[JAVA]用Java实现的各种排序

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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; lzJ[`i.
} _|VWf8?\
int i1=l; IO,ddVO
int i2=mid+1; v!\\aG/
for(int cur=l;cur<=r;cur++){ <M(Jqb cWa
if(i1==mid+1) {o2pCH
data[cur]=temp[i2++]; AOT +4*)%
else if(i2>r) p$>e{-u
data[cur]=temp[i1++]; _/@VV5Mq
else if(temp[i1] data[cur]=temp[i1++]; F\' ^DtB
else N!7r~B
data[cur]=temp[i2++]; .AEOf0t
} ZG=B'4W
} 'S_kD! BO
wz!a;]agg
} ^tWt"GgC
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改进后的归并排序: K+3dwQo
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package org.rut.util.algorithm.support; 0FA N9u2
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import org.rut.util.algorithm.SortUtil; ``%uq)G=D
W<J".2D
/** aBo8?VV]8
* @author treeroot ]_cBd)3P}
* @since 2006-2-2 YeN /J.R
* @version 1.0 ttEQgkd`
*/ Z3:M%)e_u$
public class ImprovedMergeSort implements SortUtil.Sort { I6bekOvP
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private static final int THRESHOLD = 10; Irk@#,{<
HPc7Vo(
/* deD%E-Ja
* (non-Javadoc) r"yA=d'c
* JsNqijVC
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) F[q:jY
*/ .C]V==z`[4
public void sort(int[] data) { ^P5+ _P
int[] temp=new int[data.length]; jy=dB-&
mergeSort(data,temp,0,data.length-1); rgQ6/3}qc
} A=Au>"nAA
O>zPWVwa
private void mergeSort(int[] data, int[] temp, int l, int r) { I y?_2m
int i, j, k; y[U/5! `zV
int mid = (l + r) / 2; h,|49~^@"
if (l == r) X!+#1NPM
return; vmI2o'zi
if ((mid - l) >= THRESHOLD) h@{U>U7
mergeSort(data, temp, l, mid); s|7(VUPL
else ;>*l?m-S@n
insertSort(data, l, mid - l + 1); OBGA~E;%
if ((r - mid) > THRESHOLD) 3t
mergeSort(data, temp, mid + 1, r); GCN(
else Qt+|s&HGt
insertSort(data, mid + 1, r - mid); ./_o+~\e'
W)3IS&;P
for (i = l; i <= mid; i++) { JCjQR`)
temp = data; ]+1?T)<!
} 6S-1Wc4
for (j = 1; j <= r - mid; j++) { X#l]%IrW!
temp[r - j + 1] = data[j + mid]; T6s~f$G
} 8no_xFA
int a = temp[l]; F_8nxQ-
int b = temp[r]; .#"O VI]#
for (i = l, j = r, k = l; k <= r; k++) { +Eil:Jz
if (a < b) { I]qml2
data[k] = temp[i++]; DNsDEU
a = temp; 4"$K66yk@
} else { >KjyxJ7
data[k] = temp[j--]; % K$om|]p
b = temp[j]; w7b?ve3-
} \Mk;Y
} 't2dP,u<-
} \3P.GS{l
Da#|}m0>
/** (*63G4Nz\
* @param data "Aw| 7XII
* @param l \;0J6LBc
* @param i ?Ji.bnfK
*/ I(6k.PQ
private void insertSort(int[] data, int start, int len) { !FhK<#
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); "j+zd&*={
} K`!q1g`
} !^Mk5E(
} I!(.tu6u6c
} #q{i<E 07
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堆排序： m5HP56a
EjsAV F [@
package org.rut.util.algorithm.support; x`'2oz=,F4
,E]u[7A
import org.rut.util.algorithm.SortUtil; Wsb=SM7;
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/** 1tvgM !.
* @author treeroot c5_?jKpl
* @since 2006-2-2 >G`=8Ku
* @version 1.0 (k?,+jnR
*/ lk $S"OH!
public class HeapSort implements SortUtil.Sort{ A1xY8?#?~c
)A]E:]2
/* (non-Javadoc) 8Z;wF
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *G"vV>OSV
*/ tAD{{GW9
public void sort(int[] data) { M[5zn
MaxHeap h=new MaxHeap(); <y${Pkrj
h.init(data); ien >Ou
for(int i=0;i h.remove(); @:$zReS2
System.arraycopy(h.queue,1,data,0,data.length); |CME:;{T
} lf3:Z5*&>
@;>TmLs
private static class MaxHeap{ uVoM2n?D%^
5MJ`B:He+
void init(int[] data){ w7Nb+/,sg
this.queue=new int[data.length+1]; .Z=D|&!
for(int i=0;i queue[++size]=data; sa\v9
fixUp(size); xwxMVp`|o
} ybBLBJb
} XcJ'w
O@U[S.IK
private int size=0; ?9qA"5
J~z;sTR
private int[] queue; 7)zn[4v7qt
]Xcqf9k
public int get() { \m!swYy
return queue[1]; y}jX/Ln
} Va"_.8n|+
M 7j0&>NTG
public void remove() { x;NCW
SortUtil.swap(queue,1,size--); KK-9[S-
fixDown(1); Dx/!^L02
} zR)|%[sWwQ
file://fixdown =~YmM<L
private void fixDown(int k) { $rf4h]&<
int j; dbGW`_zQ4
while ((j = k << 1) <= size) { }?B=R#5
if (j < size %26amp;%26amp; queue[j] j++; \nV|Y=5
if (queue[k]>queue[j]) file://不用交换 t5h]]TOz
break; ['pk/h
SortUtil.swap(queue,j,k); X<s']C9c
k = j; kvh}{@|-
} ^.Y"<oZSS
} >LxYP7M
private void fixUp(int k) { }S6Sz&)
while (k > 1) { 2Mx9Kd'a r
int j = k >> 1; +r)'?zU
if (queue[j]>queue[k]) W(9fCDO;
break; ToIvyeFr
SortUtil.swap(queue,j,k); a pqzf
k = j; $3](6
} }fw;{&s{z
} GW$(E*4q
ouKID_'
} HxJKS*H;
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} >`DbT:/<
]X+3"
SortUtil： 5J1A|qII
b7>^w<ki
package org.rut.util.algorithm; E)|_7x<u
<^VZ4$j
import org.rut.util.algorithm.support.BubbleSort; P8.tl"q
import org.rut.util.algorithm.support.HeapSort; iZ+\vO?|
import org.rut.util.algorithm.support.ImprovedMergeSort; "|pNS)
import org.rut.util.algorithm.support.ImprovedQuickSort; UM%[UyYQ
import org.rut.util.algorithm.support.InsertSort; cOra`7L`
import org.rut.util.algorithm.support.MergeSort; a#W:SgE?Y
import org.rut.util.algorithm.support.QuickSort; wL,b.]
import org.rut.util.algorithm.support.SelectionSort; }*l V
import org.rut.util.algorithm.support.ShellSort; ~I6Er6$C^
>jAr9Blz]
/** )F 6#n&2
* @author treeroot N m-{$U
* @since 2006-2-2 VY8p[`
* @version 1.0 z^9Yoqog
*/ MJ[#Gq\0R
public class SortUtil { DG1 >T
public final static int INSERT = 1; Xg.'<.!g0
public final static int BUBBLE = 2; /E(H`;DG
public final static int SELECTION = 3; ay#cW.,
public final static int SHELL = 4; RsU=fe,
public final static int QUICK = 5; `pY\Mmgv1
public final static int IMPROVED_QUICK = 6; x Yr-,$/
public final static int MERGE = 7; {e[S?1t=l
public final static int IMPROVED_MERGE = 8; l(9$s4R
public final static int HEAP = 9; cH6ie?KvAo
f&t]O$
public static void sort(int[] data) { ,-A8;DW]^J
sort(data, IMPROVED_QUICK); phSF.WC
} !mK[kXo
private static String[] name={ +NPk9jn
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" dC@aQi6{6
}; 9Qp39(l:
O z%K*
private static Sort[] impl=new Sort[]{ .z+?b8Q\
new InsertSort(), 1&c>v3 $2
new BubbleSort(), 8Q^yh6z
new SelectionSort(), }[Uh4k8P
new ShellSort(), Q^/5hA
new QuickSort(), 8^=g$;g
new ImprovedQuickSort(), `(1em%}
new MergeSort(), !cw<C*
new ImprovedMergeSort(), 0Mt2Rg}
new HeapSort() B{!)GZ(}
}; PRl\W:_t
+O3zeL
public static String toString(int algorithm){ =25qY"Mf
return name[algorithm-1]; ?RvXO'ml
} VE^NSkOa&
_:0<]<x?
public static void sort(int[] data, int algorithm) { }5bh,'
impl[algorithm-1].sort(data); {rGq|Bj
} Vn? %w~0!
?UQVmE&
public static interface Sort { ^4]#Ri=U
public void sort(int[] data); *x[B g]/
} N+l~r]: &
0.O pgv2K
public static void swap(int[] data, int i, int j) { JY0t Hs
int temp = data; P]T(I/\g
data = data[j]; X`]-)(UX
data[j] = temp; G;V@oT
} /dhx+K~
} Pca~V>Hd