[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; 3-_4p8OK
} iOD9lR`s
int i1=l; My5X%)T>P
int i2=mid+1; + ^~n09
for(int cur=l;cur<=r;cur++){ NGb`f-:jw
if(i1==mid+1) 3HfT9
data[cur]=temp[i2++]; A)VOv`U@2
else if(i2>r) s!UC{)g,
data[cur]=temp[i1++]; a_Xh(d$
else if(temp[i1] data[cur]=temp[i1++]; BKJW\gS2
else I:Z38xz-[
data[cur]=temp[i2++]; geT<vh Z6
} qP]Gl--q{
} Wc+ e>*
\w`Il"}V
} L-=^GNh
@Yt[%tOF+
改进后的归并排序: 'rd{fe_g!
9N-mIGJ
package org.rut.util.algorithm.support; r2H]n.MT
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import org.rut.util.algorithm.SortUtil; XFM6.ye
gE8>5_R|
/** \WZ00Y,*
* @author treeroot Ho\z^w+T`
* @since 2006-2-2 f)gA.Rz
* @version 1.0 7eu7ie6
*/ rKR<R(=!=
public class ImprovedMergeSort implements SortUtil.Sort { iaPY>EP1
1L^\TC
private static final int THRESHOLD = 10; 6Lz&"C,`
GL (YC-{
/* i;Gl-b\_h
* (non-Javadoc) WI~';dK2]
* m2\ZnC
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) T\2cAW5
*/ k.0$~juu
public void sort(int[] data) { ,!Ah+x
int[] temp=new int[data.length]; JqFFI:Q5a
mergeSort(data,temp,0,data.length-1); *a\1*Jk
} Ak|jJ
od-N7lp#
private void mergeSort(int[] data, int[] temp, int l, int r) { ];(w8l
int i, j, k; ~9x$tb x-
int mid = (l + r) / 2; CJ%7M`zy
if (l == r) ;:'A{&0N
return; -KOE2f
if ((mid - l) >= THRESHOLD) 9I.="b=J)
mergeSort(data, temp, l, mid); +/AW6
else wn|Sdp
insertSort(data, l, mid - l + 1); YZ'gd10T
if ((r - mid) > THRESHOLD) uv._N6mj
mergeSort(data, temp, mid + 1, r); @'~v~3 $S
else %hOe `2#$
insertSort(data, mid + 1, r - mid); 4.R >mN[
l$.C40v
for (i = l; i <= mid; i++) { -w^E~J0*L
temp = data; 7FfzMs[\e
} 'N'EC`R
for (j = 1; j <= r - mid; j++) { OSsdB%bIu`
temp[r - j + 1] = data[j + mid]; s{hJ"lv:
} u'P@3'P
int a = temp[l]; "EHwv2Hm>
int b = temp[r]; Hz+edMUL
for (i = l, j = r, k = l; k <= r; k++) { !a4pKN`qLY
if (a < b) { e|xRK?aVBu
data[k] = temp[i++]; uiO8F*,!&r
a = temp; !=eui$]
} else { 8CwgV
data[k] = temp[j--]; m<TKy_C`
b = temp[j]; 8"RX~Igf
} )*$'e<?`
} L?<V KT
} -*+7-9A I
-:>Mi5/ s
/** 8 w^i
* @param data dN;C-XF3s
* @param l 62a{Ggs{
* @param i Tig`4d-%
*/ 57rc|]C
private void insertSort(int[] data, int start, int len) { </Q<*@p?
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 8@Y]dzgjj
} ,Cde5A{K
} W 4~a`D7
} F0]NtKaH
} .kGg}
(4x`/
堆排序： FL"7u2rh,
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package org.rut.util.algorithm.support; SUHyg/|F
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import org.rut.util.algorithm.SortUtil; op/|&H'
G-9]z[\#
/** >o%.`)Ar
* @author treeroot _}{C?611c
* @since 2006-2-2 Rw=gg>\
* @version 1.0 W=%}~7*
*/ sHmzwvpLA
public class HeapSort implements SortUtil.Sort{ g]N!_Ib/!
~bg?V0
/* (non-Javadoc) +Ae4LeVzc
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) gb(a`
*/ GUJx?V/[
public void sort(int[] data) { J*5)g
MaxHeap h=new MaxHeap(); yM=%a3
h.init(data); K;k&w; j
for(int i=0;i h.remove(); q%2cx@c
System.arraycopy(h.queue,1,data,0,data.length); \l"1Io=
} o{37}if
Qis[j-?:
private static class MaxHeap{ bb}|"m.
Uf1i"VY
void init(int[] data){ :Fm;0R@/k
this.queue=new int[data.length+1]; ~K&ko8
for(int i=0;i queue[++size]=data; vB hpD
fixUp(size); U4w^eWzP
} !Z3iu
} {D={>0
2I3MV:5
private int size=0; @6~r7/WD
[z'PdYQR/{
private int[] queue; g+bc4eU
<]2X~+v
public int get() { F\^9=}b_i
return queue[1]; {U=Mfo?AH
} V\5ZRLawP
f!|7j}3
public void remove() { Z@4BTA
SortUtil.swap(queue,1,size--); Y`eUWCD
fixDown(1); w@ALl#z;}
} )*}2L_5]
file://fixdown 7_xQa$U[
private void fixDown(int k) { [K1RP.
int j; V^sZXdDNL
while ((j = k << 1) <= size) { IH(]RHTp%
if (j < size %26amp;%26amp; queue[j] j++; "j#;MOK
if (queue[k]>queue[j]) file://不用交换 yU<T_&M
break; 4! ]28[2B6
SortUtil.swap(queue,j,k); <$7HX/P
k = j; |=&[sC
} O10,h(O
} D"UCe7
private void fixUp(int k) { JVy-Y
while (k > 1) { Gi]R8?M
int j = k >> 1; _Vul9=
if (queue[j]>queue[k]) kG 7]<^Os3
break; 9ozN$:
SortUtil.swap(queue,j,k); }TfZ7~o[
k = j; O~D>F*_^j
} rWsUWA T*
} =]i[gs)B
V9 Z
} !6.}{6b
;:nx6wi
} 36iDiT_
jiw5>RNt
SortUtil： H%y!lR{c^D
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package org.rut.util.algorithm; b`:n i
'9@} =pE
import org.rut.util.algorithm.support.BubbleSort; &q8oalh
import org.rut.util.algorithm.support.HeapSort; 'y_<O|-
import org.rut.util.algorithm.support.ImprovedMergeSort; K X0{dizZ
import org.rut.util.algorithm.support.ImprovedQuickSort; X^Dklqqy
import org.rut.util.algorithm.support.InsertSort; `_"F7Czn
import org.rut.util.algorithm.support.MergeSort; EH1GdlhA
import org.rut.util.algorithm.support.QuickSort; qrdA4S
import org.rut.util.algorithm.support.SelectionSort; vNo(`~]c
import org.rut.util.algorithm.support.ShellSort; tE=;V) %we
)c432).Z
/** f)'mpp^
* @author treeroot L F<{/c9,
* @since 2006-2-2 Hst]}g' .
* @version 1.0 oJ4OVfknD
*/ QT`|"RI%
public class SortUtil { }(MI}o}
public final static int INSERT = 1; *m$lAWB5D
public final static int BUBBLE = 2; {"e)Jj_=
public final static int SELECTION = 3; <?8aM7W7
public final static int SHELL = 4; kn5X:@{
public final static int QUICK = 5; P6G&3yPt
public final static int IMPROVED_QUICK = 6; 1 >}x9D
public final static int MERGE = 7; 9szUN;:ZZ
public final static int IMPROVED_MERGE = 8; Ij w{g%
public final static int HEAP = 9; (Mzv"FN]
Hs6?4cgj
public static void sort(int[] data) { l4O&*,}l##
sort(data, IMPROVED_QUICK); Gn?NY}.S
} Q{K'#
private static String[] name={ 'GyO
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Xg4iH5!E
}; uT :Yh6
.Tm m
private static Sort[] impl=new Sort[]{ H\vd0DD;
new InsertSort(), e #!YdXSx
new BubbleSort(), i$?$X,
new SelectionSort(), mG\$W#+j
new ShellSort(), Sdo mG?;kV
new QuickSort(), vw
new ImprovedQuickSort(), 'r0kX||
new MergeSort(), %$Smei
new ImprovedMergeSort(), WPu-P
new HeapSort() ko-,l6E
}; {wL30D^
xCTPsw]s
public static String toString(int algorithm){ Tf*DFyr
return name[algorithm-1]; j0wpaIp
} .Ld{QPa
y&&%%3
public static void sort(int[] data, int algorithm) { cfZ$V^xM
impl[algorithm-1].sort(data); uyqu n@q
} wJAJ /
fHV%.25
public static interface Sort { o)]mJb~XG-
public void sort(int[] data); VzTHW5B
} m%s&$
`qs[a}%'>"
public static void swap(int[] data, int i, int j) { iwVsq_[]L
int temp = data; 63PSYj(y
data = data[j]; A||,|He~
data[j] = temp; =bHS@h8N<
} YQ-!>3/)-
} C{<H)?]*BF