[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; Nl[&rZ-&
} S3/%;=|
int i1=l; 1J0gjO)AZ
int i2=mid+1; 0Xb\w^
for(int cur=l;cur<=r;cur++){ l<XYDb~op
if(i1==mid+1) ntLEk fK{
data[cur]=temp[i2++]; 8\68NG6o
else if(i2>r) !-tw
data[cur]=temp[i1++]; _{c_z*rM8
else if(temp[i1] data[cur]=temp[i1++]; ATqblU>D
else O|sk"YXF
data[cur]=temp[i2++]; O)`L( x
} KANR=G
} hlL$3.]
FkrXM!mJ
} |l8=z*v<
(mp
改进后的归并排序: 2b7-=/[6
<=p>0L
package org.rut.util.algorithm.support; 0 aH&M4
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import org.rut.util.algorithm.SortUtil; #&T O(bk
k Nc-@B
/** rX)&U4#[m
* @author treeroot v4hrS\M
* @since 2006-2-2 3N$@K"qM#
* @version 1.0 "LlQl3"=
*/ C*ep8{B
public class ImprovedMergeSort implements SortUtil.Sort { ewd eC
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private static final int THRESHOLD = 10; QTBc_Z
VOD-< "|
/* Awa| (]
* (non-Javadoc) nBp6uNK[
* }0pp"[JU
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /%g9g_rt#
*/ \_O#M
public void sort(int[] data) { 5H.~pc2y
int[] temp=new int[data.length]; hy~[7:/<I&
mergeSort(data,temp,0,data.length-1); %IBT85{
} _U&HXQ8X
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private void mergeSort(int[] data, int[] temp, int l, int r) { D&pn@6bB
int i, j, k; @Pk<3.S0
int mid = (l + r) / 2; n[0u&m8
if (l == r) ;>mM9^Jaf
return; ( jU $
if ((mid - l) >= THRESHOLD) ymxA<bICS8
mergeSort(data, temp, l, mid); BW)-F (v
else 1s(T#jh
insertSort(data, l, mid - l + 1); g ptf*^s
if ((r - mid) > THRESHOLD) xjr4')h
mergeSort(data, temp, mid + 1, r); T`wDdqWbEG
else SI~jM:S}
insertSort(data, mid + 1, r - mid); jbipNgxkr
vN^.MR+<
for (i = l; i <= mid; i++) { V3ht:>c9qs
temp = data; 1v|-+p42
} VA[EY`8
for (j = 1; j <= r - mid; j++) { Hc'Pp{| X
temp[r - j + 1] = data[j + mid]; @U8u6JNK'
} JWd[zJ[
int a = temp[l]; mq[=,,#
int b = temp[r]; 0Qa0
for (i = l, j = r, k = l; k <= r; k++) { Y[f]L4,V
if (a < b) { avq$aq(3&
data[k] = temp[i++]; `sqr>QD
a = temp; 0#OyT'~V%
} else { OiQf=Uz\
data[k] = temp[j--]; :wS&3:h
b = temp[j]; NH|I>vyN
} _cQ '3@
} is8i_FoD,n
} vcdVck@
" Bx@(
/** GIzB1cl:
* @param data Op-z"inw
* @param l )9"^ D
* @param i ^'E^*R
*/ FShjUl>mV
private void insertSort(int[] data, int start, int len) { I;NW!"pU
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Ur#jJR@%3
} +Mq\3
} '(@q"`n
} ZwBz\jmbP
} IMwV9rF
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堆排序： w{aGH/LN
3h:~NL
package org.rut.util.algorithm.support; Cd)g8<
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import org.rut.util.algorithm.SortUtil; 3[u- LYW
lo>9 \ Po
/** -$<oY88
* @author treeroot )nO ^Ay
* @since 2006-2-2 }R<t=):
* @version 1.0 t9U6\ru
*/ 5NZuaN
public class HeapSort implements SortUtil.Sort{ Jm<NDE~rw
C zJ-tEO
/* (non-Javadoc) w\GJ,e
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4,LS08&gh
*/ T"{~mQ*
public void sort(int[] data) { kMCP .D45;
MaxHeap h=new MaxHeap(); */h(4Hz
h.init(data); _y[C52,
for(int i=0;i h.remove(); se %#U40*
System.arraycopy(h.queue,1,data,0,data.length); + )Qu,%2
} e-y$&[
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private static class MaxHeap{ d.+
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void init(int[] data){ ru 6`Z+p
this.queue=new int[data.length+1]; [<@T%yq
for(int i=0;i queue[++size]=data; UxNn5(:sM@
fixUp(size); +8zACs{p
} U\lbh;9G
} E2r5Pg
aInt[D(
private int size=0; ~|Vqv{
qI9j=4s.
private int[] queue; 6ioj!w<N
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public int get() { +pqbl*W;1
return queue[1]; s 1M-(d Q
} 8<;.
zK~8@{l}_"
public void remove() { 3R<r[3WP
SortUtil.swap(queue,1,size--); w3,KqF
fixDown(1); CmBPCjh
} C`[2B0
file://fixdown C{/U;Ie-b
private void fixDown(int k) { #).^k-
int j; ^5]9B<i[Y
while ((j = k << 1) <= size) { #6\mTL4vg
if (j < size %26amp;%26amp; queue[j] j++; 3g!Z[SZ
if (queue[k]>queue[j]) file://不用交换 4A@HR
break; Wd7*7']
SortUtil.swap(queue,j,k); 8J'5%$3u
k = j; u;$qJjS N
} B0b|+5WhR
} k_}$d{X
private void fixUp(int k) { $V3If
while (k > 1) { L?nhm=D
int j = k >> 1; MXaik+2
if (queue[j]>queue[k]) >bV3~m$a+
break; |.Vgk8oTl
SortUtil.swap(queue,j,k); v];YC6shx
k = j; 8i] S[$Fc
} t`Bk2Cc)+
} } 9zi5o8
o=Z:0Ukl]
} *Hn=)q
zqj|$YNC
} Fxa{ 9'99
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SortUtil： [xM&Jdf8
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package org.rut.util.algorithm; #9(+)~irz`
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import org.rut.util.algorithm.support.BubbleSort; |Jx:#OM
import org.rut.util.algorithm.support.HeapSort; 25Z}.))
import org.rut.util.algorithm.support.ImprovedMergeSort; W]Xwt'ABz
import org.rut.util.algorithm.support.ImprovedQuickSort; %R4 \[e
import org.rut.util.algorithm.support.InsertSort; DtBvfYO8)>
import org.rut.util.algorithm.support.MergeSort; HR?T
import org.rut.util.algorithm.support.QuickSort; Wy-_}wqHg
import org.rut.util.algorithm.support.SelectionSort; AAfU]4u0S
import org.rut.util.algorithm.support.ShellSort; ,K}"o~z
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/** O8#]7\)
* @author treeroot vX>{1`e{S
* @since 2006-2-2 [O\)R[J
* @version 1.0 iuWUr?`\
*/ cRKLyb
public class SortUtil { 8OOAPp$%|
public final static int INSERT = 1; s2,6aW C
public final static int BUBBLE = 2; D6lzcf
public final static int SELECTION = 3; !)oQ9,N
public final static int SHELL = 4; K@n-#
public final static int QUICK = 5; DC).p'0VL
public final static int IMPROVED_QUICK = 6; ep3VJ"^
public final static int MERGE = 7; 6k@F?qHS
public final static int IMPROVED_MERGE = 8; ]/h$6mrL
public final static int HEAP = 9; '['%b
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public static void sort(int[] data) { *Jcd_D\-(1
sort(data, IMPROVED_QUICK); 2|?U%YrHWs
} IY.M#Q]
private static String[] name={ J[l7p6xk
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" F/Js K&&
}; rCqwJoC`v
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private static Sort[] impl=new Sort[]{ z4D)Xy"/
new InsertSort(), 'J*'{
new BubbleSort(), +(x(Ybl#
new SelectionSort(), \h[*oeh
new ShellSort(), RU/WI<O
new QuickSort(), =g6~2p=H
new ImprovedQuickSort(), V(K;Gc
new MergeSort(), !lg_zAV
new ImprovedMergeSort(), MjQ>&fUK
new HeapSort() J0k!&d8
}; U&(gNuR>J
:s+?"'DP
public static String toString(int algorithm){ k {{eyC
return name[algorithm-1]; ._p2"<
} ]Z UE !
j@nK6`d+1
public static void sort(int[] data, int algorithm) { JO]?u(m01
impl[algorithm-1].sort(data); 19R~&E's
} &to~#.qc
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public static interface Sort { I3.JAoB>!
public void sort(int[] data); _0 43,
} ]Rf$&7`g{
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public static void swap(int[] data, int i, int j) { ?2o+x D2
int temp = data; DJdhOLx
data = data[j]; Q& d;UVp
data[j] = temp; HqqMX`Rof
} ,b^jAzow
} 30w(uF