[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; Lfi6b%/z
} .Ja].hP
int i1=l; ^wWbW&<Tg
int i2=mid+1; ws9IO ?|&G
for(int cur=l;cur<=r;cur++){ /;(ji?wN
if(i1==mid+1) Ur]$@N
data[cur]=temp[i2++]; hT1JEu
else if(i2>r) 'I/_vqp@
data[cur]=temp[i1++]; MZ$uWm`/
else if(temp[i1] data[cur]=temp[i1++]; 5C1EdQ4S0
else Wgh@XB
data[cur]=temp[i2++]; WtZI1`\qe
} 1N(1h D
} 5z0VMt
G`n $A/9Q
} In_"iEo,
TyIjDG6tM
改进后的归并排序: Rs5lL-I
`K5*Fjx
package org.rut.util.algorithm.support; % Q6 za'25
tgG*k$8z
import org.rut.util.algorithm.SortUtil; m=l'9j"D
YyxU/UnhG
/** K [DpH&
* @author treeroot 2%fIe
* @since 2006-2-2 0c`zg7|
* @version 1.0 2H4vK]]Nl
*/ y& yf&p
public class ImprovedMergeSort implements SortUtil.Sort { RVV`
i:aW .QZ.
private static final int THRESHOLD = 10; "&k(lQ4
#PD6LO
/* lh'S_p8g
* (non-Javadoc) y8s!sO
* -JgNujt#9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) M]r?m@)
*/ NCkI[d]B@
public void sort(int[] data) { ISNL='%
int[] temp=new int[data.length]; GqRXNs!
mergeSort(data,temp,0,data.length-1); FiiDmhu
} GKo&?Tj)
=XR6rR8
private void mergeSort(int[] data, int[] temp, int l, int r) { \wA:58 -j
int i, j, k; 0pMN@Cz6
int mid = (l + r) / 2; ` 'Qb?F6
if (l == r) K2M=)B
return; =D$ED^W
if ((mid - l) >= THRESHOLD) D`WRy}o
mergeSort(data, temp, l, mid); 5_'lu
else {7goYzQsi%
insertSort(data, l, mid - l + 1); 4Wiy2
if ((r - mid) > THRESHOLD) <v0`r2^S{-
mergeSort(data, temp, mid + 1, r); RX>P-vp
else 0uDDaFS
insertSort(data, mid + 1, r - mid); #gV n7wq
I2*rtVAP'j
for (i = l; i <= mid; i++) { zw+aZDcV(
temp = data; >E+g.5 ,:W
} W#<1504ip
for (j = 1; j <= r - mid; j++) { 7m-%
temp[r - j + 1] = data[j + mid]; RJ3oI+gI
} pc*)^S
int a = temp[l]; /jGBQ-X
int b = temp[r]; @M"gEeI9
for (i = l, j = r, k = l; k <= r; k++) { )k,n}
if (a < b) { p@G7}'|eyA
data[k] = temp[i++]; nU_O|l9
a = temp; 5&n{QE?Um
} else { OtqFI!ns
data[k] = temp[j--]; {3`385
b = temp[j]; 4=tR_s
} 2; ^ME\
} Vbl-Ff
} Z#d#n!Lz
v~Q'm1!O4\
/** oa:YAqT
* @param data C")genMH
* @param l )cJ>&g4]
* @param i vt#;j;liG
*/ w95M B*N
private void insertSort(int[] data, int start, int len) { uMg\s\Z
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); d5m-f/
} k|)fl l
} tz@MZs09
} 1.!U{>$
} }9S}?R
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堆排序： H\S)a FY[
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package org.rut.util.algorithm.support; O{X~,Em=q
W r/-{Wt
import org.rut.util.algorithm.SortUtil; lv 8EfN
-)}s{[]d6m
/** sP(+Z^/
* @author treeroot Z[. M>|
* @since 2006-2-2 o&q>[c
* @version 1.0 B'}?cG]
*/ p)IL(_X)
public class HeapSort implements SortUtil.Sort{ y>a?<*Y+e
QadguV6|
/* (non-Javadoc) -G,}f\Cg
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) lxhb)]c ^>
*/ [%.v;+L
public void sort(int[] data) { 3gi)QCsk
MaxHeap h=new MaxHeap(); T0w_d_aS
h.init(data); lxL5Rit@Px
for(int i=0;i h.remove(); KG'i#(u[
System.arraycopy(h.queue,1,data,0,data.length); ]Btkoad
} *HKw;I
>aVgI<
private static class MaxHeap{ ]b4IO4T
$,4h\>1WP
void init(int[] data){ WkTJ M
this.queue=new int[data.length+1]; GI%&.Vd
for(int i=0;i queue[++size]=data; F_ F"3'[
fixUp(size); cszvt2BIg
} Vx_33";S\
} _M^.4H2
5WQl?yMP
private int size=0; %T/@/,7h
K!-OUm5A
private int[] queue; X$Vi=fvt
fW-C`x
public int get() { mOE *[S)
return queue[1]; 3"y 6|e/5
} ! xCo{U=
z]G|)16
public void remove() { s*izhjjX
SortUtil.swap(queue,1,size--); 0*$w(*
fixDown(1); ?%s>a8w
} @?3f`l 9
file://fixdown LIZB!S@V\
private void fixDown(int k) { 3 t,_{9
int j; ^dQ{vL@9b9
while ((j = k << 1) <= size) { REUxXaN>Z
if (j < size %26amp;%26amp; queue[j] j++; )%7P?^>
if (queue[k]>queue[j]) file://不用交换 /'/I^ab
break; qyH-Z@
SortUtil.swap(queue,j,k); h|qJ{tUWc$
k = j; "D(Lp*3hj&
} `R[Hxi
} }E 'r?N
private void fixUp(int k) { _Iy\,<
while (k > 1) { Aedf (L7\
int j = k >> 1; xVm-4gB
if (queue[j]>queue[k]) _;1{feR_
break; d?2V2`6
SortUtil.swap(queue,j,k); Y %JQ
k = j; V'vR(Wx
} "z~ba>,-\
} ux;?WPyr
[^5\Ww
} ks4`h>i
V0nQmsP1U
} $T'!??|IF
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SortUtil： 7GgZ: $d
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package org.rut.util.algorithm; '/W$9jm
8|a./%gixs
import org.rut.util.algorithm.support.BubbleSort; )[Y B&
import org.rut.util.algorithm.support.HeapSort; mayJwBfU
import org.rut.util.algorithm.support.ImprovedMergeSort; lE:g A,
import org.rut.util.algorithm.support.ImprovedQuickSort; #oUNF0L@6
import org.rut.util.algorithm.support.InsertSort; VeoG[Jl
import org.rut.util.algorithm.support.MergeSort; zCx4DN`
import org.rut.util.algorithm.support.QuickSort; 4<efj
import org.rut.util.algorithm.support.SelectionSort; `Fy-"Uf
import org.rut.util.algorithm.support.ShellSort; (j: ptQ2$
V>{< pS
/** t[^$F,
* @author treeroot ~3&{`9Y
* @since 2006-2-2 9j,g&G.K
* @version 1.0 yYG<tUG;
*/ Jup)m/
public class SortUtil { tq3Wga!5
public final static int INSERT = 1; }r,\0Wm
public final static int BUBBLE = 2; E[H
public final static int SELECTION = 3; FKa";f"
public final static int SHELL = 4; X\|!
public final static int QUICK = 5; Tg\bpLk0=
public final static int IMPROVED_QUICK = 6; k:@DK9 "^
public final static int MERGE = 7; ]\$/:f-2
public final static int IMPROVED_MERGE = 8; +#W94s~0V
public final static int HEAP = 9; (Fv tL*
"W|A^@r}
public static void sort(int[] data) { wVf~FssN
sort(data, IMPROVED_QUICK); d$dy6{/YD
} sibYJKOy
private static String[] name={ ]-fkmnmWX
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" :GHv3hn5
}; m>>.N?
JAPr[O&
private static Sort[] impl=new Sort[]{ _VtQMg|u
new InsertSort(), {zdMmpQF
new BubbleSort(), *H>rvE.K?
new SelectionSort(), u;#]eUk9}
new ShellSort(), !rvEo =^
new QuickSort(), ~wc:/UM|
new ImprovedQuickSort(), uV/5f#)
new MergeSort(), JxAQ,oOO
new ImprovedMergeSort(), qWt}8_"
new HeapSort() -yYdj1y;
}; N;7/C
#(8|9
public static String toString(int algorithm){ qUe _B
return name[algorithm-1]; pSZ2>^";
} 6cQgp]%
1>!LK_
public static void sort(int[] data, int algorithm) { gq?:n.;TY
impl[algorithm-1].sort(data); +6m.f,14q
} d0cL9&~qW
Qzi?%&
public static interface Sort { Szus*YL7
public void sort(int[] data); /7Q|D sa
} @ZKf3,J0
W U(_N*a
public static void swap(int[] data, int i, int j) { E8Dh;j
int temp = data; yU?jmJ
data = data[j]; 1H)mJVIKkB
data[j] = temp; ~Bd=]a$mj
} $o^Z$VmL
} JzHG5nmB