[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; 5|b/G
} w.3R1}R
int i1=l; \<8!b{F
int i2=mid+1; #=tWCxf=
for(int cur=l;cur<=r;cur++){ Z\Q7#dl
if(i1==mid+1) c1/x,1LnMf
data[cur]=temp[i2++]; @4|/| !
else if(i2>r) pr?/rXw
data[cur]=temp[i1++]; 8 2qe|XD4p
else if(temp[i1] data[cur]=temp[i1++]; f6#H@ X
else p<jr&zVEc>
data[cur]=temp[i2++]; NX;&V7
} '71btd1
} J0K"WmW
o#Y1Uamkf
} 1Y`MJ\9
pxF!<nN1,
改进后的归并排序: -K!-a'J
vuAjAeKm
package org.rut.util.algorithm.support; e,BJD>N ?
G pd:k
import org.rut.util.algorithm.SortUtil; ;CW$/^QNr5
3)ip@29F
/** |j+~Td3})&
* @author treeroot ieI-_]|[
* @since 2006-2-2 YU`{
* @version 1.0 YszhoHYh
*/ 26**tB<
public class ImprovedMergeSort implements SortUtil.Sort { &td#m"wI
EAfSbK3z
private static final int THRESHOLD = 10; x:xQXjJ
{)y4Qp
/* _H,RcpyJ
* (non-Javadoc) )t4C*+9<U
* phdN9<Z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) c1^3lgPv
*/ p.HA`R>
public void sort(int[] data) { %F~ dmA#:
int[] temp=new int[data.length]; GyCpGP|AZ
mergeSort(data,temp,0,data.length-1); .DQ]q o]OG
} VX%+!6+fS
`et<Z
private void mergeSort(int[] data, int[] temp, int l, int r) { *v9G#[gG
int i, j, k; W@tLT[}CG
int mid = (l + r) / 2; :-Pj )Y{I
if (l == r) )N/KQ[W
return; 7Tbkti;
if ((mid - l) >= THRESHOLD) cG?266{g
mergeSort(data, temp, l, mid); B_S3}g<~
else bo2Od
insertSort(data, l, mid - l + 1); RB"rx\u7K
if ((r - mid) > THRESHOLD) Ie~~LU
mergeSort(data, temp, mid + 1, r); EkX6> mo
else 0#JBz\
insertSort(data, mid + 1, r - mid); R<=t{vTJ5
QZlUUj\
for (i = l; i <= mid; i++) { 6D0,ME#
temp = data; 0TpA3K
} a|NU)mgEI
for (j = 1; j <= r - mid; j++) { *pMA V[^
temp[r - j + 1] = data[j + mid]; \a!<^|C&
} {aSq3C<r
int a = temp[l]; rXPXO=F1/
int b = temp[r]; S&*pR3,u
for (i = l, j = r, k = l; k <= r; k++) { g6V*wjC
if (a < b) { <G>PPf}
data[k] = temp[i++]; N[-)c,O
a = temp; *C BCQp[$
} else { 7h2bL6Y88
data[k] = temp[j--]; <c#[.{A}s
b = temp[j]; zCrcCr
} YO,ldsSz|r
} W}RR_Gu
} *QG;KJ%
@jHio\/_
/** (R-Q9F+;
* @param data ~'3% Qr
* @param l je-s%kNlJ
* @param i Q1Ao65
*/ .yPx'_e
private void insertSort(int[] data, int start, int len) { ZTZE_[
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); bRp[N
} WQx;tX
} KfNXX>'
} %u}sVRJ
} vknFtpx
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堆排序： ;"Y6&YP<
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package org.rut.util.algorithm.support; M6iKl
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import org.rut.util.algorithm.SortUtil; }b`*%141
|xm|Q(PG
/** ;>N ~,Q
* @author treeroot z3]U%y(,
* @since 2006-2-2 &/9oi_r%r
* @version 1.0 V{{x~Q9
*/ _3a 5/IZ
public class HeapSort implements SortUtil.Sort{ 3iw9jhK!W
j&.BbcE45
/* (non-Javadoc) 7krA+/Qr(
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) d}_c(
*/ z7C1&bGe
public void sort(int[] data) { =*jcO119L
MaxHeap h=new MaxHeap(); x3|'jmg
h.init(data); DlI5} Jh
for(int i=0;i h.remove(); }c%y0)fL
System.arraycopy(h.queue,1,data,0,data.length); ?C35
} T*yveo&j
sA}R!
private static class MaxHeap{ e%6{P
9 NQq=@
void init(int[] data){ MVZ>:G9:
this.queue=new int[data.length+1]; kqw? X{
for(int i=0;i queue[++size]=data; _+iz?|U
fixUp(size); K8Zk{on
} B:cOcd?p
} fx:KH:q3
(N4(r<o;
private int size=0; 'OCo1|iK~
->=++
private int[] queue; J-F_XKqH
4sjr\9IDC
public int get() { +;;%Atgn
return queue[1]; }8 _9V|E
} J_|x^
(B<AK4G
public void remove() { KTt$Pt/.
SortUtil.swap(queue,1,size--); Xkom@F~]
fixDown(1); ton`ji\^
} :g[x;Q[@
file://fixdown uFZB8+
private void fixDown(int k) { x35s6
int j; tL{~O=
while ((j = k << 1) <= size) { 0z7mre^Q
if (j < size %26amp;%26amp; queue[j] j++; 7"ps#)O
if (queue[k]>queue[j]) file://不用交换 G6{A[O[
break; RI3{>|*
SortUtil.swap(queue,j,k); ;bX ~4O&v+
k = j; shIi,!bZ
} #%b()I_([
} F t/ x5
private void fixUp(int k) { s$x] fO
while (k > 1) { }TJ|d=
int j = k >> 1; -i5g 8t'
if (queue[j]>queue[k]) c0q)
break; `e>F<{ M6@
SortUtil.swap(queue,j,k); 2EwWV0BS
k = j; _PUm Pom.
} Gj`Y2X2r
} cE5Zxcn
?^ezEpW
} `sy &dyM
3,I >.3
} b.q"s6u
A>%UYA
SortUtil： +WN>9V0H
'. Hp*9R
package org.rut.util.algorithm; h!av)nhM
l~TIFmHkh%
import org.rut.util.algorithm.support.BubbleSort; zy6(S_j
import org.rut.util.algorithm.support.HeapSort; a<jE25t
import org.rut.util.algorithm.support.ImprovedMergeSort; sJK:xk.6!
import org.rut.util.algorithm.support.ImprovedQuickSort; ZHECcPhz
import org.rut.util.algorithm.support.InsertSort; :*:fun
import org.rut.util.algorithm.support.MergeSort; kah3Uhr~
import org.rut.util.algorithm.support.QuickSort; %%cSvPcz
import org.rut.util.algorithm.support.SelectionSort; Kx185Q'W
import org.rut.util.algorithm.support.ShellSort; 0nq}SH
p6Dv;@)Yn
/** wx%nTf/Oa
* @author treeroot !riMIl1
* @since 2006-2-2 f\_!N "HW
* @version 1.0 [j]J_S9jJ
*/ ec4%Wk2
public class SortUtil { S{i@=:
public final static int INSERT = 1; bSR+yr'?
public final static int BUBBLE = 2; _JJKbi
public final static int SELECTION = 3; _% 9+U[@
public final static int SHELL = 4; ) v5n "W
public final static int QUICK = 5; 7h9[-d6
public final static int IMPROVED_QUICK = 6; R|J>8AL}BY
public final static int MERGE = 7; [S&O-b8A
public final static int IMPROVED_MERGE = 8; fwv T2G4
public final static int HEAP = 9; <&s)k
+M O5'z
public static void sort(int[] data) { J*~2:{=%
sort(data, IMPROVED_QUICK); gq_7_Y/
} j /dE6d
private static String[] name={ p$1Rgm\
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ?Ga2K
}; #C;zS9(]B
]n]uN~)9
private static Sort[] impl=new Sort[]{ 7M#$: Fdb
new InsertSort(), NQiecxvt=
new BubbleSort(), l9NOzAH3
new SelectionSort(), D7WI(j\
new ShellSort(), l&??2VO/t
new QuickSort(), K*U=;*p)
new ImprovedQuickSort(), P[I*%
new MergeSort(), d?&!y]RS#
new ImprovedMergeSort(), "K+N f
new HeapSort() vgA!?P3
}; eIUuq&(
UG"6RW @
public static String toString(int algorithm){ g[wP!y%V
return name[algorithm-1]; *JY`.t
} O})u'
Hdbnb[e
public static void sort(int[] data, int algorithm) { UK~B[=b9
impl[algorithm-1].sort(data); g t^]32$
} 5 2@udp
3Da,]w<
public static interface Sort { E/8u'
public void sort(int[] data); w{e3U7;
} 1;Wkt9]9
NM1cyZ
public static void swap(int[] data, int i, int j) { mzV"G>,o
int temp = data; ua$k^m7m5
data = data[j]; ;Up'~BP(
data[j] = temp; 3:~l2KIP4
} 9!xD~(Kr
} f05"3L: