[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; |aT&rpt
} 8a^E{x@HT
int i1=l; GuV.7&!x
int i2=mid+1; ~P47:IZf
for(int cur=l;cur<=r;cur++){ R4V~+tnbG&
if(i1==mid+1) J(
data[cur]=temp[i2++]; "0(H! }D
else if(i2>r) <&+\X6w[
data[cur]=temp[i1++]; V4PV@{G
else if(temp[i1] data[cur]=temp[i1++]; 7( &\)qf=n
else #]iSh(|8
data[cur]=temp[i2++]; vt`V<3
} t@`w}o[#
} S<f]Y4A&
LB1AjNJ
} Vg6/1I
9Dq^x&z(
改进后的归并排序: _7h:NLd
F.s*^}L[
package org.rut.util.algorithm.support; ;PO{ ips
J\kGD
import org.rut.util.algorithm.SortUtil; `FjU2 O
/YP,Wfd%
/** A{HP*x~t
* @author treeroot }, < dGmkx
* @since 2006-2-2 =V- ^
* @version 1.0 'UYxVh9D
*/ 3N(5V;ti
public class ImprovedMergeSort implements SortUtil.Sort { 00?_10x)
{<~oa+"
private static final int THRESHOLD = 10; 1%v!8$
VO (KQx
/* A)2eo<ij4
* (non-Javadoc) ^~3u|u
* A&d67,&B
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) e ej:
*/ ;i)NP X
public void sort(int[] data) { %j.B/U$
int[] temp=new int[data.length]; 7Rba@ cs9
mergeSort(data,temp,0,data.length-1); I`$"6 Xy
} kqebU!0-
?5N7,|K)
private void mergeSort(int[] data, int[] temp, int l, int r) { N(6Q`zs
int i, j, k; k10g %K4g
int mid = (l + r) / 2; FZt a
if (l == r) !mjrI "_
return; SBf8Ipe
if ((mid - l) >= THRESHOLD) CAbeb+O
mergeSort(data, temp, l, mid); }T)0:DF1,
else =t/"&[r
insertSort(data, l, mid - l + 1); UJ/=RBfkJ
if ((r - mid) > THRESHOLD) !-cO0c!
mergeSort(data, temp, mid + 1, r); gB3Tz(!
else Y<]A5cm
insertSort(data, mid + 1, r - mid); TFQX}kr]
;JD/4:
for (i = l; i <= mid; i++) { #nD]G#>e
temp = data; T3_3k.,|
} /8Sr(
for (j = 1; j <= r - mid; j++) { KW&vX%i(.
temp[r - j + 1] = data[j + mid]; m0}1P]dc
} P^)J^{r
int a = temp[l]; %KkMWl&:
int b = temp[r]; aqw;T\GI+~
for (i = l, j = r, k = l; k <= r; k++) { ?oD]J
if (a < b) { Rv/=bY
data[k] = temp[i++]; pzQWr*5a
a = temp; *_ U=KpZF
} else { pX/42W
data[k] = temp[j--]; !wU~;sL8C3
b = temp[j]; Ag82tDL[u
} 1MPn{#Ff
} Z ? F*Z0y
} 2Hp<(
<hv {,1p-r
/** i?+>,r@\p
* @param data L'@@ewA
* @param l ;bMmJ>[l-
* @param i $q%l)]+
*/ '",+2=JJ
private void insertSort(int[] data, int start, int len) { U9/>}Ni%3G
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); :~ ; 48m
} 6+iZJgwAy
} ?O|CY
} Lc?q0x^s
} g{U?Y"
fJdTVs@
堆排序： YM`I&!n
mR1|8H!f
package org.rut.util.algorithm.support; AB0>|.
*@-a{T}
import org.rut.util.algorithm.SortUtil; "Ei' FM
DZ*m"Bi
/** .1@8rVp7
* @author treeroot O~bJ<O=?
* @since 2006-2-2 d"#& VlKcv
* @version 1.0 $psPNJG
*/ iYR`|PJi
public class HeapSort implements SortUtil.Sort{ w dpd`
l(j._j~p
/* (non-Javadoc) -n#fj;.2_
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4^uwZ:
*/ 6qYK"^+xu
public void sort(int[] data) { D:DtP6
MaxHeap h=new MaxHeap(); 6EY W:o
h.init(data); e'MLLC[
for(int i=0;i h.remove(); T{B\1|2w
System.arraycopy(h.queue,1,data,0,data.length); TMAart;<
} MWHzrqCA
C<"b99\2`
private static class MaxHeap{ FS^ie|8{D-
G$7!/O%#_
void init(int[] data){ {K ,-fbE
this.queue=new int[data.length+1]; p/4}SU
for(int i=0;i queue[++size]=data; ?'%9
fixUp(size); &$<7]a\dM
} &l;wb.%ijW
} (|t)MnPfY
&C&?kS(
private int size=0; 96P3B}Dk
}:9UI
private int[] queue; ov%.+5P
c8}jO=/5+
public int get() { geJO#;
return queue[1]; 1 ,e`,
} FtmI\,
wpS $-
public void remove() { ^h~oxZJw
SortUtil.swap(queue,1,size--); =Xu(Js-
fixDown(1); l~j{i/>
} qytH<UB
file://fixdown IKVS7m
private void fixDown(int k) { V(6GM+
int j; !dZpV~g0
while ((j = k << 1) <= size) { $]I",ef
if (j < size %26amp;%26amp; queue[j] j++; <rAWu\d;
if (queue[k]>queue[j]) file://不用交换 4M3{P
break; !PuW6
SortUtil.swap(queue,j,k); le.(KgRS4
k = j; g4=6\vg
} Qe;j_ BH
} ^iz2=}Q8
private void fixUp(int k) { M-+pYv#&P
while (k > 1) { $kCXp.#k@~
int j = k >> 1; l!9G
if (queue[j]>queue[k]) N%" /mcO
break; Mg^.~8\de
SortUtil.swap(queue,j,k); .BqSE
k = j; &Dw8GU}1
} ?~fuMy B
} hY^-kdQ>M
{nyVC%@Y
} 9_5tA'Q
WTZr{)e
} }2i3
N,Ys}qP
SortUtil： "H!2{l{
=`y.L5
package org.rut.util.algorithm; *3r{s'm
8jxs%N,aI
import org.rut.util.algorithm.support.BubbleSort; PN@[k:5(
import org.rut.util.algorithm.support.HeapSort; I~: AWS9
import org.rut.util.algorithm.support.ImprovedMergeSort; 0"O22<K3a
import org.rut.util.algorithm.support.ImprovedQuickSort; A"`(^#a
import org.rut.util.algorithm.support.InsertSort; .f~x*@
import org.rut.util.algorithm.support.MergeSort; q9mYhT/Im
import org.rut.util.algorithm.support.QuickSort; FMBzTD
import org.rut.util.algorithm.support.SelectionSort; ~IP3~m D
import org.rut.util.algorithm.support.ShellSort; ]'a9>o
1XvB,DhJ
/** M.QXwIT
* @author treeroot =|G l
* @since 2006-2-2 glvtumv
* @version 1.0 #6 yi
*/ {2,OK=XM|
public class SortUtil { &:ib>EB03=
public final static int INSERT = 1; |Lz:i+;
public final static int BUBBLE = 2; wtL_c
public final static int SELECTION = 3; cr_Q,*
public final static int SHELL = 4; rBUdHd9
public final static int QUICK = 5; #Kp/AN5YC
public final static int IMPROVED_QUICK = 6; oztfr<cUH
public final static int MERGE = 7; std4Nyp
public final static int IMPROVED_MERGE = 8; sG~5O\,E
public final static int HEAP = 9; h0)Wy>B=,
qp@:Zqz8
public static void sort(int[] data) { (&x#VmDL
sort(data, IMPROVED_QUICK); K[(h2&
} &v#*
private static String[] name={ #[a+m
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 1vF^<{%v
}; ua-cX3E
c>*RQ4vE
private static Sort[] impl=new Sort[]{ k_c8\::p#
new InsertSort(), 2Hp#~cE+.
new BubbleSort(), ^KsiTVY
new SelectionSort(), ZJxUv {J
new ShellSort(), Y:0SrB!\
new QuickSort(), qq+fUfB2:
new ImprovedQuickSort(), 3B<$6
new MergeSort(), j+c<0,Kj
new ImprovedMergeSort(), h6dVT9
new HeapSort() TCd1JF0
}; 8R6!SB
K 8gd?88
public static String toString(int algorithm){ aiKZ$KLC
return name[algorithm-1]; b]NSCu*)s
} ;J[1S
4oF8F)ASj
public static void sort(int[] data, int algorithm) { o!3-=<^
impl[algorithm-1].sort(data); YAIDSZ&l[
} U[a;eOLx
GCUzKf&
public static interface Sort { Vc!;O9dP
public void sort(int[] data); L.[ H
} ^]$x/1I;
wv2
public static void swap(int[] data, int i, int j) { ^fLePsmd
int temp = data; J/j?;qx]j
data = data[j]; Xw=>L#Q
data[j] = temp; DFz,>DM;
} oXc!JZ^
} L//Z\xr|