[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; u-&V, *3l
} Kkovp^G
int i1=l; aHu0z:
int i2=mid+1; %XN;S29d5W
for(int cur=l;cur<=r;cur++){ -h7ssf'u[
if(i1==mid+1) ]QR]#[Tn'
data[cur]=temp[i2++]; QAx9W%
else if(i2>r) xP~GpVhLF
data[cur]=temp[i1++]; ds+K7B$
else if(temp[i1] data[cur]=temp[i1++]; \( V1-,
else a]fFR~OY
data[cur]=temp[i2++]; ZKrK>X
} \?t8[N\_[(
} @` Pn<_L
`lE&:)
} I~F&@
mD7NQ2:wA
改进后的归并排序: `AE6s.p?
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package org.rut.util.algorithm.support; >;Oa|G
C)FO:lLr\
import org.rut.util.algorithm.SortUtil; @C@9Tw2Y
QyL]-zNg
/** oy jkk
* @author treeroot j?*n@'
* @since 2006-2-2 $!. [R}
* @version 1.0 r4[=pfe25
*/ Tv7W)?3h
public class ImprovedMergeSort implements SortUtil.Sort { K_Y{50#
2~hdJ/
private static final int THRESHOLD = 10; wN'S+4
n:40T1:q
/* ,=CipL9]
* (non-Javadoc) \?v&JmEU
* qspGNu
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) p/_W*0/i
*/ A@|Z^T:
public void sort(int[] data) { ^_v94!a9
int[] temp=new int[data.length]; P=EZ6<c3&
mergeSort(data,temp,0,data.length-1); zUJXA:L9
} <-N eusx%
}2S!;swg+
private void mergeSort(int[] data, int[] temp, int l, int r) { 6!0NFP~b
int i, j, k; <<S4l~"o
int mid = (l + r) / 2; cd,'37pZ
if (l == r) cHr]{@7Cs
return; YIW9z{rrs
if ((mid - l) >= THRESHOLD) XsJ`x
mergeSort(data, temp, l, mid); 'X+aYF}Ye
else H#GR*4x
insertSort(data, l, mid - l + 1); pW8?EGO@
if ((r - mid) > THRESHOLD) -SD:G]un
mergeSort(data, temp, mid + 1, r); jA?[*HB
else }Y.@:v j
insertSort(data, mid + 1, r - mid); 5YPIv-
n1|]ji[c
for (i = l; i <= mid; i++) { @A8y!<
temp = data; W:n\,P
} ;Co"bP's
for (j = 1; j <= r - mid; j++) { )?&mCI*
temp[r - j + 1] = data[j + mid]; Eyf17
} h{-en50tN
int a = temp[l]; XdIno}pN
int b = temp[r]; \I i#R
for (i = l, j = r, k = l; k <= r; k++) { $#e}9g.
if (a < b) { (421$w,B%
data[k] = temp[i++]; ?~.9:93
a = temp; E l.eK9L
} else { dk]
data[k] = temp[j--]; (:~_#BA
b = temp[j]; N%:uOX8{
} 7.NL>:lu
} JYjc^m
} 1*9Yy~w
`4@`G:6BL
/** :,H_ e! X
* @param data .Sw4{m[g
* @param l </<z7V,{
* @param i n@@tO#!\
*/ NY?iuWa*g
private void insertSort(int[] data, int start, int len) { /Tl ybSC1
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); )N{PWSPs
} 8z=o.\@
} "e\73?P
} O+XQP!T
} oKSW:A
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堆排序： AS0(NlV
Qh3+4nLFtb
package org.rut.util.algorithm.support; )I<VH+6
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import org.rut.util.algorithm.SortUtil; ~:!&}e5
tMf5TiWu@
/** K'e!BZm6Q
* @author treeroot "[A&S!
* @since 2006-2-2 [uie]*^
* @version 1.0 j }^?Snq
*/ _mdJIa0D6k
public class HeapSort implements SortUtil.Sort{ jkuNafp}
)tV]h#4
/* (non-Javadoc) $a\X(okx
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) tvzO)&)$
*/ _jkJw2+s\
public void sort(int[] data) { v/KTEM
MaxHeap h=new MaxHeap(); Dh{P23}
h.init(data); 5.0;xz}#y
for(int i=0;i h.remove(); g+.E=Ef8<4
System.arraycopy(h.queue,1,data,0,data.length); aM[fag$c
} &U.y):
H-5f!>)
private static class MaxHeap{ Rx%kAt2X
&#q%#M:
void init(int[] data){ F+xMXBD@>*
this.queue=new int[data.length+1]; bg4VHT7?>)
for(int i=0;i queue[++size]=data; jAt65a
fixUp(size); `b@"GOr
} I GcR5/3
} S9/\L6Rmf
DML0paOm5
private int size=0; P#A|Pn<p
9D%~~~ %b
private int[] queue; Q"xDRQA
jTQN(a9Y
public int get() { *OE>gg&?Nh
return queue[1]; ~ C_2D?
} g=v[@{9Pw
f'Xz4;
public void remove() { Yu^}
SortUtil.swap(queue,1,size--); 1^;&?E
fixDown(1); m} =<@b:l
} +fIyeX
file://fixdown S 1Ji\
private void fixDown(int k) { L?y,xA_
int j; [7)#3
while ((j = k << 1) <= size) { zgpPu4t
if (j < size %26amp;%26amp; queue[j] j++; VKrKA71Z~
if (queue[k]>queue[j]) file://不用交换 Z3T26Uk
break; / dn]`Ge)
SortUtil.swap(queue,j,k); R91u6r#
k = j; D3 E!jQ1
} 2gjA>ET`N
} s{j3F
private void fixUp(int k) { zwHTtE
while (k > 1) { `Sj8<O}
int j = k >> 1; naB[0I& N
if (queue[j]>queue[k]) =WP}RZ{S
break; WHF:>0B
SortUtil.swap(queue,j,k); 2,%ne(
k = j; ]gj@r[
} .^1=*j(;
} 6Ue6b$xE
]7"mt2Q=3
} X]CaWxM
d}415 XA
} *JOv
}`^<ZNkb/
SortUtil： `}Hnj*
1$2Rs-J
package org.rut.util.algorithm; mKq9mA"(E
`Op ";E88
import org.rut.util.algorithm.support.BubbleSort; %s)E}cGH
import org.rut.util.algorithm.support.HeapSort; ~GY;{
import org.rut.util.algorithm.support.ImprovedMergeSort; IWpUbD|kC
import org.rut.util.algorithm.support.ImprovedQuickSort; Q{Bj(f
import org.rut.util.algorithm.support.InsertSort; 7y`~T+
import org.rut.util.algorithm.support.MergeSort; 2W~2Hk=0+%
import org.rut.util.algorithm.support.QuickSort; TT&!WbA-Hk
import org.rut.util.algorithm.support.SelectionSort; o_$r*Z|HG
import org.rut.util.algorithm.support.ShellSort; Ap>n4~
!!K=v7M
/** ,|c_l)
* @author treeroot ~d5{Q?T)
* @since 2006-2-2 sQH.}W$C
* @version 1.0 )d1,}o
*/ >"nk}@
public class SortUtil { j+ys&pDczm
public final static int INSERT = 1; Pr/&p0@aV
public final static int BUBBLE = 2; CC87<>V
public final static int SELECTION = 3; C,z]q$4
public final static int SHELL = 4; 1Q;`<=
public final static int QUICK = 5; )DLK<10
public final static int IMPROVED_QUICK = 6; y! 1NS
public final static int MERGE = 7; rC*nZ*
public final static int IMPROVED_MERGE = 8; (c*Dvpo1
public final static int HEAP = 9; SI(8.$1
)*JTxMQ
public static void sort(int[] data) { ;~q)^.K3
sort(data, IMPROVED_QUICK); O@Kr}8^,
} Ua3ERBX{
private static String[] name={ BR%:`uiQ<
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" (c_hX(
}; p]g/iLDZ
2I4P":q
private static Sort[] impl=new Sort[]{ 1-[{4{R
new InsertSort(), (jyJ-qe
new BubbleSort(), xX>448=
new SelectionSort(), U)o8Tr
new ShellSort(), 4'8.f5
new QuickSort(), / q!&I
new ImprovedQuickSort(), aH#|LrdJ
new MergeSort(), nBj7Q!lW
new ImprovedMergeSort(), Fu><lN7
new HeapSort() 4%{m7CK}
}; liB>~DVC
_0`O}
public static String toString(int algorithm){ .lnD]Q
return name[algorithm-1]; t2$:*PvE
} 3G&1. 8
Ywr{/
public static void sort(int[] data, int algorithm) { C|JWom\J
impl[algorithm-1].sort(data); >) ^!gz8
} Q'Tn+}B&
/][U$Q;Ke
public static interface Sort { ljCgIfZ_4
public void sort(int[] data); w/<hyEpxg
} n#fg7d%
0?sp
public static void swap(int[] data, int i, int j) { ouI0"R&@
int temp = data; +$'/!vN
data = data[j]; _B[(/wY
data[j] = temp; s_8!x
} 3IxT2@H)
} 1WKDG~