[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; X"vDFE`?
} 5`@yX[G
int i1=l; 3,EtyJ3[Bh
int i2=mid+1; na*Z0y
for(int cur=l;cur<=r;cur++){ \TYVAt] ?
if(i1==mid+1) _DAqL@5n
data[cur]=temp[i2++]; 1;PI%++
else if(i2>r) 97 ,Yq3
data[cur]=temp[i1++]; -?l`LbD
else if(temp[i1] data[cur]=temp[i1++]; @-Y,9mM
else }u8g7Nj
data[cur]=temp[i2++]; @REMl~"D5
} 5(GVwv
} :;c`qO4
2a;[2':
} W7;RQ
'v@*xF/L6a
改进后的归并排序: YI;MS:Qj
`4?|yp.|L
package org.rut.util.algorithm.support; >3*a&_cI=k
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import org.rut.util.algorithm.SortUtil; JNT|h zV
F@HJ3O9
/** |tU wlc>
* @author treeroot w+Gav4
* @since 2006-2-2 2R ^6L@fw
* @version 1.0 0|i|z!N>
*/ _T7XCXEk
public class ImprovedMergeSort implements SortUtil.Sort { }346uF7C
UkXa mGoy3
private static final int THRESHOLD = 10; e+<|
]826kpq_
/* j<6+p r
* (non-Javadoc) F>5b[q6~4
* g[HuIn/
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) J qmL|S)
*/ ggrkj0
public void sort(int[] data) { lIZ&' z
int[] temp=new int[data.length]; Jl6lZd(Np
mergeSort(data,temp,0,data.length-1); dt>9mF q
} ^w&!}f+
TA8
private void mergeSort(int[] data, int[] temp, int l, int r) { OOXP1L
int i, j, k; -%Ce
int mid = (l + r) / 2; +G\i$d;St
if (l == r) |f\WVGH
return; KV-h~C
if ((mid - l) >= THRESHOLD) 4#.Q|vyl]"
mergeSort(data, temp, l, mid); ^N7 C/" p
else *=!r|UdB.
insertSort(data, l, mid - l + 1); 2aX{r/Lc
if ((r - mid) > THRESHOLD) )=bW\=[8
mergeSort(data, temp, mid + 1, r); (^B=>
else ?>I
insertSort(data, mid + 1, r - mid); V6h8+|hK
ks %arm&
for (i = l; i <= mid; i++) { r:Q=6j,
temp = data; -3y
} V#+F*w?&D
for (j = 1; j <= r - mid; j++) { VS!v7-_N5
temp[r - j + 1] = data[j + mid]; I~Qi):&x
} c4r9k-w0E
int a = temp[l]; 1~},}S]id
int b = temp[r]; OF)*kiJ
for (i = l, j = r, k = l; k <= r; k++) { [Q\(kd*4
if (a < b) { 3xmPY.
data[k] = temp[i++]; `I4E': ZG
a = temp; F~hH>BH9
} else { *cCj*Zr]
data[k] = temp[j--]; kY6_n4
b = temp[j]; 'cAS>s"$}V
} ;j[:tt\k
} 9'e<{mlM
} s?&S<k-=fr
B/^o$i
/** :Bu)cy#/[
* @param data sY?wQ:
* @param l rx@i.+
* @param i ZG{#CC=
*/ O3%#Q3c>3
private void insertSort(int[] data, int start, int len) { fZLAZMrM
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 8<32(D{
} E1`_[=8a9
} !&`\MD>;~R
} e**'[3Y
} *65~qAd
z]LVq k
堆排序： 0I do_V
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package org.rut.util.algorithm.support; 83p8:C.Ze
F1L[C4'
import org.rut.util.algorithm.SortUtil; N3a ]!4Y\
)K`tnb.Pf
/** LyR<cd$W
* @author treeroot y\[* mgl:
* @since 2006-2-2 ,2i1 4H
* @version 1.0 Tj\hAcD
*/ Fg}t{e]3a
public class HeapSort implements SortUtil.Sort{ ]scr@e
'A\0^EvVv
/* (non-Javadoc) O*B9Bah
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) J4z&J SY
*/ Dkh=(+> <
public void sort(int[] data) { x9 n(3Oa
MaxHeap h=new MaxHeap(); - DYH>!
h.init(data); vQy<%[QO
for(int i=0;i h.remove(); tw.z5
System.arraycopy(h.queue,1,data,0,data.length); >IA1 \?(
} @+)T"5_Y[
]1|7V|N6
private static class MaxHeap{ \q24E3zS&
tK'9%yA\
void init(int[] data){ qSD3]Dv"
this.queue=new int[data.length+1]; B<$6Dj%L
for(int i=0;i queue[++size]=data; -%K}~4J
fixUp(size); &%k_BdlkQ
} St> E\tXp
} Goy[P2m
RyM29uD
private int size=0; IjQgmS~G
FL&Y/5
private int[] queue; =^l`c$G<
hhI*2|i"L
public int get() { Gl6:2
return queue[1]; ]"YXa~b
} w{;~
|lu@rN
public void remove() { =}u?1~V
SortUtil.swap(queue,1,size--); i.eMrzJ|
fixDown(1); O'.{6H;t
} S&k/Pc
file://fixdown oYJ<.Yxeb
private void fixDown(int k) { </SO#g^r<
int j; kE!ky\E
while ((j = k << 1) <= size) { +%~me?
if (j < size %26amp;%26amp; queue[j] j++; sEZ2DnDI
if (queue[k]>queue[j]) file://不用交换 |?MD>Pez
break; A@4{-e\
SortUtil.swap(queue,j,k); JRE\R&>g
k = j; nr(C*E
} -~H "zu`
} ymnK`/J!Q
private void fixUp(int k) { FP0GE
while (k > 1) { g:p`.KuB
int j = k >> 1; +JXn
if (queue[j]>queue[k]) A_2lG!! 6
break; v;}MHl
SortUtil.swap(queue,j,k); CP$,fj
k = j; ~3-+~y=o~
} ?[WUix;
} -yu$Mm
k)8*d{*
} YfseX;VX
)|5mW
} D4$"02"
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SortUtil： l <Z7bo
M-F{I%Vx
package org.rut.util.algorithm; KF!d?
iV\*7
import org.rut.util.algorithm.support.BubbleSort; L}A2$@
import org.rut.util.algorithm.support.HeapSort; -$@'@U
import org.rut.util.algorithm.support.ImprovedMergeSort; hQNUA|Q=%
import org.rut.util.algorithm.support.ImprovedQuickSort; +apn3\_
import org.rut.util.algorithm.support.InsertSort; :3J`+V}9;
import org.rut.util.algorithm.support.MergeSort; rsw=a_S
import org.rut.util.algorithm.support.QuickSort; x8wsx F
import org.rut.util.algorithm.support.SelectionSort; w^7[4u4
import org.rut.util.algorithm.support.ShellSort; X76rme
_6]CT0
/** -&)
* @author treeroot ,zJ:a>v
* @since 2006-2-2 -b?s\X
* @version 1.0 hQvI}
*/ V{\1qg{
public class SortUtil { T$;BZ=_
public final static int INSERT = 1; M~Er6Zg
public final static int BUBBLE = 2; }wJH@'0+
public final static int SELECTION = 3; 0wF)bQv1
public final static int SHELL = 4; GW7+#
public final static int QUICK = 5; X]\; f
public final static int IMPROVED_QUICK = 6; E%Ko[G
public final static int MERGE = 7; fj9&J[
public final static int IMPROVED_MERGE = 8; bz [?M}
public final static int HEAP = 9; BgB0
[g=4'4EZc
public static void sort(int[] data) { 8MBY3F
sort(data, IMPROVED_QUICK); wARd^Iw
} Kv#Q$$)r
private static String[] name={ `nc=@" 1
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 5B3sRF}
}; :SZi4:4-J8
i.FdZN{
private static Sort[] impl=new Sort[]{ xsvJjs;=
new InsertSort(), V,?])=Ax
new BubbleSort(), DV*e.Y>
new SelectionSort(), y`7b3*P
new ShellSort(), -afNiNiY
new QuickSort(), q!Z{qt*`um
new ImprovedQuickSort(), u_o]\D~
new MergeSort(), L/5th}m
new ImprovedMergeSort(), uNqN &7g
new HeapSort() BXytAz3
}; /NuO>kQa
k? ,/om1
public static String toString(int algorithm){ U_UN& /f
return name[algorithm-1]; Ksk[sf?J&
} [3x*47o"z
20:![/7:!
public static void sort(int[] data, int algorithm) { <" 0b8 Z
impl[algorithm-1].sort(data); P#rS.CIh
} X'xnJtk
QVl"l'e8
public static interface Sort { _!?a9
public void sort(int[] data); iWkC:fQz
} '+*'sQvH[
x}{O9LiR
public static void swap(int[] data, int i, int j) { sy6[%8D$
int temp = data; 2cZgG^
data = data[j]; ajf(Ii\/
data[j] = temp; Pv*]AF;9pQ
} O6">Io5
} :1v.Jk