[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; 3a =KgOvp
} >zhbOkR9c
int i1=l; w%kxY5q
int i2=mid+1; 3.Y/ZWON
for(int cur=l;cur<=r;cur++){ KV Mm<]Z
if(i1==mid+1) 1L3L!@
data[cur]=temp[i2++]; P*_Q8I)Y
else if(i2>r) Y?Xs Z
data[cur]=temp[i1++]; ;s{rJG{inG
else if(temp[i1] data[cur]=temp[i1++]; Rv }e+5F
else 6B&':N98
data[cur]=temp[i2++]; 0q81H./3
} i-$]Tg
} /Ue~W,|
8uNq353
} |#"<{RS+w
`Q,03W#GJ%
改进后的归并排序: ,?728pfw
mI-$4st]
package org.rut.util.algorithm.support; P@)zNik[
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import org.rut.util.algorithm.SortUtil; #49,7OBU
-B'<*Y
/** 2 g,UdG
* @author treeroot }k$2r3
* @since 2006-2-2 b8(94t|;U
* @version 1.0 @#;2P'KL
*/ 40+~;20
public class ImprovedMergeSort implements SortUtil.Sort { ><+wHb
;>bcI).
private static final int THRESHOLD = 10; e~oI0%xl^
R]H/Jv\'
/* v="i0lL_
* (non-Javadoc) !c/G'se
* C0J/FFBQ^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) T|[zk.8=E
*/ .}C pX
public void sort(int[] data) { 0@k)Cz[0;
int[] temp=new int[data.length]; &c%;Lo
mergeSort(data,temp,0,data.length-1); bkTk:-L5:
} eh`n?C
8tJB/Pw`S
private void mergeSort(int[] data, int[] temp, int l, int r) { 4CCtLHb
int i, j, k; hX;JMQ915
int mid = (l + r) / 2; (hr*.NS#
if (l == r) yy8h8{=g
return; k <SFl
if ((mid - l) >= THRESHOLD) 1ayL*tr
mergeSort(data, temp, l, mid); 3@7IY4>o
else _9*3Mr)2N
insertSort(data, l, mid - l + 1); \iVb;7r)9:
if ((r - mid) > THRESHOLD) O!xul$9
mergeSort(data, temp, mid + 1, r); kyR=U`OW
else Qu]F<H*Y|
insertSort(data, mid + 1, r - mid); gqw ]L>Z
PaIE=Q4gJ
for (i = l; i <= mid; i++) { s1~&PH^
temp = data; I8M^]+c
} FK ?g
for (j = 1; j <= r - mid; j++) { =zBc@VTp
temp[r - j + 1] = data[j + mid]; ?9W2wqN>o
} (m:ktd=x
int a = temp[l]; A}"aH
int b = temp[r]; D6z*J?3^#&
for (i = l, j = r, k = l; k <= r; k++) { N#C,q&;
if (a < b) { pT ]:TRPS
data[k] = temp[i++]; df9jT?l
a = temp; s&.VU|=VQ@
} else { 2":{3=oW~
data[k] = temp[j--]; 'TwvkU"
b = temp[j]; :^bjn3b
} 85gdmla@9
} Ynxzkm S
} Z2@_F7cXt
hsCts@R
/** Wy:xiP
* @param data 7j,u&%om
* @param l HnlCEW,^o
* @param i A4Sb(X|j
*/ >n(Ga9E
private void insertSort(int[] data, int start, int len) { wg.TCT2
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ,2>nr goM
} K."%PdC
} qL;u59
} nA1059B
} 5oOF|IYi
4s_|6{ANS
堆排序： t?l0L1;
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package org.rut.util.algorithm.support; d,y%:F 4
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import org.rut.util.algorithm.SortUtil; B QxU~s
1^v?Ly8
/** SJ0IEPk
* @author treeroot a]]>(Txc
* @since 2006-2-2 |i~Ab!*8n
* @version 1.0 oEJYAKN
*/ P&kjtl68Y
public class HeapSort implements SortUtil.Sort{ p3`odmbN
x )w6
/* (non-Javadoc) u#bd*(
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @hVF}ybp
*/ .e Jt]K
public void sort(int[] data) { +!6dsnr8
MaxHeap h=new MaxHeap(); q'9}Hz
h.init(data); P-Upv6J3
for(int i=0;i h.remove(); I 7 B$X=
System.arraycopy(h.queue,1,data,0,data.length); lk(.zYaaN
} P/?'ea
UB9n7L(@c
private static class MaxHeap{ }.S4;#|hw
{vf4l4J(
void init(int[] data){ -ufO,tJRLL
this.queue=new int[data.length+1]; ibj3i7G?
for(int i=0;i queue[++size]=data; =[ZuE0c
fixUp(size); &:@)roCR
} -1z<,IN+
} ,z@"pI b
V/,@hv`+
private int size=0; z%0'v`7
uW{;@ 7N
private int[] queue; lKT<aYX
vCe]iB
public int get() { #[LnDU8>9
return queue[1]; HQ0fY
} H4Lvw8G
+#@)C?G,TF
public void remove() { sc)}r_|g
SortUtil.swap(queue,1,size--); 'jr[ ?WQ
fixDown(1); ^$VH~i&
} Bkaupvv9S
file://fixdown s%OPoRE
private void fixDown(int k) { 7}%Z>
int j; xC}9W6
while ((j = k << 1) <= size) { ze_q+Z
if (j < size %26amp;%26amp; queue[j] j++; tQYkH$e`/{
if (queue[k]>queue[j]) file://不用交换 qy\Z2k
break; kS)azV
SortUtil.swap(queue,j,k); tA{B~>
k = j; *rH#k?
} )Bo]+\2
} ^(c.AYI
private void fixUp(int k) { gAxf5A_x)
while (k > 1) { "'@>cJ=
int j = k >> 1; *^=zQ~
if (queue[j]>queue[k]) 8nKb mjM
break; >"?jW@|g
SortUtil.swap(queue,j,k); >\s8S}p
k = j; U9/6F8D1Y1
} p?idl`?^3
} ih\=mB
ra]lC7<H
} )wdTs>W7
79MF;>=tV
} Gw@]w;ed
-:~"c@D
SortUtil： MIx,#]C&
]mZN18#
package org.rut.util.algorithm; \&#IK9x{
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import org.rut.util.algorithm.support.BubbleSort; hgPzx@
import org.rut.util.algorithm.support.HeapSort; glI4Jb_[
import org.rut.util.algorithm.support.ImprovedMergeSort; s1kG:h2|$
import org.rut.util.algorithm.support.ImprovedQuickSort; q>5K:5
import org.rut.util.algorithm.support.InsertSort; NO'37d
import org.rut.util.algorithm.support.MergeSort; QXLHQ_V
import org.rut.util.algorithm.support.QuickSort; zNRR('B?
import org.rut.util.algorithm.support.SelectionSort; HpGI\s
import org.rut.util.algorithm.support.ShellSort; Zv|TvlyT"
#Et%s8{
/** a]4h5kJ';
* @author treeroot 'fS&WVR?
* @since 2006-2-2 i8Xz'Sw07
* @version 1.0 n5s2\(
*/ 6*r#m%|
public class SortUtil { Zog&:]P'F
public final static int INSERT = 1; kC8M2|L
public final static int BUBBLE = 2; 8H@]v@Z2
public final static int SELECTION = 3; /c|X:F!;X#
public final static int SHELL = 4; RTQtXv6mD
public final static int QUICK = 5; -F~"W@9r
public final static int IMPROVED_QUICK = 6; 4uy:sCmu
public final static int MERGE = 7; 9ymx;
public final static int IMPROVED_MERGE = 8; W\1V`\gF
public final static int HEAP = 9; 2uT"LW/(H
8D:0Vhx\I
public static void sort(int[] data) { Y:#nk.}>
sort(data, IMPROVED_QUICK); kT12
} Dhze2q)o
private static String[] name={ Ra)AQ n
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" _/[}PQC6G
}; ,qu7XFYrY
z;Yo76P
private static Sort[] impl=new Sort[]{ L{F[>^1Sb
new InsertSort(), E E^lw61
new BubbleSort(), DNu-Ce%
new SelectionSort(), HD!2|b~@
new ShellSort(), eo&^~OVT
new QuickSort(), q.s'z}
new ImprovedQuickSort(), L&LAh&%{2
new MergeSort(), dBb &sA-A
new ImprovedMergeSort(), P0<)E
new HeapSort() H{U(Rt]K
}; 5[0W+W
,?oC+9w
public static String toString(int algorithm){ ./i5VBP5
return name[algorithm-1]; `NB6Of*/
} w0&|8y
Y{D?&x%yq
public static void sort(int[] data, int algorithm) { `;HZO8
impl[algorithm-1].sort(data); # ~(lY}
} %@MO5#)NI
f~P~%
public static interface Sort { 3{H&{@Q
public void sort(int[] data); 9(pF!}1%\
} j^6,V\;l
AOv>O52F/Q
public static void swap(int[] data, int i, int j) { vB Vg/
int temp = data; mTBSntZx
data = data[j]; `;)op3A'
data[j] = temp; +HkEbR'G0
} .kc{)d*0K
} }DFZ9,gQ