[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; 4J-)+C/edx
} K^s!0[6
int i1=l; ']A+wGR&r
int i2=mid+1; }&`#
for(int cur=l;cur<=r;cur++){ {$O.@#'
if(i1==mid+1) 3EF|1B/5
data[cur]=temp[i2++]; /`}C~
else if(i2>r) M,q'
data[cur]=temp[i1++]; }|{yd03+
else if(temp[i1] data[cur]=temp[i1++]; Uhb6{'+
else Z"% =
data[cur]=temp[i2++]; s 6vsV
} KuE 2a,E4
} "fr B5[
VA4_>6
} H:y.7
?<xGO@b .
改进后的归并排序: L;E9"7Jo
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package org.rut.util.algorithm.support; Bb8lklQ
p24sWDf
import org.rut.util.algorithm.SortUtil; b!<?,S
m0XK?;\V
/** B.Ic8'
* @author treeroot c,X\1yLy
* @since 2006-2-2 `m@06Q
* @version 1.0 yhgHwES"
*/ ~\:+y
public class ImprovedMergeSort implements SortUtil.Sort { HrEZ]iQ@O0
hY/SR'8
private static final int THRESHOLD = 10; 7PHvsd"]p
2syKYHV
/* Ny p5=
* (non-Javadoc) ;:8_H0X'K
* 'hf-)\Ylf
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) yi r#G""7
*/ r3_@ L>;
public void sort(int[] data) { lNls8@
int[] temp=new int[data.length]; L?4c8!Q
mergeSort(data,temp,0,data.length-1); _"##p
} gWv/3hWWB
}qi6K-,oU
private void mergeSort(int[] data, int[] temp, int l, int r) { >77 /e@
int i, j, k; u23^* -
int mid = (l + r) / 2; 6>SP5|GG
if (l == r) lmQ!q>N
return; VG q'
if ((mid - l) >= THRESHOLD) y<8)mw
mergeSort(data, temp, l, mid); R%8nR6iG"
else 9I+;waLlB
insertSort(data, l, mid - l + 1); -:*PXu
if ((r - mid) > THRESHOLD) i1\xZ<|0
mergeSort(data, temp, mid + 1, r); |Tf}8e
else Yf7n0Etd,
insertSort(data, mid + 1, r - mid); =36vsps=
| z$ba:u5
for (i = l; i <= mid; i++) { 9%>H}7=
temp = data; &}YB!6k h^
} 6./h0kD`
for (j = 1; j <= r - mid; j++) { ShF ][v1L
temp[r - j + 1] = data[j + mid]; vA;ml$
} !ck=\3pr
int a = temp[l]; Y}(v[QGV
int b = temp[r]; 6V*@ {
for (i = l, j = r, k = l; k <= r; k++) { 4US8B=jk
if (a < b) { V0c*M>V
data[k] = temp[i++]; 3)EslBA7i
a = temp; &CCB;Oi%
} else { CNM/}|N^Si
data[k] = temp[j--]; T{{J' _s5L
b = temp[j]; }i|o":-x+
} H.v`JNs(
} Cdotl$'
} _ZC4O&fL
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/** ?b^VEp.;}
* @param data t`Mm
* @param l TB*g$*
* @param i 1CFrV=d
*/ toX4kmC
private void insertSort(int[] data, int start, int len) { l/DV ?27
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); s7D_fv4e
} 0F0V JE
} 8Rc4+g
} FWq6e,
} iG6 ^s62z7
DTlM}
堆排序： }8fxCW*|
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package org.rut.util.algorithm.support; `IFt;Ja\6
v}+axu/?
import org.rut.util.algorithm.SortUtil; ](x4q
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/** R^f~aLl
* @author treeroot nwOr
* @since 2006-2-2 <E&1HeP
* @version 1.0 Iwize,J~X
*/ 9K Ih}Q@P
public class HeapSort implements SortUtil.Sort{ pvDr&n9
HJ !)D~M{
/* (non-Javadoc) zVGjXuNa
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 42Tjbten_u
*/ zi:GvTG
public void sort(int[] data) { /49PF:$?
MaxHeap h=new MaxHeap(); r*0a43mC1
h.init(data); U@ALo
for(int i=0;i h.remove(); `(_cR@\
System.arraycopy(h.queue,1,data,0,data.length); &:S_ewJK7
} N+"Y@X yg
"5synfO
private static class MaxHeap{ {5#P1jlT
F,11 \j
void init(int[] data){ tURIDj%#p
this.queue=new int[data.length+1]; (X)$8y
for(int i=0;i queue[++size]=data; 9bMM-~
fixUp(size); !|9$
} (W5E\hjJ
} 5#80`/w^U
jMzHs*:
private int size=0; qaA\.h7
ig")bt3s5
private int[] queue; })M$#%(
|n}W^}S5
public int get() { !_?<-f(
return queue[1]; $P866F
} 7B"J x^
0`h[|FYV
public void remove() { KQJn\#>
SortUtil.swap(queue,1,size--); h$f/NSct2
fixDown(1); nxsQDw\hy
} SV<*qz
file://fixdown >tr_Ypfv,c
private void fixDown(int k) { ;}A#ws_CD_
int j; CbQ@l@d]
while ((j = k << 1) <= size) { PUltn}M
if (j < size %26amp;%26amp; queue[j] j++; eG"iJ%I
if (queue[k]>queue[j]) file://不用交换 8!VjXj"
break; s|pb0
SortUtil.swap(queue,j,k); H'q&1^w)
k = j; `RthX\Tof
} ;wL*
} _xl#1>G^J
private void fixUp(int k) { $-=aqUU
while (k > 1) { {;n?c$r
int j = k >> 1; fX[,yc;
if (queue[j]>queue[k]) >:W)9o
break; i_`YZ7Hxp
SortUtil.swap(queue,j,k); #7lkj:j4
k = j; thipfS
} +A~lPXAXW
} g#9w5Q
XhWMvme
} sx*1D9s_
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} $rFv(Qc^=
"'t<R}t!A
SortUtil： +FY-r[_~
"*+epC|ks
package org.rut.util.algorithm; Ct}"o
<Cg;l<$`b
import org.rut.util.algorithm.support.BubbleSort; GVn9=[r
import org.rut.util.algorithm.support.HeapSort; _9!Ru!u~
import org.rut.util.algorithm.support.ImprovedMergeSort; RVI],O
import org.rut.util.algorithm.support.ImprovedQuickSort; ,yV pB)IQ
import org.rut.util.algorithm.support.InsertSort; qhK;#<#
import org.rut.util.algorithm.support.MergeSort; "MoV*U2s,
import org.rut.util.algorithm.support.QuickSort; 5Hr(9)
import org.rut.util.algorithm.support.SelectionSort; JGj_{|=:
import org.rut.util.algorithm.support.ShellSort; /R|"/B0
}Lb];hww1
/** YQQ!1hw
* @author treeroot wTIf#y1=9
* @since 2006-2-2 zE<vFP-1v
* @version 1.0 yA%[u.{
*/ }ZVNDvGH
public class SortUtil { ?a}eRA7
public final static int INSERT = 1; cLR8U1k'
public final static int BUBBLE = 2; Xo%Anqk
public final static int SELECTION = 3; XJ?@l3D:
public final static int SHELL = 4; }PED#Uv
public final static int QUICK = 5; Y Nq<%i!>
public final static int IMPROVED_QUICK = 6; PU-~7h+$
public final static int MERGE = 7; 0 |F(qR
public final static int IMPROVED_MERGE = 8; ioa 1n=j
public final static int HEAP = 9; zEO 9TuBO
#( kT
public static void sort(int[] data) { oK(ua
sort(data, IMPROVED_QUICK); kY_UY~E
} }DZkCzK
private static String[] name={ ^xqh!
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" xPb`CY7
}; W]M[5p]*
8i:b~y0
private static Sort[] impl=new Sort[]{ VJ=!0v
new InsertSort(), IgFz[)
new BubbleSort(), 9R ugkGy
new SelectionSort(), Z>M*!mQi
new ShellSort(), q5HHMHB
new QuickSort(), OmoY] 8N}
new ImprovedQuickSort(), Q'A->I<;_s
new MergeSort(), [,1j(s`N5
new ImprovedMergeSort(), K} ;uH,
new HeapSort() ait/|a
}; QkF-}P%
eGguq~s`
public static String toString(int algorithm){ JT_#>',
return name[algorithm-1]; P AKh v.7
} }>0UaK
\lY26'
public static void sort(int[] data, int algorithm) { w6wXe_N+M
impl[algorithm-1].sort(data); 4p1{Ady
} @NyCMe;]
[n:R]|^a
public static interface Sort { E3gQ`+wNg?
public void sort(int[] data); `mWg$e,
} 9]7^/g*!
vkt)!hl `
public static void swap(int[] data, int i, int j) { q g%<>B&"
int temp = data; tGf
data = data[j]; :^ cA\2=
data[j] = temp; %*s[s0$c
} \}<nXn!
} zF{z_c#3@