[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; v1} $FmHL"
} m*'#`vIbb
int i1=l; %63<Iz"
int i2=mid+1; dG| iA]
for(int cur=l;cur<=r;cur++){ =X`/.:%|[
if(i1==mid+1) M1^pW63
data[cur]=temp[i2++]; qAm%h\
else if(i2>r) 0zd1:*KR,
data[cur]=temp[i1++]; c[5>kQ-nq
else if(temp[i1] data[cur]=temp[i1++]; vF_?1|*|
else +,smjg:O
data[cur]=temp[i2++]; ' o5,P/6
} /ZczfM\
} *"#>Ov>
M! s&<Bi
} pY2nv/
MG~^>
改进后的归并排序: I{E10;
A`@we
package org.rut.util.algorithm.support; f.,-KIiF
4U((dx*m
import org.rut.util.algorithm.SortUtil; Q/< $ (Y
)P$ IXA\
/** 3}H94H)]a
* @author treeroot !u^(<.xJ
* @since 2006-2-2 k8h$#@^
* @version 1.0 OvFZ&S[
*/ O6`@'N>6P
public class ImprovedMergeSort implements SortUtil.Sort { X 6>Pq
<_NF
private static final int THRESHOLD = 10; $rdA0%;
`Z{7Ut^)
/* TPkm~>zD.
* (non-Javadoc) xT@\FwPr
* nI6`/
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ^,?]]=mE
*/ Abj`0\
public void sort(int[] data) { [p]Ayo$~
int[] temp=new int[data.length]; 7c+u+Yet
mergeSort(data,temp,0,data.length-1); }g3)z%Xe'[
} {&/q\UQ
2qN6{+]
private void mergeSort(int[] data, int[] temp, int l, int r) { <uA|nYpp
int i, j, k; Z!#zr@'k
int mid = (l + r) / 2; Q i?
if (l == r) 7Npz {C{I
return; 39u!j|VH
if ((mid - l) >= THRESHOLD) #fa~^]EM]
mergeSort(data, temp, l, mid); gP<l
else 50CU|
insertSort(data, l, mid - l + 1); N?~K9jGx(
if ((r - mid) > THRESHOLD) ?4xTA
mergeSort(data, temp, mid + 1, r); =6? 3c\
else H*l8,*M}
insertSort(data, mid + 1, r - mid); /9[nogP
eX}uZR
for (i = l; i <= mid; i++) { {4#'`Eejj
temp = data; T9u/|OP
} B=9|g1e
for (j = 1; j <= r - mid; j++) { |vzGFfRI
temp[r - j + 1] = data[j + mid]; h8nJ$jg
} ?+51 B-
int a = temp[l]; -FJ5N}R
int b = temp[r]; 65MR(+3
for (i = l, j = r, k = l; k <= r; k++) { {+Eq{8m`
if (a < b) { 5HmX-+XpK
data[k] = temp[i++]; Xmtq~}K>
a = temp; 7XdLZ4ub
} else { lqu1H&
data[k] = temp[j--]; &C?]n.A
b = temp[j]; 5?QR
} ]` 3;8,
} ji">} -
} h(>4%hF
Cgt{5
/** Y0U:i.)
* @param data p=eSHs{>A
* @param l Ww@Rewo
* @param i h4ZrD:D0\
*/ 2c}>}A4
private void insertSort(int[] data, int start, int len) { cp[k[7XGD
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); _t3n<
} I,.>tC
} w${=]h*2
} Cvq2UNz(R
} y\Zx{A[
8j8FQ!M
堆排序： 3TO$J
3<?#*z4]_
package org.rut.util.algorithm.support; I lvjS^j
<0pBu7a
import org.rut.util.algorithm.SortUtil; O7:JG[tR*
Haiuf)a
/** a&|aK+^8;
* @author treeroot 6EJ,czt(
* @since 2006-2-2 Q;SMwCB0M
* @version 1.0 OZ0q6"
*/ h@/c76}f6p
public class HeapSort implements SortUtil.Sort{ |UE&M3S
,D>$N3;
/* (non-Javadoc) "<NQ2Vr]5
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5G=2=E
*/ KI#),~nS
public void sort(int[] data) { <T<?7SE+
MaxHeap h=new MaxHeap(); +.5 /4?
h.init(data); |no '^
for(int i=0;i h.remove(); *cJ GrLC
System.arraycopy(h.queue,1,data,0,data.length); 9aYCU/3
} H 2\KI(
T+RfMEdr
private static class MaxHeap{ KZJ;O7'`
aw {?UvL&
void init(int[] data){ ;E(%s=i
this.queue=new int[data.length+1]; <SbW QbN
for(int i=0;i queue[++size]=data; $D\SueZ
fixUp(size); G5?Dt-;I
} pzHN:9r
} U!TFFkX[
]xbR:CYJ
private int size=0; ,J~kwJ$L
cl30"WK!
private int[] queue; td&W>(3d
cYq<.A(hVj
public int get() { z^O>'9#
return queue[1]; 80LKxA;5N
} b\F(.8
-#|J
public void remove() { _6(QbY'JV`
SortUtil.swap(queue,1,size--); *EvnN:
fixDown(1); +QqYf1@F
} ) j_g*<
file://fixdown A9!%H6
private void fixDown(int k) { 7;+:J;xf66
int j; Zw`Xg@;xP
while ((j = k << 1) <= size) { fXEF]C
if (j < size %26amp;%26amp; queue[j] j++; AMGb6enl
if (queue[k]>queue[j]) file://不用交换 -!k"*P
break; vn9_tL&
SortUtil.swap(queue,j,k); he;&KzEu
k = j; u+~Ta
} p{[Ol
} *O+G}_}
private void fixUp(int k) { -P^ 6b(
while (k > 1) { nPD5/xW
int j = k >> 1; rB~x]5TH
if (queue[j]>queue[k]) 6$lj$8\
break; 8S"vRR
SortUtil.swap(queue,j,k); :"#EQq]ct
k = j; AbC/
} @or&GcQ*
} ;|5m;x/a
S9U,so?
} Kzfa4C
)#N)w5DU
} m$Lq#R={Z
d;daYjOm
SortUtil： T&
51u8.%{4
package org.rut.util.algorithm; !U/iY%NE
]g2Y/\)a
import org.rut.util.algorithm.support.BubbleSort; 9#IKb:9k
import org.rut.util.algorithm.support.HeapSort; al.~[T-O+
import org.rut.util.algorithm.support.ImprovedMergeSort; y+hC !-
import org.rut.util.algorithm.support.ImprovedQuickSort; $WI=a-;_e
import org.rut.util.algorithm.support.InsertSort; DBI[OG9
import org.rut.util.algorithm.support.MergeSort; ^w/_hY!4/
import org.rut.util.algorithm.support.QuickSort; qM~ev E$%
import org.rut.util.algorithm.support.SelectionSort; SxdH%agM
import org.rut.util.algorithm.support.ShellSort; _=Ed>2M)no
NjIe2)}'
/** 8%nb1CA
* @author treeroot gBA UrY%]
* @since 2006-2-2 6hv4D`d;o
* @version 1.0 W2e~!:w
*/ SQ9s
public class SortUtil { t9685s
public final static int INSERT = 1; !~u;CMR
public final static int BUBBLE = 2; NpG5$?
public final static int SELECTION = 3; ],YIEOx6
public final static int SHELL = 4; -K9bC3H
public final static int QUICK = 5; p,.+i[V
public final static int IMPROVED_QUICK = 6; ^p?O1qTg
public final static int MERGE = 7; 7{e0^V,\k
public final static int IMPROVED_MERGE = 8; z|;7;TwA
public final static int HEAP = 9; BFmd`#{l
?>SC:{(
public static void sort(int[] data) { 8M9 &CsT6
sort(data, IMPROVED_QUICK); j'Z};3y
} [#S}L(
private static String[] name={ H|T!}M>
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" I0trHrX9
}; G%_6"s
CZcnX8P'8
private static Sort[] impl=new Sort[]{ }J"}5O2,b
new InsertSort(), -'*\KA@u
new BubbleSort(), Z6F>SL
new SelectionSort(), g!;k$`@{E'
new ShellSort(), Mn7nS:
new QuickSort(), St}j^i
new ImprovedQuickSort(), k\W%^Z
new MergeSort(), [HGGXgN
new ImprovedMergeSort(), >bWx!M]
new HeapSort() ?kEcYD
}; m{4e+&S|
L8("1_
public static String toString(int algorithm){ MQ>.^]B]o
return name[algorithm-1]; {_ti*#
} ">PpC]Y1
b1Bu5%bt,:
public static void sort(int[] data, int algorithm) { /*\pm!]._^
impl[algorithm-1].sort(data); <8nl}^d5
} eJFGgJRIvF
!4cO]wh5
public static interface Sort { Ta^l1]9.*
public void sort(int[] data); chv0\k"'
} N% /if
~=qJSb
public static void swap(int[] data, int i, int j) { m2{3j[
int temp = data; ij&_>
data = data[j]; @|kBc.(]
data[j] = temp; $Ay j4|_-
} \lwYDPY:
} x-O9|%aRJ