[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; c8@zpkMj/
} m'j]T/WF
int i1=l; t>~a/K"
int i2=mid+1; ?2RDd|#
for(int cur=l;cur<=r;cur++){ d*}dM"
if(i1==mid+1) ?.A~O-w
data[cur]=temp[i2++]; vZ&{
else if(i2>r) @Rc/^B:
data[cur]=temp[i1++]; RWX?B
else if(temp[i1] data[cur]=temp[i1++]; H}ie D"T_
else ApT8;F B
data[cur]=temp[i2++]; }|KNw*h$
} ,$H[DX
} /i[1$/*
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改进后的归并排序: 6bE~m<B\`
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package org.rut.util.algorithm.support; ep,"@,,
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import org.rut.util.algorithm.SortUtil; EF8~rKO3
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/** 0%W0vTvL
* @author treeroot s7789pR
* @since 2006-2-2 )j_Y9`R
* @version 1.0 KUE}^/%z
*/ j#f7-nHyz8
public class ImprovedMergeSort implements SortUtil.Sort { f[XsnN2
.Fl5b}C(
private static final int THRESHOLD = 10; ((AsZ$[S
"0V8i%a
/* ;_nV*G.y#^
* (non-Javadoc) > &VY
* ([#4H3uO-
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,q".d =6
*/ l&2pUv=
public void sort(int[] data) { s?9$o Qq1
int[] temp=new int[data.length]; ~%D=\iE
mergeSort(data,temp,0,data.length-1); 'CfM'f3uu
} aCZ7G %Y
Z/*X)mBuB
private void mergeSort(int[] data, int[] temp, int l, int r) { LJh^-FQ
int i, j, k; Y+ Qm.
int mid = (l + r) / 2; 4k]DktY}.
if (l == r) V."qxKsz
return; qt.Y6s:r_
if ((mid - l) >= THRESHOLD) gP^p7aYwn
mergeSort(data, temp, l, mid); .S6u{B
else /ygC_,mx
insertSort(data, l, mid - l + 1); C4h4W3w
if ((r - mid) > THRESHOLD) aj|gt
mergeSort(data, temp, mid + 1, r); |'SgGg=E
else xE"QX N
insertSort(data, mid + 1, r - mid); BXxl-x
TNj WZ
for (i = l; i <= mid; i++) { 713)D4y}
temp = data; |EpL~G_
} \)/dFo\l
for (j = 1; j <= r - mid; j++) { wc~k4B9"
temp[r - j + 1] = data[j + mid]; 7.!`c-8 u
} An2Wj
int a = temp[l]; VM"z6@
int b = temp[r]; NNTUl$
for (i = l, j = r, k = l; k <= r; k++) { T/YvCbo
if (a < b) { J12hjzk6@
data[k] = temp[i++]; g-O}e4
a = temp; %{j)w{ LJ
} else { D/<;9hw
data[k] = temp[j--]; S>N/K
b = temp[j]; Rct=vDU
} l6y*SW5+
} KU5|~1t 4
} p(`?y:.3
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/** 5IfyD ]<
* @param data U%zZw)
* @param l c_+y~X)i
* @param i RLL2'8"A
*/ jxdxIkAHZc
private void insertSort(int[] data, int start, int len) { 7O^'?L<C'
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); )gb gsQZ
} N8K @ch3=P
} /4_^'RB
} \UR/tlw+/
} aa10vV
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堆排序： 6d%'>^`(o-
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package org.rut.util.algorithm.support; <-%OXEG
7$HN5T\!
import org.rut.util.algorithm.SortUtil; P3u,)P&
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/** [7|j:!
* @author treeroot { kF"<W
* @since 2006-2-2 szG0?e
* @version 1.0 *LZ^0c:r
*/ vi-mn)L6#
public class HeapSort implements SortUtil.Sort{ Qin;{8I0
[bIR$c[G
/* (non-Javadoc) S`v+rQjW
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) FaVeP%v
*/ 5Z@~d'D
public void sort(int[] data) { 'D1Sm&M2%e
MaxHeap h=new MaxHeap(); :!nBTw
h.init(data); QZ:xG:qyk;
for(int i=0;i h.remove(); w\f>.N
System.arraycopy(h.queue,1,data,0,data.length); kV$$GLD\
} Ohe*m[
WG\gf\=I
private static class MaxHeap{ F>!gwmn~
X&+*?Q^
void init(int[] data){ $,v[<T`
this.queue=new int[data.length+1]; Bx&F*a;5
for(int i=0;i queue[++size]=data; Ag#o&Y
fixUp(size); 8ta`sNy9
} R]8^ @i1
} ( 8}'JvSu
u>U4w68
private int size=0; |Vq&IfP
lAcXi$pF
private int[] queue; f}_d`?K
v!b 8_0~u6
public int get() { yxpDQO~x
return queue[1]; 7vf?#^RlV
} b}OOG
Pa}B0XBWP
public void remove() { LtDQgel"
SortUtil.swap(queue,1,size--); pHpHvSI
fixDown(1); _o-lNt+
} :a#pzEK
file://fixdown u|'}a3
private void fixDown(int k) { *w[\(d'T
int j; J|D$
while ((j = k << 1) <= size) { ZKT~\l
if (j < size %26amp;%26amp; queue[j] j++; $4j$c|S!
if (queue[k]>queue[j]) file://不用交换 Q'mLwD3>
break; y_Tc$g~
SortUtil.swap(queue,j,k); S5$sB{\R
k = j; `AO<r
} ,& ^vc_}
} (3;dtp>Xx
private void fixUp(int k) { xWa96U[
while (k > 1) { +uY)MExs2
int j = k >> 1; <\If:
if (queue[j]>queue[k]) 1p[Z`m*9
break; @/m|T]'8
SortUtil.swap(queue,j,k); s, 8a1o
k = j; s.)nS$
} u VZouw#
} 8sV_@<l<X
ZPISclSA+
} q~K KN /N
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} d5x>kO'[l
3N]
SortUtil： %!>~2=Q2*
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package org.rut.util.algorithm; J}035
RNJUA^{
import org.rut.util.algorithm.support.BubbleSort; f#W5Nu'*!
import org.rut.util.algorithm.support.HeapSort; DjX*2O
import org.rut.util.algorithm.support.ImprovedMergeSort; x\ pC&
import org.rut.util.algorithm.support.ImprovedQuickSort; v.ftfL!
import org.rut.util.algorithm.support.InsertSort; ,;2x.We
import org.rut.util.algorithm.support.MergeSort; _(q|W3
import org.rut.util.algorithm.support.QuickSort; gD\ =
import org.rut.util.algorithm.support.SelectionSort; G\?q{
import org.rut.util.algorithm.support.ShellSort; ZN:~etd
/ xfg4
/** v=~=Q*\l
* @author treeroot `Xbk2KD p
* @since 2006-2-2 $:YJ<HvG<
* @version 1.0 y'9 bs
*/ &m'ttUG?
public class SortUtil { :V%XEN)
public final static int INSERT = 1; ?Q< o-o;B
public final static int BUBBLE = 2; :PrQ]ss@C5
public final static int SELECTION = 3; |Q'l&Gt6
public final static int SHELL = 4; nj7wc9z4
public final static int QUICK = 5; zaix_mR
public final static int IMPROVED_QUICK = 6; QX*HvT
public final static int MERGE = 7; mv1_vF:
public final static int IMPROVED_MERGE = 8; ZjE!? '(ef
public final static int HEAP = 9; 0#}@-e
@+v;B:
public static void sort(int[] data) { 8%UI<I,
sort(data, IMPROVED_QUICK); SOyE$GoOsx
} b ;Vy=f
private static String[] name={ +M+ht
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" "e4hPY#
}; iB Ld*B|#K
):. +u=
private static Sort[] impl=new Sort[]{ X5'QYZ6kv
new InsertSort(), U20G{%%
new BubbleSort(), $lj1924?^
new SelectionSort(), u3 mTsq!
new ShellSort(), o9!DK
new QuickSort(), UQwLAXs
new ImprovedQuickSort(), hi>sDU<x
new MergeSort(), <}c`jN!z.
new ImprovedMergeSort(), <y(uu(c
new HeapSort() Fejs9'cB
}; bF88F_
'"H'#%RU
public static String toString(int algorithm){ QD0upYG
return name[algorithm-1]; Y&O<A8=8
} I9ga8mG4-'
XD5z+/F<"0
public static void sort(int[] data, int algorithm) { lE+v@Kb:
impl[algorithm-1].sort(data); V`KXfY
} =OIxG}*
7XE/bhe%S
public static interface Sort { "}i\"x;s
public void sort(int[] data); Go}C{(4T
} ~M 6^%
*/Oq$3QGsV
public static void swap(int[] data, int i, int j) { M"OXNPkc
int temp = data; V4GcW|P4y
data = data[j]; $=f,z>j
data[j] = temp; 5$Yt@8;
} Aw)='&;^z
} R$@|t?