[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; IP7j)SM!
} qc2j}D0
int i1=l; q,F\8M\$
int i2=mid+1; vm"LPwSk>
for(int cur=l;cur<=r;cur++){ c [sydl
if(i1==mid+1) UBzX%:A
data[cur]=temp[i2++]; Z,)4(#b =
else if(i2>r) ^=.R#zrc
data[cur]=temp[i1++]; \,ARYwd
else if(temp[i1] data[cur]=temp[i1++]; i#Io;
else m~'!
data[cur]=temp[i2++]; Yrs7F.Y"
} aY}:9qBice
} )=;GQ*<8Zs
Wf/r@/q
} f_Ma~'3
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改进后的归并排序: 3p6QJuSB
E;/WP!/.
package org.rut.util.algorithm.support; H?*EQK`7?0
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import org.rut.util.algorithm.SortUtil; B(7oHj.i2
8=CdO|XV
/** "3.v(GVr
* @author treeroot kd)Q$RA(
* @since 2006-2-2 >lQ@" U
* @version 1.0 c[J?`8
*/ gI "ZhYI
public class ImprovedMergeSort implements SortUtil.Sort { 4l7TrCB
bc=,$
private static final int THRESHOLD = 10; g5M=$y/H
$s+/OgG4H
/* r*HbglB
* (non-Javadoc) #%N v\g;
* p4GhT~)l:
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Z^E>)!t
*/ #V&98 F
public void sort(int[] data) { 3.@"GS#"[
int[] temp=new int[data.length]; m0QE S
mergeSort(data,temp,0,data.length-1); 6!zBLIYFI
} )12.W=p
q;Tdqv!Ju
private void mergeSort(int[] data, int[] temp, int l, int r) { WD# 96V
int i, j, k; +Ac.@!X}%
int mid = (l + r) / 2; ~k\Dde
if (l == r) }A jE- K{
return; vz5x{W
if ((mid - l) >= THRESHOLD) vF@hg)A
mergeSort(data, temp, l, mid); Wip@MGtJ
else E! d?@Xr@
insertSort(data, l, mid - l + 1); q\s"B.(G"
if ((r - mid) > THRESHOLD) 2 j.6
mergeSort(data, temp, mid + 1, r); :No`+X[Kq
else %jk7JDvl
insertSort(data, mid + 1, r - mid); ~hD!{([
n2}(Pt.
for (i = l; i <= mid; i++) { Z,zkm{9*
temp = data; }py)EI,U
} B-^r0/y;
for (j = 1; j <= r - mid; j++) { Zc9@G-
temp[r - j + 1] = data[j + mid]; Ak3cE_*Y/
} %O6r
int a = temp[l]; !yqez
int b = temp[r]; "Vh3hnS~
for (i = l, j = r, k = l; k <= r; k++) { \]C_ul'
if (a < b) { "uCO?hv0
data[k] = temp[i++]; -Vg(aD
a = temp; B@cC'F#G
} else { R!i\-C1 S
data[k] = temp[j--]; Hb}O/G$a*
b = temp[j]; fF6bEJl3
} /]j^a:#"6t
} !Gob `# r
} YP E1s
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/** 4>^LEp
* @param data Zt_~Zxn3
* @param l lXtsnQOOK
* @param i :o~]FVf
*/ aVB/CoM9
private void insertSort(int[] data, int start, int len) { $UNC0(4
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); mtU{d^B
} {zX]41T
} Fn>KdoByN
} ^'9.VVyz
} w*?SGW
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堆排序： Q,nJz*AJ
+3uPHpMB-
package org.rut.util.algorithm.support; T@wgWE<0y_
5{/uHscwLa
import org.rut.util.algorithm.SortUtil; Q XSS
ai%*s&0/Y
/** .;rE4B
* @author treeroot 6am g*=]
* @since 2006-2-2 _'8P8T&
* @version 1.0 J':X$>E|
*/ r[?GO"ej5
public class HeapSort implements SortUtil.Sort{ $RH.
GP>\3@>
/* (non-Javadoc) ;b{yu|
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) kEgpF{"%n
*/ clG@]<a`_
public void sort(int[] data) { 7|5X> yt
MaxHeap h=new MaxHeap(); Ii9[[I
h.init(data); Ff{,zfN+3
for(int i=0;i h.remove(); BLN|QaZ
System.arraycopy(h.queue,1,data,0,data.length); +m9ouF
} }!Y=SP1e
N5[^W`Qf
private static class MaxHeap{ HQvJ*U4++
pMHF u/|Pr
void init(int[] data){ z$gtGrU
this.queue=new int[data.length+1]; kmUL^vF
for(int i=0;i queue[++size]=data; l+#J oc<8
fixUp(size); 0iYo&q'n
} _01wRsm%2
} nb<e<>L
80zpRU"
private int size=0; #x qiGK
]_BH"ng}
private int[] queue; Q,K$)bM
=t^jlb
public int get() { O1D|T"@
return queue[1]; rFUR9O.{E
} G9^xv
vgE -t
public void remove() { )I#{\^
SortUtil.swap(queue,1,size--); mC0_rN^Aj
fixDown(1); -"NK"nb
} #c!rx%8I
file://fixdown Lqdapx"Z_
private void fixDown(int k) { }DQTy.d;P
int j; qJ sH
while ((j = k << 1) <= size) { -Bl]RpHCe
if (j < size %26amp;%26amp; queue[j] j++; lA%FS]vh
if (queue[k]>queue[j]) file://不用交换 | C^.[)
break; Jd^Lnp6?
SortUtil.swap(queue,j,k); T|8:_4/l
k = j; @@j:z;^|
} "OwK-
} ]5K+W
private void fixUp(int k) { s+~GQcj<T
while (k > 1) { )=#e*1!b
int j = k >> 1; Esu{c9,
if (queue[j]>queue[k]) j]FK.G'
break; "fr{:'HX
SortUtil.swap(queue,j,k); =z;]FauR!
k = j; RL:B.Lv/W
} O6/:J#X%
} ;yajt\a
/oW]? 9
} DK eB%k
iO&*WIbg
} #i.,+Q
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SortUtil： IU<lF)PF$
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package org.rut.util.algorithm; 8v z h5,U
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import org.rut.util.algorithm.support.BubbleSort; k3H0$1
import org.rut.util.algorithm.support.HeapSort; d<+hQ\BF,
import org.rut.util.algorithm.support.ImprovedMergeSort; w >2sr^!y
import org.rut.util.algorithm.support.ImprovedQuickSort; |.,]0CRg
import org.rut.util.algorithm.support.InsertSort; pHuR_U5*?
import org.rut.util.algorithm.support.MergeSort; ^B0Qk:%P^N
import org.rut.util.algorithm.support.QuickSort; t7l{^d_L
import org.rut.util.algorithm.support.SelectionSort; 5F+G8
import org.rut.util.algorithm.support.ShellSort; T60pw
jz`3xFy *]
/** 7Q]c=i cg
* @author treeroot `LNhamp
* @since 2006-2-2 "w$,`M?2
* @version 1.0 ]=VRct "
*/ ^*i0~_
public class SortUtil { e'>q( B
public final static int INSERT = 1; :_y!p
public final static int BUBBLE = 2; N2k<W?wQ
public final static int SELECTION = 3; ^D5Jqh)
public final static int SHELL = 4; pmUf*u-
public final static int QUICK = 5; =Q{?!
public final static int IMPROVED_QUICK = 6; q\}+]|nGs
public final static int MERGE = 7; {g#4E0.A!
public final static int IMPROVED_MERGE = 8; H0#=oJr$)W
public final static int HEAP = 9; ]iGeqwT
;1[Z&Uv8
public static void sort(int[] data) { 3rB0H
sort(data, IMPROVED_QUICK); ,,BP}f+l$
} =/_uk{
private static String[] name={ l 9 wO x
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" yhYF "~CM
}; ,[IDC3.4^R
FLs$
private static Sort[] impl=new Sort[]{ e*qGrg(E
new InsertSort(), M,S'4Szuk
new BubbleSort(), $%q=tn'EX
new SelectionSort(), nX 9]dz
new ShellSort(), (5 @H
new QuickSort(), ;xe.0j0h
new ImprovedQuickSort(), BO#tn{(#
new MergeSort(), c\2rKqFD8
new ImprovedMergeSort(), (T0MWp0
new HeapSort() PBnH#zm
}; /ZD6pF
2?GMKd)
public static String toString(int algorithm){ }mXYS|{
return name[algorithm-1]; GkX Se)#p
} ('SId@
Qw:!Rw,x
public static void sort(int[] data, int algorithm) { E0R6qS:'
impl[algorithm-1].sort(data); >> "gb/x,
} \?>M?6D
Oo@o$\+v
public static interface Sort { i4,p\rE0
public void sort(int[] data); BH1h2OEe#
} w^ut,`yWR
oR&z,%0wMK
public static void swap(int[] data, int i, int j) { sa4w.9O1GS
int temp = data; J6n>{iE
data = data[j]; T"[]'|'
data[j] = temp; $GFR7YC 7
} fE+zA)KX
} ;5bd<N