[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; [XK^3pT_
} XdS&s}J[I
int i1=l; r6_g/7.-
int i2=mid+1; -\=s+n_ZP?
for(int cur=l;cur<=r;cur++){ F/33# U
if(i1==mid+1) <k59Ni9
data[cur]=temp[i2++]; )Iu0MN&
else if(i2>r) /G*]3=cSe
data[cur]=temp[i1++]; >1luLp/,$
else if(temp[i1] data[cur]=temp[i1++]; ;ED` 7
else })~M}d2LXB
data[cur]=temp[i2++]; yR?S]
} 44@yQ?
} QX`Qnk|Y
=+>cTV
} .8[*`%K>
tZ|0wPp
改进后的归并排序: O7DaVlln
n{'LF #4l
package org.rut.util.algorithm.support; vH14%&OcN
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import org.rut.util.algorithm.SortUtil; FYe#x]ue
05 56#U&>
/** >+}yI}W;e
* @author treeroot E}-Y!,v^
* @since 2006-2-2 Lt'FA
* @version 1.0 LT+QW
*/ =(]yl_
public class ImprovedMergeSort implements SortUtil.Sort { 3` ,u^ w
AN)exU ?
private static final int THRESHOLD = 10; Bh<DqN
{N.JA=
/* \3K%>
* (non-Javadoc) *z?Vy<u G
* NgI n\) =0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Xg<R+o
*/ 7bk=D~/nSg
public void sort(int[] data) { .|?UqZ(,
int[] temp=new int[data.length]; W"3YA+qpI
mergeSort(data,temp,0,data.length-1); u7>{#]
} QVT|6znw
{KQ]"a 6
private void mergeSort(int[] data, int[] temp, int l, int r) { 85e!)I_
int i, j, k; {pJf~
int mid = (l + r) / 2; |f+`FOliP
if (l == r) rf\/Y"D
return; I \Luw*:
if ((mid - l) >= THRESHOLD) .I h'&
mergeSort(data, temp, l, mid); n^[VN[VC
else X}fu $2
insertSort(data, l, mid - l + 1); %p; 'l
if ((r - mid) > THRESHOLD) `J l/@bE=
mergeSort(data, temp, mid + 1, r); AQ)DiH
else Pl/}`H:R&
insertSort(data, mid + 1, r - mid); q0sdL86
;rj|>
for (i = l; i <= mid; i++) { W]B75
temp = data; =PM6:3aKh
} [\BLb8
for (j = 1; j <= r - mid; j++) { B!j7vXM2
temp[r - j + 1] = data[j + mid]; .X.,.vHx
} &=>|? m8
int a = temp[l]; aGz$A15#
int b = temp[r]; tS[@3h
for (i = l, j = r, k = l; k <= r; k++) { |#i|BVnoE
if (a < b) { Fo.p}j+>
data[k] = temp[i++]; 'nQQqx%v
a = temp; ]@P!Q&V #
} else { 9]4W
data[k] = temp[j--]; _Dq,\}
b = temp[j]; Oaj$Z- f
} ^l8&y;-T
} bc3 T8(
} Bw Cwy
L]e@./C$
/** \2#j1/d4
* @param data xf|vz|J?y
* @param l jCK 0+,;
* @param i 8M6wc394
*/ &P:2`\'
private void insertSort(int[] data, int start, int len) { :jHDeF.A
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 5fDp"-
} N~! GAaD
} sZh| <2
} lHI?GiB@
} Y'U]!c9
n4A#T#D!t3
堆排序： s`dwE*~
+@mgb4_
package org.rut.util.algorithm.support; *|*6q/
aH'=k?Of;
import org.rut.util.algorithm.SortUtil; 8#h~J>u.
.~Gt=F+`s
/** Vjqs\
* @author treeroot |T+YC[T#v
* @since 2006-2-2 CFW#+U#U
* @version 1.0 fN_Ilg)t?5
*/ ozUsp[W>
public class HeapSort implements SortUtil.Sort{ f=cj5T:[
\N a
/* (non-Javadoc) S2PPwCU
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %G>
*/ :zK\t5
public void sort(int[] data) { FCIA8^}s
MaxHeap h=new MaxHeap(); N /Fa^[
h.init(data); cMZ-
for(int i=0;i h.remove(); 6}JW- sA
System.arraycopy(h.queue,1,data,0,data.length); f7v|N)
} []<N@a6VA>
DP6>fzsl
private static class MaxHeap{ UZ-[vD1n
neBcS[
void init(int[] data){ qBF}-N_
this.queue=new int[data.length+1]; $,8}3R5}
for(int i=0;i queue[++size]=data; J/>9w
fixUp(size); ["BD,mB
} Xf%wW[~
} ojbms>a
i~ITRi@
private int size=0; 7*C>4Gs
W%P$$x5&
private int[] queue; <7*d2
W{X5~w(
public int get() { 8dlhL8#
return queue[1]; C+vk9:"
} Xmv^O
"}^}3"/.
public void remove() { \rSofn#c
SortUtil.swap(queue,1,size--); p"|0PlW
fixDown(1); \}:;kO4f
} 6QX2&[qWS
file://fixdown z|v/hUrD
private void fixDown(int k) { M d.^r5r
int j; Q=?YY-*$
while ((j = k << 1) <= size) { \qw1\-q
if (j < size %26amp;%26amp; queue[j] j++; ,T0q.!d
if (queue[k]>queue[j]) file://不用交换 [WUd9fUL
break; z+{Q(8'b]
SortUtil.swap(queue,j,k); \xjI=P'-25
k = j; _r?.%]\.
} m~RMe9Qi
} / TAza9a
private void fixUp(int k) { Rc#c^F<
while (k > 1) { ?XnKKw\
int j = k >> 1; UI_u:a9Q/
if (queue[j]>queue[k]) `2a7y]?
break; f"aqg/l
SortUtil.swap(queue,j,k); Jl@YBzDfF
k = j; V]6CHE:BS
} HImQ.y!B
} fDrjR6xV
4|/=]w
} xF8 8'p'
Ry`Y +
} Rd,5&X$
bq"dKN`
SortUtil： I9hZ&ed16
m98w0D@Ee
package org.rut.util.algorithm; Z3N^)j8
yv2wQ_({
import org.rut.util.algorithm.support.BubbleSort; Lem:zXj
import org.rut.util.algorithm.support.HeapSort; @!,W]?{
import org.rut.util.algorithm.support.ImprovedMergeSort; _\u?]YTv
import org.rut.util.algorithm.support.ImprovedQuickSort; d#u*NwY}
import org.rut.util.algorithm.support.InsertSort; ]^v*2!_(
import org.rut.util.algorithm.support.MergeSort; t$(<9
import org.rut.util.algorithm.support.QuickSort; ;3 /*Z5p
import org.rut.util.algorithm.support.SelectionSort; w3K>IDWI7
import org.rut.util.algorithm.support.ShellSort; +OfHa\Nz
#OVS]Asn}
/** YjzGF=g#
* @author treeroot [KNA5(Y0
* @since 2006-2-2 SxW.dT8{
* @version 1.0 ;, ^AR{+x
*/ Xr]<v%,C
public class SortUtil { p{w:^l(
public final static int INSERT = 1; E#(dri*#t
public final static int BUBBLE = 2; U@"f(YL+"
public final static int SELECTION = 3; ANlzF&K
public final static int SHELL = 4; !d{Ijs'T
public final static int QUICK = 5; VPUm4%?p$
public final static int IMPROVED_QUICK = 6; FV5~sy
public final static int MERGE = 7; 2i~zAD'
public final static int IMPROVED_MERGE = 8; N&]_U%#Q
public final static int HEAP = 9; +J <<me4
4C`p`AQqpQ
public static void sort(int[] data) { UUDZ
sort(data, IMPROVED_QUICK); 1aS66TS3
} Vy@0Got5=
private static String[] name={ "q3W&@
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 3GM9ZPeN:
}; Km!~zG7<
NzG] nsw
private static Sort[] impl=new Sort[]{ *s6(1S
new InsertSort(), rk< 3QXv
new BubbleSort(), p$}1V2h;
new SelectionSort(), Ag_I'
new ShellSort(), (T1d!v"~"
new QuickSort(), 57`9{.HB
new ImprovedQuickSort(), ]udH`{]
new MergeSort(), N5Ih+8zT
new ImprovedMergeSort(), (laVmU?I7
new HeapSort() 3AcCa>
}; ' qN"!\
v<V9Z <ub
public static String toString(int algorithm){ Hi#f Qji
return name[algorithm-1]; LseS8F/q
} o`~%}3
O"m(C[+[
public static void sort(int[] data, int algorithm) { LNI]IITx/
impl[algorithm-1].sort(data); lJdwbuB6
} xF7q9'/F
E2( {[J
public static interface Sort { >f-*D25f%
public void sort(int[] data); 7|^5E*8/
} A)641"[
6i'kc3w
public static void swap(int[] data, int i, int j) { J:G~9~V^
int temp = data; '-vzQd@y
data = data[j]; <XH,kI(%
data[j] = temp; u8Oo@xf0Fr
} 9t_N9@
} zi= gOm