[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; f@,hO5h(_|
} >TH-Q[
int i1=l; q70YNk}
int i2=mid+1; +J}k_'4&
for(int cur=l;cur<=r;cur++){ n?7hp%}
if(i1==mid+1) Yg]FF`{p=
data[cur]=temp[i2++]; ;$k?&nhY
else if(i2>r) HfZ (U5~
data[cur]=temp[i1++]; J~nJpUyP*
else if(temp[i1] data[cur]=temp[i1++]; $! fz~
else AVdd?Ew
data[cur]=temp[i2++]; o} bj!h]N
} #I*ht0++
} 7csl1|U
SWe!9Y$
} 7,&3=R<
z}Mb4{d1
改进后的归并排序: '/]fZ|
!X#3w-K
package org.rut.util.algorithm.support; yF [@W<
)BMWC k
import org.rut.util.algorithm.SortUtil; CC]@`R5
Is#v6:#^
/** U:T5o]P<
* @author treeroot UJyiRP:#]>
* @since 2006-2-2 b(.o|d/P
* @version 1.0 yx`r;|ds}
*/ <_FF~lj
public class ImprovedMergeSort implements SortUtil.Sort { JsoWaD
f;qKrw
private static final int THRESHOLD = 10; P(W\aLp
BLYk <m
/* V< 9em7
* (non-Javadoc) (p#;6Xhf
* Td=]tVM
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) uDMUy"8&!
*/ z;z'`A
public void sort(int[] data) { FC/>L
int[] temp=new int[data.length]; A16-
mergeSort(data,temp,0,data.length-1); o*5e14W(:
} R}K5'`[%ZY
*T}dv)8
private void mergeSort(int[] data, int[] temp, int l, int r) { dwsy(g7
int i, j, k; V~%WKQ
int mid = (l + r) / 2; /*xmv $
if (l == r) eyl) uR
return; [^"(%{H
if ((mid - l) >= THRESHOLD) D%";!7u
mergeSort(data, temp, l, mid); 1.cUolnr
else 5{x[EXE'
insertSort(data, l, mid - l + 1); +T8XX@#
if ((r - mid) > THRESHOLD) #Z3I%bkw H
mergeSort(data, temp, mid + 1, r); 9zM4D
else @bVh?T0~F,
insertSort(data, mid + 1, r - mid); |2c!t$O@v
CI3_lWax%
for (i = l; i <= mid; i++) { %lq7; emtp
temp = data; Fw8X$SE"
} tg%WVy2
for (j = 1; j <= r - mid; j++) { 5eZg+ O
temp[r - j + 1] = data[j + mid]; +'6ea+$
} Z_ FL=S\
int a = temp[l]; HT;QepY3
int b = temp[r]; UY?]\4Om
for (i = l, j = r, k = l; k <= r; k++) { D;;o
if (a < b) { j]]ziz,E
data[k] = temp[i++]; "Qm~;x2kB
a = temp; V IRv
} else { 5a/ A_..+I
data[k] = temp[j--]; -|iA!w#31
b = temp[j]; =S7C(;=4
} EKJc)|8
} 8~L.6c5U
} =dw*B
YH'.Yj2
/** :!*;0~#
* @param data ~.y4 ,-
* @param l Ph!NYi,
* @param i CIs1*:Q9
*/ t2%bHIG}
private void insertSort(int[] data, int start, int len) { Nv$gKC6 ,G
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 0:(dl@I)@
} a(t<eN>b!
} sOtNd({
} 6W#F Ss~
} tFP;CW!E
di P4]/%1
堆排序： /JY ph^3][
^eT>R,aB
package org.rut.util.algorithm.support; ,Z\,IRn
\?]HqPibx
import org.rut.util.algorithm.SortUtil; *V<2\-
6'lT`E|
/** [q|Q]O0
* @author treeroot LRlk9:QD>
* @since 2006-2-2 ^V;lZtZ
* @version 1.0 Ognq*[om
*/ W&q5cz
public class HeapSort implements SortUtil.Sort{ ^xu)~:} i
x6cl(J}
/* (non-Javadoc) _(A+_|
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) B qiq
*/ Ta5iY }
public void sort(int[] data) { -tdON
MaxHeap h=new MaxHeap(); BE@H~<E J
h.init(data); RBojT
for(int i=0;i h.remove(); vBQ?S2f
System.arraycopy(h.queue,1,data,0,data.length); yDBgSO{d
} u2Z^iY
:s5<AT Q
private static class MaxHeap{ T%vbD*nt.
Ku,A}5-6
void init(int[] data){ 9%'HB\A
this.queue=new int[data.length+1]; }[R@HmN
for(int i=0;i queue[++size]=data; &=t(NI$
fixUp(size); s*U&[7P
} 4!RI2?4V
} _A0avMD}
c!FjHlAnP
private int size=0; J_br%AG<p
-2u+m
private int[] queue; ,rPyXS9Sa{
OL+40J
public int get() { >qGR^yvb
return queue[1]; cO?"
} R$,iDv.jI
g.VIe
public void remove() { #)eJz1~
SortUtil.swap(queue,1,size--); T#;*I#A:
fixDown(1); (ZR"O8
} SPm5tU
file://fixdown s~ZC!-[;
private void fixDown(int k) { aV%rq9Tp
int j; ?4||L8j2^
while ((j = k << 1) <= size) { <(lSNGv5N
if (j < size %26amp;%26amp; queue[j] j++; ?mUu(D:7D
if (queue[k]>queue[j]) file://不用交换 Uwil*Jh
break; o5A_j?t
SortUtil.swap(queue,j,k); ![C$H5
k = j; &l*dYzqq
} QnAf A%
} I*ni)Px
private void fixUp(int k) { rKO*A7vE
while (k > 1) { %QZ!Tb
int j = k >> 1; <"P '"SC
if (queue[j]>queue[k]) S;<?nz3
break; 3@bjIX`=H
SortUtil.swap(queue,j,k); ]xeyXw84k
k = j; LjAIB(*
} &_^<B7aC'k
} W{/z-&
FPFYH?;$
} C)kQi2T
F}4 0
} x5Pt\/ow
6242qb
SortUtil： ty=?SZF
2g545r.
package org.rut.util.algorithm; \<>%_y'/)h
a<36`#N
import org.rut.util.algorithm.support.BubbleSort; /Day5\Q#
import org.rut.util.algorithm.support.HeapSort; (6^k;j
import org.rut.util.algorithm.support.ImprovedMergeSort; BC[d={_-
import org.rut.util.algorithm.support.ImprovedQuickSort; pU'sADC
import org.rut.util.algorithm.support.InsertSort; R?Q-@N>wE
import org.rut.util.algorithm.support.MergeSort; N!~NQ-Re'
import org.rut.util.algorithm.support.QuickSort; aRP+?}b">
import org.rut.util.algorithm.support.SelectionSort; mR@Xt#
import org.rut.util.algorithm.support.ShellSort; mwhn=y#]*
Y%9F
/** rq?x]`u
* @author treeroot n(1"6
* @since 2006-2-2 &4FdA|9T
* @version 1.0 &3?yg61Ag
*/ sYgnH:t X
public class SortUtil { )5OU!c
public final static int INSERT = 1; 1dO8[5uM7a
public final static int BUBBLE = 2; aH"c0A
public final static int SELECTION = 3; ?d)|vX3Uf
public final static int SHELL = 4; EKD>c$T^
public final static int QUICK = 5; ?8m/]P/~
public final static int IMPROVED_QUICK = 6; 6p{x2>2y[
public final static int MERGE = 7; []Ea0jYu
public final static int IMPROVED_MERGE = 8; nd1*e
public final static int HEAP = 9; ,~iAoxD5jY
0G 1o3[F
public static void sort(int[] data) { ~` hcgCi%
sort(data, IMPROVED_QUICK); K),wAZI!7j
} xxn&{\ ?
private static String[] name={ g_X7@Dt
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" h)`vc#"65k
}; `:4cb$
ijYLf.R<
private static Sort[] impl=new Sort[]{ va;wQ~&
new InsertSort(), qZ}XjL
new BubbleSort(), N|LVLsK
new SelectionSort(), .>&fwG
new ShellSort(), [{*#cr f
new QuickSort(), %C:XzK-x
new ImprovedQuickSort(), vsR ^aVwVZ
new MergeSort(), LeCU"~
new ImprovedMergeSort(), es]m 6A
new HeapSort() N8vl< Mq
}; c.WT5|:qw
/XB1U[b
public static String toString(int algorithm){ 0xcqX!(
return name[algorithm-1]; 6iWuBsal
} vm4oaVi
W'$~mK\
public static void sort(int[] data, int algorithm) { `s$@6r$
impl[algorithm-1].sort(data); 6u}NI!he
} 7:%K-LeaQu
A-$BB=Ot
public static interface Sort { i=+6R
public void sort(int[] data); I:"`|eHxv
} <H/H@xQ8G
@=c='V]
public static void swap(int[] data, int i, int j) { Nb1lawC
int temp = data; 7d5x4^EYE
data = data[j]; /K<Nlxcm
data[j] = temp; B=Os?'2[
} vGw}e&YI
} `-\"p;Hp0