[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; <Sw>5M!j
} DLMM1 A
int i1=l; ?U3X,uv5J
int i2=mid+1; ["]r=l
for(int cur=l;cur<=r;cur++){ rm}OVL
if(i1==mid+1) ipy1tXc
data[cur]=temp[i2++]; Qry?h*p+`
else if(i2>r) hbfTv;=z
data[cur]=temp[i1++]; +JQ/DNv
else if(temp[i1] data[cur]=temp[i1++]; 24;F~y8H
else ]!l]^/.
data[cur]=temp[i2++]; Y*oT(
} 6, =oTmFP
} NJ" d`
R Ptc \4
} (vL-Z[M!
H#yBWvj*H
改进后的归并排序: v(PwE B]
dG5p`N%
package org.rut.util.algorithm.support; ^B)iBfZ
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import org.rut.util.algorithm.SortUtil; /q.iUwSK>
E=PmOw7b
/** liu%K9-r
* @author treeroot !=sM `(=~
* @since 2006-2-2 YXeL7W
* @version 1.0 EtVRnI@
*/ M3>c?,O)J
public class ImprovedMergeSort implements SortUtil.Sort { ~ti{na4W<
JQSp2b@'H
private static final int THRESHOLD = 10; >;|~ z\8
Ih_2")d
/* ib$_x:OO"
* (non-Javadoc) lN@SfM4\
* !2]eVO
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) df@r2 /Y
*/ 6[cC1a3r:
public void sort(int[] data) { vd0;33$L
int[] temp=new int[data.length]; ShFC@)<lJ
mergeSort(data,temp,0,data.length-1); 7;]n+QRfm
} i{1SUx+Re
fcDiYJC*
private void mergeSort(int[] data, int[] temp, int l, int r) { j A/xe
int i, j, k; TCb 7-s
int mid = (l + r) / 2; _wvSLu<q
if (l == r) w0`aW6t#
return; `R\aNgCS}
if ((mid - l) >= THRESHOLD) iv3=J
mergeSort(data, temp, l, mid); h%2;B;p]
else A}./ ;[
insertSort(data, l, mid - l + 1); \J@i:J6x$1
if ((r - mid) > THRESHOLD) |ATz<"q>
mergeSort(data, temp, mid + 1, r); WX2:c,%:
else ey icMy`7{
insertSort(data, mid + 1, r - mid); 5G$sP,n
QOb+6qy:3
for (i = l; i <= mid; i++) { R<"fcsU
temp = data; `TugtzRU
} +@n8DM{b
for (j = 1; j <= r - mid; j++) { P;B<R"
temp[r - j + 1] = data[j + mid]; J`uO~W"
} _tl
int a = temp[l]; 6I5,PB
int b = temp[r]; H83Gx;
for (i = l, j = r, k = l; k <= r; k++) { *OoM[wEY
if (a < b) { \U(;%V
data[k] = temp[i++]; >%x N?%
a = temp; fMGL1VN
} else { /&PRw<}>_o
data[k] = temp[j--]; EL--?<g
b = temp[j]; ]f%yeD
} LYYz =gvZl
} (4;m*'X
} (Nzup3j
b#h}g>l
/** +0{$J\s
* @param data Rv-`6eyAA
* @param l %Y0,ww2
* @param i HNFG:t9
*/ 6bv~E.
private void insertSort(int[] data, int start, int len) { %s|`1`c
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); UG@9X/l}
} olHT* mr
} H8$l }pOz
} PTt#Ixn,
} V'-}B6 3S>
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堆排序： nTG@=C#
2 %`~DVo
package org.rut.util.algorithm.support; q:}Q5gzZ
DQ#rZi3I
import org.rut.util.algorithm.SortUtil; H<Ne\zAv
FR bmeq3c
/** pJnT \~o
* @author treeroot NU]+ {7
* @since 2006-2-2 ?%QWpKO7X
* @version 1.0 ]npsclvJ
*/ .dbZ;`s
public class HeapSort implements SortUtil.Sort{ %S'gDCwq
0.MD_s0)>
/* (non-Javadoc) IjshxNk
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /b|V=j}W
*/ nM=5L:d
public void sort(int[] data) { pm)kocG
MaxHeap h=new MaxHeap(); Wqy\yS [
h.init(data); =sp5.-r
for(int i=0;i h.remove(); =hw&2c
System.arraycopy(h.queue,1,data,0,data.length); #![9QUvcf
} eNQQ`ll@m
~g#$'dS
private static class MaxHeap{ >EacXPt-O
/-{C,+cB
void init(int[] data){ FV 0x/)<z
this.queue=new int[data.length+1]; 9a$\l2
for(int i=0;i queue[++size]=data; sxP1.= W
fixUp(size); vO?\u`vY
} }|KNw*h$
} @zQ.d{
6h?v/\
private int size=0; bjR:5@"
KxA^?,t[
private int[] queue; |.ZYY(}
B_kjy=]O.
public int get() { 6I<^wS9j_
return queue[1]; 3|se]~
} |H .
kWSei3
public void remove() { o0Z~9iF&
SortUtil.swap(queue,1,size--); 4\#b@1]}
fixDown(1); EC:u;2f!
} *wfb~&:}
file://fixdown Y<ZaW{%
private void fixDown(int k) { g"KH~bN
int j; ]"wl*$N
while ((j = k << 1) <= size) { 8@)4)+e
if (j < size %26amp;%26amp; queue[j] j++; #;+ABV
if (queue[k]>queue[j]) file://不用交换 '5usPD
break; ]Yw/}GKB
SortUtil.swap(queue,j,k); ><HHO (74X
k = j; )j_Y9`R
} KUE}^/%z
} G/)]aGr
private void fixUp(int k) { )<~v~|re
while (k > 1) { \]Nt-3|`0
int j = k >> 1; E!s?amM4
if (queue[j]>queue[k]) R(1N]>
break; qr<+@Q
SortUtil.swap(queue,j,k); ~43T$^<w;
k = j; :TZ</3Sw
} dlf nhf
} _rN1(=J
<N~&Leh
} -W\1n#J
&{R]v/{p]
} SK]"JSY`
f|r+qe
SortUtil： ,q".d =6
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package org.rut.util.algorithm; yGs:3KI
|<aF)S4
import org.rut.util.algorithm.support.BubbleSort; g'pB<?'E'
import org.rut.util.algorithm.support.HeapSort; JYesk
import org.rut.util.algorithm.support.ImprovedMergeSort; (Qp53g
import org.rut.util.algorithm.support.ImprovedQuickSort; (c\i.z
import org.rut.util.algorithm.support.InsertSort; &OXWD]5$6
import org.rut.util.algorithm.support.MergeSort; G@(ukt`0}
import org.rut.util.algorithm.support.QuickSort; !l7D1i~
import org.rut.util.algorithm.support.SelectionSort; -*nd5(lY&
import org.rut.util.algorithm.support.ShellSort; HX`>" ?{
z0F'zN3J
/** ;;]^d_
* @author treeroot A.|98*U%
* @since 2006-2-2 *[ww;
* @version 1.0 o_#F,gze)S
*/ 0kiV-yc
public class SortUtil { Ij_h #f
public final static int INSERT = 1; V|q`KOF
public final static int BUBBLE = 2; 0;X0<IV
public final static int SELECTION = 3; ?3t]9z
public final static int SHELL = 4; 5;:964Et
public final static int QUICK = 5; G,-x+e"
public final static int IMPROVED_QUICK = 6; 66Tx>c"H
public final static int MERGE = 7; cg|C S?
public final static int IMPROVED_MERGE = 8; qN@-H6D1=
public final static int HEAP = 9; h+ggrwg'
}~bx==SF6!
public static void sort(int[] data) { 1=^edQ+
sort(data, IMPROVED_QUICK); BIn7<.&
} ;XDGlv%
private static String[] name={ OGGuVY
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 7.!`c-8 u
}; fEYo<@5c]
vUD>+*D
private static Sort[] impl=new Sort[]{ ?E|be )
new InsertSort(), ?,AWXiif
new BubbleSort(), ,^m;[Dl7
new SelectionSort(), \1H~u,a
new ShellSort(), Eq82?+9
new QuickSort(), B.ar!*X
new ImprovedQuickSort(), "l7))>lL
new MergeSort(), dp=#|!jc
new ImprovedMergeSort(), +}Q@{@5w
new HeapSort() Lk8NjK6
}; YYi:d=0<SO
mcm8|@Y{
public static String toString(int algorithm){ us2RW<Oxv
return name[algorithm-1]; 4/+P7.}ea-
} ?]Wg{\NC6
7jtDhsVz
public static void sort(int[] data, int algorithm) { .0ExHcr
impl[algorithm-1].sort(data); hL(zVkYI
} IuOY.c2.u
qs 0'}>
public static interface Sort { w`a(285s)i
public void sort(int[] data); 9i`sSi8
} V.H<KyaJ
O<}KrmUC~
public static void swap(int[] data, int i, int j) { n| [RXpAp3
int temp = data; jv5Os-
data = data[j]; jC3)^E@:"
data[j] = temp; 8r-'m%l
} <}z,!w8
} nLjc.Z\Bl