[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; o/zCXZnw#
} X2uX+}h*tA
int i1=l; 0l=}v%D
int i2=mid+1; EC~t'v
for(int cur=l;cur<=r;cur++){ JB(;[#'~
if(i1==mid+1) R,\ r{@yrz
data[cur]=temp[i2++]; 0c5_L6_z
else if(i2>r) V3oAZ34)
data[cur]=temp[i1++]; 1 ~7_!
else if(temp[i1] data[cur]=temp[i1++]; VL{#.;QQa
else `aUp&8{
data[cur]=temp[i2++]; @,MdvR+a
} Vd0GTpB?1
} qj6`nbZ{va
t4IJ%#22
} 0uz"}v)
Rpk`fxAO
改进后的归并排序: `"H?nf0
4cQ5E9
package org.rut.util.algorithm.support; mvgm o
Flxo%g};
import org.rut.util.algorithm.SortUtil; `0^i #
*jK))|%
/** i-?zwVmn
* @author treeroot @;6}xO2
* @since 2006-2-2 cWc)sb
* @version 1.0 re!8nuBsA
*/ ]CZLaID~
public class ImprovedMergeSort implements SortUtil.Sort { vVYduvw
V8yX7yx
private static final int THRESHOLD = 10; pNlisS
^JtHTLHL=
/* Y*k<NeDyn
* (non-Javadoc) WO-WoPO
* ^eW.hNg
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ]uvbQ.l_t
*/ 5gD)2Q6
public void sort(int[] data) { Y/0O9}hf
int[] temp=new int[data.length]; .dCP8|
mergeSort(data,temp,0,data.length-1); u =kSs
} 6Qb)Uq3}]
*?D2gaCta
private void mergeSort(int[] data, int[] temp, int l, int r) { ? sW`**j
int i, j, k; $/TA5h
int mid = (l + r) / 2; ? ~Zrd
if (l == r) <S$21NtM87
return; i8YgG0[)
if ((mid - l) >= THRESHOLD) wWw/1i:|'
mergeSort(data, temp, l, mid); k_n{Mss'9
else n ;5?^Un%
insertSort(data, l, mid - l + 1); LtztjAm.
if ((r - mid) > THRESHOLD) uAs*{:4n
mergeSort(data, temp, mid + 1, r); LH#LBjOZk
else l :Nxl
insertSort(data, mid + 1, r - mid); z8|9WZ:
O{#Cddt:r
for (i = l; i <= mid; i++) { -C ON
temp = data; G=cH61
} )6E*Qz
for (j = 1; j <= r - mid; j++) { A9UaLSe
temp[r - j + 1] = data[j + mid]; !>y}Xq{bm3
} +)JqEwCrq
int a = temp[l]; |u;BAb
int b = temp[r]; /JeqoM"x
for (i = l, j = r, k = l; k <= r; k++) { W<91m*
if (a < b) { &PuJV +y
data[k] = temp[i++]; s|r7DdI
a = temp; THgzT\_zq
} else { `U_>{p&x
data[k] = temp[j--]; XOg(k(&T
b = temp[j]; !otq X-
} W4*BR_H&*
} ~e<'t4
} K}`p_)(
K4/P(*r`
/** DG*o w^
* @param data @Q\$dneY
* @param l %C6zXiO"
* @param i '&:x_WwVrO
*/ 8+a<#?;
private void insertSort(int[] data, int start, int len) { {2k< k(,
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 0nz@O^*g(
} bC>>^?U1m
} pt%~,M _
} 1+tt'
} DgT.Lku?
$;i$k2n:
堆排序： 60%~+oHi~
Usf"K*A
package org.rut.util.algorithm.support; dh;MpE
0 ,Qj:
import org.rut.util.algorithm.SortUtil; y?z_^ppj
gVA}?t;
/** tD7C7m
* @author treeroot cvV?V\1f
* @since 2006-2-2 3b)T}g
* @version 1.0 VgsCwJ9w
*/ 2<o[@w
public class HeapSort implements SortUtil.Sort{ /W$y"!^)J1
bC4*w O
/* (non-Javadoc) #1dTM-
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *_/eAi/WG
*/ @EP{VV
public void sort(int[] data) { RQS:h]?:l
MaxHeap h=new MaxHeap(); *CY6 a
h.init(data); '"]>`=R
for(int i=0;i h.remove(); 0?Tk*X
System.arraycopy(h.queue,1,data,0,data.length); W[X!P)=w]
} 5?{ >9j5
_l!U[{l*d
private static class MaxHeap{ *o e0=
w4fJ`,
void init(int[] data){ &PBWJ?@O)r
this.queue=new int[data.length+1]; a.}:d30
for(int i=0;i queue[++size]=data; 4R*<WdT(
fixUp(size); h/0-Mrk;e
} lmtQr5U
} N<Z)b!o%u
7{+Io
private int size=0; `b#nC[b6|v
X:SzkkVl7
private int[] queue; FQ|LA[~
;TV'PJ
public int get() { $,&gAU
return queue[1]; \B>[je-d
} ? W2I1HEy
FM"GK '
public void remove() { COan)<Ku
SortUtil.swap(queue,1,size--); nL+YL
fixDown(1); 7Ysy\gZ&wp
} "Yfr"1RmO
file://fixdown AYPf)K;%
private void fixDown(int k) { BV }(djx
int j; x)#<.DX
while ((j = k << 1) <= size) { <7FP"YU
if (j < size %26amp;%26amp; queue[j] j++; ttbQergS
if (queue[k]>queue[j]) file://不用交换 M~z(a3@[V
break; }lC64;yo
SortUtil.swap(queue,j,k); g"Q}h
k = j; 3h[:0W!C]
} q(&^9"
} /[nZ#zj!3
private void fixUp(int k) { cEdz;kbUM
while (k > 1) { *<.WL"Qhl
int j = k >> 1; Yn$>QS 4
if (queue[j]>queue[k]) SD|4ybK>d
break; c5iormb"#
SortUtil.swap(queue,j,k); m.HX2(&\3
k = j; qtdxMX]iR
} 9#s95RO
} iB}LnC:
S4k^&$;
} 36^C0uNdX
9&XV}I,~?|
} h$aew63
VM<oUKh_3
SortUtil： V 4\^TO`q=
1%/ NL?8#
package org.rut.util.algorithm; hk"9D<&i>b
a_ 9|xI
import org.rut.util.algorithm.support.BubbleSort; 6_9:Eb=^v!
import org.rut.util.algorithm.support.HeapSort; `b^#quz
import org.rut.util.algorithm.support.ImprovedMergeSort; oA!5dpNhU
import org.rut.util.algorithm.support.ImprovedQuickSort; - 5o<Q'(
import org.rut.util.algorithm.support.InsertSort; k}I5x1>&
import org.rut.util.algorithm.support.MergeSort; C>JekPeM
import org.rut.util.algorithm.support.QuickSort; x tYV"
import org.rut.util.algorithm.support.SelectionSort; $K6?(x_
import org.rut.util.algorithm.support.ShellSort; V`R)#G>IH%
"5o;z@(
/** RFZU}.*K$
* @author treeroot Pghva*&
* @since 2006-2-2 AT%* ~tr
* @version 1.0 As6)_8w
*/ Yhc6P%{Z^
public class SortUtil { M!&_qj&N,
public final static int INSERT = 1; HIPcZ!p
public final static int BUBBLE = 2; IFC%%It5,
public final static int SELECTION = 3; 0.J1!RIK/
public final static int SHELL = 4; {FV,j.D
public final static int QUICK = 5; vB{;N
public final static int IMPROVED_QUICK = 6; .-('C> @
public final static int MERGE = 7; k7yv>iN
public final static int IMPROVED_MERGE = 8; y"|K |QT
public final static int HEAP = 9; t`<}UWAH+
C}(<PNT
public static void sort(int[] data) { zqekkR]
sort(data, IMPROVED_QUICK); ]ZR{D7.?
} P<cMP)+K
private static String[] name={ >+Sv9S
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 5eiZs
}; {(m+M
ibZt2@GB)I
private static Sort[] impl=new Sort[]{ pPiYPfs
new InsertSort(), TZ&4
new BubbleSort(), n=<NFkeX
new SelectionSort(), ^MWEfPt
new ShellSort(), [ 5CS}FB
new QuickSort(), :"OZc7 ~
new ImprovedQuickSort(), RsqRR`|X?
new MergeSort(), !q~X*ZKse
new ImprovedMergeSort(), 7gVh!rm
new HeapSort() J^+_8
}; #;\L,a|>*
MO));M)
public static String toString(int algorithm){ Lf,CxZL5
return name[algorithm-1]; 'L>&ZgLy
} rQu
+Fc ET
public static void sort(int[] data, int algorithm) { KXoL,)Hl
impl[algorithm-1].sort(data); blRY7
} kP!%|&w;
Tm%$J
public static interface Sort { fs2mN1
public void sort(int[] data); XPHQAo[(s
} r.^0!(d
PtQQZ"ept
public static void swap(int[] data, int i, int j) { k%EWkM)?
int temp = data; 2gQY8h8
data = data[j]; Pcs^@QP
data[j] = temp; 8 *4@-3Sx
} _-4n~(
} A|p@\3P*A