[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; z++*,2F
} 8 ]dhNA5
int i1=l; &y mfA{s
int i2=mid+1; t}qoIxy)
for(int cur=l;cur<=r;cur++){ %xyt4}-)m
if(i1==mid+1) aoco'BR F
data[cur]=temp[i2++]; 45edyQ
else if(i2>r) |`U^+Nf
data[cur]=temp[i1++]; st|$Fu
else if(temp[i1] data[cur]=temp[i1++]; [}9R9G>"
else u\ytiGO*
data[cur]=temp[i2++]; _|wgw^.LJ]
} JQ%e'
} V(=~p[
-/B}XNW
} 6BFtY+.y
Mm:6+
改进后的归并排序: un6grvxr
C"<l}
package org.rut.util.algorithm.support; }7g\1l\
I`t"Na2i
import org.rut.util.algorithm.SortUtil; ]3NH[&+
`U#*O+S-^
/** PGP9-M
* @author treeroot e8a_)TU?
* @since 2006-2-2 xFHc+m' m~
* @version 1.0 P_z3TK
*/ 1V+a;-?
public class ImprovedMergeSort implements SortUtil.Sort { +AtZltM i
IW Lv$bPZ/
private static final int THRESHOLD = 10; f&js,NU"
1G=1FGvP
/* sn+i[
* (non-Javadoc) {uL<$;#i
* :7e2O!zH_
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ya5;C"
*/ {|^9y]VFu
public void sort(int[] data) { x5WFPY$wM
int[] temp=new int[data.length]; I6M 7xn
mergeSort(data,temp,0,data.length-1); Z$k4T$,[-
} ?M;2H{KG:
UVUbxFq:
private void mergeSort(int[] data, int[] temp, int l, int r) { !Jh-v
int i, j, k; G>M# BuU
int mid = (l + r) / 2; Vu*yEF}
if (l == r) &AU%3b
return; bguhx3s
if ((mid - l) >= THRESHOLD) B$ +YK%I
mergeSort(data, temp, l, mid); a,#f%#J\
else I$n 0aR6
insertSort(data, l, mid - l + 1); ..Zuy|?w
if ((r - mid) > THRESHOLD) 5:hajXd
mergeSort(data, temp, mid + 1, r); aM9^V MOb
else 9FP6Z[4
insertSort(data, mid + 1, r - mid); '6Ybf
Ss@\'K3e
for (i = l; i <= mid; i++) { NC>rZS]
temp = data; X<x"\Yk
} @r%[e1.
for (j = 1; j <= r - mid; j++) { ;? '`XB!
temp[r - j + 1] = data[j + mid]; %q;3bfq@N
} 8%_XJyg
int a = temp[l]; [kt!\-
int b = temp[r]; hW~,Uqy
for (i = l, j = r, k = l; k <= r; k++) { Cj _Q9/
if (a < b) { \'q-Xr'}M
data[k] = temp[i++]; *%:p01&+
a = temp; YKJk)%;+w
} else { <dV|N$WV
data[k] = temp[j--]; d0Py[37V
b = temp[j]; 2L[/.|
} ~Hd{+0
} k v,'9z
} `ihlKFX
`pn]jpW9
/** TKx.`Cf m
* @param data U-QK
* @param l O/e5LA
* @param i L Bb&av
*/ Cl7IP<.
private void insertSort(int[] data, int start, int len) { 8+k\0fmy
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); !l?Go<^*L
} (Q o
} [D[s^<RJs
} 4rO07)~l
} >DBaKLu\
RgHPYf{
堆排序： 9.m_3"s
~%qHJ4C
package org.rut.util.algorithm.support; _"&b%!
azr|Fz/
import org.rut.util.algorithm.SortUtil; -N<s =
ax[-907
/** T6=c9f?7
* @author treeroot RI!!?hYm
* @since 2006-2-2 cWl
* @version 1.0 B# |w}hj
*/ LcoJltY{5
public class HeapSort implements SortUtil.Sort{ t.t$6+"5We
|g;hXr#~
/* (non-Javadoc) 4'Z=T\:
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .2q7X{4=
*/ j5Vyo>
public void sort(int[] data) { :7KcD\fCj
MaxHeap h=new MaxHeap(); %`F6>J
h.init(data); ()6(eRGJ
for(int i=0;i h.remove(); b6RuYwHWV0
System.arraycopy(h.queue,1,data,0,data.length); {VE\}zKF
} #~^#%G
1&ukKy,[
private static class MaxHeap{ g>12!2}
JfxD-9U^>u
void init(int[] data){ Jt\?,~,
this.queue=new int[data.length+1]; &p8b4y_
for(int i=0;i queue[++size]=data; -M2c8P:.b
fixUp(size); <.HX_z3l
} m=jxTZK
} )[|TxXz d
kl4FVZof
private int size=0; @]uvpI!h
jAB~XaT,
private int[] queue; -Ob'/d5&
i^eU!^KF
public int get() { z|^:1ov,
return queue[1]; 3,DUT{2
} \HF|&@}hU
KhIg
public void remove() { F.i*'x0u
SortUtil.swap(queue,1,size--); ^#B`GV
fixDown(1); KC9_H>
} 2a'b}<|[(
file://fixdown 5MfbO3
private void fixDown(int k) { 5,cq-`
int j; y!&6"l$K]
while ((j = k << 1) <= size) { .aV#W@iyK
if (j < size %26amp;%26amp; queue[j] j++; qF C0$:z&
if (queue[k]>queue[j]) file://不用交换 xok8
break; m^Qc9s#D
SortUtil.swap(queue,j,k); M>nplHq
k = j; tGDsZ;3Yr
} LG0+A}E=C
} a'u:1C^\
private void fixUp(int k) { C ?JcCD2
while (k > 1) { XZde}zUWn
int j = k >> 1; piIj t
if (queue[j]>queue[k]) VRQ'sn@
break; [0<N[KZ)
SortUtil.swap(queue,j,k); T}d%XMXq
k = j; P&@ 2DI3m
} i}"Eu< P
} 1O3"W;SR<:
_;/onM
} LI1OocY.]
i eQQ{iGJH
} _Cn[|E
J:LwO
SortUtil： Mhp6,JL
3]"RaI4Q0
package org.rut.util.algorithm; V<:scLm#OF
wXI6KN-
import org.rut.util.algorithm.support.BubbleSort; +NWhvs
import org.rut.util.algorithm.support.HeapSort; '0|0rwx
import org.rut.util.algorithm.support.ImprovedMergeSort; xo3bY6<n
import org.rut.util.algorithm.support.ImprovedQuickSort; V_+XZ+7Lx}
import org.rut.util.algorithm.support.InsertSort; }GI8p* ]o=
import org.rut.util.algorithm.support.MergeSort; -7{qTe{
import org.rut.util.algorithm.support.QuickSort; KnK8\p88\
import org.rut.util.algorithm.support.SelectionSort; kEiWE|
import org.rut.util.algorithm.support.ShellSort; 50h?#u6?
F7[ 55RcP
/** EAafi<n
* @author treeroot _=l8e-6r
* @since 2006-2-2 3"afrA
* @version 1.0 d h5%
*/ 1 ? be
public class SortUtil { sg0HYb%_E
public final static int INSERT = 1; W Cz+
public final static int BUBBLE = 2; ip.aM#
public final static int SELECTION = 3; bit@Kv1<C
public final static int SHELL = 4; Tk1U
public final static int QUICK = 5; 'PiQ|Nnb|
public final static int IMPROVED_QUICK = 6; bDK%vx!_
public final static int MERGE = 7; 4'EC(NR7N
public final static int IMPROVED_MERGE = 8; kq+`.
public final static int HEAP = 9; 2smQD8t
k6.<zs0
public static void sort(int[] data) { BO]}E:C9
sort(data, IMPROVED_QUICK); e+416 ~X v
} X'[93 C|K
private static String[] name={ sX_6qKUH
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" a(cZ]`s]*
}; JSO'. [N
Ujb7uho
private static Sort[] impl=new Sort[]{ luLt~A3H$
new InsertSort(), Ew.a*[W''
new BubbleSort(), DVC<P}/
new SelectionSort(), 8/4i7oOC
new ShellSort(), i_<Uk8
new QuickSort(), R/5@*mv{
new ImprovedQuickSort(), P:Nj;Cxh
new MergeSort(), lHl1Ny\?
new ImprovedMergeSort(), J+IkTqw
new HeapSort() @ootKY`
}; ]&;M78^6
\M(#FS
public static String toString(int algorithm){ Q--Hf$D]H
return name[algorithm-1]; )GgO=J:o
} .MUoNk!
..u2IdEu
public static void sort(int[] data, int algorithm) { gFBMARxi
impl[algorithm-1].sort(data); )o51QgPy
} #21t8
3/d`s0O
public static interface Sort { $K-od3h4=
public void sort(int[] data); r*Iu6
} g+ZQ6Hz
4\Nt"#U)g
public static void swap(int[] data, int i, int j) { h4N%(?7
int temp = data; Pgdv)i3
data = data[j]; BZUA/;Hz &
data[j] = temp; ~r%>x
} $)(K7> P
} ItLP&S=