[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; 7P7b8]
} g-vg6@6
int i1=l; !rhk $L
int i2=mid+1; eb|i3.
for(int cur=l;cur<=r;cur++){ $c&0F,
if(i1==mid+1) a8AYcEb
data[cur]=temp[i2++]; yA[({2%
else if(i2>r) x&A vUJ
data[cur]=temp[i1++]; (.3'=n|kE
else if(temp[i1] data[cur]=temp[i1++]; CCDDK L]N:
else 4ujvD^
data[cur]=temp[i2++]; t_ur&.^SB
} MP>n)!R[`
} e&9F\e
@uH#qg7
} _DP|-bp D
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改进后的归并排序: Vc3mp;6"
gX5&d\y
package org.rut.util.algorithm.support; z{]?h cY
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import org.rut.util.algorithm.SortUtil; Qju`e Eo
V^il$'
/** -p-0;Hy
* @author treeroot ->lu#;A5
* @since 2006-2-2 W0cgI9=9
* @version 1.0 6yAA~;*5'
*/ P6U%=xaC
public class ImprovedMergeSort implements SortUtil.Sort { AAUyy :
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private static final int THRESHOLD = 10; G&f7+e
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/* 'YSuQP>
* (non-Javadoc) ;,OfJ'q^
* ;\%sEcpT
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) RD<75]**{
*/ @oe\"vz
public void sort(int[] data) { <1~^C
int[] temp=new int[data.length]; %"A_!<n@*`
mergeSort(data,temp,0,data.length-1); [{&jr]w`|
} q\9d6u=Gm
4-v6=gz.
private void mergeSort(int[] data, int[] temp, int l, int r) { 5 ZfP
int i, j, k; Me:{{-V4
int mid = (l + r) / 2; ?PPZp6A3L=
if (l == r) v@EQ^C2.&
return; yy(A(}
if ((mid - l) >= THRESHOLD) bb=uF1
mergeSort(data, temp, l, mid); F#+.>!
else Ey&aBYR
insertSort(data, l, mid - l + 1); '7Ig.K&
if ((r - mid) > THRESHOLD) }{],GHCjQ
mergeSort(data, temp, mid + 1, r); G\iyJSj[P
else G{ mC7@
insertSort(data, mid + 1, r - mid); +iF 1sC_
#^mqQRpgq
for (i = l; i <= mid; i++) { ^~L}<]
temp = data; ?Hy+'sq[
} Q*O<@
for (j = 1; j <= r - mid; j++) { v@u<Ww;=@
temp[r - j + 1] = data[j + mid]; O%1/r*
} q'(z #h,cv
int a = temp[l]; 8TZENRzx-|
int b = temp[r]; Lu>H`B7Q"
for (i = l, j = r, k = l; k <= r; k++) { nwM)K
if (a < b) { h ; kfh.
data[k] = temp[i++]; )%JD8;[Jq
a = temp; <`g3(?
} else { GHN3PEJ>
data[k] = temp[j--]; G{c#\?12C
b = temp[j]; E,*&BDW
} aU<s<2O)
} S_8r\B[>P
} &/ouW'oP
!E&MBAKy
/** =l`OHTg
* @param data W8aU"_
* @param l xRX>|S
* @param i x,Y5U+]E
*/ |pWaBh|r
private void insertSort(int[] data, int start, int len) { # .q#OC
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); u.6P-yh
} u3dsQU
} .2X2b<%)
} Gq]d:-7l
} ]h~o],:
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堆排序： ^9ng)
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package org.rut.util.algorithm.support; d\Jji 6W
lfS;?~W0k
import org.rut.util.algorithm.SortUtil; !dv-8C$U
+{rJ[J/g
/** am:.NG+
* @author treeroot 5}a"?5J^
* @since 2006-2-2 \f"?Tv-C'
* @version 1.0 N8+P
*/ ,k*F`.[
public class HeapSort implements SortUtil.Sort{ 4MX7=!E
x N`T
/* (non-Javadoc) $A?}a
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) AMk~dzNt
*/ pT=2e&
public void sort(int[] data) { xv0M
MaxHeap h=new MaxHeap(); 4r*Pa(;y
h.init(data); 6ojo##j
for(int i=0;i h.remove(); oCJbkt=
System.arraycopy(h.queue,1,data,0,data.length); QHQj/)J8
} %3,xaVN
?~)Ak`=
private static class MaxHeap{ 0>Fqx{!heq
Vj!WaN_
void init(int[] data){ rl|Q)A{
this.queue=new int[data.length+1]; ~t9Mh^gij
for(int i=0;i queue[++size]=data; ? ICDIn
fixUp(size); H7jTQW0rp5
} 3'@&c?Fye
} OROqT~6G
!`C%Fkq
private int size=0; dzxI QlP
Mdky^;qq3;
private int[] queue; n2E4!L|q
DR{]sG
public int get() { !Mil?^
return queue[1]; 0Bu*g LY
} k5s?lWH
1(pjVz&
public void remove() { 3k{c$x}
SortUtil.swap(queue,1,size--); L?.7\a@
fixDown(1); Jy`G]]?
} !VNbj\Bp
file://fixdown ;/aB)JZ5=
private void fixDown(int k) { /h-6CR Ka
int j; r./z,4A`
while ((j = k << 1) <= size) { wQw-:f-
if (j < size %26amp;%26amp; queue[j] j++; :}y| 4*z
if (queue[k]>queue[j]) file://不用交换 y&3TQ]f\
break; -3`Isv
SortUtil.swap(queue,j,k); r?afv.@L2
k = j; @>CG3`?}
} c&A]pLn+x
} Pzptr%{
private void fixUp(int k) { tgfM:kzw
while (k > 1) { @LHtt/&
int j = k >> 1; `~|DoSi^d
if (queue[j]>queue[k]) X,&xhSzg?
break; Y8t Nwh
SortUtil.swap(queue,j,k); <]c#)xg
k = j; w. vY(s
} v2(U(Tt
} S8vx[<
*<?XTs<
} |9x%gUm
tgK x4
} 2!{N[*)
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SortUtil： Gk{W:866
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package org.rut.util.algorithm; 4 ;^g MI9
5UPPk$8`
import org.rut.util.algorithm.support.BubbleSort; z?I+u*rF6
import org.rut.util.algorithm.support.HeapSort; df!+T0
import org.rut.util.algorithm.support.ImprovedMergeSort; [Yn;G7cK
import org.rut.util.algorithm.support.ImprovedQuickSort; ::0aY;D2
import org.rut.util.algorithm.support.InsertSort; 5a8JVDLX^
import org.rut.util.algorithm.support.MergeSort; ;Sy/N||
import org.rut.util.algorithm.support.QuickSort; Th_Q owk
import org.rut.util.algorithm.support.SelectionSort; m\/>C|f\
import org.rut.util.algorithm.support.ShellSort; P4i3y{$V
_F3KFQ4,S-
/** CGCQa0
* @author treeroot lGl[^ 0
* @since 2006-2-2 OuMco+C
* @version 1.0 uAc@ Z-
*/ 5XI;<^n2
public class SortUtil { fm[_@L% x
public final static int INSERT = 1; bkxk i@t
public final static int BUBBLE = 2; oo;;y,`8py
public final static int SELECTION = 3; c6f|y_2
public final static int SHELL = 4; sg+ZQDF{x
public final static int QUICK = 5; ULV)0SB
public final static int IMPROVED_QUICK = 6; \I'f3
public final static int MERGE = 7; #4Dn@Gqh.Y
public final static int IMPROVED_MERGE = 8; xi;/^)r
public final static int HEAP = 9; ROPC |
|= tJ|
public static void sort(int[] data) { 20$F$YYuk
sort(data, IMPROVED_QUICK); R5m`;hF
} VfQMFb',o
private static String[] name={ AD~~e% s=
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" tx2Vyu
}; <WZ1-
V"w`!
private static Sort[] impl=new Sort[]{ {E;2&d
new InsertSort(), 1M7\:te*
new BubbleSort(), ?BWHr(J
new SelectionSort(), }f<fgY
new ShellSort(), HiQoRk
new QuickSort(), Y1$#KC
new ImprovedQuickSort(), )?!vJb"
new MergeSort(), I;`Ko_i
new ImprovedMergeSort(), +A]&AkTw
new HeapSort() Z}sG3p
}; d9`3EP)n
1mT|o_K{ T
public static String toString(int algorithm){ cmwzKu%
return name[algorithm-1]; kHt!S9r
} &:;/]cwj
H arFo
public static void sort(int[] data, int algorithm) { 3X88x-3
impl[algorithm-1].sort(data); mXxZM;P[
} dNR7e
-&qRo0^3
public static interface Sort { 3%It~o?
public void sort(int[] data); E9L!O.Q
} WE+sFaKq-
2(+RIu0d
public static void swap(int[] data, int i, int j) { <Cf7E
int temp = data; -_y~rx >
data = data[j]; ^2&O3s
data[j] = temp; O!#L#u53
} \SYPu,ZT
} &Iv\jhq