[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; BJ7m3[lz
} &&{_T4
int i1=l; "r.eN_d
int i2=mid+1; _.$g?E/(
for(int cur=l;cur<=r;cur++){ d(j|8/tpA
if(i1==mid+1) 9mfP9
data[cur]=temp[i2++]; ixIfJ
else if(i2>r) N"#=Q=)x
data[cur]=temp[i1++]; 5K %
else if(temp[i1] data[cur]=temp[i1++]; Fwv(J_'q
else fW.)!EPO
data[cur]=temp[i2++]; p}R3AJ
} rJ}k!}G
} i2+vUl|;Z
>6zXr.
} ]NgEN
Hze~oAP+
改进后的归并排序: [}!obbM
h>A}vI*:
package org.rut.util.algorithm.support; c<j+"
&nEQ`3~F
import org.rut.util.algorithm.SortUtil; by%k*y
yu]nK-Y7S
/** H@pF3gh
* @author treeroot !^<%RT9@|
* @since 2006-2-2 }X[wWH
* @version 1.0 h$eVhN&Vv
*/ ia}V8i
public class ImprovedMergeSort implements SortUtil.Sort { |qTS{qQh{L
8q#Be1u<s2
private static final int THRESHOLD = 10; {QRrAi
p-;I"uKv
/* QnNddCiu=
* (non-Javadoc) p6e9mSs
* U:o(%dk
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 6t(I.>-
*/ dY%>C75O
public void sort(int[] data) { a4iq_F#NF
int[] temp=new int[data.length]; 4P\?vz"
mergeSort(data,temp,0,data.length-1); .8.LW4-ff
} xnm!$ $W
W6[# q%o
private void mergeSort(int[] data, int[] temp, int l, int r) { z?i{2Fz6
int i, j, k; X6g{qzHg_
int mid = (l + r) / 2; V}UYr Va#9
if (l == r) !K$qh{n
return; JHZ`LWq
if ((mid - l) >= THRESHOLD) K<Qy1y~[
mergeSort(data, temp, l, mid); >*aqYNft
else 9F^rXY.
insertSort(data, l, mid - l + 1); UjI-<|
if ((r - mid) > THRESHOLD) oDEvhNT
mergeSort(data, temp, mid + 1, r); YjM_8@<
else C%y!)v_x
insertSort(data, mid + 1, r - mid); QL4BD93v
Lw!Q*3c
for (i = l; i <= mid; i++) { 7-Yn8Gq
temp = data; RY]Vo8
} ;_vo2zl1
for (j = 1; j <= r - mid; j++) { 7v^V]&&s
temp[r - j + 1] = data[j + mid]; #fR~7KR
} XY1eeB-
int a = temp[l]; nm597WeZp
int b = temp[r]; 8hx 3pvmk
for (i = l, j = r, k = l; k <= r; k++) { E)=X8y
if (a < b) { [nnX,;
data[k] = temp[i++]; j[Xci<m
a = temp; dW8M^A&
} else { 3l8k O
data[k] = temp[j--]; :>'4@{'
b = temp[j]; {a `#O9
} ,m-/R
} 8QYM/yAM
} YzD6S*wb
{KO+t7'Q
/** PLmf.hD\
* @param data )D1=jD(
* @param l uNn]hl|x
* @param i .}.63T$h9
*/ 5,<:|/r
private void insertSort(int[] data, int start, int len) { ?Q XS?
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ucVn `
} 9M&uQccY
} qrtA'fU
} WKB8k-.]ww
} A!&hjV`
6-\ghPo
堆排序： Fl'+ C
sC=fXCGW\p
package org.rut.util.algorithm.support; f*}H4H EO
jZ8#86/#{
import org.rut.util.algorithm.SortUtil; 1hQeuG
+bbhm0f
/** i!jR>+
* @author treeroot lrXi*u]
* @since 2006-2-2 C/{tvY /o
* @version 1.0 eZ^-gk?
*/ aF~ 0\XC
public class HeapSort implements SortUtil.Sort{ {IlX@qWr
`1eGsd,f
/* (non-Javadoc) (K(6`~
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) JWuF ?<+k
*/ !VJ5(b
public void sort(int[] data) { 9<ev]XaSl
MaxHeap h=new MaxHeap(); rprtp5Cg
h.init(data); V!Q1o!J
for(int i=0;i h.remove(); Alsr6uLT1
System.arraycopy(h.queue,1,data,0,data.length); -%*w&',G
} 0DFxVH_xN
C/w!Y)nB=
private static class MaxHeap{ Xt!%W
`f9I#B
void init(int[] data){ UF)4K3X
this.queue=new int[data.length+1]; 7Q(5Nlfcz
for(int i=0;i queue[++size]=data; 7Q>*]
fixUp(size); )Bq~1M 2
} smM*HDK
} C)r!;u)AZH
w/`I2uYu
private int size=0; -m.SN>V
f;k'dqlv
private int[] queue; >%~%O`+
A\jX#gg
public int get() { RU1+-
return queue[1]; \v'\ Ea~
} Q]q`+ Z65
1qw*mV;W)_
public void remove() { ]i3 1@O
SortUtil.swap(queue,1,size--); 3',|HA /x
fixDown(1); }BpCa6SAs
} CqRG !J
file://fixdown BN?OvQ
private void fixDown(int k) { ?>_[hZ
int j; WzC_M>_
while ((j = k << 1) <= size) { IfH*saN7
if (j < size %26amp;%26amp; queue[j] j++; |G5Me
if (queue[k]>queue[j]) file://不用交换 %b H1We
break; KKz{a{ePY%
SortUtil.swap(queue,j,k); #sOkD
k = j; ItZqLUJm
} Fnnk}I}
} 1%?J l~M
private void fixUp(int k) { #N=!O/Y
while (k > 1) { ib4shaN`
int j = k >> 1; AQ>8]`e`
if (queue[j]>queue[k]) ,,Dwb\B}
break; 3}@!TI
SortUtil.swap(queue,j,k); S9$*w!W
k = j; X0,?~i6Q
} 1Fado$# 7
} 7n-;++a5]
zF6]2Y?k%
} R(?g+:eCpM
iY /N%T;
} ?3Ytn+Py
=+T$1
SortUtil： Qz+hS\yx
pV>M,f
package org.rut.util.algorithm; s/,wyxKd
kAF[K,GG
import org.rut.util.algorithm.support.BubbleSort; e%(,)WlTaU
import org.rut.util.algorithm.support.HeapSort; |z!Y,zaX
import org.rut.util.algorithm.support.ImprovedMergeSort; 3J2j5N:g
import org.rut.util.algorithm.support.ImprovedQuickSort; j0p'_|)(
import org.rut.util.algorithm.support.InsertSort; 6iiH+Nc
import org.rut.util.algorithm.support.MergeSort; -/>SdR$D7
import org.rut.util.algorithm.support.QuickSort; C0xjM0
import org.rut.util.algorithm.support.SelectionSort; X 8V^
import org.rut.util.algorithm.support.ShellSort; t,*hxzD"
jXBAo
/** r>=)Y32Q
* @author treeroot \;z*j|;B
* @since 2006-2-2 { XN"L3A
* @version 1.0 [>IAS>
*/ m'))prl
public class SortUtil { IpX>G]"-C
public final static int INSERT = 1; ^6*2a(S&
public final static int BUBBLE = 2; d66 GO];"
public final static int SELECTION = 3; =tJ}itcJ'
public final static int SHELL = 4; pq 4/>WzE
public final static int QUICK = 5; $"d< F3k
public final static int IMPROVED_QUICK = 6; YxEc(a"
public final static int MERGE = 7; K5O#BBX=
public final static int IMPROVED_MERGE = 8; zFy0SzF
public final static int HEAP = 9; wzr3y}fCe
u? a*bW
public static void sort(int[] data) { n+Ia@$|m
sort(data, IMPROVED_QUICK); nM+(
} x \.qzi
private static String[] name={ vJheM*C
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" |U*wMYC
}; !2)$lM1@J
SjT8eH #
private static Sort[] impl=new Sort[]{ 3d qj:4[f
new InsertSort(), ,k*g`OTW
new BubbleSort(), l2))StEm
new SelectionSort(), WUQlAsme
new ShellSort(), YQyf:xJ
new QuickSort(), ~kdxJP"
new ImprovedQuickSort(), 2|xNT9RW
new MergeSort(), rZ0+mS'/G
new ImprovedMergeSort(), <,%qt_ !
new HeapSort() W}<'Y@[,
}; lg)jc3
1gEeZ\B-&
public static String toString(int algorithm){ 481SDG[b
return name[algorithm-1]; dqU bJc]
} ?mdgY1
a#iJXI
public static void sort(int[] data, int algorithm) { $ e<&7
impl[algorithm-1].sort(data); iez@j
} -^m]Tb<u
29(s^#e8A
public static interface Sort { q[l!kC+Eh
public void sort(int[] data); \,<5U F0
} zJnF#G
VCzmTnD
public static void swap(int[] data, int i, int j) { EgAM,\
int temp = data; W0n/B&C
data = data[j]; }<y-`WB
data[j] = temp; VKW9Rn9Qg
} |/u&%w?W
} Byx8`Cx1