[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; \GL] I.
} 5Y *4a%"
int i1=l; 6|eqQ+(A
int i2=mid+1; Tw-NIT)
for(int cur=l;cur<=r;cur++){ WGv47i
if(i1==mid+1) |]< 3cW+
data[cur]=temp[i2++]; gy.UTAs N
else if(i2>r) GQbr}xX.#
data[cur]=temp[i1++]; On*I.~
else if(temp[i1] data[cur]=temp[i1++]; ga +, P
else ]d1'5F][H
data[cur]=temp[i2++]; Ih.+-!w
} ^77W#{Zs
} uyYV_Q0~;
j.&dHtp
} t(3f} ?
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改进后的归并排序: dL0Q8d\^T
6&$.E! z
package org.rut.util.algorithm.support; B/4M;G~
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import org.rut.util.algorithm.SortUtil; `]5qIKopL
$)#orZtzr
/** Al^tM0T^
* @author treeroot hju^x8 ,=m
* @since 2006-2-2 Fe!MA
* @version 1.0 8$}<4 `39
*/ > Z+*tq
public class ImprovedMergeSort implements SortUtil.Sort { Y+"1'W
C!+D]7\j
private static final int THRESHOLD = 10; 63oe0T&
}h^ fX
/* _mqU:?Q5
* (non-Javadoc) bL7Gkbs&|
* Cu+p!hV
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {]dxFhe)
*/ :TTq
public void sort(int[] data) { =p;cJ%#2]'
int[] temp=new int[data.length]; d_`MS@2
mergeSort(data,temp,0,data.length-1); ":/c|!
} C98F?uo%Q
{bXN[=j
private void mergeSort(int[] data, int[] temp, int l, int r) { *ak0(yLn)
int i, j, k; T~xVHk1
int mid = (l + r) / 2; (u 7Lh>6%
if (l == r) a[K&;)
return; L/u|90)L
if ((mid - l) >= THRESHOLD) +ayC0
mergeSort(data, temp, l, mid); LaJvPOQ
else J&aN6l?
insertSort(data, l, mid - l + 1); J2Dn
if ((r - mid) > THRESHOLD) @(#vg\UH
mergeSort(data, temp, mid + 1, r); U,U=udsi
else pb97S^K[
insertSort(data, mid + 1, r - mid); UCVYO. 9"
)xcjQkb
for (i = l; i <= mid; i++) { VZqCFE3
temp = data; &4OJJ9S
} Ar>B_*dr
for (j = 1; j <= r - mid; j++) { )|=1;L
temp[r - j + 1] = data[j + mid]; V(TtOuv
} I">">
int a = temp[l]; xo@1((|z
int b = temp[r]; hF-QbO
for (i = l, j = r, k = l; k <= r; k++) { KiXfR\S~C
if (a < b) { 4 ?BQ&d
data[k] = temp[i++]; eX"%b(;s
a = temp; "_UnN}Uk
} else { j/TnKO
data[k] = temp[j--]; 51ViJdZ
b = temp[j]; |cC3L09
} o+|>D&CW%
} ;!HQ!#B
} }Q`+hJ0
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/** x_7$g<n
* @param data gxO~44"
* @param l 0o8`Y
* @param i 7X(2SI3m
*/ ;l%xjMcU
private void insertSort(int[] data, int start, int len) { _`SDG5
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); CNRSc4Le
} XgxO:"B
} W<q<}RSn
} %i?
} Py*WHHO
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堆排序： j*QdD\)
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package org.rut.util.algorithm.support; Qy9_tvq X
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import org.rut.util.algorithm.SortUtil; |r+ x/,2-
4]1/{</B|
/** 6?,qysm06
* @author treeroot xtGit}
* @since 2006-2-2 J;>;K6pW
* @version 1.0 ILCh1=?{9r
*/ <Ch9"1f3,
public class HeapSort implements SortUtil.Sort{ ?*V\ -7jg
mZU L}[xf
/* (non-Javadoc) #eYYu2ND
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) (g;O,`|c,
*/ `n6cpX5
public void sort(int[] data) { ;^:8F
MaxHeap h=new MaxHeap(); k:n{AoUc
h.init(data); L/fXP@u
for(int i=0;i h.remove(); ;*rGZ?%*
System.arraycopy(h.queue,1,data,0,data.length); 5%D`y|
} yPmo1|'X>d
3F,M{'q
private static class MaxHeap{ ;jxX/c
2+u+9rW
void init(int[] data){ @~gPZm
this.queue=new int[data.length+1]; -)%\$z
for(int i=0;i queue[++size]=data; >yc),]1~
fixUp(size); (w-"1(
} < R"Y^]P=
} MVMJl">
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private int size=0; ~ tR!hc}
HCr}|DxyK
private int[] queue; Ip{hg,>
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public int get() { hg12NzbK
return queue[1]; y:\<FLR}j
} * 0K]/tn<
9V)cf
public void remove() { )*%uG{h
SortUtil.swap(queue,1,size--); e3n^$'/\r
fixDown(1); &LM@xt4"^[
} VXCB.C"
file://fixdown 53/$8=
private void fixDown(int k) { ;nh_L(
int j; ],AtR1k
while ((j = k << 1) <= size) { eAO@B
if (j < size %26amp;%26amp; queue[j] j++; G>^= Bm_$
if (queue[k]>queue[j]) file://不用交换 qh bagw~
break; zk }SEt-
SortUtil.swap(queue,j,k); 5[\g87\
k = j; bLl ?!G.
} /E/6(c
} ]l }v
private void fixUp(int k) { \Uh/(q7
while (k > 1) { 0F uj-q
int j = k >> 1; W' Y<iA
if (queue[j]>queue[k]) {B=64,D^7R
break; YeJTB}
SortUtil.swap(queue,j,k); `!N.1RP _
k = j; Wv5=$y
} >mQD/U
} Up-^km
?/}IDwuh
} / !h<+
pV<K=;:x>
} ?`vGpi~
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SortUtil： 7.{+8#~nV
zKk=R6w
package org.rut.util.algorithm; 6k')12~'
hJFxT8B/
import org.rut.util.algorithm.support.BubbleSort; kK/>,Eg
import org.rut.util.algorithm.support.HeapSort; 0dx%b677d
import org.rut.util.algorithm.support.ImprovedMergeSort; @ #J2t#
import org.rut.util.algorithm.support.ImprovedQuickSort; V#599-
import org.rut.util.algorithm.support.InsertSort; 0XE6Hw
import org.rut.util.algorithm.support.MergeSort; JWu0VLo
import org.rut.util.algorithm.support.QuickSort; Y)8 Py1}
import org.rut.util.algorithm.support.SelectionSort; XR=ebl
import org.rut.util.algorithm.support.ShellSort; 5a6d3u/
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/** e}gGl<((g
* @author treeroot (CDh,ZN;|
* @since 2006-2-2 Aa-OMo;~
* @version 1.0 Gf7r!Ur;g
*/ 3-y2i/4}$
public class SortUtil { V 7 p{'C
public final static int INSERT = 1; rk+s[Qi~
public final static int BUBBLE = 2; 9~ V(wG
public final static int SELECTION = 3; (CAVOed
public final static int SHELL = 4; ,o2x,I
public final static int QUICK = 5; ).Z U0fV
public final static int IMPROVED_QUICK = 6; f U<<GK70
public final static int MERGE = 7; `)=sQ2P
public final static int IMPROVED_MERGE = 8; fuf'r>1n
public final static int HEAP = 9; L$Xkx03lz>
}lkU3Pf1U
public static void sort(int[] data) { 4d`f?8vS
sort(data, IMPROVED_QUICK); ktY
} DBfq9%J _
private static String[] name={ &4t=Y`]SL
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" }P!:0w3
}; 2zsDb'r
$*fEgU% c
private static Sort[] impl=new Sort[]{ TD;u"
new InsertSort(), OS~Z@'Eg
new BubbleSort(), Fyz1LOH[X
new SelectionSort(), ]7,0}q.
new ShellSort(), 41C6ey
new QuickSort(), gf;B&MM6
new ImprovedQuickSort(), fob.?ID-;
new MergeSort(), &)Vuh=
new ImprovedMergeSort(), T~lHm
new HeapSort() % y` tDR
}; lR ZuXo9<
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public static String toString(int algorithm){ _P_R`A)"
return name[algorithm-1]; Re;[S[D7
} (^|vN;
0;5qo~1
public static void sort(int[] data, int algorithm) { utdus:B#0
impl[algorithm-1].sort(data); -!j5j:RR
} ,PWMl[X
0VgsV;
public static interface Sort { *%]&5
public void sort(int[] data); |'k7 ;UW
} jjoyMg95
=,U~
public static void swap(int[] data, int i, int j) { Cj)*JZVG
int temp = data; +o6"Z)
data = data[j]; I&&[ ':
data[j] = temp; |3EKK:RE
} uw&p)
} !M7727