[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; (Q}PeKM?jq
} H=JP3ID>{
int i1=l; ^%~Et>C
int i2=mid+1; 3&.TU5]`-
for(int cur=l;cur<=r;cur++){ FiV^n6-F`
if(i1==mid+1) >GdLEE'w
data[cur]=temp[i2++]; 9`LU=Xv/
else if(i2>r) h#(.(d
data[cur]=temp[i1++]; :d!i[W*
else if(temp[i1] data[cur]=temp[i1++]; tEi@p;Z>
else sW>P-
data[cur]=temp[i2++]; ?TL2'U|M
} }0k"SwX
} "uV0Oj9:
+=n x|:no
} #J%h!#3g
v:'P"uU;4
改进后的归并排序: X}65\6
J ,Qy`Y B
package org.rut.util.algorithm.support; /t%"Dh8x
/u" cl2|
import org.rut.util.algorithm.SortUtil; S*~Na]nS0
]1/W8z%
/** ?RrC~7~
* @author treeroot 5n|MA
* @since 2006-2-2 :Olj
* @version 1.0 hq|jC
*/ j8D$/
public class ImprovedMergeSort implements SortUtil.Sort { @F""wKnV
puf;"c6e'
private static final int THRESHOLD = 10; 18[?dV
Nlf&]^4(0
/* ql%]$`IV6
* (non-Javadoc) h=p-0 Mx .
* ^)eessZ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) N7j]yvE
*/ FM@W>+
public void sort(int[] data) { ;-<<1Jz/2
int[] temp=new int[data.length]; 1xFhhncf
mergeSort(data,temp,0,data.length-1); e!:?_z."
} .@x"JI>;
2vW,.]95M
private void mergeSort(int[] data, int[] temp, int l, int r) { NO0[`jy(
int i, j, k; ey9fbS ^I
int mid = (l + r) / 2; f:)K
if (l == r) tZJ 9}\r
return; 0qaG#&!
if ((mid - l) >= THRESHOLD) { V=:O
mergeSort(data, temp, l, mid); *;\ K5
else d~Z:$&r
insertSort(data, l, mid - l + 1); 5sffDEU]A
if ((r - mid) > THRESHOLD) kBDe*K.V
mergeSort(data, temp, mid + 1, r); Poylq]F
else cwDD(j
insertSort(data, mid + 1, r - mid); eBLHT
<O`q3u'l
for (i = l; i <= mid; i++) { '%JMnU
temp = data; ( .6tz
} R- ?0k:
for (j = 1; j <= r - mid; j++) { %_i0go,^
temp[r - j + 1] = data[j + mid]; hQW#a]]V:
} ['9OGV\
int a = temp[l]; iz,q8}/(
int b = temp[r]; c_DB^M!h
for (i = l, j = r, k = l; k <= r; k++) { K{[Fa,]'
if (a < b) { >Y*iy
data[k] = temp[i++]; o^.s!C%j
a = temp; ,XF6Xsg2
} else { cbg3bi
data[k] = temp[j--]; lw/ m0}it
b = temp[j]; 'amex
} F4aJr%!\6S
} '!|E+P-
} H 29 _ /
A.'`FtV
/** jAQ)3ON<
* @param data []]LyWk
* @param l D4x'
* @param i enfu%"(K)
*/ -%QEzu&
private void insertSort(int[] data, int start, int len) { zDQ\PZ~
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); b^=8%~?%4
} kY |=a
} f*R_\
} G%x,t-
} ,~68~_)
!AD,
堆排序： x:D<Mu#
{<V|Gr
package org.rut.util.algorithm.support; y O9pEO|W
m`4j|5
import org.rut.util.algorithm.SortUtil; & /FA>
0%L$TJ.''
/** Gm?"7R.
* @author treeroot {7MgN'4
* @since 2006-2-2 ywa.cq
* @version 1.0 eC1c`@C:
*/ EPUJa~4
public class HeapSort implements SortUtil.Sort{ [7t0[U~3?
<a/ZOuBzZ
/* (non-Javadoc) q~A|R
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) uS+b* :
*/ fqp7a1qQl
public void sort(int[] data) { FK,r<+h
MaxHeap h=new MaxHeap(); 0BU:(o&
h.init(data); *~aI>7H
for(int i=0;i h.remove(); CI]U)@\U
System.arraycopy(h.queue,1,data,0,data.length); AXv3jH,HF
} 7*8nUq
j2&OYg
private static class MaxHeap{ :r|P?;t(
p`V9+CA
void init(int[] data){ iF2IR{h
this.queue=new int[data.length+1]; -T="Ml&
for(int i=0;i queue[++size]=data; s_e#y{{C2
fixUp(size); X]qp~:4G
} kO\&mL& qD
} kTe<1^,m
'bqf?3W
private int size=0; #cg@Z
7!d<>_oH
private int[] queue; 6b5{
^L2Zo'y [
public int get() { ="PywZ
return queue[1]; Lm2cW$s
} 3n"&$q6
j1C0LP8
public void remove() { g&20F`.N*>
SortUtil.swap(queue,1,size--); (TK cSVR
fixDown(1); G37L 9IG-M
} ^rZ+H@p:6
file://fixdown J'&?=|
private void fixDown(int k) { )pj \b[
int j; 'aSORVq^e[
while ((j = k << 1) <= size) { oFA$X Y
if (j < size %26amp;%26amp; queue[j] j++; X=7vUb,\gB
if (queue[k]>queue[j]) file://不用交换 fwGz00C/U
break; lu(Omds+
SortUtil.swap(queue,j,k); +/^q"/f F
k = j; Z|7I }i
} f#JF5>o
} !{- 3:N7
private void fixUp(int k) { x-P_}}K 79
while (k > 1) { ~1z8G>R
int j = k >> 1; NxRiEe#m
if (queue[j]>queue[k]) 1JY90l$ME
break; t5[JN:an
SortUtil.swap(queue,j,k); J-,X0v"
k = j; J!qEj{
} @o.i2iG
} .oOt(K+
}LVE^6zyk
} WxI]Fcb<
0R{R=r]
} 2+rao2
"alO"x8t
SortUtil： JQv ZTwSI
Xrs~ove1V
package org.rut.util.algorithm; #nL0Hx7]E
YmF(o
import org.rut.util.algorithm.support.BubbleSort; 2QD B'xs3
import org.rut.util.algorithm.support.HeapSort; T</gWW
import org.rut.util.algorithm.support.ImprovedMergeSort; cnO4NUDv
import org.rut.util.algorithm.support.ImprovedQuickSort; y")>"8H
import org.rut.util.algorithm.support.InsertSort; G&B}jj
import org.rut.util.algorithm.support.MergeSort; X%qR6mMfT7
import org.rut.util.algorithm.support.QuickSort; x{w?X.Nt
import org.rut.util.algorithm.support.SelectionSort; ph.:~n>z
import org.rut.util.algorithm.support.ShellSort; $BN+SD!
(9QRg;
/** jWjK-q@Y
* @author treeroot }|,\?7,
* @since 2006-2-2 KPK!'4,cu
* @version 1.0 3om7LqcRo
*/ biuo.OG]
public class SortUtil { RB@gSHOc?
public final static int INSERT = 1; @k;3$
public final static int BUBBLE = 2; DxG'/5jQ[
public final static int SELECTION = 3; Y\F H4}\S
public final static int SHELL = 4; KV(W|~+rM
public final static int QUICK = 5; LA3,e (e
public final static int IMPROVED_QUICK = 6; T"lqPbK
public final static int MERGE = 7; MO+0]uh:
public final static int IMPROVED_MERGE = 8; Ft>8 YYyU
public final static int HEAP = 9; l"g%vS,;`
"TCbO`mg
public static void sort(int[] data) { e 2&i
sort(data, IMPROVED_QUICK); KAaeaiD
} %5w)}|fw
private static String[] name={ yL,B\YCf8
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 1Vvx@1
}; Q|r1.
TuR?r`P%
private static Sort[] impl=new Sort[]{ FC.-u"V
new InsertSort(), SQvB)NOw
new BubbleSort(), EnAw8Gm*
new SelectionSort(), ?XrTZ{5'
new ShellSort(), {x$#5PW
new QuickSort(), 6XqO'G
new ImprovedQuickSort(), JH,+F
new MergeSort(), T0C'$1T
new ImprovedMergeSort(), ,o6: V]a
new HeapSort() 7hE=+V8
}; Jk{2!uP
5Uz(Bi
public static String toString(int algorithm){ Qc/J"<Lx
return name[algorithm-1]; M#,+p8
} {[iQRYD0|
@K>Pw arl
public static void sort(int[] data, int algorithm) { |bUmkw
impl[algorithm-1].sort(data); z<XS"4l?W
} g#NUo/
*]u/,wCB
public static interface Sort { jl7-"V>j?;
public void sort(int[] data); |]^! 4[!U
} \}c50}#0
lsf?R'1
public static void swap(int[] data, int i, int j) { eu/Sp3@v
int temp = data; s47"JKf"
data = data[j]; ywBo9|%T
data[j] = temp; l;i u`
} breVTY7 S
} DSa92:M}