[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; ~n=oPm$pR
} 6L<Y
int i1=l; jWL%*dJrN
int i2=mid+1; ]Z IreI
for(int cur=l;cur<=r;cur++){ +7\"^D
if(i1==mid+1) L}=DC =E
data[cur]=temp[i2++]; z{H=;"+rh
else if(i2>r) gCV+amP
data[cur]=temp[i1++]; f/95}6M
else if(temp[i1] data[cur]=temp[i1++]; &M>o
else vc%=V^)N7U
data[cur]=temp[i2++]; gp+aUK~o
} KPjC<9sby
} u']}Z%A9`
k3+LP7|*
} 0gRm LX
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改进后的归并排序: )TfX}
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package org.rut.util.algorithm.support; ,Dab(
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import org.rut.util.algorithm.SortUtil; b($9gre>mI
QQ,V35Vp[
/** +mPVI
* @author treeroot 5pU/X.lc
* @since 2006-2-2 7v&>d,
* @version 1.0 @?JFqwq!
*/ 6$)FQ U
public class ImprovedMergeSort implements SortUtil.Sort { 8'PK}heBU
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private static final int THRESHOLD = 10; 6]r#6c%
!o`riQLs>
/* r]0>A&,
* (non-Javadoc) vRh)o1u)
* D"msD"
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Q h{P>}
*/ !^'6&NR#K
public void sort(int[] data) { ]f~!Qk!I7r
int[] temp=new int[data.length]; )g?ox{Hol
mergeSort(data,temp,0,data.length-1); B[IWgvB(e
} k4PXH
@#=yC.s
private void mergeSort(int[] data, int[] temp, int l, int r) { r=HL!XFk
int i, j, k; !k Heslvi
int mid = (l + r) / 2; R`J.vMT
if (l == r) IISdC(5
return; Q@1SqK#-DQ
if ((mid - l) >= THRESHOLD) "l{{H&d
mergeSort(data, temp, l, mid); e3mFO+
else i}e/!IVR3
insertSort(data, l, mid - l + 1); Zts1BWL[
if ((r - mid) > THRESHOLD) 1N[9\Yi
mergeSort(data, temp, mid + 1, r); ?AO22N|j
else K$l@0r ~k
insertSort(data, mid + 1, r - mid); j}O qWX>/
2bOl`{x
for (i = l; i <= mid; i++) { aoQ$"PF9
temp = data; ejia4(Cd
} ;F_P<b 2
for (j = 1; j <= r - mid; j++) { dT0>\9ZNr
temp[r - j + 1] = data[j + mid]; j#Qnu0D
} ^(s(4|
int a = temp[l]; erKi*GssZ
int b = temp[r]; ^T#jBqe
for (i = l, j = r, k = l; k <= r; k++) { W&k@p9
if (a < b) { S17;;w0
data[k] = temp[i++]; \Q^grX
a = temp; 0(>3L:
} else { )HcLpoEi
data[k] = temp[j--]; X~cdM1z?
b = temp[j]; cm0$v8
} @+0dgkJ
} Cmp5or6d
} b!e0pFS;
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/** zwU1(?]I{
* @param data t,n2N13
* @param l W~PMR/^i
* @param i Yw yMCd
*/ rog1
private void insertSort(int[] data, int start, int len) { l3*GQ~m7
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); l<p<\,nV$
} l-P6B9e|\
} 5KfrkZ
} N/'8W9#6
} peHjKK
i&8|@CACb
堆排序： FQ>kTm`d
~<-mxOe
package org.rut.util.algorithm.support; =~"X/>'
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import org.rut.util.algorithm.SortUtil; eY-h<K)y
R={#V8D~
/** 6$0<&')Yb
* @author treeroot OwEu S#-
* @since 2006-2-2 tJ7F.}\;C
* @version 1.0 #.!#"8{0_
*/ UCXRF
public class HeapSort implements SortUtil.Sort{ xHqF_10S#
fs:yx'mxV
/* (non-Javadoc) ?pcbso
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) hs5>Gx
*/ j0j!oj)7I
public void sort(int[] data) { [2YPV\=
MaxHeap h=new MaxHeap(); 8;L;R~Q
h.init(data); PxQQfI>
for(int i=0;i h.remove(); ,"KfZf;?
System.arraycopy(h.queue,1,data,0,data.length); '9=b@SaAj
} \#xq$ygg
a]Pw:lT
private static class MaxHeap{ h@Jg9AM
*u:,@io7'G
void init(int[] data){ 0w: 3/WO
this.queue=new int[data.length+1]; 97UOH
for(int i=0;i queue[++size]=data; xticC>
fixUp(size); qpMcVJL
} f,F1k9-1!
} W/%hS)75
[& Z- *a
private int size=0; 1r};cY6
@?3^Ks_
private int[] queue; ks\q^ten
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public int get() { W~2,J4=
return queue[1]; S0Io$\ha
} <i4]qO(0u
/t< &
public void remove() { IC5QH<.$C
SortUtil.swap(queue,1,size--); x.Egl4b3
fixDown(1); %)r:!R~R
} J <;xkT1x
file://fixdown h`n '{s
private void fixDown(int k) { jpO0dtn3=
int j; KS<@;Tt
while ((j = k << 1) <= size) { :V5 Co!/+
if (j < size %26amp;%26amp; queue[j] j++; BWQ`8
if (queue[k]>queue[j]) file://不用交换 k*n~&y:O
break; cc*?4C/t
SortUtil.swap(queue,j,k); 4].o:d;`/
k = j; 2$kB^g!:o
} bhGRD{=
} _/z_ X
private void fixUp(int k) { :IBP "
while (k > 1) { \O4s0*gw
int j = k >> 1; Z5n-3h!+ED
if (queue[j]>queue[k]) w|]Tt="
break; *;9H\%
SortUtil.swap(queue,j,k); -3i(N.)<;
k = j; AWi>(wk<
} u<uc"KY=
} !L8q]]'XM
Sir1>YEm
} k2$pcR,WM
fkp(M
} QNINn>2
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SortUtil： #^r-D[/m
[8UZ5_1WL
package org.rut.util.algorithm; 0 K#|11r
C3Q #[
import org.rut.util.algorithm.support.BubbleSort; ?gUraSFU
import org.rut.util.algorithm.support.HeapSort; .%{B=_7
import org.rut.util.algorithm.support.ImprovedMergeSort; Y,v9o
import org.rut.util.algorithm.support.ImprovedQuickSort; |" WL
import org.rut.util.algorithm.support.InsertSort; S9P({iZK
import org.rut.util.algorithm.support.MergeSort; oJ %Nt&q
import org.rut.util.algorithm.support.QuickSort; m3Wc};yE*Q
import org.rut.util.algorithm.support.SelectionSort; W{.:Cf9
import org.rut.util.algorithm.support.ShellSort; $*G3'G2'iS
zN!yOlp5
/** rP'%f 6
* @author treeroot $.pCoS]i
* @since 2006-2-2 =WUL%MfW
* @version 1.0 Iy49o!
*/ %6 Av1cv
public class SortUtil { fMFkA(Of^
public final static int INSERT = 1; &"JC8
public final static int BUBBLE = 2; ^7/v[J<<
public final static int SELECTION = 3; S+~;PmN9qL
public final static int SHELL = 4; x%r$/=
public final static int QUICK = 5; ~dEo^vJD
public final static int IMPROVED_QUICK = 6; -k7b# +T
public final static int MERGE = 7; i_Q1\_m!
public final static int IMPROVED_MERGE = 8; Ycm.qud ?
public final static int HEAP = 9; ~EY)c~H
3'kKbrk [
public static void sort(int[] data) { 7Z`4Kdh .
sort(data, IMPROVED_QUICK); a'|]_`36x
} [KYq01cj
private static String[] name={ P$Vh{]4i{
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" fsPNxy"_
}; EBW*v '
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private static Sort[] impl=new Sort[]{ DvQV_D
new InsertSort(), J.:
new BubbleSort(), lqv}~MC
new SelectionSort(), Q2Ey RFT
new ShellSort(), #K:iB*
new QuickSort(), 1="]'!2Is
new ImprovedQuickSort(), fqbeO9x
new MergeSort(), VnSO>O
new ImprovedMergeSort(), 7F>]zrbK
new HeapSort() eA(\#+)X `
}; Ncbe{}<md
O0z-jZ,])
public static String toString(int algorithm){ NR(rr.
return name[algorithm-1]; USN'-Ah
} o g9|}E>
?>*d82yO
public static void sort(int[] data, int algorithm) { yW1N&$n
impl[algorithm-1].sort(data); i^jM9MAi
} O4f9n
Lf^ 7|
public static interface Sort { D$)F X(
public void sort(int[] data); 6wB !dl
} ef{Hj[8
*vRHF1)L
public static void swap(int[] data, int i, int j) { .Qn#wub
int temp = data; M5+R8ttc
data = data[j]; rwUhNth-Qh
data[j] = temp; ^0>^5l'n
} T+P{,,a/]
} 4`#%<G