[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; +G*2f V>
} sA=WU(4^
int i1=l; -bT1Qh X
int i2=mid+1; -v#0.3zm
for(int cur=l;cur<=r;cur++){ =-dg]Ol8
if(i1==mid+1) R2Y.s^
data[cur]=temp[i2++]; -~rZ| W~v
else if(i2>r) 5 A2u|UU
data[cur]=temp[i1++]; sI OT6L^7
else if(temp[i1] data[cur]=temp[i1++]; X$0&tmum
else [AA*B
data[cur]=temp[i2++]; i^Ip+J+[
} kp=wz0#
} ?]]7PEee*
0;/},B[A
} Qk)E:
,| Zkpn8
改进后的归并排序: 6|@\\\l
B*AF8wX|
package org.rut.util.algorithm.support; .dQEr~f#}
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import org.rut.util.algorithm.SortUtil; p|&9#?t4A
aBblP8)8;K
/** 7O]$2
* @author treeroot 0Q)m>oL.
* @since 2006-2-2 1$toowb"Zy
* @version 1.0 :H8`z8=0f{
*/ )r`F}_CEL
public class ImprovedMergeSort implements SortUtil.Sort { 8w\ZY>d
*f*o ,~8V1
private static final int THRESHOLD = 10; WW[Gne
)d =8)9B
/* )Zbrg~-@
* (non-Javadoc) <ZXK}5SZ#
* rsPo~nA
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }M|,Z'@*
*/ .?NraydwV
public void sort(int[] data) { D6NgdE7b
int[] temp=new int[data.length]; F&6Xo]?
mergeSort(data,temp,0,data.length-1); bL9XQ:$C
} 4RDdfY\%u
YkJnZ_k/P
private void mergeSort(int[] data, int[] temp, int l, int r) { tGVC"a
int i, j, k; T*bBw
int mid = (l + r) / 2; 'p> *4}
if (l == r) 0NFYFd-50
return; cP,bob]
if ((mid - l) >= THRESHOLD) <"HbX
mergeSort(data, temp, l, mid); <UE-9g5?G
else 3OvQ,^[J4
insertSort(data, l, mid - l + 1); 2(s-8E:
if ((r - mid) > THRESHOLD) t` f.HJe
mergeSort(data, temp, mid + 1, r); fKkH [
else d'UCPg<Y
insertSort(data, mid + 1, r - mid); Cj3C%W
>sl#2,br
for (i = l; i <= mid; i++) { l0@+&Xj
temp = data; 7>$&CWI
} 1J?x2
for (j = 1; j <= r - mid; j++) { k=``Avp?
temp[r - j + 1] = data[j + mid]; =1e>$E#
} N[j*Q 8X_
int a = temp[l]; -j"]1JLQ
int b = temp[r]; e)):U
for (i = l, j = r, k = l; k <= r; k++) { $`'Xb
if (a < b) { ^wTod\y
data[k] = temp[i++]; m)oGeD( !
a = temp; kY.3x#w
} else { -V'h>K
data[k] = temp[j--]; x17K8De
b = temp[j]; n04lTME
} /gUD!@
} l6z}D;4
} ")i>-1_H
bMDj+i
/** FAbl5VW'
* @param data `zjbyY
* @param l 9S! 2r
* @param i vd]75
*/ EN/e`S$)
private void insertSort(int[] data, int start, int len) { H=1Jq
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Hy| X>Z
} $#LR4 [Fq
} }n[<$*W^
} SQ0t28N3h
} oJ`cefcWo
/+zzZnLl-M
堆排序： 7%F8
b@?pofZ`k
package org.rut.util.algorithm.support; vzPuk|q3
z(JDLd
import org.rut.util.algorithm.SortUtil; p0Ra`*f
._A@,]LS}
/** Z`{ZV5
* @author treeroot .!Qo+(
* @since 2006-2-2 %9Y3jB",2
* @version 1.0 '3eL^Aq
*/ lJ$j[Y
public class HeapSort implements SortUtil.Sort{ <WCTJ!Z
7'1 +i
/* (non-Javadoc) R}J}Qb
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) nr>Os@\BU
*/ 6 ~LCj"
public void sort(int[] data) { 8P[aX3T7G
MaxHeap h=new MaxHeap(); 7f,!xh$
h.init(data); 2SHS!6:Rl
for(int i=0;i h.remove(); 5ON\Ve_H
System.arraycopy(h.queue,1,data,0,data.length); e3!0<A[X
} WO<a^g {
m\xlSNW'q
private static class MaxHeap{ s6+`cC4
ro`2IE>
void init(int[] data){ -lDAxp6p
this.queue=new int[data.length+1]; uqFYa bU
for(int i=0;i queue[++size]=data; +q-/~G'
fixUp(size); K]s*rPT/,
} ,"U_oa3
} ?D8+wj
5*P+c(=
private int size=0; w_hN2eYo&e
6<>T{2b:(p
private int[] queue; 1xsIM'&
s%xhT
public int get() { e_Un:r@)
return queue[1]; @?E|]H!S]
} lS!uL9t.
%{*)-_M
public void remove() { .lE7v-e
SortUtil.swap(queue,1,size--); UD}#c:I
fixDown(1); NPY\ >pf
} W<sa6,$
file://fixdown G}8Zkz@+
private void fixDown(int k) { m.EIMuj
int j; dw"{inMf
while ((j = k << 1) <= size) { rwh,RI) )g
if (j < size %26amp;%26amp; queue[j] j++; 5i|DJ6
if (queue[k]>queue[j]) file://不用交换 5wgeA^HE2y
break; hiBZZ+^[
SortUtil.swap(queue,j,k); Li8$Rb~q
k = j; roNRbA]
} j,@@[{tu
} LUN"p#1
private void fixUp(int k) { -Mx\W|YK
while (k > 1) { wu53e= /
int j = k >> 1; YOE!+MiO
if (queue[j]>queue[k]) GX-V|hLaGX
break; BfUM+RC%5
SortUtil.swap(queue,j,k); uS}qy-8J
k = j; @})]4H
} ;2\+O"}4H
} /.m&rS
6! .nj3$*
} HJ^SqSm
yNU.<d 5
} |18h p
9qcA+gz:|
SortUtil： gR\-%<42
uzgQ_
package org.rut.util.algorithm; JDp{d c
yMVlTO
import org.rut.util.algorithm.support.BubbleSort; #|R#/Yc@Bv
import org.rut.util.algorithm.support.HeapSort; kACgP!~/1
import org.rut.util.algorithm.support.ImprovedMergeSort; sjIUW$
import org.rut.util.algorithm.support.ImprovedQuickSort; .,+TpPkc
import org.rut.util.algorithm.support.InsertSort; %!X9>i>
import org.rut.util.algorithm.support.MergeSort; [3|&!:4g6
import org.rut.util.algorithm.support.QuickSort; 7uq/C#N
import org.rut.util.algorithm.support.SelectionSort; +0Z,#b
import org.rut.util.algorithm.support.ShellSort; h}$g}f%$+
/;{E}`
/** R&MdwTa
* @author treeroot rU!QXg]uD
* @since 2006-2-2 4#"_E:;PQ
* @version 1.0 HY!R|
*/ ky#5G-X
public class SortUtil { K*id 1YY
public final static int INSERT = 1; |^k&6QO5
public final static int BUBBLE = 2; 4-voR5Fd
public final static int SELECTION = 3; }"x#uG
public final static int SHELL = 4; ]:_s7v
public final static int QUICK = 5; 8Z[YcLy"({
public final static int IMPROVED_QUICK = 6; `WRM7
public final static int MERGE = 7; o!@}&DE|*L
public final static int IMPROVED_MERGE = 8; h'm-]v
public final static int HEAP = 9; ;vuqI5k
,$A'Y
public static void sort(int[] data) { {a9( Qi
sort(data, IMPROVED_QUICK); =`pH2SJT
} z&KrG
private static String[] name={ JG/Pc1aK
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" "&Rt&S
}; pB5#Ho>S
ATzFs]~K;
private static Sort[] impl=new Sort[]{ )sZJH9[K
new InsertSort(), !%X#;{
new BubbleSort(), :tf'Gw6v
new SelectionSort(), 6m$lK%P{1
new ShellSort(), hH(w O\s
new QuickSort(), U]AJWC6
new ImprovedQuickSort(), .$"13"
new MergeSort(), q"9 2][}
new ImprovedMergeSort(), &,8F!)[9
new HeapSort() J5Ovj,[EZ
}; ;1AXu/
m-u0U
public static String toString(int algorithm){ H5!e/4iz
return name[algorithm-1]; 1tIJ'#6
} J:Idt}@z
N}gPf i
public static void sort(int[] data, int algorithm) { Q&]f9j_
impl[algorithm-1].sort(data); -qqI@+u+
} G0~6A@>
4..M *U
public static interface Sort { [JVEKc ym
public void sort(int[] data); !*e1F9k
} c4V%>A
iz%wozf
public static void swap(int[] data, int i, int j) { cXod43
int temp = data; \)`OEGdOR\
data = data[j]; E< Y!BT[X
data[j] = temp; q>rDxmP<
} 6m%#cP (6K
} YN}vAFR`