[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; 7|xu)zYB
} ?bPW*A82{q
int i1=l; fK _uuw4
int i2=mid+1; VAo`R9^D#
for(int cur=l;cur<=r;cur++){ ;X;(7
if(i1==mid+1) QHxof7
data[cur]=temp[i2++]; |- <72$j
else if(i2>r) )5NWUuH 5
data[cur]=temp[i1++]; l"1*0jgBw
else if(temp[i1] data[cur]=temp[i1++]; ^T#jBqe
else R^mkQb>m.
data[cur]=temp[i2++]; 9}_'
} t3AmXx
} UxxX8N
&>!-67
} gA`QV''/:
AB{zkEuK
改进后的归并排序: {1_<\~J
-u7NBtgUh
package org.rut.util.algorithm.support; z%1e>`\E
.Cf!5[0E
import org.rut.util.algorithm.SortUtil; MsZx 0]
sjOv!|]A
/** yh/JHo;
* @author treeroot p6aR/gFkqv
* @since 2006-2-2 x]@z.Yj
* @version 1.0 }'?qUy3x
*/ -k@1#c+z
public class ImprovedMergeSort implements SortUtil.Sort { @lq)L
3yw$<lm
private static final int THRESHOLD = 10; #.!#"8{0_
U{j4FlB
/* fs:yx'mxV
* (non-Javadoc) ( et W4p
* ak-agH
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) l p(D@FT
*/ PxQQfI>
public void sort(int[] data) { m"-kkH{I
int[] temp=new int[data.length]; \#xq$ygg
mergeSort(data,temp,0,data.length-1); jO/cdLKX(
} :b*7TJ\grN
t|V<K^
private void mergeSort(int[] data, int[] temp, int l, int r) { W/%hS)75
int i, j, k; K a& 2>F
int mid = (l + r) / 2; 1Y&W>p
if (l == r) _5H~1G%q
return; ,vO\n^
if ((mid - l) >= THRESHOLD) i39ZBs@
mergeSort(data, temp, l, mid); >~Xe` }'
else IC5QH<.$C
insertSort(data, l, mid - l + 1); 'l=>H#}<B
if ((r - mid) > THRESHOLD) (# mvDz
mergeSort(data, temp, mid + 1, r); N$=9R
else oH+PlL
insertSort(data, mid + 1, r - mid); BWQ`8
%\(-<aT
for (i = l; i <= mid; i++) { Zs{7km
temp = data; Lui6;NY
} H8I)D& cw
for (j = 1; j <= r - mid; j++) { :IBP "
temp[r - j + 1] = data[j + mid]; ;l~a|KW0
} >zDQt7+g;
int a = temp[l]; !yPy@eP~
int b = temp[r]; l`N4P
for (i = l, j = r, k = l; k <= r; k++) { Gp \-AwE
if (a < b) { B1J,4
data[k] = temp[i++]; n@ SUu7o
a = temp; bL`\l!qQx;
} else { k}F7Jw#.
data[k] = temp[j--]; (3mL!1\
b = temp[j]; -3mIdZ
} 87[ ,.W
} x?V^l*
} Dka8[z7
3o[(pfcU
/** :e=7=|@7
* @param data ?g{[U0)
* @param l K<:%ofB"S
* @param i sZCK?
*/ y705
private void insertSort(int[] data, int start, int len) { i a!!jK}
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 2F`#df
} \fEG5/s}T
} gJX"4]Ol#}
} [n| }>
} $)"T9$>$
~EY)c~H
堆排序： .z_nW1id
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package org.rut.util.algorithm.support; -rI7ihr*
APF`b
import org.rut.util.algorithm.SortUtil; PdVx&BL*
#*.4Jv<R
/** hG.}>(VV
* @author treeroot D((/fT)eD
* @since 2006-2-2 *Vq'%b9
* @version 1.0 (^FMm1@T
*/ YToG'#qs
public class HeapSort implements SortUtil.Sort{ ~&p]kmwXSX
5I6?gv/
/* (non-Javadoc) FT~c|ep.
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )e PQxx
*/ guYP|
public void sort(int[] data) { 8A]8yX =
MaxHeap h=new MaxHeap(); AJLzLbV+
h.init(data); K/C}
for(int i=0;i h.remove(); c^1JSGv
System.arraycopy(h.queue,1,data,0,data.length); +qjZ;5(
} NiVLx_<Pr'
nt|n[-}
private static class MaxHeap{ D[@-`F
p+b9D
void init(int[] data){ 2i!R>`
this.queue=new int[data.length+1]; um]*nXIr
for(int i=0;i queue[++size]=data; (AZneK :*
fixUp(size); W%ix|R^2]
} "7+^`?
} uv$5MwKU
tQ;Fgv8Y!
private int size=0; 4%nK0FAj
b}7g>
private int[] queue; ._x"b5C
!K*3bY`#
public int get() { 5?>Q[a.Ne
return queue[1]; EMH-[EBx
} 7SkW!5
Z%.Ld2Q{
public void remove() { 4xs>X7
SortUtil.swap(queue,1,size--); UVi9}zr
fixDown(1); u_ :gqvC=
} ~rOvVi&4
file://fixdown JK^%V\m
private void fixDown(int k) { Rb b[N#p5
int j; l3MA&&++KF
while ((j = k << 1) <= size) { 8j&1qJx)
if (j < size %26amp;%26amp; queue[j] j++; ?j!/Hc/b4
if (queue[k]>queue[j]) file://不用交换 +BI%.A`2
break; 4yxf/X)
SortUtil.swap(queue,j,k); P&o+ut:
k = j; =}0>S3a.7
} }/NL"0j+4
} aFrZ ;_
private void fixUp(int k) { Gqar5
while (k > 1) { Pa\yp?({q
int j = k >> 1; fEK%)Z:0
if (queue[j]>queue[k]) %tkL<e
break; uZ1G,9
SortUtil.swap(queue,j,k); <3k9 y^0
k = j; i}:^<jDv?
} bb/A}< zD
} J(,gLl
S^e e<%-
} 14-uy.0[
,tFLx#e#
} 4NFvX4
F+Hmp\rM#
SortUtil： m<4tH5};d
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package org.rut.util.algorithm; gWjz3ob
!| GD8i
import org.rut.util.algorithm.support.BubbleSort; >Cr'dKZ}
import org.rut.util.algorithm.support.HeapSort; 1NlpOVq:)
import org.rut.util.algorithm.support.ImprovedMergeSort; g31\7\)Ir
import org.rut.util.algorithm.support.ImprovedQuickSort; 9@p+g`o
import org.rut.util.algorithm.support.InsertSort; 'khhn6itA
import org.rut.util.algorithm.support.MergeSort; Bd13p_V"6
import org.rut.util.algorithm.support.QuickSort; Kv\uBMJNW
import org.rut.util.algorithm.support.SelectionSort; 6k\8ulHw
import org.rut.util.algorithm.support.ShellSort; H]f8W]"c[
9[\$\l
/** "g;}B"rG
* @author treeroot FVHR
* @since 2006-2-2 ]:]w+N%7
* @version 1.0 >R6>*|~S
*/ O#D N3yu?
public class SortUtil { @z.HyQ_v
public final static int INSERT = 1; Je~Ybh
public final static int BUBBLE = 2; -f[95Z3}
public final static int SELECTION = 3; 5./(n7d_
public final static int SHELL = 4; v/7iu*u
public final static int QUICK = 5; &f>1/"lnd\
public final static int IMPROVED_QUICK = 6; ?pF uV`Zm
public final static int MERGE = 7; yy3-Xu4
public final static int IMPROVED_MERGE = 8; Jp`qE
public final static int HEAP = 9; (V+iJ_1g{
3HmJixy
public static void sort(int[] data) { )eSD5hOI)
sort(data, IMPROVED_QUICK); -jsk-,
} 6m{1im=
private static String[] name={ 3LD`Ep
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" A@lY{e
}; Bso3Z ^X.
|b:91l
private static Sort[] impl=new Sort[]{ KF`@o@,
new InsertSort(), rwou[QU
new BubbleSort(), >NN&j#;x~
new SelectionSort(), HBnnIbEtF'
new ShellSort(), Vam4/6
new QuickSort(), 8L*P!j9`EY
new ImprovedQuickSort(), [P23.`G~J
new MergeSort(), n$y)F} .-
new ImprovedMergeSort(), VlQaT7Q
new HeapSort() aC2\C=ru_
}; v81H!c.*
/"<o""<]
public static String toString(int algorithm){ 9nPc>O$
return name[algorithm-1]; ;4 ON
} mN:p=.& <
r/vRaOg>X
public static void sort(int[] data, int algorithm) { @eGJ_J
impl[algorithm-1].sort(data); Xy(o0/7F9
} "R/Xv+;
sh%snLw
public static interface Sort { )tyhf(p6
public void sort(int[] data); 8E| Nf
} 3o=K?eOdg
24 i00s|#
public static void swap(int[] data, int i, int j) { }vbs6u
int temp = data; $fwv'
data = data[j]; >f$>Odqe
data[j] = temp; t:G67^<3
} MZX-<p+
} O:Fnxp5@