[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; Gt;U9k|i
} m-R`(
int i1=l; yD(v_J*
int i2=mid+1; c{!XDiT]P
for(int cur=l;cur<=r;cur++){ vf?m-wh
if(i1==mid+1) 9On(b|mT
data[cur]=temp[i2++]; ICUI0/J
else if(i2>r) I=|}%WO#
data[cur]=temp[i1++]; H#B97IGT
else if(temp[i1] data[cur]=temp[i1++]; =EUi|T4:
else ?Bsc;:KF
data[cur]=temp[i2++]; !N\i9w}
} 6Lz:J:Q)
} B^BbA-I
kx07Ium
} g/OL^A
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改进后的归并排序: 89[OaT_hs
XZ_vbYTj
package org.rut.util.algorithm.support; }bYk#6KX
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import org.rut.util.algorithm.SortUtil; c'Zs2s7$
Uc5BNk7<=
/** -4t!k Aw`
* @author treeroot O*PJr[Zou
* @since 2006-2-2 OB\jq!"
* @version 1.0 JV;-P=o1B
*/ HKYJgx
public class ImprovedMergeSort implements SortUtil.Sort { *"sDsXo- I
="s>lI-1a
private static final int THRESHOLD = 10; YHI@Cj
kcZz WG|n
/* 5 DvD
* (non-Javadoc) FWuk@t[<O
* i`EG80\[Z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) qh/}/Sl;
*/ EALgBv>#ZL
public void sort(int[] data) { T<~?7-O"
int[] temp=new int[data.length]; )U:W 9%
mergeSort(data,temp,0,data.length-1); kqp*o+Oz',
} ~k/GmH
2qDVAq^@
private void mergeSort(int[] data, int[] temp, int l, int r) { ( 2i{8
int i, j, k; Y1L7sH 9
int mid = (l + r) / 2; 0 A6%!h
if (l == r) OM#eJ,MH<)
return; Nx<%'-9)|
if ((mid - l) >= THRESHOLD) z#t;n
mergeSort(data, temp, l, mid); IGcYPL\&
else Un{9reX5
insertSort(data, l, mid - l + 1); @M8vPH
if ((r - mid) > THRESHOLD) [h~#5x
mergeSort(data, temp, mid + 1, r); T|ZJ$E0
else o7t#yw3
insertSort(data, mid + 1, r - mid); }XIUz|
^3w >:4m
for (i = l; i <= mid; i++) { |f<-lB[k
temp = data; HbQ+:B]
} #~:@H&f790
for (j = 1; j <= r - mid; j++) { o :_'R5
temp[r - j + 1] = data[j + mid]; [qQ~\]
} y<*/\]t9L[
int a = temp[l]; ^y3snuLtE
int b = temp[r]; Qj(|uGqm3
for (i = l, j = r, k = l; k <= r; k++) { L(\o66a-rV
if (a < b) { f>jAu;S
data[k] = temp[i++]; xGo,x+U*
a = temp; z*OQ4_
} else { ,-_\Y hY>
data[k] = temp[j--]; Yp8GW1@
b = temp[j]; Yb Dz{m
} fv?vfI+m
} \EOPlyf8x
} 9{XC9\~
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/** ahqsbNu1
* @param data 3Fl!pq]
* @param l Q:sw*7"F
* @param i } 2P,Z6L
*/ 9ld'SB:#
private void insertSort(int[] data, int start, int len) { OAd}#R\U
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); E6mwvrm8
} @G:aW\Z
} G$!JJ. )d
} vILq5iR
} L[cl$pYV
K!BS?n;
堆排序： t&L+]I'P3
p:CpY'KV_
package org.rut.util.algorithm.support; "L~qsFL
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import org.rut.util.algorithm.SortUtil; F)^:WWVc#
tv8}O([
/** y{]iwO;
* @author treeroot 2/v9
* @since 2006-2-2 O6Jn$'os1#
* @version 1.0 =&xNdc
*/ 'Z=8no`<
public class HeapSort implements SortUtil.Sort{ >)p8^jX
/1R` E9
/* (non-Javadoc) WwBs_OMc
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %`1p8>n
*/ hd)HJb-aR
public void sort(int[] data) { u?+i5=N9{
MaxHeap h=new MaxHeap(); k x26nDT(
h.init(data); x=~$ik++
for(int i=0;i h.remove(); uDXRw*rTv
System.arraycopy(h.queue,1,data,0,data.length); T0=%RID%=
} B+8B<xZ
9et%Hn.K'
private static class MaxHeap{ qH1&tW$
!HPye@Ua
void init(int[] data){ ]E!b&
this.queue=new int[data.length+1]; ^B`*4
for(int i=0;i queue[++size]=data; /6PL
fixUp(size); 9C2DW,?
} 1L\\](^ 3
} #`(-Oj2hH
Iurb?
private int size=0; F.[E;gOTo
5h6c W
private int[] queue; mxQPOu
a8wQ,
public int get() { OELh6R
return queue[1]; 8Z:T.Gc
} z1R_a=7
B(TE?[ #
public void remove() { aH!2zC\:T
SortUtil.swap(queue,1,size--); 0l&#%wmJ,
fixDown(1); _2N7E#m"S
} \2Atm,#4
file://fixdown &W@#pG
private void fixDown(int k) { yRF %SWO
int j; { *&Wc Os
while ((j = k << 1) <= size) { :t8?!9g
if (j < size %26amp;%26amp; queue[j] j++; O<KOsu1WW
if (queue[k]>queue[j]) file://不用交换 Y)oF;ko:
break; ta'{S=^j
SortUtil.swap(queue,j,k); ;VI/iwg
k = j; / 80Q
} |k ]{WCD]
} pDloew
private void fixUp(int k) { PZjK6]N\
while (k > 1) { #o/
int j = k >> 1; N!#0O.6
if (queue[j]>queue[k]) n |e=7?H8
break; UcI;(Va
SortUtil.swap(queue,j,k); H0P:t(<Gt
k = j; T4lE-g2%M
} Z;qgB7-M
} ]8;2Oh
9ER!K
} '1r<g\l
+IkL=/';#
} )] C"r_
io1hUZ
SortUtil： {^jk_G\ys
lI*uF~ 'D
package org.rut.util.algorithm; W8><
6PyODW;R/5
import org.rut.util.algorithm.support.BubbleSort; P1>?crw
import org.rut.util.algorithm.support.HeapSort; 9-( \\$%
import org.rut.util.algorithm.support.ImprovedMergeSort; BdQ/kXZu+
import org.rut.util.algorithm.support.ImprovedQuickSort; }F<=
import org.rut.util.algorithm.support.InsertSort; ]aN]Ha
import org.rut.util.algorithm.support.MergeSort; k`u.:C&
import org.rut.util.algorithm.support.QuickSort; ObyF~j}j
import org.rut.util.algorithm.support.SelectionSort; ["65\GI?
import org.rut.util.algorithm.support.ShellSort; DbIn3/WNe
'] $mt
/** 5dXDL~/2p
* @author treeroot j :$Ruy
* @since 2006-2-2 4!k0
* @version 1.0 li7"{+ct
*/ L7rH=gZ&!]
public class SortUtil { u P&<
public final static int INSERT = 1; Mr6q7
public final static int BUBBLE = 2; l?Qbwv}
public final static int SELECTION = 3; HV}*}Ty
public final static int SHELL = 4; OB5t+_s
public final static int QUICK = 5; GJo`9
public final static int IMPROVED_QUICK = 6; oT}-i [=}
public final static int MERGE = 7; wk[4Qsk<
public final static int IMPROVED_MERGE = 8; hqwDlapTt
public final static int HEAP = 9; N6thbH@
7LrWS83
public static void sort(int[] data) { )r|Pm-:A{
sort(data, IMPROVED_QUICK); cf{rK`Ff^
} IQNvhl.{
private static String[] name={ 59X'-fg,
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Y0Bd[
}; 3Q\k!$zq
tB/'3#o
private static Sort[] impl=new Sort[]{ ,\^RyHg
new InsertSort(), uJ9 hU`h
new BubbleSort(), >tQ$V<YB
new SelectionSort(), 57`*5X
new ShellSort(), YU6D;
new QuickSort(), 9J4gDw4<
new ImprovedQuickSort(), E~K5n2CI
new MergeSort(), f C_H0h3
new ImprovedMergeSort(), H5X.CcI&}
new HeapSort() r t\eze_5A
}; "IuPg=|#
<<~swN
public static String toString(int algorithm){ x4^*YZc$,
return name[algorithm-1]; qtYVX:M@,
} h'|J$
=OR"Bd:O
public static void sort(int[] data, int algorithm) { <S@XK%
impl[algorithm-1].sort(data); >m'n#=yap
} jx[g;7~X
,/Usyb,`
public static interface Sort { m!LJK`gA
public void sort(int[] data); /Ps5Og
} RQQ\y`h`
hreG5g9{
public static void swap(int[] data, int i, int j) { mh"9V5T
int temp = data; sRaTRL2
data = data[j]; t^5xq8w8
data[j] = temp; ;oGpB#[zO
} T'${*NVn
} wG}Rh,