[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; &8AS=v
} >v_5xd9
int i1=l; thPH_DW>eb
int i2=mid+1; !;*2*WuO;
for(int cur=l;cur<=r;cur++){ ,*Z[P%<9
if(i1==mid+1) WJU NJN
data[cur]=temp[i2++]; OPY/XKyY,
else if(i2>r) 'HWgvmw(
data[cur]=temp[i1++]; bus=LAJt=
else if(temp[i1] data[cur]=temp[i1++]; FFeRE{,
else .(1j!B4^
data[cur]=temp[i2++]; 9T,QWk
} '}`hY1v
} a61eH )a
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} ?SOF n
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改进后的归并排序: P>T*:!s;
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package org.rut.util.algorithm.support; To8v#.i
}Q=se[((
import org.rut.util.algorithm.SortUtil; Zc3:9
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/** Z^`=!n-V
* @author treeroot &/hr-5k
* @since 2006-2-2 T{H#]BF<E
* @version 1.0 :iQ^1S`pH
*/ TnBGMI,g'
public class ImprovedMergeSort implements SortUtil.Sort { vx5o k1UY
tbzvO<~
private static final int THRESHOLD = 10; q\b ?o!#_
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/* eN<pU%7
* (non-Javadoc) \m~\,em
* v6P~XK}G
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) R`C_CsXir
*/ W8yfa[z~J
public void sort(int[] data) { ;Q>3N(
int[] temp=new int[data.length]; W3V{Xk|
mergeSort(data,temp,0,data.length-1); LYy:IBI7_
} T3t~=b>&L
LB*#
private void mergeSort(int[] data, int[] temp, int l, int r) { ~\:j9cC
int i, j, k; V0'p1J tD
int mid = (l + r) / 2; .FbZVYc]
if (l == r) 8X ?GY8W:
return; KYRm Ui#
if ((mid - l) >= THRESHOLD) !:5`im;i
mergeSort(data, temp, l, mid); K?Xo3W%K
else 1[/$ZYk:
insertSort(data, l, mid - l + 1); d[RWkk5
if ((r - mid) > THRESHOLD) vzyI::f?
mergeSort(data, temp, mid + 1, r); !Ir1qt8T
else enbN0
insertSort(data, mid + 1, r - mid); (LT\ IJSM
;vv!qBl|@
for (i = l; i <= mid; i++) { \,%o>M'
temp = data; QVG0>,+}$
} ;c m wh<
for (j = 1; j <= r - mid; j++) { "'}v0*[
temp[r - j + 1] = data[j + mid]; f0mH|tI`
} +ptF-
int a = temp[l]; ;+ Co!L
int b = temp[r]; ^0-e,d 9h
for (i = l, j = r, k = l; k <= r; k++) { sPE)m_u
if (a < b) { emkMR{MY
data[k] = temp[i++]; bDZKQ&
a = temp; D=82$$
} else { RdvPsv}D
data[k] = temp[j--]; \+?,c\x
b = temp[j]; S1az3VJI\
} 8MeO U
} .i3lG( YG
} 17n+4J]
wKi}@|0[@
/** Xv-1PY':pA
* @param data UE&C
* @param l v`_i1h9p{
* @param i .e FOfV)
*/ JhhUg
private void insertSort(int[] data, int start, int len) { Oa.f~|
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ]w_
} i!.I;@
} Wlr&g xZ
} h=K36a)
} X@bn??
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堆排序： <wUD
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package org.rut.util.algorithm.support; qlz9&w
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import org.rut.util.algorithm.SortUtil; Msv*}^>
/jZaU`
/** yUD_w
* @author treeroot Y0Hq+7x
* @since 2006-2-2 C>Omng1>^
* @version 1.0 2xL!PR-
*/ :_o] F
public class HeapSort implements SortUtil.Sort{ _uO!N(k.
B8cBQv
/* (non-Javadoc) )]c]el@y
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) >/!7i3Ow-
*/ f%Z;05
public void sort(int[] data) { L@1,7@
MaxHeap h=new MaxHeap(); J$6-c'8
h.init(data); JVUZ}#O
for(int i=0;i h.remove(); >bX-!<S
System.arraycopy(h.queue,1,data,0,data.length); b(.-~c('
} Xr@l+zr
ih+*T1#:(
private static class MaxHeap{ IFd )OZ5
Xq8uY/j
void init(int[] data){ ,YP1$gj
this.queue=new int[data.length+1]; "<PoJPh
for(int i=0;i queue[++size]=data; [):{5hMA
fixUp(size); 97qtJ(ESI
} 5"-una>D
} } * ?n?'
&\J?[>EJ.
private int size=0; V-D}U$fw
Sk6b`W7$
private int[] queue; {h/OnBwG
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public int get() { 0On?{Bw
return queue[1]; qYgwyj=4
} /~o7Q$)-b
`y8 ?=
public void remove() { ~")hE%Kl}
SortUtil.swap(queue,1,size--); XKz;o^1a^
fixDown(1); lv<iJH\
} .-SDo"K.h
file://fixdown 0t#NMW
private void fixDown(int k) { ^%\)Xi
int j; F[>7z3I
while ((j = k << 1) <= size) { 'O.+6`&
if (j < size %26amp;%26amp; queue[j] j++; Zdv.PGn
if (queue[k]>queue[j]) file://不用交换 u-AWJc+F.
break; V,>+G6e
SortUtil.swap(queue,j,k); *'UhlFed
k = j; 0K=Qf69Y
} 5kGxhD
} W4)kkJ
private void fixUp(int k) { 0Y2\n-`z
while (k > 1) { g\ErJ+i
int j = k >> 1; ^=eq .(>
if (queue[j]>queue[k]) LYd}w(}
break; xN#bzma
SortUtil.swap(queue,j,k); vOos*&
k = j; RL?u n}Qa
} G{@C"H[$<
} :7 qqjs
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} A)\>#Dv
;;ER"N
} ybo#K
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SortUtil： YS]>_
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package org.rut.util.algorithm; RY9+ 9i
v#RW{kI
import org.rut.util.algorithm.support.BubbleSort; 285_|!.Y
import org.rut.util.algorithm.support.HeapSort; w- UKMW9"
import org.rut.util.algorithm.support.ImprovedMergeSort; mgy"|\]
import org.rut.util.algorithm.support.ImprovedQuickSort; {F'Az1^I=
import org.rut.util.algorithm.support.InsertSort; 1a<]$tZk
import org.rut.util.algorithm.support.MergeSort; J__;.rnk
import org.rut.util.algorithm.support.QuickSort; lkV6qIj
import org.rut.util.algorithm.support.SelectionSort; ,VPbUo@
import org.rut.util.algorithm.support.ShellSort; S3SV.C:z>
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/** |J:$MX~
* @author treeroot RS'} nY}
* @since 2006-2-2 cvKV95bn
* @version 1.0 1s Br.+p
*/ -u6}T!
public class SortUtil { }KK2WJp#M
public final static int INSERT = 1; }0$mn)*k
public final static int BUBBLE = 2; 3>i>@n_
public final static int SELECTION = 3; ;4!=DFbU
public final static int SHELL = 4; I^WIa"u_
public final static int QUICK = 5; fs&,w
public final static int IMPROVED_QUICK = 6; JxjP@nr
public final static int MERGE = 7; #:$O=@@?M
public final static int IMPROVED_MERGE = 8; V/J>GRjw
public final static int HEAP = 9; O~.U:45t
?$3r5sx
public static void sort(int[] data) { =K&#.r
sort(data, IMPROVED_QUICK); N6h1|_o
} 6MuWlCKF8
private static String[] name={ +W6Hva.
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ,*7H|de7
}; Am=wEu[b
HzE1r+3Q@
private static Sort[] impl=new Sort[]{ j8pFgnQ
new InsertSort(), SC'BmR"ox
new BubbleSort(), [#0Yt/G
new SelectionSort(), C*7!dW6
new ShellSort(), .AXdo'&2i
new QuickSort(), 7U,k 2LS
new ImprovedQuickSort(), \yM-O-{
new MergeSort(), )7W6-.d
new ImprovedMergeSort(), ;;@IfZ ?j
new HeapSort() l<TIG3bs
}; ?L=A2C\_-
)!cI|tovs
public static String toString(int algorithm){ W}>=JoN^J
return name[algorithm-1]; i`+B4I8[
} ,*dzJT$k
F+Z2U/'a
public static void sort(int[] data, int algorithm) { 9UP:J0 `
impl[algorithm-1].sort(data); _vL<h$vD
} 7$ d}!S
cS}r9gaQ
public static interface Sort { P<u"97@8a
public void sort(int[] data); 6^sHgYR
} e&2wdH&
@&5A&(
public static void swap(int[] data, int i, int j) { 4b4QbJ$
int temp = data; aM$\#Cx
data = data[j]; eaQ90B4
data[j] = temp; f/ajejYo?,
} 6yI}1g
} k,rWa