[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; 1<;\6sg
} eog\pMv
int i1=l; U<K|jsFo
int i2=mid+1; *Rz!i m|
for(int cur=l;cur<=r;cur++){ jQO*oq}
if(i1==mid+1) pHigxeV2
data[cur]=temp[i2++]; u<$S>
else if(i2>r) /5&3WG&<u
data[cur]=temp[i1++]; 9zmD6G!}t
else if(temp[i1] data[cur]=temp[i1++]; =`rppO
else F@B
data[cur]=temp[i2++]; 4 `j,&=
} 6\%r6_.d
} 4F}g(
-/@|2!d
} MX"A@p~H
cb\jrbj6
改进后的归并排序: ^- u[q- !
0~Um^q*'3
package org.rut.util.algorithm.support; +oE7~64LL
5w]DncdQ~
import org.rut.util.algorithm.SortUtil; &19lk
LZgwIMd
/** SJso'6 g
* @author treeroot K-N]h
* @since 2006-2-2 A9NOeE
* @version 1.0 MA~|y_V
*/ H(
public class ImprovedMergeSort implements SortUtil.Sort { =1%zI%
d/"gq}NT
private static final int THRESHOLD = 10; R>Z,TQU
SD)5?{6<
/* aS c#&{
* (non-Javadoc) A@9U;8k
* &*Q|d*CP
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) rhlW
*/ 8<wtf]x
public void sort(int[] data) { lCM6T;2ID
int[] temp=new int[data.length]; 9O(i+fM
mergeSort(data,temp,0,data.length-1); g(ZeFOn
} c#]'#+aH
]2hF!{wc
private void mergeSort(int[] data, int[] temp, int l, int r) { RTdD]pE8Q
int i, j, k; 2hjre3"?
int mid = (l + r) / 2; M Ak-=?t
if (l == r) /vFxVBX
return; $O;N/N:m
if ((mid - l) >= THRESHOLD) s!8J.hD'I
mergeSort(data, temp, l, mid); W}#QKZ)MB
else G%V=idU*"
insertSort(data, l, mid - l + 1); EuR!yD
if ((r - mid) > THRESHOLD) 1puEP*P
mergeSort(data, temp, mid + 1, r); B:R7[G;1
else _ Yb Eo+
insertSort(data, mid + 1, r - mid); +G3nn!gl4
gJ)h9e*m^
for (i = l; i <= mid; i++) { $@+p~)r(l
temp = data; \NvC
} ae9k[=-
for (j = 1; j <= r - mid; j++) { #+2:d?t
temp[r - j + 1] = data[j + mid]; [[Jv)?jm
} +X2 i/}
int a = temp[l]; k1QpX@
int b = temp[r]; /xX,
for (i = l, j = r, k = l; k <= r; k++) { a}[=_vb}K
if (a < b) { ;-Y]X(z>
data[k] = temp[i++]; mh!N^[=n
a = temp; g:~?U*f-
} else { ?~]1Gd
data[k] = temp[j--]; .N-'; %8
b = temp[j]; #z-iL!?
} V7KtbL#
} ($[r>)TG
} !Vp,YN+yN
Ee$"O6*!
/** $ ufSNx(F
* @param data S<2CG)K[
* @param l Q KcF1?
* @param i d[P>jl%7
*/ n)1
private void insertSort(int[] data, int start, int len) { <{-(\>f!9
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); cpr{b8Xb8&
} tF;& x g
} ,oBk>
} 110>p
} ~vjr;a(B
82Z[eo
堆排序： E,ZB;
Mo/2,DiI5
package org.rut.util.algorithm.support; "df13U"
A .jp<>
import org.rut.util.algorithm.SortUtil; \gJapx(
Hb@G*L$
/** 4$q)e<-
* @author treeroot _x,-d|9bd
* @since 2006-2-2 }]n>A
* @version 1.0 -Fok%iQ'5
*/ x|,aV=$o
public class HeapSort implements SortUtil.Sort{ `ykMh>*{
C-:SQf
/* (non-Javadoc) N18diP[C
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Nw3I
*/ 2EqsfU* I
public void sort(int[] data) { =yhn8t7@]
MaxHeap h=new MaxHeap(); N,sqrk]
h.init(data); H8o%H=I%
for(int i=0;i h.remove(); 8 /RfNGY
System.arraycopy(h.queue,1,data,0,data.length); E |GK3/
} 1K*f4BnDr~
?-.Ep0/
private static class MaxHeap{ q.,p6D
Ls$g-k%c@Q
void init(int[] data){ &[W3e3Asra
this.queue=new int[data.length+1]; *k@0:a(>
for(int i=0;i queue[++size]=data; 0]2B-o"kI
fixUp(size); HhY2`P8
} ;f ;*Q>!
} p.TiTFu/
yTq(x4]
private int size=0; kj<D4)
iEJQ#5))0
private int[] queue; wCC~tuTpr
:)+@qxTy
public int get() { )kY_"= d
return queue[1]; 23u1nU[0
} BhE~k?$9
#1qVFU
public void remove() { b/n8UxA
SortUtil.swap(queue,1,size--); ` HE:D2b
fixDown(1); b0z{"
} eB/hyC1
file://fixdown u{{xnyl?
private void fixDown(int k) { #iqhm,u7D
int j; yOn2}Z
while ((j = k << 1) <= size) { 8NF;k5
if (j < size %26amp;%26amp; queue[j] j++; ttAVB{kdo
if (queue[k]>queue[j]) file://不用交换 hiK[!9r
break; G(|(y=ck
SortUtil.swap(queue,j,k); EkB6- nz
k = j; `S/1U87
} eM1;Nl
} OL ]T+6X
private void fixUp(int k) { )zL"r8si
while (k > 1) { \Zz= 4 j
int j = k >> 1; lA Ck$E
if (queue[j]>queue[k]) 7L~ zI>2
break; h7W%}6Cqkw
SortUtil.swap(queue,j,k); f'i8Mm4IL
k = j; =Q=&Ucf_
} fFTvf0j
} B,m$ur#$
X5oW[
} X^_+%U
xO9]yULgu
} Z\gg<Q
\,cKt_{ u
SortUtil： j@?[vi
M@2Qn-I
package org.rut.util.algorithm; 8yo6v3JqC
+q_lYGTiO
import org.rut.util.algorithm.support.BubbleSort; A@
import org.rut.util.algorithm.support.HeapSort; WJh;p: q[
import org.rut.util.algorithm.support.ImprovedMergeSort; Ag-?6v
import org.rut.util.algorithm.support.ImprovedQuickSort; cmGj0YUQ1
import org.rut.util.algorithm.support.InsertSort; ga1gd~a
import org.rut.util.algorithm.support.MergeSort; %_@5_S
import org.rut.util.algorithm.support.QuickSort; DneSzqO"o
import org.rut.util.algorithm.support.SelectionSort; bmq XP
import org.rut.util.algorithm.support.ShellSort; 5t5S{aCDr
KutgW#+40
/** s3E~X
* @author treeroot m)]fJ_
* @since 2006-2-2 Mb2 L32
* @version 1.0 )}it,<
*/ <QoE_z`76
public class SortUtil { 7%"\DLA
public final static int INSERT = 1; e'?doP
public final static int BUBBLE = 2; ~ew**@N
public final static int SELECTION = 3; ^(m6g&$(
public final static int SHELL = 4; [?f.0q
public final static int QUICK = 5; g /@yK
public final static int IMPROVED_QUICK = 6; UG?C=Tf
public final static int MERGE = 7; 5@Lxbe( q
public final static int IMPROVED_MERGE = 8; d_7Xlp@
public final static int HEAP = 9; gjN!_^_
46?F+,Rzl
public static void sort(int[] data) { U#]eN[
sort(data, IMPROVED_QUICK); r5qx! >
} IOSoc 7+"
private static String[] name={ ]pP2c[;
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 16> >4U:Y
}; 674oL,
d|?(c~
private static Sort[] impl=new Sort[]{ >8fz ?A
new InsertSort(), L9YwOSb.
new BubbleSort(), e}4^N1'd/
new SelectionSort(), .5CELtR
new ShellSort(), #M9D" <pn}
new QuickSort(), #m$%S%s
new ImprovedQuickSort(), K,,@',
new MergeSort(), ,JBw$C
new ImprovedMergeSort(), Am?Hkh2
new HeapSort() w{O3P"N2
}; ]3y5b9DuW
&MQt2aL
public static String toString(int algorithm){ *u4X<oBS*
return name[algorithm-1]; #|_UA}Y
} AW;)_|xM
F#bo4'&>@
public static void sort(int[] data, int algorithm) { 68GGS`&
impl[algorithm-1].sort(data); -Tkd@
} Y&!]I84]
898wZ{9
public static interface Sort { 9-iB?a7{.
public void sort(int[] data); E!~2\qKT
} &b6@_C9
42LXL*-4
public static void swap(int[] data, int i, int j) { j.N\U#3KK
int temp = data; 8*PAgPj a
data = data[j]; hSKH#NS
data[j] = temp; Nu2]~W&
} #!&R7/ KdD
} )"Br,uIv:/