[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; Q7GY3X*kA
} N4wA#\-
int i1=l; m|F:b}0Hb
int i2=mid+1; ,2,5Odrz
for(int cur=l;cur<=r;cur++){ x=*L-
if(i1==mid+1) S GM!#K
data[cur]=temp[i2++]; BJ5}GX!
else if(i2>r) BQ#L+9%
data[cur]=temp[i1++]; m@\ZHbq
else if(temp[i1] data[cur]=temp[i1++]; re`t ]gzb
else 0^&!6R
data[cur]=temp[i2++]; 2|{V,!/cvG
} l r~gG3
} hs(W;tR@W
;LMWNy4
} Wi$dZOcSJ
FjFwvO_.
改进后的归并排序: Fo}7hab
_Y!sVJ){,c
package org.rut.util.algorithm.support; |[1D$Qv
PJ q yvbD
import org.rut.util.algorithm.SortUtil; W)4QOS&
^E,1V5
/** j@| `f((4
* @author treeroot dR+1aY;
* @since 2006-2-2 WG5W0T_
* @version 1.0 fdv`7u+}a
*/ BsLG^f
public class ImprovedMergeSort implements SortUtil.Sort { W^3;F1
1@_T m
private static final int THRESHOLD = 10; #/ "+
; Lql_1
/* /3B6Mtb
* (non-Javadoc) 1%`7.;!i
* BX< dSK
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) AGq>=avv
*/ JhX=l-?
public void sort(int[] data) { ^Z}Ob= .G
int[] temp=new int[data.length]; fn}UBzED\
mergeSort(data,temp,0,data.length-1); DtF}QvA
} Jpj!rXTX*
y%cO#P@
private void mergeSort(int[] data, int[] temp, int l, int r) { ZjVWxQ
int i, j, k; L1#Ij#
int mid = (l + r) / 2; bx}fj#J]En
if (l == r) p#@Z$gTH`'
return; O#_b7i
if ((mid - l) >= THRESHOLD) <Kt3PyF
mergeSort(data, temp, l, mid); >M;u*Go`QO
else g^~Kze
insertSort(data, l, mid - l + 1); ~cqryr9
if ((r - mid) > THRESHOLD) @i%YNI5*
mergeSort(data, temp, mid + 1, r); \Fb| {6+
else Qe$k3!
insertSort(data, mid + 1, r - mid); %b}gDWs
_*6v|Ed?
for (i = l; i <= mid; i++) { k\7:{y@,
temp = data; XDz5b.,
} ry0%a[[
for (j = 1; j <= r - mid; j++) { 9uYyfb: ,z
temp[r - j + 1] = data[j + mid]; HeA{3s
} OB^Tq~i
int a = temp[l]; PQ U]l"A
int b = temp[r]; ,)fkr]`<
for (i = l, j = r, k = l; k <= r; k++) { \2kPq>hu
if (a < b) { ^g>1U5c
data[k] = temp[i++]; ~?Omy8#
a = temp; <J{'o`{
} else { I+;-p]~
data[k] = temp[j--]; .EP6oKA
b = temp[j]; `-UJ /{
} 'Kbl3fUF
} QIU,!w-3X
} Is.WZYa
BNucc']
/** !<n"6KA.
* @param data |m G7XL,
* @param l 0ejdKdYN
* @param i 0$P/jt
*/ buMqF-j
private void insertSort(int[] data, int start, int len) { Q^_/By@
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); C"w {\ &R
} Ru\_dr2yI}
} kQv*eZ~
} !Pj/7JC0
} }1H=wg>\
xUWr}j4;
堆排序： &KC!*}<tx
XcfKx@l
package org.rut.util.algorithm.support; z2yJ#
M>H=z#C>/A
import org.rut.util.algorithm.SortUtil; my.`k'
W WG /k17
/** pW?&J>\6
* @author treeroot .[s2zI
* @since 2006-2-2 qE7R4>5xjO
* @version 1.0 u{f* M,k
*/ ^U q
public class HeapSort implements SortUtil.Sort{ oFC)
Q<"[C 1Lj
/* (non-Javadoc) CAc %f9!3
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) eE]hy'{d<
*/ UlovXb
public void sort(int[] data) { G*}F5.>8(
MaxHeap h=new MaxHeap(); saZ>?Owz
h.init(data); Ff4*IOZ}(
for(int i=0;i h.remove(); C!x/ ^gw
System.arraycopy(h.queue,1,data,0,data.length); E^Gg '1
} ?.bnIwQe
<,1fkq>,
private static class MaxHeap{ /Z%>ArAx
!u;>Wyd W
void init(int[] data){ i+vsp@d
this.queue=new int[data.length+1]; u<tk G B
for(int i=0;i queue[++size]=data; ; y.E!
fixUp(size); \gO,hST
} TH1B#Y#<J
} #=,(JmQPt
#`SD$;
private int size=0; KLQ!b,=q
9IZu$-
private int[] queue; QLq@u[A
8Jr?ZDf`
public int get() { 8<#U9]
return queue[1]; )NW6?Pu"
} 4sFv?W
":W%,`@$
public void remove() { GH4iuPh]
SortUtil.swap(queue,1,size--); !.X.tc
fixDown(1); )@g;j>
} ~6[*q~B
file://fixdown DPDe>3Mi[
private void fixDown(int k) { lPP,`
int j; .0y%5wz8j
while ((j = k << 1) <= size) { ~Pf5ORoe
if (j < size %26amp;%26amp; queue[j] j++; r.3KPiYK
if (queue[k]>queue[j]) file://不用交换 /.Jb0h[W1
break; *,WP,-0
SortUtil.swap(queue,j,k); gUax'^w;V;
k = j; U8QX46Br
} CnF |LTi
} iU2KEqCm
private void fixUp(int k) { LLAa1Wq
while (k > 1) { ~=n#}{/
int j = k >> 1; pK&I^r
if (queue[j]>queue[k]) D&:yMp(
break; o4^Fo p
SortUtil.swap(queue,j,k); @e2}BhB2
k = j; v90T{1+M|4
} j2n,f7hl.
} O}ejWP8>
)M<vAUF
} 'ktHPn ,K
C;B}3g&
} u=l1s1>
JiS5um=(.
SortUtil： x;E2~&E
Cpl;vQ
package org.rut.util.algorithm; ]`=X'fED
>v5k{Cbp0
import org.rut.util.algorithm.support.BubbleSort; 83ipf"]*
import org.rut.util.algorithm.support.HeapSort; !fkep=
import org.rut.util.algorithm.support.ImprovedMergeSort; 3/6/G}s
import org.rut.util.algorithm.support.ImprovedQuickSort; t!;/Z6\Pb
import org.rut.util.algorithm.support.InsertSort; RMYP"
import org.rut.util.algorithm.support.MergeSort; -e@!
import org.rut.util.algorithm.support.QuickSort; $ChK]v 6C
import org.rut.util.algorithm.support.SelectionSort; }-<zWI{p
import org.rut.util.algorithm.support.ShellSort; qCMl!g'
]dPZ.r
/** p='-\M74K
* @author treeroot deX5yrvOie
* @since 2006-2-2 )h$NS2B`
* @version 1.0 Vd9@Dy
*/ <eN R8(P
public class SortUtil { 2ef;NC.&n
public final static int INSERT = 1; [bQj,PZ&
public final static int BUBBLE = 2; b3qc_
public final static int SELECTION = 3; rnm03 '{
public final static int SHELL = 4; LJzH"K[Gg6
public final static int QUICK = 5; ZXb0Y2AVx
public final static int IMPROVED_QUICK = 6; wdE?SDs
public final static int MERGE = 7; %'Xk)-+y
public final static int IMPROVED_MERGE = 8; &~DTZgY
public final static int HEAP = 9; Z'v-F^
T6#"8qz<
public static void sort(int[] data) { 'W. Vr4
sort(data, IMPROVED_QUICK); v6a]1B
} Jc*XXu)
private static String[] name={ kMxazx1
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" tJI,r_
}; w5C*L)l
BNGe exs@
private static Sort[] impl=new Sort[]{ WgR4Ix^L#
new InsertSort(), *<V^2z$y_
new BubbleSort(), @Cq? :o<
new SelectionSort(), L):U"M>]=
new ShellSort(), =v6*|
new QuickSort(), 5"Kx9n|
new ImprovedQuickSort(), ;DRTQn`m
new MergeSort(), ?[)S7\rP
new ImprovedMergeSort(), |I8Mk.Z=FA
new HeapSort() @]CF&: P A
}; jk~:\8M(A
!mfJpJ
public static String toString(int algorithm){ =H]F`[B=
return name[algorithm-1]; "kW!{n
} TJ@Cjy%
9L eNe}9v
public static void sort(int[] data, int algorithm) { $\Lyi#<
impl[algorithm-1].sort(data); LX+5|u
} ;-mdi/*g
1'w:`/_
public static interface Sort { yWIm&Q:
public void sort(int[] data); Xo5$X7m
} h\[\\m O
*tQk;'/A]
public static void swap(int[] data, int i, int j) { !%L,*'
int temp = data; &Y>zT9]$K
data = data[j]; 9|r* pK[
data[j] = temp; ilLBCS}
} _uxPx21g}
} mPZGA\