ]nEN3RJ
} rKP"|+^
} 9v_gR52vh
x.<^L] "
private int size=0; 0[x?Q[~S_0
#sq-V,8
private int[] queue; #<MLW4P
w(<; $9
public int get() { VgN`' iC`I
return queue[1]; /Vg R[
} UW. F1)
qd%5[A
public void remove() { JOx75}
SortUtil.swap(queue,1,size--); ^Qs-@]E-
fixDown(1); s"=e(ob
} \b1I<4(
file://fixdown ;yx+BaG~?
private void fixDown(int k) { 4Q,HhqV'
int j; -~p@o1k0
while ((j = k << 1) <= size) { iEsI
if (j < size %26amp;%26amp; queue[j] j++; 8n,i5>!d
if (queue[k]>queue[j]) file://不用交换 Z"mpE+U*
break; /1gKc}rB2
SortUtil.swap(queue,j,k); 7=6p
k = j; ec)G~?FH
} I,l%6oPa
} ^{zwIH2I]
private void fixUp(int k) { iShB^
while (k > 1) { =uYSZR
int j = k >> 1; 6jO*rseC
if (queue[j]>queue[k]) iePpJ>(
break; eWhv X9 <
SortUtil.swap(queue,j,k); {Ejv8UdA9
k = j; !3-mPG< ]
} POtDge
} Z=L' [6
/e!/
} UFyGp>/06
R5H UgI
} v}M, M&?
'.#KkvE##
SortUtil： aGr(djD
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package org.rut.util.algorithm; T=ox;r
nsaf6y&E
import org.rut.util.algorithm.support.BubbleSort; q(\$-Dk.Vv
import org.rut.util.algorithm.support.HeapSort; k&n7_[]n
import org.rut.util.algorithm.support.ImprovedMergeSort; '_4u, \SG
import org.rut.util.algorithm.support.ImprovedQuickSort; !,V8?3.aJn
import org.rut.util.algorithm.support.InsertSort; v7\~OOoH]
import org.rut.util.algorithm.support.MergeSort; *J 7>6N:-
import org.rut.util.algorithm.support.QuickSort; Ni(D[?mZ
import org.rut.util.algorithm.support.SelectionSort; K}1>n2P
import org.rut.util.algorithm.support.ShellSort; tPDV"Md#m<
'lHtz~[
/** svU107?
* @author treeroot Fu^^Jex
* @since 2006-2-2 aEy_H-6f
* @version 1.0 ]zhFFq`
*/ ^pKC0E[%
public class SortUtil { $lU~3I)
public final static int INSERT = 1; qV@xEgW#r
public final static int BUBBLE = 2; F'C]OMBE
public final static int SELECTION = 3; +G7A.d`V}
public final static int SHELL = 4; j &)|nK;}
public final static int QUICK = 5; mucY+k1>g
public final static int IMPROVED_QUICK = 6; Z@t).$
public final static int MERGE = 7; }u5 Mexs
public final static int IMPROVED_MERGE = 8; z,P:i$
public final static int HEAP = 9; ZBJ.dK?Ky|
[A yq%MA
public static void sort(int[] data) { P=KOw;bs
sort(data, IMPROVED_QUICK); L_<&oq
} ]Q6,,/nn
private static String[] name={ Q5Y4@
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" k#5S'sCF<
}; Rdwr?:y(]
[j1SX-NX
private static Sort[] impl=new Sort[]{ 7`~h'(k
new InsertSort(), KG4~t=J`
new BubbleSort(), ;k (}~_
new SelectionSort(), t1n'Ecm(
new ShellSort(), $B2* x$
new QuickSort(), -XPGl
new ImprovedQuickSort(), o5BOe1_Pw
new MergeSort(), ~.VWrHC
new ImprovedMergeSort(), &.K8cphj
new HeapSort() jO3Q@N0_
}; 8ftLYMX@
rQ30)5^V|
public static String toString(int algorithm){ ,HUs MCXQ
return name[algorithm-1]; b3#c0GL
} p!hewtb5
1[} =,uaM
public static void sort(int[] data, int algorithm) { nO\|43W
impl[algorithm-1].sort(data); DS=kSkW^&5
} ~ Y4H)r
Mff_j0D
public static interface Sort { E@0wt^
public void sort(int[] data); A}t.`FLP,j
} FK }x*d
wZE[we^Q"
public static void swap(int[] data, int i, int j) { RLw=y{%p
int temp = data; D<5gdIw
data = data[j]; \X Nb9-
data[j] = temp; '/z.\S
} wrK$ZO]
} O<L/m[]