[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; K};~A?ET,h
} 1"S~#
int i1=l; P^^WViVX
int i2=mid+1; {wh, "Ok_
for(int cur=l;cur<=r;cur++){ GQ\;f
if(i1==mid+1) gaWJzK Yc_
data[cur]=temp[i2++]; 7-VP)|L#G
else if(i2>r) *X\J[$!
data[cur]=temp[i1++]; :6jh*,OHZl
else if(temp[i1] data[cur]=temp[i1++]; 1!W'0LPM
else /N7.|XI.
data[cur]=temp[i2++]; ]XjL""EbC
} +lw8YH
} 2?nEHIUT
cnz+%Y N
} '1"vwXJ"
v(P5)R,
改进后的归并排序: g+]o=@
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package org.rut.util.algorithm.support; Oh5aJ)"D
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import org.rut.util.algorithm.SortUtil; y`\rb<AZ*t
gTb%c84
/** x4XCR,-
* @author treeroot dLbSvK<(I
* @since 2006-2-2 yYiu69v
* @version 1.0 V*gh"gZ<
*/ PVaqKCj:6W
public class ImprovedMergeSort implements SortUtil.Sort { 5S 4Bz
VQ8Q=!]
private static final int THRESHOLD = 10; 4u=v
2= zw!
/* R1~wzy
* (non-Javadoc) ,}/6Za
* Gz:ell$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Slv91c&md,
*/ c2wgJH!g
public void sort(int[] data) { TjS&V
int[] temp=new int[data.length]; G=PX'dS
mergeSort(data,temp,0,data.length-1); rGlnu.mK^
} n;LjKE
GL,( N|
private void mergeSort(int[] data, int[] temp, int l, int r) { l#TE$d^ym
int i, j, k; ^{a_:r"
int mid = (l + r) / 2; Hm'aD2k
if (l == r) +!mEP>
return; -5Oy k,
if ((mid - l) >= THRESHOLD) |4rqj1*U
mergeSort(data, temp, l, mid); ,</Kn~b
else &l0,q=T
insertSort(data, l, mid - l + 1); et=i@PB)
if ((r - mid) > THRESHOLD) l4ru0V8s7
mergeSort(data, temp, mid + 1, r); 3fxcH
else IZBY*kr
insertSort(data, mid + 1, r - mid); Y+{jG(rg.F
5c$\DZ(
for (i = l; i <= mid; i++) { `_SV1|=="8
temp = data; Z8`Y}#Za[
} uM,R+)3
for (j = 1; j <= r - mid; j++) { -z">ov-)
temp[r - j + 1] = data[j + mid]; W<:x4gBa
} <"yL(s^u"
int a = temp[l]; .'b|pd
int b = temp[r]; JnLF61
for (i = l, j = r, k = l; k <= r; k++) { EMzJyGt7
if (a < b) { ajW2HH*9}A
data[k] = temp[i++]; ?5;N=\GQ
a = temp; RZ|M;c
} else { C!U$<_I\2
data[k] = temp[j--]; >D%
b = temp[j]; !~tf0aY
} Q5HSik4
} }/QtIY#I
} Vwb_$Yi+]
FuC\qF
/** xdh%mG:?
* @param data \027>~u {
* @param l Py#TXzEcC
* @param i 9Dp0Pi?29
*/ ?JBA`,-
private void insertSort(int[] data, int start, int len) { M(vX.kF
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); W;?e@}
} PMT}fg
} intl?&wC
} $b)t`r+
} iK!FVKi}
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堆排序： D!z'Y,.
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package org.rut.util.algorithm.support; -$$mrU
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import org.rut.util.algorithm.SortUtil; LtUvFe
W#2} EX
/** x[xRqC vL
* @author treeroot aYM~Ub:x{
* @since 2006-2-2 )iid9K<HB
* @version 1.0 /D964VR1M\
*/ 3taGb>15
public class HeapSort implements SortUtil.Sort{ ^6J*:(eM
*4%%^*g.I
/* (non-Javadoc) A0OA7m:~4
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Eihy|p
*/ GK;IY=8W
public void sort(int[] data) { }R/we`
MaxHeap h=new MaxHeap(); p`EgMzVO,
h.init(data); xQl}~G]!
for(int i=0;i h.remove(); &G?"I%Vw
System.arraycopy(h.queue,1,data,0,data.length); 8tVSai8[
} x~=Mn%Ew0
Ze <)B *
private static class MaxHeap{ 8Ltl32JSB[
Yr>0Qg],
void init(int[] data){ b1;h6AeL
this.queue=new int[data.length+1]; hM[3l1o{|
for(int i=0;i queue[++size]=data; *qu5o5Q
fixUp(size); eL.WP`Lz
} 4o"?QV:
} E#,\[<pc
U8-OQ:2.
private int size=0; HD& Cp
w@Asz9Lq%
private int[] queue; Z}{]/=h
5 D=r7
public int get() { -9;?k{{[T
return queue[1]; !2>@:CKX
} B&_Z&H=
[$td:N *
public void remove() { jo3(\Bq
SortUtil.swap(queue,1,size--); u-tD_UIck
fixDown(1); ^qi+Y)dU|
} 9hssIZO
file://fixdown sPVE_n
private void fixDown(int k) { ,SNt*t1"
int j; 3hxV`rb
while ((j = k << 1) <= size) { , &n"#
if (j < size %26amp;%26amp; queue[j] j++; XE&h&v=>
if (queue[k]>queue[j]) file://不用交换 9Ofls9]U
break; aqWlX0+
SortUtil.swap(queue,j,k); Djdd|Z+*{
k = j; g*`xEb='
} Q*M(d\Vs
} f:y1eLl3
private void fixUp(int k) { M2c7|
while (k > 1) { zR<fz
int j = k >> 1; 9gglyoZ%
if (queue[j]>queue[k]) O;i0xWUh
break; <EcxNj1
SortUtil.swap(queue,j,k); D_1O4/
k = j; Ji:<eRx)
} .<Jv=
} [^7P ]olW
42p1P6d
} KV8<'g+2?
qj `C6_?
} |)C*i
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SortUtil： 8Lgm50bs
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package org.rut.util.algorithm; OZd (~E
yimK"4!j5A
import org.rut.util.algorithm.support.BubbleSort; e /1x/v'
import org.rut.util.algorithm.support.HeapSort; =FI[/"476
import org.rut.util.algorithm.support.ImprovedMergeSort; bC~I}^i\
import org.rut.util.algorithm.support.ImprovedQuickSort; 5pC}ZgEa<
import org.rut.util.algorithm.support.InsertSort; t`{T:Tjc
import org.rut.util.algorithm.support.MergeSort; $4~Z]-38#A
import org.rut.util.algorithm.support.QuickSort; ekU%^R<
import org.rut.util.algorithm.support.SelectionSort; (9kR'kr
import org.rut.util.algorithm.support.ShellSort; WUo\jm[yr
`34{/}w
/** Ok|Dh;1_
* @author treeroot VIN0kRQ#
* @since 2006-2-2 bar=^V)
* @version 1.0 8ZqLGa]
*/ 3Zl:rYD?
public class SortUtil { I8`$a
public final static int INSERT = 1; n\V7^N
public final static int BUBBLE = 2; /nuz_y\J
public final static int SELECTION = 3; ,hT.Ok={36
public final static int SHELL = 4; k`A39ln7wu
public final static int QUICK = 5; -%gEND-AP
public final static int IMPROVED_QUICK = 6; f8aY6o"i
public final static int MERGE = 7; f$n5$hJlQ
public final static int IMPROVED_MERGE = 8; Pqw<nyC.
public final static int HEAP = 9; ^6R(K'E}
U*E)y7MY
public static void sort(int[] data) { Jj\lF*B
sort(data, IMPROVED_QUICK); awvP;F?q|
} @6UZC-M0
private static String[] name={ >T c\~l
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" c#"t.j<E}
}; zH6@v+gb
2%6 >)|
private static Sort[] impl=new Sort[]{ {7c'%e
new InsertSort(), F?05+
new BubbleSort(), #p55/54ZI
new SelectionSort(), iU37LODa2T
new ShellSort(), yjMN>L'
new QuickSort(), deVnAu =
new ImprovedQuickSort(), y+w,j]
new MergeSort(), {j;` wN
new ImprovedMergeSort(), |2@*?o"ll
new HeapSort() ; :q
}; tq3Rc}
%>_6&A{K,d
public static String toString(int algorithm){ %=Z/Frd
return name[algorithm-1]; j*Pq<[~
} _MLf58
"om7 :d
public static void sort(int[] data, int algorithm) { 3)6-S
impl[algorithm-1].sort(data); S*|/txE'~Y
} \!BVf@>p%
.UNV &R0
public static interface Sort { !U>WAD9
public void sort(int[] data); i}P{{kMJ
} ;RX u}pd
v=0G&x=/
public static void swap(int[] data, int i, int j) { ..+#~3es#y
int temp = data; ' h<(
data = data[j]; fByf~iv,
data[j] = temp; EY<"B2_%
} m8b,_1
} s</qT6@