[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; p7?
} vDy&sgS$<
int i1=l; p7h#.m~Qu
int i2=mid+1; WWT1=#"
for(int cur=l;cur<=r;cur++){ EeIDlm0o
if(i1==mid+1) }\pI`;*O|
data[cur]=temp[i2++]; PT"}2sR)
else if(i2>r) ~5 ^Jv m
data[cur]=temp[i1++]; 3Ob.OwA
else if(temp[i1] data[cur]=temp[i1++]; R[WiW RfD
else 9g92eKS
data[cur]=temp[i2++]; 2wf&jGHs
} u8e_Lqx?
} OWd'z1Yl
GkIE;7#2kX
} v gN!9
n,la<N]
改进后的归并排序: Bq0 \T 0,
7 ,Rg~L
package org.rut.util.algorithm.support; :Pud%}'
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import org.rut.util.algorithm.SortUtil; "Fz.#U
c:[k+_Zr
/** ?J[3_!"t
* @author treeroot "fFSZ@,r
* @since 2006-2-2 yDWIflP0;
* @version 1.0 _|HhT^\P
*/ 3v* ~CQy9
public class ImprovedMergeSort implements SortUtil.Sort { QYJ EUC@
2*Z2uV^
private static final int THRESHOLD = 10; 8*ZsR)!
voWH.[n^_
/* 49$P
* (non-Javadoc) <@<rU:o=V
* Z`Yt~{,Q
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) M5xJ_yjG
*/ Qm%F]nyy
public void sort(int[] data) { I[Ra0Q>([k
int[] temp=new int[data.length]; T U%@_vYR
mergeSort(data,temp,0,data.length-1); OvdT* g=8*
} rk=D5E7
N2r zHK
private void mergeSort(int[] data, int[] temp, int l, int r) { }r}*=;Ea
int i, j, k; ZWs
int mid = (l + r) / 2; +2uSMr
if (l == r) xn8KOwX%
return; =8^+M1I
if ((mid - l) >= THRESHOLD) <,d550GSm
mergeSort(data, temp, l, mid); 37AVk`a
else 5>532X(0
insertSort(data, l, mid - l + 1); 9+.wj/75
if ((r - mid) > THRESHOLD) qY_qS=H^
mergeSort(data, temp, mid + 1, r); yzK;
else vSzpx
insertSort(data, mid + 1, r - mid); t0)1;aBZ
8`=?_zF
for (i = l; i <= mid; i++) { {@Wv@H+4
temp = data; %idBR7?`g
} 7Q 3!=b
for (j = 1; j <= r - mid; j++) { 5=>1>HYM
temp[r - j + 1] = data[j + mid]; 6W1GvM\e
} dBWny&
int a = temp[l]; b F=MQ
int b = temp[r]; s.3"2waZ=T
for (i = l, j = r, k = l; k <= r; k++) { 3G})$y3m
if (a < b) { P8 X07IK
data[k] = temp[i++]; Ik G&
a = temp; 5'%I4@Qn+
} else { OV>&`puL
data[k] = temp[j--]; ^@fD{]I
b = temp[j]; ,0l Od<
} U,<m%C"
} l.YE@EL
} fHt\KP
=C %)(|
/** bQ<qdGa
* @param data <'y<8gpM
* @param l }\4yU=JPK
* @param i 24sMX7Q,i
*/ 5Rqdo\vE
private void insertSort(int[] data, int start, int len) { Pz4#>tP
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); "k zKQ~
} *D5 xbkH=.
} blc?[ [,!
} [-~pDkf:
} Met?G0[
W"{Ggk`
堆排序： l1KMEGmG
hCxg6e<[
package org.rut.util.algorithm.support; p_$^keOL
]uXJjS f
import org.rut.util.algorithm.SortUtil; (qn=BPI
~(kEGEF
/** osV6=
* @author treeroot GT{4L]C
* @since 2006-2-2 72HA.!ry
* @version 1.0 "ubp`7%67
*/ Ds1h18
public class HeapSort implements SortUtil.Sort{ *PmZqe
fRp]
/* (non-Javadoc) \"P{8<h.3
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [6GYYu\
*/ >hunV'vu'
public void sort(int[] data) { +Z`=iia>
MaxHeap h=new MaxHeap(); y6(PG:L
h.init(data); {!,K[QwcI
for(int i=0;i h.remove(); E@}F^0c
System.arraycopy(h.queue,1,data,0,data.length); ?Uql30A
} l4C{LZ
"t|)Kl
private static class MaxHeap{ dX(JV' 18A
+p u[JHF
void init(int[] data){ HoI6(t
this.queue=new int[data.length+1]; *WE8J#]d
for(int i=0;i queue[++size]=data; Q%e<0t7
fixUp(size); ?m7:@GOE1
} l9K`+c+t
} ZL|aB886
wMS%/l0p1
private int size=0; ]n^iG7aB?
q4ROuE|d
private int[] queue; @ @[xTyA
Nt>^2Mv
public int get() { fit{n]g
return queue[1]; EJ:O 1
} {Jn0G;
wt($trJ
public void remove() { m8n)sw,,
SortUtil.swap(queue,1,size--); `_/bg(E
fixDown(1); --h\tj\U
} ^ h=QpH
file://fixdown LV}R 9f
private void fixDown(int k) { :{u`qi
int j; |q`NJ
while ((j = k << 1) <= size) { VL%. maj
if (j < size %26amp;%26amp; queue[j] j++; OqtGKda
if (queue[k]>queue[j]) file://不用交换 _i_='dsyW/
break; C% -Tw]T$_
SortUtil.swap(queue,j,k); *)m:u:
k = j; 5c- P lm%
} Dka,v
} C-M_:kQ[U
private void fixUp(int k) { +p 6Ty2rz
while (k > 1) { xHgC':l(0
int j = k >> 1; (p]FI#y
if (queue[j]>queue[k]) ?Y"%BS+pt
break; 161P%sGx2
SortUtil.swap(queue,j,k); ,Ckcc
k = j; !Asncc G
} TY8gB!^
} _a09;C
AVT% AS
} 2A_1E\
MQ,K%_m8
} IQ&PPC
WNR]GI
SortUtil： vF\>;pcT
O_QDjxj^rZ
package org.rut.util.algorithm; : (UK'i
uFr12ZFgK
import org.rut.util.algorithm.support.BubbleSort; 0/HFLz'
import org.rut.util.algorithm.support.HeapSort; M9)4ihK
import org.rut.util.algorithm.support.ImprovedMergeSort; Wf c/?{
import org.rut.util.algorithm.support.ImprovedQuickSort; v[L+PD U
import org.rut.util.algorithm.support.InsertSort; a (U52dO,
import org.rut.util.algorithm.support.MergeSort; [?K>s>it
import org.rut.util.algorithm.support.QuickSort; IQ_6DF
import org.rut.util.algorithm.support.SelectionSort; ; Y/nS
import org.rut.util.algorithm.support.ShellSort; j!+jLm!l
%q5dV<X'c
/** [,;Y5#Y[5
* @author treeroot !*]i3 ,{7v
* @since 2006-2-2 4DL;Y
* @version 1.0 }c G)$E
*/ yaz6?,)
public class SortUtil { Yxq!7J
public final static int INSERT = 1; ~n=DI/AJ@-
public final static int BUBBLE = 2; 2u.0AG
public final static int SELECTION = 3; ^ITF*
public final static int SHELL = 4; Sk{skvd;
public final static int QUICK = 5; bPVk5G*ruP
public final static int IMPROVED_QUICK = 6; 461g7R%r
public final static int MERGE = 7; 8063LWV
public final static int IMPROVED_MERGE = 8; SkuR~!
public final static int HEAP = 9; b<FE
('x]@
public static void sort(int[] data) { 4,y7a=qf3
sort(data, IMPROVED_QUICK); f*%kHfaXgN
} Fz#@[1,
private static String[] name={ >zJHvb)b\
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" OIKx:&uIk
}; T"xJY#)}
/r4l7K
private static Sort[] impl=new Sort[]{ XFWpHe_ L
new InsertSort(), $;5Q mKQ'
new BubbleSort(), xPZ>vCg
new SelectionSort(), {aAd (~YZ
new ShellSort(), 1ksFxpE
new QuickSort(), UZ<K'H,q
new ImprovedQuickSort(), ;JxL>K(
new MergeSort(), l"ms:v
new ImprovedMergeSort(), B[8bkFS>]
new HeapSort() s{b\\$Rb
}; Jc":zR@5
O9daeIF0#
public static String toString(int algorithm){ GDSV:]hL
return name[algorithm-1]; }=X: F1S
} Q6m8N
q|*^{(tWs
public static void sort(int[] data, int algorithm) { 3(e_2v
impl[algorithm-1].sort(data); [9sEc
} G&S2U=KdV%
L{1sYR%s\
public static interface Sort { t:2DB)
public void sort(int[] data); $udhTI#,
} 44KoOY_
N3"JouP
public static void swap(int[] data, int i, int j) { gqS9{K(f
int temp = data; "pkdZ
data = data[j]; +/[M Ex=
data[j] = temp; !(lcUdBd
} ~,/@]6S&Y
} ?tYZ/