[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; o^ XtU5SVq
} []D@Q+1
int i1=l; 2p"WTd
int i2=mid+1; p/h Rk<K6
for(int cur=l;cur<=r;cur++){ 5L!y-3
if(i1==mid+1) tToTxf~
data[cur]=temp[i2++]; 7nuU^wc
else if(i2>r) AnT3M.>ek
data[cur]=temp[i1++]; p|]\P%,\
else if(temp[i1] data[cur]=temp[i1++]; tPF.r
else g1(IR)U!z
data[cur]=temp[i2++]; /E\%>wv
} [KxF'mz9
} C9t4#"
S9#)A->
} h2D>;k
%VnbmoO
改进后的归并排序: >FkWH7
R2 V4#
package org.rut.util.algorithm.support; Bi{$@n&?f
5;HH4?]p
import org.rut.util.algorithm.SortUtil; Gy(=706
87YyDWTn
/** )+6MK(<"
* @author treeroot ->V<DZK
* @since 2006-2-2 y`=]T>X&x
* @version 1.0 S;- LIv
*/ ctGL-kp
public class ImprovedMergeSort implements SortUtil.Sort { GN2Sn`;
lg&t8FHa;
private static final int THRESHOLD = 10; &c,kQo+pA
VzVc37Z>6
/* b1($R[
* (non-Javadoc) 7"C$pm6
* j}C}:\-fY
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Ct>GYk$
*/ UNBH
public void sort(int[] data) { mrjswF27$o
int[] temp=new int[data.length]; V=*wKuB
mergeSort(data,temp,0,data.length-1); <Sr
} w.TuoWo>
[D4Es
private void mergeSort(int[] data, int[] temp, int l, int r) { kbe-1 <72
int i, j, k; {Ja!~N;3
int mid = (l + r) / 2; 1|jt"Hz
if (l == r) ?pd8w#O
return; :\o {_
if ((mid - l) >= THRESHOLD) VFys.=
mergeSort(data, temp, l, mid); H7DJ~z~J
else mVpMh#zw
insertSort(data, l, mid - l + 1); gp\<p-}
if ((r - mid) > THRESHOLD) .~7FyLl$
mergeSort(data, temp, mid + 1, r); ?)ONf#4Y
else ;N?]eM}yf
insertSort(data, mid + 1, r - mid); p|p l
^\S~?0^m
for (i = l; i <= mid; i++) { Ug<#en
temp = data; qO|R^De
} m*kl
for (j = 1; j <= r - mid; j++) { q1KZ5G)6GJ
temp[r - j + 1] = data[j + mid]; \}|o1Xh2
} Sxh]R+Xb
int a = temp[l]; Iepsz
int b = temp[r]; jJPGrkr
for (i = l, j = r, k = l; k <= r; k++) { 4.5|2\[
if (a < b) { pWJFz-
data[k] = temp[i++]; V: TM]
a = temp; L bmawi^
} else { JVSA&c%3
data[k] = temp[j--]; ybKWOp:O
b = temp[j]; lE(a%'36
} W~7A+=&
} LF& z
} $cU!m(SILQ
$arK(
/** YF>m$?;
* @param data #6HA\dE
* @param l t,+nQ9
* @param i )u`[6,d
*/ ia+oX~W!VR
private void insertSort(int[] data, int start, int len) { {C N~S*m
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 7\s"o&G
} ?b>,9A.Z
} IHv[v*4:
} 9^#c| 0T
} f@|A[>"V
J`].:IOh
堆排序： oUQ,61H
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package org.rut.util.algorithm.support; %UERc{~o*,
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import org.rut.util.algorithm.SortUtil; HOJs[mqB%
`3WFjU5a
/** P"8~$ P#
* @author treeroot kr9*,E9cv
* @since 2006-2-2 n|RJ;d30Q
* @version 1.0 ORJIo
*/ mQ|v26R
public class HeapSort implements SortUtil.Sort{ !u[eaLxV
)9"_J9G
/* (non-Javadoc) r\-uJ~8N
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) b((M)Gz
*/ |8l<$J
public void sort(int[] data) { @v)p<r^M">
MaxHeap h=new MaxHeap(); :2rZcoNb.
h.init(data); 8"8t-E#?
for(int i=0;i h.remove(); oldA#sA$
System.arraycopy(h.queue,1,data,0,data.length); Ki$MpA3j
} f$Fhf?'
R5-@
private static class MaxHeap{ P"IPcT%Ob%
%u5L!W&
void init(int[] data){ CFMo)"
this.queue=new int[data.length+1]; %Q fO8P
for(int i=0;i queue[++size]=data; e]$}-i@#
fixUp(size); 1Vrh4g.l
} QLvHQtzwX
} J$GUB3 G
<oT^A|JFj
private int size=0; %^4CSh
;RC{<wBTx
private int[] queue; ;S^'V
q$Zh@
public int get() { %\dz m-d(C
return queue[1]; <66X Xh.
} 7e|s wJ>4
0zlb0[
public void remove() { |@ s,XS
SortUtil.swap(queue,1,size--); 4~Vx3gEV:
fixDown(1); =JK@z
} g9}DnCT*.
file://fixdown /_AnP
private void fixDown(int k) { 4C61GB?Vy
int j; NV72
while ((j = k << 1) <= size) { g(qJN<RC/
if (j < size %26amp;%26amp; queue[j] j++; jHE}qE~>5
if (queue[k]>queue[j]) file://不用交换 S >X:ZYYC
break; =S+wCN
SortUtil.swap(queue,j,k); 'MUv5Th
k = j; 4ew" %Cs*
} N~goI#4
} (_mnB W
private void fixUp(int k) { N`5,\TR2f
while (k > 1) { )NXmn95
int j = k >> 1; tl,.fjZn
if (queue[j]>queue[k]) =[cS0Sy
break; (|:M&Cna]
SortUtil.swap(queue,j,k); vNV/eB8#S
k = j; c[wla<dO*
} aeFe!`F
} 6}[I2F_^
:cem,#(=
} cu7hBfj
PV'x+bN5
} 4sF"6+%5d
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SortUtil： 1 d}Z(My
p*4':TFuD;
package org.rut.util.algorithm; :dl]h&C^
I7|Pi[e
import org.rut.util.algorithm.support.BubbleSort; ~?4PBq
import org.rut.util.algorithm.support.HeapSort; ZkRx1S"m
import org.rut.util.algorithm.support.ImprovedMergeSort; ([\
import org.rut.util.algorithm.support.ImprovedQuickSort; 0QXVW}`hz
import org.rut.util.algorithm.support.InsertSort; "}u.v?HYz
import org.rut.util.algorithm.support.MergeSort; qT{U(
import org.rut.util.algorithm.support.QuickSort; W=^#v
import org.rut.util.algorithm.support.SelectionSort; n$xc];j
import org.rut.util.algorithm.support.ShellSort; +Mo9kC
2&:f&"
/** Z0x ar]4V
* @author treeroot fi-WZ
* @since 2006-2-2 a oD`=I*<
* @version 1.0 z1PBMSG
*/ -LK B$
public class SortUtil { m[?E
public final static int INSERT = 1; |oH,
public final static int BUBBLE = 2; #%a;"w
public final static int SELECTION = 3; jaTh^L
public final static int SHELL = 4; s@&`f{
public final static int QUICK = 5; rdl;M>0@
public final static int IMPROVED_QUICK = 6; y I HXg#
public final static int MERGE = 7; AK,J7
public final static int IMPROVED_MERGE = 8; :~b3^xhc^
public final static int HEAP = 9; lGPUIoUo
Bn=by{i
public static void sort(int[] data) { f2Klt6"9
sort(data, IMPROVED_QUICK); #|Y5,a,{
} ][gq#Vx@
private static String[] name={ 3GaQk-
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 5,3'=mA6
}; B6u/mo<
\rx3aJl
private static Sort[] impl=new Sort[]{ *xx'@e|<;
new InsertSort(), .*@;@06?
new BubbleSort(), FOv=!'So
new SelectionSort(), *W4m3Lq
new ShellSort(), w k(VR
new QuickSort(), q MfT>rH
new ImprovedQuickSort(), V]|^&A_c
new MergeSort(), Q8:Has
new ImprovedMergeSort(), !o5 W
new HeapSort() ^W`<gR
}; 9_q#W'/X
(Mo*^pVr
public static String toString(int algorithm){ KSbKEA
return name[algorithm-1]; wj*,U~syB
} Jj>?GAir
NO7J!k?
public static void sort(int[] data, int algorithm) { +6sy-<ZL:
impl[algorithm-1].sort(data); "Q}#^h]F
} ^ZvWR%
sv: 9clJ
public static interface Sort { nno}e/zqf
public void sort(int[] data); mC4zactv
} e}D3d=6`
S@jQX
public static void swap(int[] data, int i, int j) { K,Ef9c/+K
int temp = data; ^!<U_;+
data = data[j]; l7XUXbYp&=
data[j] = temp; 03|PYk 6EW
} \l'm[jy>
} ^Ew]uN>,