[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; 23iMG]J&
} q+J;^u"E
int i1=l; zm{U.Q
int i2=mid+1; .@kjC4m
for(int cur=l;cur<=r;cur++){ 0rA&Q0
if(i1==mid+1) zHg1K,t:
data[cur]=temp[i2++]; "NMSLqO
else if(i2>r) Mr}K-C?ge
data[cur]=temp[i1++]; YD@n8?~$$
else if(temp[i1] data[cur]=temp[i1++]; LJ{P93aq`^
else {;2Gl$\r
data[cur]=temp[i2++]; D=^|6}
} 7jzd I!
} kp=wz0#
)J>-;EYb8
} 0;/},B[A
-|WQs'%O
改进后的归并排序: '[zy%<2sL
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package org.rut.util.algorithm.support; ?E6C|A$I
cq0#~20
import org.rut.util.algorithm.SortUtil; +\yQZ{4'@
-"}mmTa*<
/** j` 5K7~hv
* @author treeroot mh:eUFe
* @since 2006-2-2 ^!j,d_)b!
* @version 1.0 huTWoMU
*/ n]<>$
public class ImprovedMergeSort implements SortUtil.Sort { ~6!TMVr
5f-eWW]!
private static final int THRESHOLD = 10; tXg>R _\C
L Rn)
/* p3W-*lE
* (non-Javadoc) |qq7vx
* g54b}vzm
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) y yqya[-11
*/ Kd|@
public void sort(int[] data) { @ rG=>??k
int[] temp=new int[data.length]; @@pI>~#zh
mergeSort(data,temp,0,data.length-1); =hq+9 R8=
} #k/NS
9J(jbJ7p
private void mergeSort(int[] data, int[] temp, int l, int r) { Pq<]`9/w^w
int i, j, k; )ePQN~#K}
int mid = (l + r) / 2; lG/h[
if (l == r) d>-k-X-[
return; KwxO%/-}S
if ((mid - l) >= THRESHOLD) AD0pmD
mergeSort(data, temp, l, mid); cd3;uB4\,
else ZGgM-O1
insertSort(data, l, mid - l + 1); L; (J6p]h
if ((r - mid) > THRESHOLD) b!gvvg<
mergeSort(data, temp, mid + 1, r); g7g^iLU
else w\{oOlE
insertSort(data, mid + 1, r - mid); 56l1&hp8In
NzAMX+L
for (i = l; i <= mid; i++) { VPI;{0kh
temp = data; ^E}};CsT
} LmjzH@3
for (j = 1; j <= r - mid; j++) { /xh/M@G3
temp[r - j + 1] = data[j + mid]; 1 [D,Mu%E
} 1@6FV x
int a = temp[l]; FJH'!P\
int b = temp[r]; !W48sZr1&
for (i = l, j = r, k = l; k <= r; k++) { _gn`Y(c$%
if (a < b) { ]`H8r y2
data[k] = temp[i++]; 6Sr}I,DG
a = temp; cwC-)#R']
} else { WcZck{ehd
data[k] = temp[j--]; o>?#$~XNv
b = temp[j]; k=``Avp?
} 01&J7A2
} )2dTgvy
} #57D10j
;'7gg]
/** ? 1 ~C`I;
* @param data ` Clh;
* @param l 5fuB((fd(
* @param i jFPD SR5
*/ "inXHxqu/J
private void insertSort(int[] data, int start, int len) { :+Okv$v4
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); k:sFI @g
} (N/KP+J$n
} SXF~>|h5<
} e>~7RN
} Puodsd
@p$$BUb
堆排序： v#`7,::
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package org.rut.util.algorithm.support; A.>L>uR
fXfO9{E
import org.rut.util.algorithm.SortUtil; l6z}D;4
{wy#HYhv
/** \`N<0COP
* @author treeroot bMDj+i
* @since 2006-2-2 XmI63W*
* @version 1.0 yf@DaIG
*/ H;k-@J
public class HeapSort implements SortUtil.Sort{ *wNO3tP't
Di>B:=
/* (non-Javadoc) /+g)J0u
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Lcow2 SbH
*/ C'oNGOEd
public void sort(int[] data) { ,3p$Z
MaxHeap h=new MaxHeap(); o@j)clf
h.init(data); +L>?kr[i[
for(int i=0;i h.remove(); WB(Gx_o3
System.arraycopy(h.queue,1,data,0,data.length); _+NM<o#A
} YfZ96C[a
f>kW\uC
private static class MaxHeap{ i?D KKjN$
CF0i72ul5
void init(int[] data){ jp|1S^b
this.queue=new int[data.length+1]; *@SZ0
for(int i=0;i queue[++size]=data; Im<(
fixUp(size); d^W1;0
} ,'z=cB`+o
} eR*y<K(d
._A@,]LS}
private int size=0; ^Z`?mNq9
lVR a{._m
private int[] queue; Kh,zp{
JVawWw0q
public int get() { :0'2m@x~
return queue[1]; )"4v0dv
} *p=a-s5-
.^aqzA=]
public void remove() { u{d\3-]/
SortUtil.swap(queue,1,size--); W&HF*Aw
fixDown(1); Tn"/EO^N
} T2p;#)dP
file://fixdown }[c,/NH
private void fixDown(int k) { zd-qQ.j0
int j; >2[nTfS
while ((j = k << 1) <= size) { Vb$4'K'
if (j < size %26amp;%26amp; queue[j] j++; A[6D40o
if (queue[k]>queue[j]) file://不用交换 R!2oj_
break; =&YhA}l\O
SortUtil.swap(queue,j,k); .sE5QRVc
k = j; Q( g&/O
} +:jx{*}jo
} 3Lw&HtH
private void fixUp(int k) { GT3?)g{Z
while (k > 1) { 4ht+u
int j = k >> 1; RI</T3%~
if (queue[j]>queue[k]) 1SO!a R#g
break; <-rw>,
SortUtil.swap(queue,j,k); #yi&-9B
k = j; GRq0nhJ
} O[RivHCY
} yK"T5^o
!,z==Qp|v
} N,F$^ q6
d@aPhzLu
} .|Y&,?k|Y
7w?V0pLwn8
SortUtil： unZYFA}(
A1uo@W
package org.rut.util.algorithm; `Eq~W@';Q0
MeMSF8zSQ
import org.rut.util.algorithm.support.BubbleSort; NPY\ >pf
import org.rut.util.algorithm.support.HeapSort; f&ri=VJY\T
import org.rut.util.algorithm.support.ImprovedMergeSort; &w"1VOV<
import org.rut.util.algorithm.support.ImprovedQuickSort; lwj,8
import org.rut.util.algorithm.support.InsertSort; 0<'Q;'2* L
import org.rut.util.algorithm.support.MergeSort; /ij)[WK@
import org.rut.util.algorithm.support.QuickSort; zvAUF8'_
import org.rut.util.algorithm.support.SelectionSort; SG@-b(
import org.rut.util.algorithm.support.ShellSort; 2T >K!jS
~+OAAkJ9
/** G>f2E49BXt
* @author treeroot XjINRC8^4
* @since 2006-2-2 mNDz|Ln
* @version 1.0 Ap)[;_9BD
*/ f9FEH7S68
public class SortUtil { Fh0cOp(
public final static int INSERT = 1; U\~9YX8
public final static int BUBBLE = 2; 4_&+]S
public final static int SELECTION = 3; oTLA&dy@
public final static int SHELL = 4; .m/$ku{/J
public final static int QUICK = 5; `j)S7KN
public final static int IMPROVED_QUICK = 6; L$rMfeS
public final static int MERGE = 7; ]R?{9H|jwE
public final static int IMPROVED_MERGE = 8; glo Y@k~
public final static int HEAP = 9; fqp!^-!X
i$CN{c*
public static void sort(int[] data) { gR\-%<42
sort(data, IMPROVED_QUICK); nEgDwJ<wl
} %TUvH>;0
private static String[] name={ M|DVFC
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 5%)<e-
}; mMSQW6~j
<g3)!VR^q
private static Sort[] impl=new Sort[]{ C(@#I7G
new InsertSort(), 4M,Q{G|e
new BubbleSort(), Z(c3GmY
new SelectionSort(), -{O>'9'1A
new ShellSort(), JVxGS{Z
new QuickSort(), lo< t5~GQ
new ImprovedQuickSort(), R.'-jvO
new MergeSort(), h}$g}f%$+
new ImprovedMergeSort(), lNRGlTD%
new HeapSort() SR8)4:aKW
}; Q!*}^W
|S0nR<x-M
public static String toString(int algorithm){ rK@XC +`S
return name[algorithm-1]; Vz @2_k
} vmsrypm
%pG^8Q()
public static void sort(int[] data, int algorithm) { c+A$ [
impl[algorithm-1].sort(data); 4-voR5Fd
} }"x#uG
]:_s7v
public static interface Sort { 8Z[YcLy"({
public void sort(int[] data); =9yh<'583
} T j(MIFi|5
Z`]r)z%f
public static void swap(int[] data, int i, int j) { ms%RNxU4:
int temp = data; hteAuz4H
data = data[j]; 4}xw&x
data[j] = temp; 2&o jQhe
} I6-.;)McO
} }N,$4h9Dj