[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; :Z|lGH =
} c(jF^ 0~
int i1=l; d5$2*h{^v
int i2=mid+1; VXEA.Mko
for(int cur=l;cur<=r;cur++){ JEq0{_7
if(i1==mid+1) vUD,%@k9
data[cur]=temp[i2++]; ~7aBli=
else if(i2>r) ~#3h-|]*
data[cur]=temp[i1++]; UO(B>Abp
else if(temp[i1] data[cur]=temp[i1++]; .U|e#t
else '^pA%I2D
data[cur]=temp[i2++]; |}zvCD
} .`4N#EjP
} m[S6pqz
-'&4No
} Ezw(J[).C
x9}D2Ui
改进后的归并排序: :<Z*WoEmt
n|`L>@aw,
package org.rut.util.algorithm.support; sIQd}
It,m %5 Py
import org.rut.util.algorithm.SortUtil; Ql8E9~h
Qp8.D4^@3
/** bZ c&uq_
* @author treeroot sXm8KV
* @since 2006-2-2 -FA]%Pl<'
* @version 1.0 M,1Yce%+}
*/ ])paU8u
public class ImprovedMergeSort implements SortUtil.Sort { Gw3eO&X3i
Iw(2D(se
private static final int THRESHOLD = 10; #W`>vd}
!Irmc*;QE
/* '@'~_BBZP
* (non-Javadoc) \z!*)v/{-
* is&A_C7yg
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) s6<`#KFAg
*/ UEmNT9V
public void sort(int[] data) { S%n5,vwE
int[] temp=new int[data.length]; (pXZ$R:
mergeSort(data,temp,0,data.length-1); Isv@V.
} cQDn_Sjhi
t6p}LNm(V
private void mergeSort(int[] data, int[] temp, int l, int r) { pQr `$:ga
int i, j, k; xi=Z<G
int mid = (l + r) / 2; JzH\_,,
if (l == r) -DDH)VO
return; +f/G2qY!t
if ((mid - l) >= THRESHOLD) D&_Ir>"\
mergeSort(data, temp, l, mid); !FOPFPn
else VQE8hQ37
insertSort(data, l, mid - l + 1); "'p;Udt/Qm
if ((r - mid) > THRESHOLD) oj*5m+:>a
mergeSort(data, temp, mid + 1, r); t{?UNW
else %v=z|d5-3
insertSort(data, mid + 1, r - mid); S N_!o2F2
^S!^$d*
for (i = l; i <= mid; i++) { sl^i%xJ|l'
temp = data; ~5$V8yfx h
} '9cShe
for (j = 1; j <= r - mid; j++) { \IY)2C<e
temp[r - j + 1] = data[j + mid]; T'.U?G
} p~1,[]k
int a = temp[l]; J1DX}h]
int b = temp[r]; b*=eMcd
for (i = l, j = r, k = l; k <= r; k++) { PY7j uS[+
if (a < b) { H&\IgD
data[k] = temp[i++]; :NJb<%$
a = temp; *IWO ,!
} else { w^tNYN,i
data[k] = temp[j--]; lC&U9=7W
b = temp[j]; $/;:Xb=q
} g[fCvWm#d
} [.;$6C/?
} FEgM4m.(G<
Ho[Kxe[c
/** +^$FA4<~
* @param data @$'k1f(u>
* @param l ?H8w/{J
* @param i ?2hoY
*/ J$6tCFD
private void insertSort(int[] data, int start, int len) { td-2[Sy
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); $h1`-=\7
} LY}%|w
} vgRjd1k.\y
} &L}e&5
} 0-#SvTf>;:
@? 4-
堆排序： -1t"(v
xZAc~~9tD
package org.rut.util.algorithm.support; L?!*HS7m
Fy^*@&
import org.rut.util.algorithm.SortUtil; x,YC/J
A-<\?13uW
/** CuRYtY@9
* @author treeroot r@L19d)J
* @since 2006-2-2 Q?Vq/3K;
* @version 1.0 +')\,m "z
*/ Sz4YPl
public class HeapSort implements SortUtil.Sort{ )70-q yA
`*nVLtT Y
/* (non-Javadoc) WP-?C<Iw
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 82#7TX4
*/ :lz@G4=C
public void sort(int[] data) { KP" lz
MaxHeap h=new MaxHeap(); a$!|)+
h.init(data); *BzqAi0
for(int i=0;i h.remove(); d dB}mk6
System.arraycopy(h.queue,1,data,0,data.length); 4:<74B
} 5Mm><"0
bL\ab
private static class MaxHeap{ O'y8[<
''P.~~ezr5
void init(int[] data){ &Ji!*~sE
this.queue=new int[data.length+1]; 9`kxyh</
for(int i=0;i queue[++size]=data; ~i 'Ib_%h
fixUp(size); ;w";s$
} Wkw.z
} \C;cs&\Q
igFz~
private int size=0; !-1UJqO
$ )q?z.U
private int[] queue; T+p?VngF
1,,kU
public int get() { #7/;d=
return queue[1]; @]ydWd
} "<6X=|C
{xb8H
public void remove() { dLl/V3C6t
SortUtil.swap(queue,1,size--); -Z)j"J
fixDown(1); q_PxmPE@3v
} Vg9nb
file://fixdown 0OLE/T<Xv
private void fixDown(int k) { xu9K\/{7
int j; SYkLia(Ty
while ((j = k << 1) <= size) { v|Y:'5`V
if (j < size %26amp;%26amp; queue[j] j++; guJS;VC6U
if (queue[k]>queue[j]) file://不用交换 "w}}q>P+sA
break; ?pq#|PI)
SortUtil.swap(queue,j,k); ^PDz"L<*
k = j; |r2U4^
} !K:
} e=$p(
private void fixUp(int k) { x=(y
while (k > 1) { ]hY'A>4Uq
int j = k >> 1; ?;NC(Z,
if (queue[j]>queue[k]) 9UlR fl
break; AwrW!)n}
SortUtil.swap(queue,j,k); 4^h_n1A
k = j; 4%#Y)zo.e
} `)e5pK
} hUy"XXpr
82ay("ZY
} HD^Ou5YB
,z A9*
} h!l&S2)D`
:l~^un|<2Y
SortUtil： qRk&bF/
M*ZR+pq,
package org.rut.util.algorithm; )`;Q]?D
c^$_epc*
import org.rut.util.algorithm.support.BubbleSort; LLE\;,bv
import org.rut.util.algorithm.support.HeapSort; dO/iL7K&
import org.rut.util.algorithm.support.ImprovedMergeSort; rH@{[~p
import org.rut.util.algorithm.support.ImprovedQuickSort; 1.p2{
import org.rut.util.algorithm.support.InsertSort; g\]2?vY.
import org.rut.util.algorithm.support.MergeSort; ;MH((M/AN
import org.rut.util.algorithm.support.QuickSort; 5[<"_
import org.rut.util.algorithm.support.SelectionSort; _XLGXJ[B
import org.rut.util.algorithm.support.ShellSort; J^t-pU
UQZ<sp4v;
/** CJ+/j=i;~c
* @author treeroot iZsZSW \
* @since 2006-2-2 ^e*Tg&
* @version 1.0 L9(mY `d>"
*/ cE(P^;7D
public class SortUtil { 9i+OYWUO
public final static int INSERT = 1; Cq mtO?vne
public final static int BUBBLE = 2; ~<[$.8*
public final static int SELECTION = 3; byALM
public final static int SHELL = 4; H?-Byi
public final static int QUICK = 5; 8:*
public final static int IMPROVED_QUICK = 6; (9gL
public final static int MERGE = 7; P`ZzrN
public final static int IMPROVED_MERGE = 8; }J=>nL'B
public final static int HEAP = 9; c8uFLM j
7 YS'Tf
public static void sort(int[] data) { J+hiz3N
sort(data, IMPROVED_QUICK); 04;E^,V
} 4yOYw*X
private static String[] name={ S$O+p&!X
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" l|WdJn o
}; m/ D~D~
<%d/"XNg[D
private static Sort[] impl=new Sort[]{ |"}F cS y
new InsertSort(), Vf28R,~m
new BubbleSort(), MR")
new SelectionSort(), rw:z|-r
new ShellSort(), 6-"@j@l5<
new QuickSort(), 4oxAC; L
new ImprovedQuickSort(), 9i9'Rd`g
new MergeSort(), S*"uXTS
new ImprovedMergeSort(), uJxT)m!/
new HeapSort() dJYsn+
}; "AN*2)e4
o2AfMSt.
public static String toString(int algorithm){ 6z-ZJ|?
return name[algorithm-1]; NUSb7<s,&Y
} D\13fjjHlu
V\1pn7~V
public static void sort(int[] data, int algorithm) { dnEIR5%+.
impl[algorithm-1].sort(data); =@e3I)D#?i
} qr$h51C&
Sj=x.Tr\
public static interface Sort { > nHaMj
public void sort(int[] data); !TNp|U!
} &TgS$c5k
q4y P\B
public static void swap(int[] data, int i, int j) { *'?aXS -'r
int temp = data; bCa%$
data = data[j]; +(Q$GO%
data[j] = temp; kZb #k#
} asEk3
} w.7pD