[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; &|4Uo5qS=Z
} LNb![Rq
int i1=l; E6gEP0b
int i2=mid+1; 2uTa}{/%
for(int cur=l;cur<=r;cur++){ ww2Qa-K
if(i1==mid+1) Ss:,#|
data[cur]=temp[i2++]; ?uN(" I
else if(i2>r) )-{~7@yqZ
data[cur]=temp[i1++]; xRUYJ=|oh
else if(temp[i1] data[cur]=temp[i1++]; >KPJ74R
else ]4yvTP3[Rm
data[cur]=temp[i2++]; X3nhqQTZ
} g2]-Q.
} O /&%`&2
$5IrM7i
} QhUraZ
@FV;5M:I
改进后的归并排序: v\eBL&WK
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package org.rut.util.algorithm.support; Zy%Z]dF
yDC97#%3u
import org.rut.util.algorithm.SortUtil; ,Aii>D]
Uk9g^\H<D
/** GP$Y4*y/
* @author treeroot #77UKYj2L-
* @since 2006-2-2 NjxW A&[ng
* @version 1.0 m+UdT854
*/ g@k9w{_
public class ImprovedMergeSort implements SortUtil.Sort { (ZK >WoV
xNkY'4%
private static final int THRESHOLD = 10; \7/_+)0}'
G= cxc_9
/* l/^-:RRNKi
* (non-Javadoc) A&F4;>dms
* Y zS*p~|
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) mmL~`i/
*/ ;Y^RF?un
public void sort(int[] data) { 81cmG`G7
int[] temp=new int[data.length]; q1Sm#_7
mergeSort(data,temp,0,data.length-1); }D+8K
} )mdNvb[*n
];;w/$zke
private void mergeSort(int[] data, int[] temp, int l, int r) { [u80-x<
int i, j, k; T6$<o\g'
int mid = (l + r) / 2; cloI 6%5r
if (l == r) ~PnpYd<2
return; J"rwWIxO*
if ((mid - l) >= THRESHOLD) uN 62>
mergeSort(data, temp, l, mid); ?<'W~Rm6n
else % eRwH >
insertSort(data, l, mid - l + 1); J36@Pf]h
if ((r - mid) > THRESHOLD) S(i(1Hs.
mergeSort(data, temp, mid + 1, r); sV[Z|$&Z
else Xb*_LZAU
insertSort(data, mid + 1, r - mid); h\d($Ki
M[u3]dN
for (i = l; i <= mid; i++) { 4d G-
temp = data; "S`wwl
} vs|6ww
for (j = 1; j <= r - mid; j++) { ;;!{m(;LS}
temp[r - j + 1] = data[j + mid]; k+$4?/A
} PAV2w_X~
int a = temp[l]; ~iZF~PQ1_
int b = temp[r]; HDyZzjgG
for (i = l, j = r, k = l; k <= r; k++) { \STvBI?
if (a < b) { Qu FCc1Q
data[k] = temp[i++]; vXyo
a = temp; f+Medc~
} else { W;dzLgc
data[k] = temp[j--]; 2gAdZE&Y
b = temp[j]; FM"BTA:C
} ~#_$?_/(
} lMez!qx,=
} 5,BkwAr+6[
y=xe<#L
/** g/Jj]X#r
* @param data OIty ]c
* @param l H)T# R?
* @param i 9~'Ip7X,!
*/ */dh_P<Yj
private void insertSort(int[] data, int start, int len) { "Vp:z V<S
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); -!G#")<
} -^Km}9g
} `AHNk7 t=
} Z?c=t-yqp
} X1[R*a/p
B9)qv>m
堆排序： p]|ME
1=5'R/k
package org.rut.util.algorithm.support; zRoEx1
vKf;&`^qE
import org.rut.util.algorithm.SortUtil; GnrW{o
"rDzrz
/** }_:#fE
* @author treeroot 'Oy5G7^R
* @since 2006-2-2 {R!TUQ5
* @version 1.0 T>Rf?%o
*/ 5uJP)S?
public class HeapSort implements SortUtil.Sort{ .Xz"NyW
#u5;utY:F
/* (non-Javadoc) S%s|P=u
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) \BcJDdL
*/ ]AA*f_!
public void sort(int[] data) { 2a(yR>#
MaxHeap h=new MaxHeap(); Ldj^O9p(
h.init(data); 2]RH)W86;
for(int i=0;i h.remove(); IcA\3j
System.arraycopy(h.queue,1,data,0,data.length); bc=u1=~w
} ~K#_'Ldrd
f.84=epv
private static class MaxHeap{ xiOrk
qMdtJ(gq
void init(int[] data){ *o\Y~U-so
this.queue=new int[data.length+1]; dms:i)L2
for(int i=0;i queue[++size]=data; zV(tvt
fixUp(size); i~Ob( YIH
} 2N8sq(LK{
} <\9Ijuq}k
\ NSw<.
private int size=0; ~v(M6dz~vk
3g#=sd!0O@
private int[] queue; =']};
9Bvn>+_K
public int get() { C`~4q<W'
return queue[1]; F;&fx(
} sEJ;t0.LX
-anFt+f-
public void remove() { dYew7
SortUtil.swap(queue,1,size--); (zro7gKked
fixDown(1); ?r'TH/>
} (VXx G/E3
file://fixdown -k[tFBlw
private void fixDown(int k) { e5>5/l]jsg
int j; v6DxxE2n
while ((j = k << 1) <= size) { U>B5LU9&
if (j < size %26amp;%26amp; queue[j] j++; k5%0wHpk=
if (queue[k]>queue[j]) file://不用交换 MV;Y?%>
break; UFIAgNKl
SortUtil.swap(queue,j,k); D7_Hu'y<o
k = j; Jn@Mbl
} cM<hG:4%wX
} voej ~z+
private void fixUp(int k) { CWe>jlUQ
while (k > 1) { Zc\h15+P
int j = k >> 1; 0O['-x
if (queue[j]>queue[k]) Jyz$&jqyr'
break; L3=YlX`UL
SortUtil.swap(queue,j,k); uM#U!
k = j; J,0WQQnb
} q%kj[ZOY$]
} 7MuK/q.
o!l3.5m2d
} Xm^h5jAr
_Dcc<-.
} sg6w7fp>
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SortUtil： k"^t?\Q%vI
.M53, 8X
package org.rut.util.algorithm; &b@!DAwAJ
9p\wTzA
import org.rut.util.algorithm.support.BubbleSort; 1nlE3Y?AV
import org.rut.util.algorithm.support.HeapSort; 3e!Yu.q:
import org.rut.util.algorithm.support.ImprovedMergeSort; peTO-x^a-
import org.rut.util.algorithm.support.ImprovedQuickSort; fCt\2);a
import org.rut.util.algorithm.support.InsertSort; djy:
import org.rut.util.algorithm.support.MergeSort; leb^,1/D6
import org.rut.util.algorithm.support.QuickSort; zmL~]!~&
import org.rut.util.algorithm.support.SelectionSort; fBWJ%W
import org.rut.util.algorithm.support.ShellSort; 5Du>-.r
K7[AiU_I
/** y5AXL5
* @author treeroot +%le/Pg@
* @since 2006-2-2 X~)V)'R
* @version 1.0 \A3>c|
*/ x(3 I?#kE
public class SortUtil { x,w`OMQ}c
public final static int INSERT = 1; 32bkouq
public final static int BUBBLE = 2; ]g8i>,G
public final static int SELECTION = 3; gM;)
public final static int SHELL = 4; Q&.IlVB[
public final static int QUICK = 5; gGI#QPT`X
public final static int IMPROVED_QUICK = 6; @^:7UI_
public final static int MERGE = 7; Z*)y.i`
public final static int IMPROVED_MERGE = 8; _sf#J|kQ
public final static int HEAP = 9; EYJi6#
Ot2zhR )
public static void sort(int[] data) { mOz&6T<|
sort(data, IMPROVED_QUICK); p'%: M
} ~*PK080N}
private static String[] name={ uku}Mr"p
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" lEyG9Xvi
}; WK_y1(v>
GEe 0@q#YA
private static Sort[] impl=new Sort[]{ m_E[bDON
new InsertSort(), ?LV-W
new BubbleSort(), _/N'I7g
new SelectionSort(), 0x>/6 <<
new ShellSort(), L&DF,fWsF&
new QuickSort(), G1?0Q_RN
new ImprovedQuickSort(), _']%qd"%
new MergeSort(), 35%[DUkb
new ImprovedMergeSort(), N)vk0IM!
new HeapSort() }o!#_N0T
}; _@BRpLs:4
* Y%<b86U
public static String toString(int algorithm){ XYK1-m}2
return name[algorithm-1]; A'~%_}
} f- k|w%R@
{ /F rs*AF
public static void sort(int[] data, int algorithm) { Mf;|z0UX
impl[algorithm-1].sort(data); _Ra<|NVQh
} #4P3xa
U=&^H!LVY
public static interface Sort { 4[LLnF--
public void sort(int[] data); ElEv(>G*
} #LN5&i;s
Z92iil;t
public static void swap(int[] data, int i, int j) { ~|r'2V*
int temp = data; O ':0V
data = data[j]; $TD~k;
data[j] = temp; ~$&:NB1~q
} 9k=U0]!ch
} 7g A08M[O