[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; r(h&=&T6
} BIEc4k5(
int i1=l; J~eY,n.6]
int i2=mid+1; M[}EVt~
for(int cur=l;cur<=r;cur++){ )z&0 g2Am
if(i1==mid+1) \HLI y
data[cur]=temp[i2++]; 9!b,!#=
else if(i2>r) (f#QETiV
data[cur]=temp[i1++]; )SQ*"X4"
else if(temp[i1] data[cur]=temp[i1++]; ?BT\)@h
else +6|Ys
data[cur]=temp[i2++]; Vc.A<(
} Sj]k5(&
} pJrc\`D
z~Ph=1O>p
} [t*m$0[:
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改进后的归并排序: 3G9"La,b
fzO4S^mTo8
package org.rut.util.algorithm.support; AFcsbw
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import org.rut.util.algorithm.SortUtil; L&=j O0_
A`v(hBM
/** P*oKcq1R
* @author treeroot j}uFp|df<
* @since 2006-2-2 ,B%M P<Rz1
* @version 1.0 xB_F?d40T5
*/ Zx,R6@l
public class ImprovedMergeSort implements SortUtil.Sort { E{kh)-
:*gYzk8
private static final int THRESHOLD = 10; aehGT|
m(>_C~rGN
/* EF=.L{
* (non-Javadoc) ZZOBMF7
* lE:X~RO"~
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) (mz5vzyw
*/ CnruaN@
public void sort(int[] data) { ?jbE3fW
int[] temp=new int[data.length]; o"~ODN"L
mergeSort(data,temp,0,data.length-1); @/*{8UBP
} N]R<EBq
IG0$OtG
private void mergeSort(int[] data, int[] temp, int l, int r) { :VP4|H#SP
int i, j, k; })!d4EcZf
int mid = (l + r) / 2; G3n* bv
if (l == r) /AV [g^x2
return; qp 4.XL
if ((mid - l) >= THRESHOLD) Hy5_iYP5
mergeSort(data, temp, l, mid); C=(-oI n
else F+,X%$A#?
insertSort(data, l, mid - l + 1); JW9^C
if ((r - mid) > THRESHOLD) ,X(P/x{B
mergeSort(data, temp, mid + 1, r); ((^jyQ
else )QE7$|s
insertSort(data, mid + 1, r - mid); *cxmQ
9+"D8J7
for (i = l; i <= mid; i++) { QW#]i
temp = data; r`XIn#o
} \s?OvqI:
for (j = 1; j <= r - mid; j++) { V2sWcV?
temp[r - j + 1] = data[j + mid]; J2Y-D'*s
} "<ow;ciJF
int a = temp[l]; In^MZ)?
int b = temp[r]; "}Kvx{L8
for (i = l, j = r, k = l; k <= r; k++) { 2K<rK(
if (a < b) { i)f3\?,,
data[k] = temp[i++]; ]'V8{l
a = temp; )tR5JK} AV
} else { @;kw6f:{d
data[k] = temp[j--]; pg~vteq5
b = temp[j]; V&vU her0
} /:v+:-lU
} (-*NRY3*
} Q:eIq<erY
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/** C-d|;R}Ww
* @param data }qmBn`3R
* @param l u8qL?Aj^
* @param i x%d+~U;$&
*/ 3Yf%M66t
private void insertSort(int[] data, int start, int len) { L0uvRge
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); #\N?ka}!
} 'ah|cMRn
} H .)}|
} EQ`;=I3J9y
} HmKvu"3
Yao>F--?
堆排序： '<~rV
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package org.rut.util.algorithm.support; ]\5@N7h
IF~i*
import org.rut.util.algorithm.SortUtil; NCYN .@J
`GOxFDB.
/** g0Qg]F5D~
* @author treeroot - {<`Z
* @since 2006-2-2 !O F#4N
* @version 1.0 \DBoe:0~
*/ '&#`?\CXX
public class HeapSort implements SortUtil.Sort{ /tRzb8`
n4\6\0jq6
/* (non-Javadoc) R9&T0Qf
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) XRXKO>4q
*/ )bRe"jxn7
public void sort(int[] data) { iz]Vb{5n%
MaxHeap h=new MaxHeap(); @QI]P{
h.init(data); k1Zu&4C\
for(int i=0;i h.remove(); Oh6_Bci
System.arraycopy(h.queue,1,data,0,data.length); Ntr5Q IPd
} sj a;NL
J7$1+|"
private static class MaxHeap{ N[X%tf\L]F
rg+28tlDn
void init(int[] data){ S!.aBAW
this.queue=new int[data.length+1]; HX\@Qws
for(int i=0;i queue[++size]=data; ;wND?:
fixUp(size); >"?HbR9
} $_ub.g|
} '7o'u]
F48:mfj1r
private int size=0; zMs]9o
u_.V]Rjc
private int[] queue; 84L!r
r5Ej
public int get() { zk5sAHQ
return queue[1]; +*,rOK`C
} zf$&+E-
Hb'fEo r
public void remove() { 9(lIz{
SortUtil.swap(queue,1,size--); lMAmico
fixDown(1); !jY/}M~F1
} +4\JY"oi
file://fixdown *LcLYxWo
private void fixDown(int k) { vM~/|)^0sW
int j; i0/gyK
while ((j = k << 1) <= size) { s([9/ED
if (j < size %26amp;%26amp; queue[j] j++; Fp4?/-]
if (queue[k]>queue[j]) file://不用交换 *E:w377<}
break; W093rNF~
SortUtil.swap(queue,j,k); d=WC1"
k = j; T[a1S?_*T
} ju0]~,
} %8/Gsu;
private void fixUp(int k) { ehCc N4V(
while (k > 1) { dgd&ymRm :
int j = k >> 1; {l{p
if (queue[j]>queue[k]) ?I}jsm1)
break; s=#IoNh
SortUtil.swap(queue,j,k); @dX0gHU[c
k = j; U#G uB&V
} S1uW`zQ!+_
} acB,u&
*{W5QEa
} I'"*#QOX
ar+mj=m
} KQi9qj
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SortUtil： FMY r6/I
oV?tp4&
package org.rut.util.algorithm; ~cSC-|$^&
!Y=s_)X
import org.rut.util.algorithm.support.BubbleSort; o;FjpZ
import org.rut.util.algorithm.support.HeapSort; +f\tqucI3
import org.rut.util.algorithm.support.ImprovedMergeSort; Zm%}AzM
import org.rut.util.algorithm.support.ImprovedQuickSort; O8SX#,3^}
import org.rut.util.algorithm.support.InsertSort; 8>j+xbw
import org.rut.util.algorithm.support.MergeSort; ]w%7/N0R
import org.rut.util.algorithm.support.QuickSort; c}Jy'F7&f
import org.rut.util.algorithm.support.SelectionSort; V)R-w`
import org.rut.util.algorithm.support.ShellSort; GK/a^[f+'l
o]n5pZ\\W<
/** ,8o]XFOr
* @author treeroot ]=9%fA
* @since 2006-2-2 q "bpI8j
* @version 1.0 598xV|TON
*/ x)G/YUv76
public class SortUtil { L3Ry#uw
public final static int INSERT = 1; =N<Hc:<t4
public final static int BUBBLE = 2; T1PWFw\GH
public final static int SELECTION = 3; b9EJLD
public final static int SHELL = 4; +>z/54R
public final static int QUICK = 5; 51`w.ri
public final static int IMPROVED_QUICK = 6; R-`{W:S
public final static int MERGE = 7; $f>WR_F
public final static int IMPROVED_MERGE = 8; )U<4ul
public final static int HEAP = 9; yN{Ybp
A42At]
public static void sort(int[] data) { \_@u"+,$W
sort(data, IMPROVED_QUICK); &IT'%*Y:V
} S7aSUt!
private static String[] name={ $f1L<euH
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" DetBZ.
}; a&L8W4
""Drf=]
private static Sort[] impl=new Sort[]{ )%X\5]w`
new InsertSort(), tl;?/
new BubbleSort(), rZGbU&ZM8
new SelectionSort(), cWFvYF
new ShellSort(), (4ow0}1
new QuickSort(), G2a fHL<
new ImprovedQuickSort(), Iay7Fkv
new MergeSort(), ,-] JCcH
new ImprovedMergeSort(), ./#K@V1
new HeapSort() XIBw&mWf
}; Ea\a:
TM!R[-\
public static String toString(int algorithm){ 1b6gTfU
return name[algorithm-1]; xO1d^{~^^
} 6J%SkuxR
XF^c(*5
public static void sort(int[] data, int algorithm) { ys+?+dY2
impl[algorithm-1].sort(data); #l;Ekjfz
} I_pA)P*Q(6
z@~1e]%
public static interface Sort { +Ya-h~7;g#
public void sort(int[] data); C&e
} %Pa-fee
`9K'I-hv<8
public static void swap(int[] data, int i, int j) { _tjFb_}Q
int temp = data; 5R"b1
data = data[j]; CdZ;ZR
data[j] = temp; &~E=T3
} DT9i<kl
} C 2oll-kN