[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; Vv.r8IGYm
} :ue:QSt(u
int i1=l; *|.0Myjo
int i2=mid+1; `4?~nbz
for(int cur=l;cur<=r;cur++){ =WbOwI)u
if(i1==mid+1) Bq\F?zk<
data[cur]=temp[i2++]; (IqZ@->nw
else if(i2>r) /1=4"|q>h'
data[cur]=temp[i1++]; Rd \.:u
else if(temp[i1] data[cur]=temp[i1++]; H9XvO
else ~/pzxo$
data[cur]=temp[i2++]; Qd_6)M-
} 'NjzgZ~]P
} 7,qYV}
:$;Fhf<5
} }_/Hdmmx
q%n6K
改进后的归并排序: gN8hJG'0
Z%zj";C G
package org.rut.util.algorithm.support; AN:sQX`
!%+2Yifna
import org.rut.util.algorithm.SortUtil; z}QwP~Z
H(c72]@Vg
/** aimarU
* @author treeroot qU2~fNY
* @since 2006-2-2 ,_aM`%q?Fj
* @version 1.0 <P[T!gST
*/ bK"SKV
public class ImprovedMergeSort implements SortUtil.Sort { 1d"Z>k:mn
XgN` 7!Z
private static final int THRESHOLD = 10; h+p*=|j`
@+vXMJ$
/* >WJf=F`_H
* (non-Javadoc) )UgX3+@
* (s<Dd2&.H
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;7]u!Q
*/ iXu]e;6
public void sort(int[] data) { RpWTpT1
int[] temp=new int[data.length]; +y7;81ND
mergeSort(data,temp,0,data.length-1); 6*4's5>?D
} }jt?|dl1
E1dD7r\
private void mergeSort(int[] data, int[] temp, int l, int r) { ^'CPM6J
int i, j, k; n~"$^Vr
int mid = (l + r) / 2; <?-YTY|
if (l == r) `g8E1-]l
return; f0<hE2
if ((mid - l) >= THRESHOLD) 2]GdD*
mergeSort(data, temp, l, mid); =ph&sn$;L
else CTt vyr
insertSort(data, l, mid - l + 1); 6R-&-4
if ((r - mid) > THRESHOLD) YBYZ=,"d
mergeSort(data, temp, mid + 1, r); K8n4oz#z
else >EL)X #e
insertSort(data, mid + 1, r - mid); 'E/*d2CDM(
0iULCK
for (i = l; i <= mid; i++) { H9h@sSg
temp = data; IEKU-k7}Z
} #_lt~^6
for (j = 1; j <= r - mid; j++) { C{sLz9
temp[r - j + 1] = data[j + mid]; S(S#
} xq-17HKs
int a = temp[l]; 7^wc)E^H
int b = temp[r]; gmIqT f
for (i = l, j = r, k = l; k <= r; k++) { ?88[|;b3
if (a < b) { .)}@J5P)
data[k] = temp[i++]; tQZs.1=z
a = temp; &PkLp4mQ
} else { p raaY}}
data[k] = temp[j--]; }I3gU
b = temp[j]; G+B~Ix-
} Z3>N<u8)
} a#mNE*Dg
} F'g Vzf
]\/tVn.'
/** ]| N3eu
* @param data ^~{$wVGa
* @param l a+hd(JX0~
* @param i o]nw0q?
*/ `cPywn@uGZ
private void insertSort(int[] data, int start, int len) { rl9.]~
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ?$f)&O
} uwRr LF
} fLV"T_rk
} 0ye!R
} 4}`
R'kyrEO
堆排序： (D@A74q\'
/R>nr"
package org.rut.util.algorithm.support; e[sK@jX6
|F9z,cc"
import org.rut.util.algorithm.SortUtil; v9Xp97J2
:2njp%
/** e]jH+IR:>
* @author treeroot Bo<>e~6P
* @since 2006-2-2 3 ?Y|
* @version 1.0 XU+<?%u}z
*/ vG \a1H
public class HeapSort implements SortUtil.Sort{ SQeRSz8bK4
YF+n b.0.
/* (non-Javadoc) `ptj?6N-
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) n@ w^V
*/ sAgKg=)
public void sort(int[] data) { P&Pj>!T5
MaxHeap h=new MaxHeap(); ]skkoM
h.init(data); ?"z]A7<Hj
for(int i=0;i h.remove(); mxb06u_
System.arraycopy(h.queue,1,data,0,data.length); n}s~+USZX
} 3Tn)Z1o
5 H#W[^s"
private static class MaxHeap{ YeF1C/'hy
GTHkY*
void init(int[] data){ 0afei4i~N
this.queue=new int[data.length+1]; 3!5Ur&
for(int i=0;i queue[++size]=data; FgLrb#
fixUp(size); _fZZ_0\Q
} WK="J6K5
} *^([ ~[
',GS#~
private int size=0; 4t)%<4
%pXAeeSY`;
private int[] queue; <C9 XX~
{O|'U'
public int get() { {EdH$l>94
return queue[1]; 0rGSH*(
} ' B
PMfkA!.Y
public void remove() { W>q HFoKa
SortUtil.swap(queue,1,size--); lN9=TxH1(;
fixDown(1); c)@>zto#
} c5|:,wkx
file://fixdown "B_K XL
private void fixDown(int k) { cUDoN`fSl,
int j; ho>k$s?
while ((j = k << 1) <= size) { QdLYCR4f
if (j < size %26amp;%26amp; queue[j] j++; VXR]"W=
if (queue[k]>queue[j]) file://不用交换 *xp\4;B
break; }E`dZW*!!
SortUtil.swap(queue,j,k); G;f/Tch
k = j; ' oFxR003
} d|T!v
} gocrjjAHk
private void fixUp(int k) { "*,XL uv>
while (k > 1) { QXF aAb=(7
int j = k >> 1; 5=e@d:Sz
if (queue[j]>queue[k]) WcC?8X2
break; ZNYH#mJX*
SortUtil.swap(queue,j,k); p$ bnK]
k = j; [frq 'c
} ",{ibh)g$`
} o[E_Ge}g8
3pmWDG6L
} KFa_
1xv8gC:6
} 0@2mXO9f"
H5D*|42
SortUtil： yjJ5P`j]
g@\fZTO
package org.rut.util.algorithm; ^xPmlS;X
@-OnHE
import org.rut.util.algorithm.support.BubbleSort; KRjV}\}
import org.rut.util.algorithm.support.HeapSort; 4e;QiTj
import org.rut.util.algorithm.support.ImprovedMergeSort; =}PdH`S
import org.rut.util.algorithm.support.ImprovedQuickSort; BcD&sQ2F
import org.rut.util.algorithm.support.InsertSort; #$3yz'"QF
import org.rut.util.algorithm.support.MergeSort; G<M:Ak+~
import org.rut.util.algorithm.support.QuickSort; 5XLs}:
import org.rut.util.algorithm.support.SelectionSort; nk3y"ne7
import org.rut.util.algorithm.support.ShellSort; *Sh^J+j
nNXgW
/** *'"^NSJ
* @author treeroot |AC1\)2tT
* @since 2006-2-2 '_b.\_s-d
* @version 1.0 %7O?JI[
*/ uIU5.\"s
public class SortUtil { ki>~H!zB
public final static int INSERT = 1; #2iD'>bQ
public final static int BUBBLE = 2; v`1,4,;,qs
public final static int SELECTION = 3; |a{Q0:
public final static int SHELL = 4; )/t?!T.[
public final static int QUICK = 5; LL$_zK{
public final static int IMPROVED_QUICK = 6; Ged[#Q
public final static int MERGE = 7; R-^96fFBy
public final static int IMPROVED_MERGE = 8; r\;ut4wy
public final static int HEAP = 9; YIR R=qpn
sl*5Y#,|1
public static void sort(int[] data) { j5I`a 1j`
sort(data, IMPROVED_QUICK); hR5_+cuIp
} "*O4GPj
private static String[] name={ 2S' {!A
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" $H$j-)\D
}; -|rLs$V1r
!;_H$r0
private static Sort[] impl=new Sort[]{ `yF`x8
new InsertSort(), -X+H2G
new BubbleSort(), wb Iq&>p
new SelectionSort(), kF>o.uSV
new ShellSort(), {)AMwq
new QuickSort(), >hH0Q5aL
new ImprovedQuickSort(), ,ZS6jZ
new MergeSort(), !a$ D4(`v
new ImprovedMergeSort(), mXUYQ82
new HeapSort() -Z-IF#%
}; ](F#`zUQ
B^%1Rpcn
public static String toString(int algorithm){ -+t]15
return name[algorithm-1]; *%vwM7
} `>o?CIdp
{,OS-g
public static void sort(int[] data, int algorithm) { TE )gVE]
impl[algorithm-1].sort(data); `mT$s,:h
} s}j1"@
7OWbAu;
public static interface Sort { ~afg)[(
public void sort(int[] data); q$G,KRy/
} jgS%1/&
]59i>
public static void swap(int[] data, int i, int j) { T;L>P[hNn
int temp = data; hm<}p&!J
data = data[j]; N8`?t5
data[j] = temp; Z0De!?ALV\
} 2DD:~Tbi
} 7hy&-<