[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; ^r~O*
} =P%?{7
int i1=l; ;pj,U!{%s\
int i2=mid+1; GTM@9^
for(int cur=l;cur<=r;cur++){ 0`V;;w8
if(i1==mid+1) xzHb+1+p
data[cur]=temp[i2++]; )FN\jo!!.
else if(i2>r) z HT#bP:o
data[cur]=temp[i1++]; 2<9&OL
else if(temp[i1] data[cur]=temp[i1++]; Z!-V&H.
else lK_T%1Gz
data[cur]=temp[i2++]; y* :C~
} U@9v(TfV
} 3rBID
<JIqkGeAi
} $R%tD.d3
D-FT3Culw
改进后的归并排序: {53|X=D64
`S+n,,l
package org.rut.util.algorithm.support; iJH?Z,Tjf
(mplo|>
import org.rut.util.algorithm.SortUtil; ~O~iP8T
:{ iK 5
/** zZ,"HY=jN
* @author treeroot _Q'f^Kj
* @since 2006-2-2 0avtfQ +f
* @version 1.0 zs6rd83#
*/ PeIKx$$Kl{
public class ImprovedMergeSort implements SortUtil.Sort { IrUoAQ2xpG
ZUD{V
private static final int THRESHOLD = 10; fA"c9(>m%]
7K ~)7U
/* Hy5 6@jW+E
* (non-Javadoc) 6LrI,d
* *R}p9;dpO
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 31\mF\{V
*/ Z;S)GUG^
public void sort(int[] data) { G5%k.IRz
int[] temp=new int[data.length]; _0BQnzC=
mergeSort(data,temp,0,data.length-1); jn`5{ ]D
} #"8'y
z%BX^b$Hj
private void mergeSort(int[] data, int[] temp, int l, int r) { EeHghq
int i, j, k; Cn0s?3Fm
int mid = (l + r) / 2; HQwrb HS
if (l == r) `n@;%*6/
return; hXvC>ie(i
if ((mid - l) >= THRESHOLD) ;66{S'*[
mergeSort(data, temp, l, mid); m#ig.z|A
else [)?9|yY"`
insertSort(data, l, mid - l + 1); e,Z[Nox
if ((r - mid) > THRESHOLD) zJ$U5r/u
mergeSort(data, temp, mid + 1, r); <,Pl31g^
else l[i1,4
insertSort(data, mid + 1, r - mid); [+8*}03
_DAqL@5n
for (i = l; i <= mid; i++) { &*bpEdkZ
temp = data; v_WF.sb~
} 8H1&=)M=
for (j = 1; j <= r - mid; j++) { ~!M"
temp[r - j + 1] = data[j + mid]; );h
} XD" 4t4~>
int a = temp[l]; "&{.g1i9
int b = temp[r]; 6J_$dzw
for (i = l, j = r, k = l; k <= r; k++) { ZuZCIqN
if (a < b) { D^a(|L3;
data[k] = temp[i++]; p"7[heExw
a = temp; HYG1BfEaW
} else { bc:3 5.
data[k] = temp[j--]; /EJy?TON*
b = temp[j]; ]q"y P0
} wz{c;v\J^
} *CbV/j"P?
} r i)`e
Ms5R7<O.7
/** _2)QL
* @param data ?o`:V|<v
* @param l \%9QE
* @param i +=d=
*/ ]omBq<ox'Y
private void insertSort(int[] data, int start, int len) { 'vYt_T
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); !]5V{3
} fQwLx
} \/C5L:|p_
} wCV~9JTJ!
} u?rX:KkS
bvHQ#:}H
堆排序： bR1Q77<G\
7F_N{avr
package org.rut.util.algorithm.support; kZ]pV=\Y*
ur7S K(#
import org.rut.util.algorithm.SortUtil; (Q&O'ng1
@6%7X7m
/** }$sTnea
* @author treeroot mi7~(V>
* @since 2006-2-2 KfYT
* @version 1.0 vT @25
*/ W`P>vK@=
public class HeapSort implements SortUtil.Sort{ :."6g)T
I[?bM-
/* (non-Javadoc) sl(go^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) uHRxV"@}[1
*/ "c?31$6
public void sort(int[] data) { xn@oNKD0
MaxHeap h=new MaxHeap(); g>#}(u!PH
h.init(data); (9=E5n6o
for(int i=0;i h.remove(); vP+qwvpGr
System.arraycopy(h.queue,1,data,0,data.length); HV7f%U
} G'';VoW=
0P{8s
private static class MaxHeap{ "!fwIEG
;g;1<? [
void init(int[] data){ LU8:]zOY
this.queue=new int[data.length+1]; ^QG<_Dm]
for(int i=0;i queue[++size]=data; aR'~=t&;z1
fixUp(size); ori[[~OyB
} FQE(qltf,
} Vg :''!4t2
P}>>$$b\Yi
private int size=0; Ab:ah7!
,rF!o_7
private int[] queue; G:wO1f6
3OY(L`
public int get() { &}|`h8JA]K
return queue[1]; J\p-5[E
} B/^o$i
H0yM`7[y
public void remove() { e 'F:LMX
SortUtil.swap(queue,1,size--); vlipB}
fixDown(1); c/:k|x
} ZG{#CC=
file://fixdown d2)]6)z6
private void fixDown(int k) { U.b|3E/^
int j; (<@`MPI\@
while ((j = k << 1) <= size) { iel@"E 4
if (j < size %26amp;%26amp; queue[j] j++; rz2,42H]
if (queue[k]>queue[j]) file://不用交换 jGo\_O<of
break; qn,fx6v4
SortUtil.swap(queue,j,k); +x/vZXtOK
k = j; :#{0yno)H
} Iz;^D!
} Q`Q"p
private void fixUp(int k) { yF_/.mI
while (k > 1) { _34%St!lg
int j = k >> 1; @v!#_%J
if (queue[j]>queue[k]) {x[C\vZsi]
break; }_mMQg2>=
SortUtil.swap(queue,j,k); o>T+fBHE
k = j; y\[* mgl:
} fF=tT C
} ]{#Xcqx
Y=O-^fL
} 1CM8P3
NR-<2 e3
} B[ D s?:
Bn=YGEvz
SortUtil： g[~J107%A
h0$ \JXk
package org.rut.util.algorithm; \OWxf[
Lxv_{~I*
import org.rut.util.algorithm.support.BubbleSort; 1,U)rx$H
import org.rut.util.algorithm.support.HeapSort; 0]$-}AYM
import org.rut.util.algorithm.support.ImprovedMergeSort; ,S@B[+VZ
import org.rut.util.algorithm.support.ImprovedQuickSort; V?`|Ha}
import org.rut.util.algorithm.support.InsertSort; zy8+~\a+Y&
import org.rut.util.algorithm.support.MergeSort; SJ:Teab
import org.rut.util.algorithm.support.QuickSort; fA[T5<66
import org.rut.util.algorithm.support.SelectionSort; o]&P0 b
import org.rut.util.algorithm.support.ShellSort; &%k_BdlkQ
~ahu{A4Bw
/** CyB4apJ
* @author treeroot <1:I[b
* @since 2006-2-2 L'"c;FF02i
* @version 1.0 x&m(h1h
*/ $(08!U
public class SortUtil { mv`b3 $
public final static int INSERT = 1; nPl,qcyY
public final static int BUBBLE = 2; ?P#\CW
public final static int SELECTION = 3; %|f@WxNrU
public final static int SHELL = 4; ~x@V"rxGw
public final static int QUICK = 5; F[F NtZ
public final static int IMPROVED_QUICK = 6; 0;*[}M]Z
public final static int MERGE = 7; /q7$"wP
public final static int IMPROVED_MERGE = 8; xon^=Wo;
public final static int HEAP = 9; JS<w43/j
Ad>@8^
public static void sort(int[] data) { $?VYHkX
sort(data, IMPROVED_QUICK); qLKL*m
} #SjCKQ~
private static String[] name={ De>,i%`Q,D
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" -lq`EB+
}; -~H "zu`
ymnK`/J!Q
private static Sort[] impl=new Sort[]{ FP0GE
new InsertSort(), g:p`.KuB
new BubbleSort(), +JXn
new SelectionSort(), A_2lG!! 6
new ShellSort(), v;}MHl
new QuickSort(), CP$,fj
new ImprovedQuickSort(), ~3-+~y=o~
new MergeSort(), ?[WUix;
new ImprovedMergeSort(), -yu$Mm
new HeapSort() s&wm^R
}; hAP2DeT$
6{g&9~V
public static String toString(int algorithm){ D4$"02"
return name[algorithm-1]; WU.eeiX
} l <Z7bo
r&:yZN
public static void sort(int[] data, int algorithm) { :6m"}8*q8
impl[algorithm-1].sort(data); AI,E9
} 300[2}Y]
9+.3GRt7
public static interface Sort { I).eQ8:
public void sort(int[] data); L}_VT J
} { Q!Xxe>6
+apn3\_
public static void swap(int[] data, int i, int j) { 1}p:]/;
int temp = data; 5>=4$!`
data = data[j]; f3h]t0M
data[j] = temp; 2n#H%&^?a
} }/IP\1bG
} (hRg0Z=