[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; `q}I"iS
} [#-b8Cu
int i1=l; @L<*9sLWh
int i2=mid+1; 7Ri46Tkt
for(int cur=l;cur<=r;cur++){ Xe6w|
if(i1==mid+1) ~ {E'@MU
data[cur]=temp[i2++]; wvO|UP H\
else if(i2>r) MLw7}[
data[cur]=temp[i1++]; 0 HGM4[)=
else if(temp[i1] data[cur]=temp[i1++]; R.jIl@p
else sF!($k;!
data[cur]=temp[i2++]; fd+hA
} UK595n;P
} _"?.!
%<k2#6K
} Gw>^[dmt!
FQu8vwV6>
改进后的归并排序: )Xk0VDNp$/
7C,&*Ax,9
package org.rut.util.algorithm.support; O@u?h9?cf>
]op}y0
import org.rut.util.algorithm.SortUtil; 7mI:|G
t[ubn+
/** QS%%^+E2
* @author treeroot nygbt<;?
* @since 2006-2-2 K&vF0*gN3
* @version 1.0 R<\F:9
*/ RN$1bxY
public class ImprovedMergeSort implements SortUtil.Sort { /1"(cQ%?
{G U&a
private static final int THRESHOLD = 10; |jI#"LbF
3LAIl913
/* o<|cA5f\
* (non-Javadoc) I8wXuIN_
* {@eJtF+2
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1C<uz29
*/ u[@l~gwL
public void sort(int[] data) { Eo{"9j\
int[] temp=new int[data.length]; 3.|S
mergeSort(data,temp,0,data.length-1); F~T]u2qt
} }Mstjm
|v \_@09=
private void mergeSort(int[] data, int[] temp, int l, int r) { AJh w
int i, j, k; 1n=lqn/
int mid = (l + r) / 2; &~8oQC-eF
if (l == r) N >FKy'.gk
return; !TAlBkj
if ((mid - l) >= THRESHOLD) 'Q|M'5'
mergeSort(data, temp, l, mid); =d".|k
else 0"kbrv2y
insertSort(data, l, mid - l + 1); XRcqhv
if ((r - mid) > THRESHOLD) {_7i8c<s=
mergeSort(data, temp, mid + 1, r); gRCdY8GH
else 6g|*`x{
insertSort(data, mid + 1, r - mid); d ^^bke$~
GGNvu)"
for (i = l; i <= mid; i++) { BzkooJ
temp = data; 3L<wQ(
} DnC{YK
for (j = 1; j <= r - mid; j++) { E)TN,@%
temp[r - j + 1] = data[j + mid]; 6VS4y-N
} wP6Fl L
int a = temp[l]; QN #U)wn:
int b = temp[r]; J3e96t~u
for (i = l, j = r, k = l; k <= r; k++) { N*"p|yhd]
if (a < b) { s%qF/70'
data[k] = temp[i++]; tX5"UQA
a = temp; S]bmS6#
} else { -K q5i
data[k] = temp[j--]; \#f<!R4
b = temp[j]; UYk/v]ZA
} K?[q%W]%
} xDG2ws=@D
} +fC=UAZ
igIRSN}h
/** 3Ndq>
* @param data 5>CEl2mSl
* @param l zDw5]*R
* @param i 24E}<N,g
*/ /JFUU[W
private void insertSort(int[] data, int start, int len) { + ,%&e
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); :Pvzl1
} gYNjzew'
} 1$D_6U:H0
} +b.g$CRr
} T^Y([23
[h^2Y&Au5
堆排序： M^O2\G#B
*C5R}9O5
package org.rut.util.algorithm.support; nH`Q#ZFz]?
{t0) q
import org.rut.util.algorithm.SortUtil; =7w\ 7-.m
9Xj7~,
/** ZX>AE3wk
* @author treeroot [NaN>BZ?
* @since 2006-2-2 !qv ea,vw
* @version 1.0 (MR_^t
*/ zfc'=ODX
public class HeapSort implements SortUtil.Sort{ SW*"\X;
:ctu5{"UJ
/* (non-Javadoc) _oHNkKQ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [#l*_0
*/ MXw hxk#E
public void sort(int[] data) { b6Wqr/
MaxHeap h=new MaxHeap(); byLft1
h.init(data); ;*Ivn@L
for(int i=0;i h.remove(); oE+R3[D?r
System.arraycopy(h.queue,1,data,0,data.length); 2^y^q2(r
} <}E!w_yi
pnjXf.g"O
private static class MaxHeap{ 4(|cG7>9-
ba[1wFmcL
void init(int[] data){ qHuZcht
this.queue=new int[data.length+1]; v-#Q7T
for(int i=0;i queue[++size]=data; #pb92kA'
fixUp(size); e4!:c^?
} }])oM|fgO
} )\eI;8
%+j8["VEC
private int size=0; LW[9
:[O 8
private int[] queue; ()5[x.xK@
X;i~<Tq
public int get() { EH256f(&
return queue[1]; |.F$G<
} \MbB#
eM$sv9?
public void remove() { [Jogt#Fj ]
SortUtil.swap(queue,1,size--); ?\t#1"d
fixDown(1); %/|9@er
} W+PJZn
file://fixdown HkO7R `
private void fixDown(int k) { *VFf.aPwYi
int j; h-G)o[MA
while ((j = k << 1) <= size) { _CmOd-y
if (j < size %26amp;%26amp; queue[j] j++; vbb5f#WZ
if (queue[k]>queue[j]) file://不用交换 )2bvQy8K
break; 4x
SortUtil.swap(queue,j,k); ~R22?g.
k = j; 1DE1.1
} ;A]@4*q
} {@+Ty]e
private void fixUp(int k) { Yzh"1|O
while (k > 1) { 0\[Chja
int j = k >> 1; 2 lj'"nm
if (queue[j]>queue[k]) MRb-H1+Xf
break; OR%'K2C6S
SortUtil.swap(queue,j,k); U%<koD[,
k = j; Y~L2
} }s(N6a&(
} ~\Hc,5G
EdlTdn@A
} <kGU,@6PF
3QG7C{
} K_RjX>q%N
+89*)pk
SortUtil： 1guJG_;z
`%+Wz0(K
package org.rut.util.algorithm; g/P+ZXJ
-(
import org.rut.util.algorithm.support.BubbleSort; bYEy<7)x
import org.rut.util.algorithm.support.HeapSort; iV&6nh(
import org.rut.util.algorithm.support.ImprovedMergeSort; x4E7X_
import org.rut.util.algorithm.support.ImprovedQuickSort; %Z):>'
import org.rut.util.algorithm.support.InsertSort; ,Wk?I%>
import org.rut.util.algorithm.support.MergeSort; H."EUcE{
import org.rut.util.algorithm.support.QuickSort; d-k%{eBV
import org.rut.util.algorithm.support.SelectionSort; {]:7bV#JP
import org.rut.util.algorithm.support.ShellSort; U)E(`{p]
>8k_n
/** :cF[(i/k4
* @author treeroot ^Wt*
* @since 2006-2-2 xT
* @version 1.0 .(^ ,z&
*/ f33l$pOp
public class SortUtil { - `p4-J!Fy
public final static int INSERT = 1; ] Hztb
public final static int BUBBLE = 2; L*&p!
public final static int SELECTION = 3; [n \2
public final static int SHELL = 4; ]Q>.HH
public final static int QUICK = 5; m 8aITd8
public final static int IMPROVED_QUICK = 6; [_1G@S6Ex
public final static int MERGE = 7; PE5R7)~A
public final static int IMPROVED_MERGE = 8; +RyjF~[e
public final static int HEAP = 9; VXR>]HUF
<Bw^!.jAF
public static void sort(int[] data) { X!9 B2w
sort(data, IMPROVED_QUICK); #,":vr
} j$?{\iXZ
private static String[] name={ C-\S/yd
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ;#vKi0V7
}; whi`Z:~
23Nw!6S
private static Sort[] impl=new Sort[]{ ;\14b?TUH
new InsertSort(), LUM@#3&
new BubbleSort(), ,*7 (%k^`
new SelectionSort(), :lf+W
new ShellSort(), Hn5|B 3vN
new QuickSort(), `f*Q$Ulqx
new ImprovedQuickSort(), #a'Ex=%rM
new MergeSort(), v(ZYS']d2
new ImprovedMergeSort(), tjdaaN#,V
new HeapSort() L?WFmn
}; kBD>-5Sn_T
$5ak_@AC
public static String toString(int algorithm){ P)Rh=U
return name[algorithm-1]; j g8fU
} d@XV:ae
+n{#V;J
public static void sort(int[] data, int algorithm) { gcdlT7F)b-
impl[algorithm-1].sort(data); CGY]r.O*
} -f%'
q*_/to
public static interface Sort { a&c6.#E{y
public void sort(int[] data); +l9!Fl{MK\
} \s=t|Wpu2
C71qPb|$R
public static void swap(int[] data, int i, int j) { E4|jOz^j4\
int temp = data; w5Ay)lz
data = data[j]; BD_Iz A<wK
data[j] = temp; NQ(1
} GP?M!C,/}k
} DU5c=rxW