[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; * xdS<
} 3<LG~HWST
int i1=l; IT5AB?bxH
int i2=mid+1; 6?b9~xRW
for(int cur=l;cur<=r;cur++){ qcEiJ}-
if(i1==mid+1) Y0:y72mK
data[cur]=temp[i2++]; g^OU+7o
else if(i2>r) 8aQ\Yx
data[cur]=temp[i1++]; B<i)je!
else if(temp[i1] data[cur]=temp[i1++]; F2WUG
else )T/"QF}<T
data[cur]=temp[i2++]; R,-y
} 9!zUv:;
} =PWh,lWS
Z;M]^?
} :j)H;@[I
S^? @vj
改进后的归并排序: jFf2( AR
( >zXapb2
package org.rut.util.algorithm.support; qMD6LWJ
*T' /5,rX2
import org.rut.util.algorithm.SortUtil; u1s^AW8 y
kFZw"5hb
/** PXof-W
* @author treeroot 12n5{'H2%
* @since 2006-2-2 J;,6ydf8!
* @version 1.0 DksSD
*/ Y4e64`V)
public class ImprovedMergeSort implements SortUtil.Sort { h?5$-#q~
KoZ" yD
private static final int THRESHOLD = 10; h<U<KO
S'#KPzy.
/* fz#e4+oH
* (non-Javadoc) R h zf.kp
* Y0fX\6=h
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0l#gS;
*/ kKFmTo
public void sort(int[] data) { (NK$2A/p
int[] temp=new int[data.length]; QNj hA'[T
mergeSort(data,temp,0,data.length-1); KoVy,@
} ]BGWJA5
0(\ybppx
private void mergeSort(int[] data, int[] temp, int l, int r) { S^'?sfq
int i, j, k; (dn(:<_$
int mid = (l + r) / 2; -L>xVF-|:1
if (l == r) hn\<'|n
return; pv*u[ffi
if ((mid - l) >= THRESHOLD) o?@,f/"5
mergeSort(data, temp, l, mid); 6<jh0=$
else 4^vEMq8lB
insertSort(data, l, mid - l + 1); U\'.rT[#
if ((r - mid) > THRESHOLD) roT$dL P)w
mergeSort(data, temp, mid + 1, r); a<9gD,]P
else Q= IA|rN
insertSort(data, mid + 1, r - mid); G&$+8r
]o`qI#{R~R
for (i = l; i <= mid; i++) { ~&B{"d
temp = data; CKwrE]h
} HEHTj,T
for (j = 1; j <= r - mid; j++) { IH8^ fyQ`
temp[r - j + 1] = data[j + mid]; M7!>-P
} %>B?WR\yE
int a = temp[l]; Hf!o6 o
int b = temp[r]; Hv2t_QjKT
for (i = l, j = r, k = l; k <= r; k++) { T^.;yU_B?
if (a < b) { Lsa&A+fru
data[k] = temp[i++]; +InAK>NZ'
a = temp; x LR 2H>B}
} else { }PdS?[R
data[k] = temp[j--]; 7wS)'zR;
b = temp[j]; +M-x*;.
} 0Ou;MU*v
} H1X38
} K0$8t%Z.
; mnV)8:F
/** Q`k=VSUk
* @param data ep`WYR|B
* @param l tj/X7|
* @param i rUvjc4O}
*/ _1jd{?kt
private void insertSort(int[] data, int start, int len) { `(s&H8x#
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); P @N7g`u3}
} >MD['=J[d
} 6U[`CGL66
} t=M:L[bis;
} C5oslP/@
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堆排序： R&}"En`$s
F|p&v7T
package org.rut.util.algorithm.support; )N h67P3X"
({JXv
import org.rut.util.algorithm.SortUtil; eaLSq
H0<(j(JK
/** |>o]+V
* @author treeroot Tbv", b
* @since 2006-2-2 >PdYQDyVS
* @version 1.0 >xQgCOi
*/ X+zFRL%
public class HeapSort implements SortUtil.Sort{ tSX<^VER7
% C~2k?
/* (non-Javadoc) ~ED8]*H|`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;|_aACina
*/ 0G`_dMN
public void sort(int[] data) { Y"~Tf{8
MaxHeap h=new MaxHeap(); j9"uxw@
h.init(data); e0iE6:i
for(int i=0;i h.remove(); ( HCB\!g
System.arraycopy(h.queue,1,data,0,data.length); wGdnv}#
} {(;dHF%{
mLApF5Hy
private static class MaxHeap{ LVNq@,s
wG;#L7%
void init(int[] data){ H]&a}WQ_
this.queue=new int[data.length+1]; &4 Py
for(int i=0;i queue[++size]=data; / blVm1F
fixUp(size); YjaEKM8*
} (B|4wR\
} 4CA(` _i~
Yd]y`J?#
private int size=0; hTgWqp
PwP;+R};|
private int[] queue; :pj00
I&JVY8'
public int get() { Cm@e^l!
return queue[1]; DM {r<?V
} sf{rs*bgp
NA%M)u{|
public void remove() { l&3f<e
SortUtil.swap(queue,1,size--); NIZN}DnP
fixDown(1); %Jy0?WN
} ]WlE9z7:8
file://fixdown ~2 L{m[s|
private void fixDown(int k) { `4^-@}
int j; J2A+x\{<
while ((j = k << 1) <= size) { _<tWy+.
if (j < size %26amp;%26amp; queue[j] j++; :|cC7,S
if (queue[k]>queue[j]) file://不用交换 X(sHFVU+
break; irj{Or^k
SortUtil.swap(queue,j,k); g/Q"%GN,
k = j; 5(BB`)
} _,*ld#'s
} 1k-YeQNe
private void fixUp(int k) { ?,GCR1|4
while (k > 1) { h'*>\eC6
int j = k >> 1; c@H_f
if (queue[j]>queue[k]) ;',hwo_LBf
break; 7{<:g!
SortUtil.swap(queue,j,k); cp D=9k!*K
k = j; 0($@9k4!/
} \@G 7Kk*l
} X!=E1TL
_dQVundH
} mocR_3=Q?
CjtBQ5
} <dzfD;
kU uDA><1
SortUtil： F3BWi[Xh
Ik{[BRzUgt
package org.rut.util.algorithm; @tv3\eD
poJ7q (
import org.rut.util.algorithm.support.BubbleSort; Bw5zh1ALC;
import org.rut.util.algorithm.support.HeapSort; n-X;JYQW
import org.rut.util.algorithm.support.ImprovedMergeSort; [C1.*Q+l
import org.rut.util.algorithm.support.ImprovedQuickSort; 50MdZ;R-3
import org.rut.util.algorithm.support.InsertSort; z1wJ-l
import org.rut.util.algorithm.support.MergeSort; QuG=am?l`
import org.rut.util.algorithm.support.QuickSort; 5/U|oZM"
import org.rut.util.algorithm.support.SelectionSort; {NmpTb
import org.rut.util.algorithm.support.ShellSort; uZ[7[mK}n7
8?p40x$m%
/** "S8JHHx
* @author treeroot k^A17Nf`2
* @since 2006-2-2 6T3uv,2
* @version 1.0 gz{~\0y
*/ | %E\?-TK
public class SortUtil { -1\*}m%1e
public final static int INSERT = 1; : ?K}.Kb
public final static int BUBBLE = 2; S"t6 *fWr
public final static int SELECTION = 3; ryhme\%l;f
public final static int SHELL = 4; ;%-f>'KhI7
public final static int QUICK = 5; }^T7S2_Qy
public final static int IMPROVED_QUICK = 6; Zp5;=8wa;
public final static int MERGE = 7; eN*=wOh
public final static int IMPROVED_MERGE = 8; NBLiwL37{
public final static int HEAP = 9; W lDcKY
sZ~q|}D-
public static void sort(int[] data) { LW+a-i
sort(data, IMPROVED_QUICK); RM^3Snd=V
} H{XbKLU
private static String[] name={ E0F8FR'
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" P''5A6#5
}; :.;pRz
4<`Qyul-
private static Sort[] impl=new Sort[]{ t(<^of:
new InsertSort(), K})=&<M0
new BubbleSort(), )SkJgzvC
new SelectionSort(), uJBs3X
new ShellSort(), ;rBd_
new QuickSort(), a/})X[2
new ImprovedQuickSort(), *,C[yg1P
new MergeSort(), rL{3O4O
new ImprovedMergeSort(), >Yr-aDV
new HeapSort() @UbH;m
}; z ^e99dz
`2}Frw+?
public static String toString(int algorithm){ fW/G_
return name[algorithm-1]; :0G_n\
} u\L=nCtLby
4!%@{H`3
public static void sort(int[] data, int algorithm) { yr4j
impl[algorithm-1].sort(data); =bn(9Gm!J
} .9":Ljs(L
6Z5X?B
public static interface Sort { Ino$N|G[
public void sort(int[] data); ^,P# <,D,
} ->BGeP_=|
Y|'0bujr
public static void swap(int[] data, int i, int j) { X#625h
int temp = data; 7(ni_|$|
data = data[j]; [w0@7p"7
data[j] = temp; ,r=9$i_
} U8f!yXF'
} +XaRwcLC.