[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; M@q)\UQ'
} `ba<eT':
int i1=l; PDc4ok`)
int i2=mid+1; 3Jda:
for(int cur=l;cur<=r;cur++){ Q ijO%)
if(i1==mid+1) GM;uwL#
data[cur]=temp[i2++]; l0yflFGr
else if(i2>r) 8Dxg6>
data[cur]=temp[i1++]; c 3| Lk7Q
else if(temp[i1] data[cur]=temp[i1++]; z,C>Rh9Id
else 4 }_}3.
data[cur]=temp[i2++]; +NB5Fd4
} wU]8hkl?
} @DM NLsQ
?JRfhJ:j
} N/0Q`cQ-
"lA$;\&
改进后的归并排序: ]Zay9jD}c-
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package org.rut.util.algorithm.support; @$QtY(a
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import org.rut.util.algorithm.SortUtil; T8T,G4Q
)086u8w )y
/** y fS
* @author treeroot :SF8t`4`
* @since 2006-2-2 bw#\"uJ
* @version 1.0 2j>C4Ck
*/ I.6#>=
public class ImprovedMergeSort implements SortUtil.Sort { n n8N 9w
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private static final int THRESHOLD = 10; W89J]#v)k
z"sv,W
/* c3Ig4n0Y>
* (non-Javadoc) T5-'|+
* <&M5#:u
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #zd}xla0]
*/ Tkf4`Gxd
public void sort(int[] data) { 1-4*YrA
int[] temp=new int[data.length]; {\!@k\__
mergeSort(data,temp,0,data.length-1); #0qMYe>Y
} 9JC8OSjJ
}<P%W~
private void mergeSort(int[] data, int[] temp, int l, int r) { s.}:!fBk
int i, j, k; !%C&hH\
int mid = (l + r) / 2; \l;H!y[
if (l == r) E[_-s
return; O~#OVFJ9=
if ((mid - l) >= THRESHOLD) !jJH}o/KW
mergeSort(data, temp, l, mid); U./1OZ&
else Q#$dp
insertSort(data, l, mid - l + 1); kObgoMT<[
if ((r - mid) > THRESHOLD) oakm{I|k}
mergeSort(data, temp, mid + 1, r); iuq%Q\0@w
else I03 45Hc
insertSort(data, mid + 1, r - mid); Op<|Oz$Q|l
J 9k~cz
for (i = l; i <= mid; i++) { <~qhy{hRn
temp = data; [+$o`0q;N?
} !g-19at
for (j = 1; j <= r - mid; j++) { &5wM`
temp[r - j + 1] = data[j + mid]; ~dqEUu!C
} ODqWXw#
int a = temp[l]; ]+0I8eerd
int b = temp[r]; =l9H]`T/
for (i = l, j = r, k = l; k <= r; k++) { F{aM6I
if (a < b) { wms8z
data[k] = temp[i++]; .!J,9PE
a = temp; NCysYmt
} else { eqE%ofW
data[k] = temp[j--]; w,FOq?j^k
b = temp[j]; ,
} pn~$u
} "&/&v
} !Q5ip'L
jlZW!$Iq
/** N^.!l_
* @param data #zcnc$x\
* @param l l;g8_uyjv7
* @param i "i1~YE
*/ f[/E $r99J
private void insertSort(int[] data, int start, int len) { DNaU mz
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); x~tG[Y2F?
} :bgi*pR{
} q|%(47}z
} s],+]<qX
} @GGPw9a
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堆排序： rX#}2
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package org.rut.util.algorithm.support; 3RP}lb
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import org.rut.util.algorithm.SortUtil; ukr a)>Y[|
q*<Df=+B
/** Gu:aSb
* @author treeroot |vnfY; ;z1
* @since 2006-2-2 .Go3'$'v
* @version 1.0 v:<UbuJw
*/ b&!7(Q[ sT
public class HeapSort implements SortUtil.Sort{ 4+`<'t]Q
x=bAR%i~
/* (non-Javadoc) xF_ Y7rw1w
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) W<3nF5!
*/ Cj}1 )qWq
public void sort(int[] data) { _Ucj)Ud k
MaxHeap h=new MaxHeap(); INrUvD/*
h.init(data); #kV`G.EX
for(int i=0;i h.remove(); lV^sVN Z]
System.arraycopy(h.queue,1,data,0,data.length); c;ELAns>
} Kl$!_$
n}yqpW!%n
private static class MaxHeap{ d7u"Z5t
2`l$uEI3oJ
void init(int[] data){ 8KW}XG
this.queue=new int[data.length+1]; |_%|
for(int i=0;i queue[++size]=data; H>`?S{J
fixUp(size); pscCXk(|A`
} BjJ$I^
} Z| +/Wl-h
;/SM^&Y
private int size=0; -X Bh\w
h.g11xa
private int[] queue; ]`y4n=L.
'j!7 O+7y
public int get() { 7+j@0v\
return queue[1]; ~y^#?;
} s%J|r{F6
nKh._bvfX
public void remove() { iR(A^
SortUtil.swap(queue,1,size--); U\ y?P:yy
fixDown(1); 7Z"mVh}
} H4 & d,8:m
file://fixdown 5 8p_b
private void fixDown(int k) { zpIl'/i
int j; z(3mhMJY
while ((j = k << 1) <= size) { |z|5j!Nfh
if (j < size %26amp;%26amp; queue[j] j++; rFn;z}J2
if (queue[k]>queue[j]) file://不用交换 &H,j .~a&l
break; T8ZBQ;o
SortUtil.swap(queue,j,k); P~i^V;g
k = j; OsAXHjX}
} us4.-L
} )"jG)c^1*
private void fixUp(int k) { <i~ ( 8F\
while (k > 1) { 1U~AupHE
int j = k >> 1; m^O:k"+!
if (queue[j]>queue[k]) /^#k/z
break; f3V&i)w(
SortUtil.swap(queue,j,k); [={pFq`
k = j; pt(GpbtWK
} [lQp4xgxi
} Zo;@StN3}T
/,/T{V[
} 8b(UqyV
%zd1\We
} 2#*Bw=
|>A1J:
SortUtil： 7-w +/fv
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package org.rut.util.algorithm; A!<R?
ZGzrh`j{-
import org.rut.util.algorithm.support.BubbleSort; {+z+6i
import org.rut.util.algorithm.support.HeapSort; =a?l@dI]
import org.rut.util.algorithm.support.ImprovedMergeSort; (bH"x
import org.rut.util.algorithm.support.ImprovedQuickSort; EiP_V&\
import org.rut.util.algorithm.support.InsertSort; Zj~tUCc
import org.rut.util.algorithm.support.MergeSort; |j^>6nE
import org.rut.util.algorithm.support.QuickSort; jLD=EJ
import org.rut.util.algorithm.support.SelectionSort; F]z xx
import org.rut.util.algorithm.support.ShellSort; >efYpd#^
0$}+tq+
/** #g{ZfO[#
* @author treeroot # u^FB
* @since 2006-2-2 ;TMH.E,h:
* @version 1.0 ^%#v AS
*/ -Qiay/tlu
public class SortUtil { = Yh>5A
public final static int INSERT = 1; K^A\S
public final static int BUBBLE = 2; 4rwfY<G
public final static int SELECTION = 3; f Nm Sx
public final static int SHELL = 4; 8Th|'
public final static int QUICK = 5; H`),PY2
public final static int IMPROVED_QUICK = 6; 1U@qRU
public final static int MERGE = 7; S<88>|&n]
public final static int IMPROVED_MERGE = 8; "p#mNc
public final static int HEAP = 9; zg)Z2?K|;u
)3'/g`c
public static void sort(int[] data) { JT[|l-\zo
sort(data, IMPROVED_QUICK); Cj_cu
} 3UslVj1u
private static String[] name={ -AD3Pd|Y[
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" R\A5f\L9
}; iZgv VH
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private static Sort[] impl=new Sort[]{ -?2ThvT
new InsertSort(), mAk)9`f/
new BubbleSort(), y*vs}G'W
new SelectionSort(), s$&:F4=?
new ShellSort(), Rl.3p<sX
new QuickSort(), rVt6tx
new ImprovedQuickSort(), `L]cJ0tAs
new MergeSort(), %^2LTK(P
new ImprovedMergeSort(), +sQ=Uw#e
new HeapSort() vtCt6M
}; hG uRV|`
jC@$D*"J
public static String toString(int algorithm){ %%G2w63M
return name[algorithm-1]; ]A5FN4 E
} |@sUN:G4k
3-lJ]7OT
public static void sort(int[] data, int algorithm) { TlQ#0_as[
impl[algorithm-1].sort(data); pzg|?U
} kHo0I8
rs]%`"&=
public static interface Sort { ,gUSW
public void sort(int[] data); *_!nil3(i
} W[AX?
#:3ca] k
public static void swap(int[] data, int i, int j) { Y]Vt&*{JV
int temp = data; jdK~]eld=
data = data[j]; !0zbWB9
data[j] = temp; 4fT,/[k?
} 3 i Id>
} <ZSH1~<{6