[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; yttIA/
} tf_<w?~
int i1=l; J'no{3Ktz
int i2=mid+1; d-sK{ZC"y
for(int cur=l;cur<=r;cur++){ |Wzdu2T
if(i1==mid+1) XlHt(d0h
data[cur]=temp[i2++]; %^ z##7^
else if(i2>r) n#lZRwhq
data[cur]=temp[i1++]; ^-GzWT
else if(temp[i1] data[cur]=temp[i1++]; M5>cYVG
else t?<pyw $
data[cur]=temp[i2++]; 7"0l>0 \
} sGs_w:Hn
} Y}Gf%Xi,
YdNmnB%J
} |Xv]s61
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改进后的归并排序: TDo!yQ
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package org.rut.util.algorithm.support; K:\db'``
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import org.rut.util.algorithm.SortUtil; 9j~|m
eQQ*ZNG
/** }4A $j{\
* @author treeroot L5-Kw+t
* @since 2006-2-2 d2XSw>
* @version 1.0 ,U^V]jC
*/ 2J5RZg9jL
public class ImprovedMergeSort implements SortUtil.Sort { B8sc;Z.
B%Vz -t
private static final int THRESHOLD = 10; Tz{f5c&
{,`)
/* [c_o.`S_\
* (non-Javadoc) oe*Y(T\G
* 27q=~R}
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "Gh5 ^$w?j
*/ aS,M=uqqK
public void sort(int[] data) { >GV= %
int[] temp=new int[data.length]; G34fxhh
mergeSort(data,temp,0,data.length-1); krI@N}OU
} o@!Uds0
AV%t<fDG#
private void mergeSort(int[] data, int[] temp, int l, int r) { /$NZj"#
int i, j, k; o+j~~P
int mid = (l + r) / 2; <+\ w.!
if (l == r) M!j: 2dT"
return; _cw~N p
if ((mid - l) >= THRESHOLD) /3mt=1/~{B
mergeSort(data, temp, l, mid); aH!2zC\:T
else g=5vnY
insertSort(data, l, mid - l + 1); XV|u!'Ey
if ((r - mid) > THRESHOLD) _2N7E#m"S
mergeSort(data, temp, mid + 1, r); "Smek#l
else dnW#"
insertSort(data, mid + 1, r - mid); g4-UBDtYt
K[~fpQGbV1
for (i = l; i <= mid; i++) { mv;;0xH
temp = data; -{ M(1vV(=
} N& 683z
for (j = 1; j <= r - mid; j++) { 5U!yc7eBI/
temp[r - j + 1] = data[j + mid]; n?=d)[]
} B{ptP4As-
int a = temp[l]; VwKo)zH
int b = temp[r]; rMy(NAo_
for (i = l, j = r, k = l; k <= r; k++) { zs<2Ozv
if (a < b) { ?7]UbtW[
data[k] = temp[i++]; / 80Q
a = temp; 2Sg^SZFH+o
} else { ,/uVq G
data[k] = temp[j--]; 0 P]+/
b = temp[j]; >q!:*
} ZP}NFh%,u
} "f5neW
} }mx>3G{d
,VdNP
/** 9J $"Qt5;6
* @param data Q6lC:cB<
* @param l aHR&6zj4
* @param i rOyKugHe
*/ T}55ZpSC&
private void insertSort(int[] data, int start, int len) { Z;qgB7-M
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ]8;2Oh
} Z| f~
} '1r<g\l
} +IkL=/';#
} )] C"r_
io1hUZ
堆排序： #i1z&b#@
Q`{2yU:r
package org.rut.util.algorithm.support; c ?(X(FQ
2iV/?.<Z&
import org.rut.util.algorithm.SortUtil; b\9MM
o NqIrYH'
/** ]?3-;D.eG
* @author treeroot J'H}e F`
* @since 2006-2-2 n&N>$c,T27
* @version 1.0 !x@3U^${
*/ V[RsSZx =
public class HeapSort implements SortUtil.Sort{ OoqA`%
u>y/<9]q8
/* (non-Javadoc) 1>IA9]D7
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) z3mo2e
*/ S+*g
public void sort(int[] data) { ZKp9k6
MaxHeap h=new MaxHeap(); T5gL
h.init(data); EjDr
for(int i=0;i h.remove(); qQ T^d
System.arraycopy(h.queue,1,data,0,data.length); E# UAC2Q
} x3L0;:Fx8P
.2v)x
private static class MaxHeap{ VTIRkC wl@
IL&;2%
void init(int[] data){ oT}-i [=}
this.queue=new int[data.length+1]; wk[4Qsk<
for(int i=0;i queue[++size]=data; hqwDlapTt
fixUp(size); ?Fp2W+M j
} ?Zv>4+Y'
} ["7]EW\!:
>)6d~
private int size=0; id:6O+\
iR39lOr
private int[] queue; \>N"{T
L2}p<?f
public int get() { n{8v^x
return queue[1]; z\zqmW6
} 2[QyH'"^E
W6Z3UJ-
public void remove() { ;cD&qheDV
SortUtil.swap(queue,1,size--); ..a@9#D
fixDown(1); /4wPMAlb
} CjT]!D)s
file://fixdown 3^-yw`
private void fixDown(int k) { RJa1pYK
int j; qw35LyL
while ((j = k << 1) <= size) { tuIQiWHbM
if (j < size %26amp;%26amp; queue[j] j++; <#>{7" }
if (queue[k]>queue[j]) file://不用交换 %Xjg/5G-
break; Jnl#d0) -
SortUtil.swap(queue,j,k); `Dp_c&9]
k = j; Zg;%$ kSQ
} 3"HX':8x
} \s^4f#
private void fixUp(int k) { jk9/EmV*r
while (k > 1) { cOrFe;8-.
int j = k >> 1; GX,)~Syw*
if (queue[j]>queue[k]) v~`'!N8
break; {O"N2W
SortUtil.swap(queue,j,k); oF {u
k = j; -(1GmU5v(
} D9/PVd&#
} PGNH<E)
|:)ARH6l#
} {T'M4y=)i
_<m yM2z
} yDmx)^En
\l71Q/y6u`
SortUtil： H*R4AE0
XZH\HK)K-]
package org.rut.util.algorithm; k?VH4yA
.z}*!
import org.rut.util.algorithm.support.BubbleSort; Uxb>)36I
import org.rut.util.algorithm.support.HeapSort; W0;MGBfb
import org.rut.util.algorithm.support.ImprovedMergeSort; S<Od`I
import org.rut.util.algorithm.support.ImprovedQuickSort; HBiUp$(mB
import org.rut.util.algorithm.support.InsertSort; $-p#4^dg
import org.rut.util.algorithm.support.MergeSort; G/y;o3/[Z
import org.rut.util.algorithm.support.QuickSort; E;-*LT&{
import org.rut.util.algorithm.support.SelectionSort; s^zX9IVnp
import org.rut.util.algorithm.support.ShellSort; 3Xl!Z^W
+V;@)-
/** }+dDGFk
* @author treeroot *9)yN[w
* @since 2006-2-2 !v68`l15
* @version 1.0 (y!V0iy]
*/ L7OFZ|gUz
public class SortUtil { kS1?%E,)q
public final static int INSERT = 1; <BX'Owbs!O
public final static int BUBBLE = 2; ukwO%JAr
public final static int SELECTION = 3; `w K6B5>
public final static int SHELL = 4; klxNGxWAX
public final static int QUICK = 5; MR}h}JEx0
public final static int IMPROVED_QUICK = 6; cVuT|b^
public final static int MERGE = 7; 9`Zwa_Tni
public final static int IMPROVED_MERGE = 8; :>3/*"vx?G
public final static int HEAP = 9; *EllE+M{n
r31)Ed$
public static void sort(int[] data) { 'wd&O03&
sort(data, IMPROVED_QUICK); ~Hb2-V
} kmur={IR
private static String[] name={ aM!%EaT
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" )m<CmYr2
}; =)IV^6~b
DtglPo_(
private static Sort[] impl=new Sort[]{ -a`PW
new InsertSort(), n?}7vz;
new BubbleSort(), :e!3-#H
new SelectionSort(), @s7wKk
new ShellSort(), !.@F,wZvY
new QuickSort(), x03@}M1
new ImprovedQuickSort(), =BroH\
new MergeSort(), aK5O0`
new ImprovedMergeSort(), RZbiiMC>
new HeapSort() *RJiHcII
}; ~jDf,a2
5h@5.-}
public static String toString(int algorithm){ _qvzZ6
return name[algorithm-1]; Sgq" 3(+%,
} 91\]Dg
M&J$9X
public static void sort(int[] data, int algorithm) { kX "*kD
impl[algorithm-1].sort(data); ?G<.W[3
} 49-wFF
N-YCOSUu
public static interface Sort { ='Fh^]*5
public void sort(int[] data); BI:O?!:9)
} a_U[!`/w
q:<vl^<j
public static void swap(int[] data, int i, int j) { ~=k?ea/>
int temp = data; q"$C)o
data = data[j]; xM2UwTpW
data[j] = temp; +~\1g^h
} rtC:3fDy
} O*udVE>