[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; ;$QC_l''b
} 27EK+$
int i1=l; @eJCr)#}
int i2=mid+1; <.Ws; HN}
for(int cur=l;cur<=r;cur++){ ?@ F2Kv
if(i1==mid+1) q0iJy@?A
data[cur]=temp[i2++]; hq)1YO
else if(i2>r) 'v"=
data[cur]=temp[i1++]; |;vQ"8J
else if(temp[i1] data[cur]=temp[i1++]; SVZocTt
else v1TFzcHl<
data[cur]=temp[i2++]; Ho>Np&
} r-<O'^C
} dE7S[O
^U}k
} t:2v`uk
z3Q&O$5\
改进后的归并排序: .\n` 4A1z
+n)n6}S
package org.rut.util.algorithm.support; T.4&P#a1
T#))_aC
import org.rut.util.algorithm.SortUtil; p+;& Gg54
%{@Q7
/** ?13qDD:
* @author treeroot xG9Sk
* @since 2006-2-2 >?, Zn
* @version 1.0 ;]u9o}[ 2
*/ wI$a1H
public class ImprovedMergeSort implements SortUtil.Sort { {FNkPX
?, S/>SP
private static final int THRESHOLD = 10; rmiOeS`:
=~B"8@B
/* CMXF[X)%
* (non-Javadoc) K#0TD("
* aQCu3T
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ieFl4hh[G
*/ 8]ZzO(=@{
public void sort(int[] data) { .T| }rB<c
int[] temp=new int[data.length]; 0zaK&]oY0
mergeSort(data,temp,0,data.length-1); =dmr,WE
} T5(S2^)o
Y;"k5+ q
private void mergeSort(int[] data, int[] temp, int l, int r) { X@rA2);6
int i, j, k; TSlB.pw%v
int mid = (l + r) / 2; #Wk=y?sn
if (l == r) M|WBJ'#x0
return; Y%pab/Y
if ((mid - l) >= THRESHOLD) -8Jw_
mergeSort(data, temp, l, mid); CM;b_E)9)f
else =p+y$
insertSort(data, l, mid - l + 1); !%iHJwS#
if ((r - mid) > THRESHOLD) E TT46%Y
mergeSort(data, temp, mid + 1, r); (W ~K1]
else ZK5nN9`
insertSort(data, mid + 1, r - mid); S+ kq1R
)cqD">vs
for (i = l; i <= mid; i++) { CU'JvVe3
temp = data; l~c[}wv
} CMa6':~
for (j = 1; j <= r - mid; j++) { ~r1pO#r-
temp[r - j + 1] = data[j + mid]; &Y{^yb
} szI7I$Qb
int a = temp[l]; M/zO|-j&
int b = temp[r]; ,_2-Op
for (i = l, j = r, k = l; k <= r; k++) { T5S4,.o9W
if (a < b) { >STtX6h
data[k] = temp[i++]; jD: N)((
a = temp; %;PpwI
} else { Q7BbST+
data[k] = temp[j--]; fB+L%+mr8
b = temp[j]; y&/IJst&aq
} C($l'jd&
} !"rPSGK*
} xa>| k>I
c{z$^)A/
/** ;]{ee?Q^ld
* @param data B,%Vy!o
* @param l dY*q[N/pO
* @param i "mlQ z4D)5
*/ @60D@Y
private void insertSort(int[] data, int start, int len) { 2w 2Bc+#o
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); C]`uC^6g
} *l2`- gbE
} l/eF P
} @~3--
} +iVEA(0&$
p"g|]@m
堆排序： ,eXtY}E
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package org.rut.util.algorithm.support; 7=!9kk0
wPA^nZ^}9c
import org.rut.util.algorithm.SortUtil; $l7^-SK`E
64s;EC
/** AK:cDKBO
* @author treeroot o[|[xuTm
* @since 2006-2-2 Y'v[2s
* @version 1.0 ]lB zpD
*/ 5xQ-f
public class HeapSort implements SortUtil.Sort{ >=~\b
2]>O ZhS
/* (non-Javadoc) zM'eqo>!c>
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ^Q6J$"Tj
*/ N]<(cG&p
public void sort(int[] data) { (3#PKfY+
MaxHeap h=new MaxHeap(); 5KCB^`|b>t
h.init(data); nxLuzf4U5
for(int i=0;i h.remove(); QV;o9j
System.arraycopy(h.queue,1,data,0,data.length); D /eH~
} 9!FX*}dC
$.G 7Vt
private static class MaxHeap{ v+c>iI
|V9[aa*c
void init(int[] data){ d*(aue=
this.queue=new int[data.length+1]; &!!*xv-z
for(int i=0;i queue[++size]=data; 5>k:PKHL
fixUp(size); ?jx]%n fV
} VF]AH}H8I
} nm'l}/Ug
dC11kqqj
private int size=0; _z\/{
/d`"WK,
private int[] queue; ^^y eC|~N:
fgLjF,Y
public int get() { \}jMC
return queue[1]; _fAgp_)
} *Gsj pNr-
+y7z>Fwl
public void remove() { %@$UIO,(
SortUtil.swap(queue,1,size--); 0I}e>]:I
fixDown(1); 'B@`gA
} m[hL GD'Fi
file://fixdown X>q`F;W
private void fixDown(int k) { lu8G$EQI
int j; rfXxg^
while ((j = k << 1) <= size) { ys_2?uv
if (j < size %26amp;%26amp; queue[j] j++; Nw;qJ58@
if (queue[k]>queue[j]) file://不用交换 0|3I^b
break; &|yLTx
SortUtil.swap(queue,j,k); IwYeKN6s
k = j; {#,<)wFV\
} }^"6:;,
} .;#T<S"
private void fixUp(int k) { TpjiKM
while (k > 1) { >{#JIG.
int j = k >> 1; Q*ITs!~Z
if (queue[j]>queue[k]) \pmS*Dt
break; GES}o9?#
SortUtil.swap(queue,j,k); rxY|&!f
k = j; 53Adic
} &L o TO+
} g \mE
9zaNfs
} nt.LiM/L
QX,$JM3
} @gUp9ZwtH
=BJLj0=N
SortUtil： %sa?/pjK
j"W>fC/u
package org.rut.util.algorithm; +UzQJt/>>
W4^L_p>Tm^
import org.rut.util.algorithm.support.BubbleSort; ;vn0%g
import org.rut.util.algorithm.support.HeapSort; (?FH`<
import org.rut.util.algorithm.support.ImprovedMergeSort; Hv,|XE@Y
import org.rut.util.algorithm.support.ImprovedQuickSort; Ufr@j` *
import org.rut.util.algorithm.support.InsertSort; pR0[qsQM
import org.rut.util.algorithm.support.MergeSort; 1wSAwpz
import org.rut.util.algorithm.support.QuickSort; \Z{tC$|H
import org.rut.util.algorithm.support.SelectionSort; uvys>]+
import org.rut.util.algorithm.support.ShellSort; iP:i6U]
|vI*S5kn6A
/** QM$UxWo-
* @author treeroot ZOK!SBn^?
* @since 2006-2-2 6[bopin
* @version 1.0 D9rQ%|}S
*/ 6BE,L
public class SortUtil { ep>!jMhJa
public final static int INSERT = 1; wj[yo S
public final static int BUBBLE = 2; _]:b@gXUw
public final static int SELECTION = 3; *k?:k78L
public final static int SHELL = 4; E)b$;'
public final static int QUICK = 5; R2bqhSlF
public final static int IMPROVED_QUICK = 6; bM W|:rn
public final static int MERGE = 7; F.s$Y+c!6
public final static int IMPROVED_MERGE = 8; 2.qPMqH
public final static int HEAP = 9; K#"=*p,
[8V;Q
public static void sort(int[] data) { ~ |G&cg
sort(data, IMPROVED_QUICK); lg%fjBY
} Vaxg
private static String[] name={ !-I,Dh-A
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" DE13x*2
}; 5Cf!NNV
4jT6h9%
private static Sort[] impl=new Sort[]{ /2^L;#
new InsertSort(), iTxWXij
new BubbleSort(), n Ja!&G&
new SelectionSort(), [9E~=A#
new ShellSort(), z8=THz2f
new QuickSort(), vu0Ql1
new ImprovedQuickSort(), pn"!wqg
new MergeSort(), w\C1Bh!
new ImprovedMergeSort(), %-hSa~20
new HeapSort() uWS]l[Ga
}; [@$ SLl^Y
]:%DDlRb
public static String toString(int algorithm){ ?G{0{c2
return name[algorithm-1]; >t+ ENYb
} &61U1"&$R
lZzW- %K
public static void sort(int[] data, int algorithm) { J+D|/^
impl[algorithm-1].sort(data); :UwBs
} KQ~y;{h?b
oZ{,IZ45
public static interface Sort { HG"ZN)~
public void sort(int[] data); ammi4k/
} fe .=Z&
c!w[)>v
public static void swap(int[] data, int i, int j) { '1u?-2
int temp = data; }n)0}U5;0
data = data[j]; fy+5i^{=
data[j] = temp; g-3^</_fZ
} +'F;\E
} >N&{DJmD