[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; Vzdh8)Mu\
} #Ssx!+q?
int i1=l; mpuq 9)6
int i2=mid+1; YaKeq5%y
for(int cur=l;cur<=r;cur++){ TgmnG/Z
if(i1==mid+1) ;CmS ~K:
data[cur]=temp[i2++]; QS` PpyBkd
else if(i2>r) G~2jUyv
data[cur]=temp[i1++]; zr+zhpp
else if(temp[i1] data[cur]=temp[i1++]; njScz"L~
else Q<^Tl(`/N?
data[cur]=temp[i2++]; nrxo&9[@n
} `\gnl'
} E*V`":efS
s.N7qO^:E
} K1r#8Q!t
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改进后的归并排序: H:t$'kb`
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package org.rut.util.algorithm.support; zR1^I~ %
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import org.rut.util.algorithm.SortUtil; 544X1Ww2
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/** XC0bI,Fu,
* @author treeroot 'IZI:V"
* @since 2006-2-2 B$ajK`x&I
* @version 1.0 .aAL]-Rj
*/ u frW\X
public class ImprovedMergeSort implements SortUtil.Sort { i'H/ZwU
n>+mL"hs
private static final int THRESHOLD = 10; )uj Ex7&c
OGde00
/* \r /ya<5
* (non-Javadoc) b J=Jg~&
* TUV&vz{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,SynnE68
*/ iYORu3
public void sort(int[] data) { Tl$[4heE
int[] temp=new int[data.length]; ej4W{IN~:
mergeSort(data,temp,0,data.length-1); kzn5M&f>
} Vr6@>@SC
hAYTj0GZ
private void mergeSort(int[] data, int[] temp, int l, int r) { x }\64
int i, j, k; k7?N ?7w
int mid = (l + r) / 2; }.3nthgz
if (l == r) 1|kvPo#
return; ;1`fC@rI
if ((mid - l) >= THRESHOLD) sYe?M,
mergeSort(data, temp, l, mid); R< ,`[*Z
else -8eoNzut
insertSort(data, l, mid - l + 1); _/uFsYC
if ((r - mid) > THRESHOLD) Mr;E<Lj ^K
mergeSort(data, temp, mid + 1, r); VL%UR{
else uw[<5
insertSort(data, mid + 1, r - mid); *5vV6][
M=1nQF2J
for (i = l; i <= mid; i++) { M9V q -U18
temp = data; rR9|6l 3
} mef<=5t
for (j = 1; j <= r - mid; j++) { [5zx17'
temp[r - j + 1] = data[j + mid]; ]ndvt[4L
} 9xO#tu]
int a = temp[l]; $ACvV"b
int b = temp[r]; iYDEI e
for (i = l, j = r, k = l; k <= r; k++) { [`{Z}q&
if (a < b) { ,TXTS*V?
data[k] = temp[i++]; W3IpHV
a = temp; C ~<'rO}|
} else { o7J
data[k] = temp[j--]; PZE0}>z
b = temp[j]; 0Fk5kGD,&K
} *AoR==:ya
} O4r0R1VQM
} zm]aU`j
/tP|b_7O
/** :rHJ4Tl
* @param data :"=ez<t
* @param l wF <n=
* @param i XWA:J^
*/ D2](da:]8)
private void insertSort(int[] data, int start, int len) { N}pw74=1
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); [q/Abz'i
} H<v'^*(
} ln?v j)j
} ;'5>q&[qbP
} (d(hR0HKE
AvdXEY(-
堆排序： 7![,Q~Fy
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package org.rut.util.algorithm.support; n#q<`}u,
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import org.rut.util.algorithm.SortUtil; BybW)+~
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/** D}dn.$
* @author treeroot iVB86XZ`
* @since 2006-2-2 bn^{c
* @version 1.0 PV9pa/`@
*/ `S6x<J&T\/
public class HeapSort implements SortUtil.Sort{ Sx?ua<`:d
uT}' Y)m
/* (non-Javadoc) 5]n[]FW
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) V}dJ.I /#
*/ FrTi+& <
public void sort(int[] data) { AWP"b?^G|
MaxHeap h=new MaxHeap(); ]|MEx{BG-
h.init(data); AD1=[I3
for(int i=0;i h.remove(); 9[G[$c
System.arraycopy(h.queue,1,data,0,data.length); [x9KVd ^d
} 1+9W+$=h2
POvP]G9'"
private static class MaxHeap{ Z8rvWH9
clNkph
void init(int[] data){ R{ a"Y$
this.queue=new int[data.length+1]; Q^ pmQ
for(int i=0;i queue[++size]=data; B[V+ND'(
fixUp(size); U<CTubF
} rW+ =,L
} H-~6Z",1
QA<Jr5Ys
private int size=0; XmEq2v
kuol rfGB
private int[] queue; ;?8_G%va
tS|(K=$
public int get() { fjU8gV
return queue[1]; $lLz3YS
} 'R c,Mq'
lEhk'/~
public void remove() { R $&o*K`?
SortUtil.swap(queue,1,size--); *Eo?k<:zPm
fixDown(1); Pb?$t
} oJ4AIQjB
file://fixdown %KmiH ;U
private void fixDown(int k) { u/M+u;
int j; w,h`s.AN
while ((j = k << 1) <= size) { JKGc3j,+#
if (j < size %26amp;%26amp; queue[j] j++; Vm3v-=6
if (queue[k]>queue[j]) file://不用交换 rd9e \%A
break; =K6($|'=
SortUtil.swap(queue,j,k); XzIl`eH
k = j; j#+!\ft5
} S,Xnzrz
} ?)u@Rf9>
private void fixUp(int k) { CaL\fZ
while (k > 1) { G5CI<KRK#
int j = k >> 1; 1XD,uoxB
if (queue[j]>queue[k]) a{R%#e\n
break; P%#<I}0C
SortUtil.swap(queue,j,k); Z@3i$8
k = j; ynE)Xdh
} kP-3"ACG
} 7PtN?;rP
^R# E:3e
} I~ok4L?VB
3+@<lVew6
} E;+O($bA
LN@F+CyDc
SortUtil： bI:zp!-.
xO&eRy?%
package org.rut.util.algorithm; 8$0rR55
\3pc"^W
import org.rut.util.algorithm.support.BubbleSort; /7}It$|nhy
import org.rut.util.algorithm.support.HeapSort; [[;e)SoA
import org.rut.util.algorithm.support.ImprovedMergeSort; 6f\Lf?vF
import org.rut.util.algorithm.support.ImprovedQuickSort; P@9t;dZN
import org.rut.util.algorithm.support.InsertSort; RLLTw ?]$
import org.rut.util.algorithm.support.MergeSort; cNM3I,o7
import org.rut.util.algorithm.support.QuickSort; l]8D7(g
import org.rut.util.algorithm.support.SelectionSort; Of4^?` ^
import org.rut.util.algorithm.support.ShellSort; "x3lQ
)XYv}U
/** hM{{\yZS
* @author treeroot Uc@Ao:
* @since 2006-2-2 4`!Z$kt
* @version 1.0 Jo@|"cE=
*/ no< ^f]33
public class SortUtil { @>W(1mRi
public final static int INSERT = 1; |Z=^`J
public final static int BUBBLE = 2; qI~xlW
public final static int SELECTION = 3; Tl2C^j
public final static int SHELL = 4; @wE5S6! B\
public final static int QUICK = 5; (X?%^^e!
public final static int IMPROVED_QUICK = 6; 4}4Pyjh
public final static int MERGE = 7; A29gz:F(
public final static int IMPROVED_MERGE = 8; L#+q]j+
public final static int HEAP = 9; 0tEYU:Qu
my4giC2a
public static void sort(int[] data) { _OuWB"
sort(data, IMPROVED_QUICK); _nbBIaHN{
} `C$:Yf]%nG
private static String[] name={ bO'Sgc[]
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" p2DrEId
}; .ys6"V|31
~TSy<t~%-
private static Sort[] impl=new Sort[]{ gx\&_)w N
new InsertSort(), Il= W,/y
new BubbleSort(), vK_?<>
new SelectionSort(), a hR ^
new ShellSort(), A-T]9f9
new QuickSort(), 2JJ"O|Ibz
new ImprovedQuickSort(), Z|5?7v;h5
new MergeSort(), }M3fmAP}
new ImprovedMergeSort(), Z;:u'=
new HeapSort() }^/9G17
}; c@/(B:@
ni<A3OB
public static String toString(int algorithm){ E}40oID
return name[algorithm-1]; /4` 0?/V
} &!/}Qp
^(|vsFzn
public static void sort(int[] data, int algorithm) { `"&da#N]
impl[algorithm-1].sort(data); L:1^Kxg
} MD|5 ol9
b0Kc^uj5
public static interface Sort { m6',SY9T
public void sort(int[] data); ^!9~Nwn
} Cb9;QzBVA#
p' +
public static void swap(int[] data, int i, int j) { ds?v'|
int temp = data; ,]+z)
data = data[j]; \hM|(*DL
data[j] = temp; Bc6|n :;u
} }RwSp!}C
} S%yd5<%_